Patent US3484231A successfully refreshed from Google Patents.
Patent US3572803A successfully refreshed from Google Patents.
US3572803A
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Method and apparatus for lifting a load with a crane cable or the like
Assignee: Individual
•
Filing: 1968-11-07
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Granted: 1971-03-30
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Expires: 1988-11-07
Abstract
Abstract Suspending the load from a body which in turn is suspended from the crane cable, and relatively shifting the positions of the suspension point on the cable and the center of gravity of the combined body and load until in vertical alignment with the body and load disposed in a predetermined position which is usually horizontal. The relative shifting of the suspension point of the body from the cable and the center of gravity of the combined body and load may be effected either by shifting the cable suspension point or by shifting the load along the body. In addition it may be accomplished by counterweights movable along the body. In certain embodiments, a control arm is movably mounted on the body to sense the eccentricity of the load suspended from the body when the body and its load are lifted by the crane cable. Upon sensing the eccentricity, the control arm is employed to actuate a device such as a fluid motor to bring the cable suspension point and the combined center of gravity of the body and load into vertical alignment with each other. In another embodiment, the eccentricity of the load suspended from the body is sensed by a liquid level device mounted on the body to control a motive device employed in producing the alignment. In order to restore the body in a balanced position relative to the cable after the load is released from the body, an energy accumulator is provided to be charged with energy by virtue of vertical displacement of the cable suspension point which occurs either before or during the alignment operation. After the load is released the charged energy which in one embodiment is in the form of an energized spring, is employed to move the body about the cable suspension point until the body is restored to horizontal position.
Inventors
- 👤 Wilhelmus Antonius Maria Pompe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/105
Claims Analysis
Total Claims: 57
Claim 1
Independent Claim
142 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and solely mechanical actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to and from energy solely derived from swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the Load is ultimately balanced in predetermined position.
Claim 2
Dependent Claim
142 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and solely mechanical actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to and from energy solely derived from swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the Load is ultimately balanced in predetermined position.
Claim 3
Dependent Claim
27 words
Apparatus defined in claim 1 further including means for limiting movement of the body relative to the crane cable upon initial lifting of the body and load.
Claim 4
Dependent Claim
43 words
Apparatus defined in claim 1 wherein said actuating means includes a fluid motor and control means for supplying or exhausting the motor with motive fluid upon swinging movement of the body relative to the cable when the body and load are initially lifted.
Claim 5
Dependent Claim
17 words
Apparatus defined in claim 3 wherein said control means includes manually operable means mounted on said body.
Claim 6
Dependent Claim
62 words
Apparatus defined in claim 3 wherein said control means includes a control member mounted with respect to said body to move in response to movement of said body relative to the cable when initially lifting a load, and valve means connected to said fluid motor to supply or exhaust the same with motive fluid in response to actuation by said control member.
Claim 7
Dependent Claim
22 words
Apparatus defined in claim 5 wherein said control member is a pendulum having one end pivotally connected with respect to said body.
Claim 8
Dependent Claim
36 words
Apparatus defined in claim 5 further including hydraulic resistance means associated with said valve to delay movement of said valve and consequently initial operation of said fluid motor in ultimately balancing the load in predetermined position.
Claim 9
Dependent Claim
29 words
Apparatus defined in claim 7 wherein said hydraulic resistance means permits the body to be restored to a neutral position in an accelerated manner upon detachment of the load.
Claim 10
Dependent Claim
31 words
Apparatus defined in claim 1 wherein said body suspension means includes a cylinder and piston movable in the cylinder to provide movement of said body suspension means relative to the body.
Claim 11
Dependent Claim
38 words
Apparatus defined in claim 9 wherein said piston and cylinder are relatively movable to shift said body suspension means to align the cable suspension point and said center of gravity upon initial lifting of the body and load.
Claim 12
Dependent Claim
42 words
Apparatus defined in claim 10 further including restoration means for restoring the body into a predetermine position upon release of the load from the body, said restoration means being energized by vertical displacement of the body suspension means relative to the body.
Claim 13
Dependent Claim
16 words
Apparatus defined in claim 1 wherein said predetermined position of said body and load is horizontal.
Claim 14
Dependent Claim
46 words
Apparatus defined in claim 1 wherein said body suspension means is mounted for movement along the body and wherein said actuating means includes a motor for moving said body suspension means along the body to vertically align the cable suspension point and said center of gravity.
Claim 15
Dependent Claim
28 words
Apparatus defined in claim 13 wherein said body suspension means includes a piston and cylinder one of which is adapted to be connected to said cable suspension point.
Claim 16
Dependent Claim
19 words
Apparatus defined in claim 14 wherein said cylinder and piston extend generally vertically and in parallel to each other.
Claim 17
Dependent Claim
65 words
Apparatus defined in claim 1 wherein said body suspension means includes two fluid motors connected to said body and adapted to be connected to said cable, said fluid motors being operable to shift the cable suspension point into vertical alignment with said center of gravity in response to swinging movement of the body relative to the cable upon initially lifting the body and its load.
Claim 18
Dependent Claim
172 words
Apparatus for lifting loads by means of a crane cable or the like, apparatus comprising in combination, a body, a body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, means for providing relative movement between said body suspension means and said body, and solely mechanical actuating means energized solely through mechanical energy derived from relative vertical displacement of said body suspension means and said body for producing relative horizontal movement between said body suspension means and the center of gravity of the combined body anD load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, operation of said actuating means to ultimately balance the load in a predetermined position being initiated in response to swinging movement of the body relative to the cable upon initial lifting of the body and load.
Claim 19
Dependent Claim
172 words
Apparatus for lifting loads by means of a crane cable or the like, apparatus comprising in combination, a body, a body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, means for providing relative movement between said body suspension means and said body, and solely mechanical actuating means energized solely through mechanical energy derived from relative vertical displacement of said body suspension means and said body for producing relative horizontal movement between said body suspension means and the center of gravity of the combined body anD load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, operation of said actuating means to ultimately balance the load in a predetermined position being initiated in response to swinging movement of the body relative to the cable upon initial lifting of the body and load.
Claim 20
Dependent Claim
41 words
Apparatus defined in claim 17 wherein said actuating means is operated automatically in response to swinging movement of the body relative to the cable upon initially lifting the body and load whereby the load is ultimately balanced in predetermined position automatically.
Claim 21
Dependent Claim
37 words
Apparatus defined in claim 17 wherein said actuating means moves said load suspension means along the body until the center of gravity of the combined body and load is in vertical alignment with the cable suspension point.
Claim 22
Dependent Claim
51 words
Apparatus defined in claim 17 wherein said body includes a counterweight movable along said body, and said actuating mans is operable to move the counterweight along the body until the center of gravity of the combined body and load including the counterweight is in vertical alignment with the cable suspension point.
Claim 23
Dependent Claim
31 words
Apparatus defined in claim 19 wherein said load suspension means includes a trolley movable along said body and wherein said actuating means is operable to move said trolley along said body.
Claim 24
Dependent Claim
77 words
Apparatus defined in claim 18 wherein said actuating means includes a fluid motor and control means for supplying the motor with motive fluid upon swinging movement of the body relative to the cable when the body and load are initially lifted, said control means including a liquid level mounted on said body to move in response to swinging movement of the body relative to said cable during initial lifting of the load to control said fluid motor.
Claim 25
Dependent Claim
44 words
Apparatus defined in claim 22 wherein said control means further includes a slide valve operable in one direction in response to liquid in said liquid level, and spring means urging said slide valve in the opposite direction for restoring liquid in said liquid level.
Claim 26
Dependent Claim
68 words
Apparatus defined in claim 17 wherein said load suspension means is positioned on one side of said body and wherein the opposite side of said body contains a counterweight movable along the opposite side of said body by said actuating means to bring the center of gravity into vertical alignment with the cable suspension point, said body suspension means being located between said opposite sides of said body.
Claim 27
Dependent Claim
62 words
Apparatus defined in claim 24 wherein said body suspension mans includes a cylinder having a piston, motion transmitting means interconnecting said piston and said counterweight, said actuating means including control means for exhausting motive fluid from said cylinder to move the piston and ultimately said counterweight along said body until the center of gravity is vertically aligned with the cable suspension point.
Claim 28
Dependent Claim
34 words
Apparatus defined in claim 24 further including time delay means for delaying operation of said actuating means in response to swinging movement of the body relative to the cable upon initially lifting the body.
Claim 29
Dependent Claim
40 words
Apparatus defined in claim 26 further including restoration means for restoring the body to a neutral position when the load is detached therefrom, and means for accelerating movement of the body to the neutral position upon detachment of the load.
Claim 30
Dependent Claim
172 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said acTuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and restoration means for restoring the body to a predetermined position after the load is removed from the body, said restoration means being governed by vertical displacement of said body suspension means relative to the body.
Claim 31
Dependent Claim
172 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said acTuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and restoration means for restoring the body to a predetermined position after the load is removed from the body, said restoration means being governed by vertical displacement of said body suspension means relative to the body.
Claim 32
Dependent Claim
37 words
The apparatus defined in claim 28 wherein said restoration means includes spring means energized upon vertical displacement of said body suspension means relative to the body, and means interconnecting said spring means and said body suspension means.
Claim 33
Dependent Claim
169 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and restoration means for restoring the body to a predetermined position after the load is removed from the body, said restoration means being governed vertical displacement of said body suspension means relative to the body.
Claim 34
Dependent Claim
169 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and restoration means for restoring the body to a predetermined position after the load is removed from the body, said restoration means being governed vertical displacement of said body suspension means relative to the body.
Claim 35
Dependent Claim
36 words
Apparatus defined in claim 30 wherein said restoration means includes spring means energized upon vertical displacement of said body suspension means relative to the body and means interconnecting said spring means and said body suspension means.
Claim 36
Dependent Claim
26 words
Apparatus defined in claim 30 wherein said restoration means includes a fluid motor operatively connected to said body to move the body in a predetermined position.
Claim 37
Dependent Claim
32 words
Apparatus defined in claim 32 wherein said actuating means includes a fluid motor, and a control means for controlling the supply and exhaust of motive fluid to both of said fluid motors.
Claim 38
Dependent Claim
254 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said actuating means further including a fluid motor and control means for supplying or exhausting the motor with motive fluid upon swinging movement of the body relative to the cable when the body and load are initially lifted, said control mans including a control member mounted with respect to said body to move in response to movement of said body relative to the cable when initially lifting a load, and valve means connected to said fluid motor to supply or exhaust the same with motive fluid in response to actuation by said control member, said control member including an elongated arm pivotally connected with respect to said body and extending generally in the horizontal direction of said body.
Claim 39
Dependent Claim
254 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said actuating means further including a fluid motor and control means for supplying or exhausting the motor with motive fluid upon swinging movement of the body relative to the cable when the body and load are initially lifted, said control mans including a control member mounted with respect to said body to move in response to movement of said body relative to the cable when initially lifting a load, and valve means connected to said fluid motor to supply or exhaust the same with motive fluid in response to actuation by said control member, said control member including an elongated arm pivotally connected with respect to said body and extending generally in the horizontal direction of said body.
Claim 40
Dependent Claim
36 words
Apparatus defined in claim 17 wherein said control means further includes a slide connected to said control member and said valve means, and spring means normally urging said slide and control Member into a predetermined position.
Claim 41
Dependent Claim
240 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and the center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said body suspension means including two fluid motors connected to said body and adapted to be connected to said cable, said fluid motors being operable to shift the cable suspension point into vertical alignment with said center of gravity in response to swinging movement of the body relative to the cable upon initially lifting the body and its load, said fluid motors extending at an oblique angle relative to the body and converging at the cable suspension point, said fluid motors being pivotally connected with respect to said body to pivot relative to said body while aligning the cable suspension point with the center of gravity.
Claim 42
Dependent Claim
240 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point and the center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said body suspension means including two fluid motors connected to said body and adapted to be connected to said cable, said fluid motors being operable to shift the cable suspension point into vertical alignment with said center of gravity in response to swinging movement of the body relative to the cable upon initially lifting the body and its load, said fluid motors extending at an oblique angle relative to the body and converging at the cable suspension point, said fluid motors being pivotally connected with respect to said body to pivot relative to said body while aligning the cable suspension point with the center of gravity.
Claim 43
Dependent Claim
164 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point is at center of gravity or vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and hydraulic means for operating said actuating means, said hydraulic means including hydraulic resistance means for delaying initial operation of said actuating means in ultimately balancing the load in predetermined position.
Claim 44
Dependent Claim
164 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, actuating means for moving said body suspension means relative to the center of gravity of the combined body and load until the cable suspension point is at center of gravity or vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, and hydraulic means for operating said actuating means, said hydraulic means including hydraulic resistance means for delaying initial operation of said actuating means in ultimately balancing the load in predetermined position.
Claim 45
Dependent Claim
12 words
Apparatus defined in claim 37 wherein said resistance means includes variable restrictors.
Claim 46
Dependent Claim
222 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, a body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, means for providing relative movement between said body suspension means and said body, and actuating means energized by relative vertical displacement of said body suspension means and said body for producing relative horizontal movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, operation of said actuating means to ultimately balance the load in a predetermined position being initiated in response to swinging movement of the body relative to the cable upon initial lifting of the body and load, and restoration means for restoring the body to a predetermined neutral position after the load is detached from the body, said means for producing relative vertical movement between said body suspension means and said body also being employed to energize said restoration means for restoring the body to the neutral position upon detachment of the load.
Claim 47
Dependent Claim
222 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combination, a body, a body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, means for providing relative movement between said body suspension means and said body, and actuating means energized by relative vertical displacement of said body suspension means and said body for producing relative horizontal movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, operation of said actuating means to ultimately balance the load in a predetermined position being initiated in response to swinging movement of the body relative to the cable upon initial lifting of the body and load, and restoration means for restoring the body to a predetermined neutral position after the load is detached from the body, said means for producing relative vertical movement between said body suspension means and said body also being employed to energize said restoration means for restoring the body to the neutral position upon detachment of the load.
Claim 48
Dependent Claim
206 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combinAtion, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said body suspension means and said actuating mans being constituted by at least one fluid motor having one end pivotally connected to said body and another end adapted to be connected to said cable to be operable to shift the cable suspension point into vertical alignment with said center of gravity in response to swinging movement of the body relative to the cable upon lifting the body and its load.
Claim 49
Dependent Claim
206 words
Apparatus for lifting loads by means of a crane cable or the like, the apparatus comprising in combinAtion, a body, body suspension means connected to the body for suspending the body from a point on a crane cable or the like, load suspension means on the body for suspending from the body the load to be lifted, and actuating means for producing relative movement between said body suspension means and the center of gravity of the combined body and load until the cable suspension point and said center of gravity are vertically aligned with the body and load in a predetermined position, said actuating means being operable in response to swinging movement of the body relative to the cable upon initially lifting the body and its load whereby the load is ultimately balanced in predetermined position, said body suspension means and said actuating mans being constituted by at least one fluid motor having one end pivotally connected to said body and another end adapted to be connected to said cable to be operable to shift the cable suspension point into vertical alignment with said center of gravity in response to swinging movement of the body relative to the cable upon lifting the body and its load.
Claim 50
Dependent Claim
74 words
Apparatus defined in claim 40 wherein said body suspension means and actuating means further includes a second fluid motor associated with said first fluid motor, said fluid motors extending at an oblique angle relative to the body and converging at the cable suspension point, said second fluid motor being pivotally connected with respect to said body to pivot relative to said body during alignment of the cable suspension point with the center of gravity.
Claim 51
Dependent Claim
81 words
Apparatus defined in claim 40 further including control means for supplying and exhausting fluid motor upon swinging movement of the body relative to the cable, said control mans including a control member mounted with respect to said body to move in response to movement of said body relative to the cable when initially lifting a load, and valve means connected to said fluid motor to supply and exhaust the same with motive fluid in response to actuation by said control member.
Claim 52
Dependent Claim
38 words
Apparatus defined in claim 42 further including hydraulic resistance means associated with said valve means to delay movement of said valve means and consequently initial operation of said fluid motor in ultimately balancing the load in predetermined position.
Claim 53
Independent Claim
152 words
A method of lifting and balancing a load with respect to a crane cable or the like comprising the steps of: attaching the load to a body, connecting the body with respect to the crane cable, raising the crane cable to lift the body and the load and to produce vertical displacement of the body relative to the crane cable suspension point, sensing swinging movement of the body relative to the crane cable as a result of any eccentric loading, and actuating a motor on the body in accordance with the sensed eccentric loading to align the suspension point of the cable with the center of gravity of the combined body and load while bringing said body and load into a predetermined position, and employing the said vertical displacement to charge a motive device for restoring the body relative to the crane cable in a predetermined position upon release of the load.
Claim 54
Independent Claim
152 words
A method of lifting and balancing a load with respect to a crane cable or the like comprising the steps of: attaching the load to a body, connecting the body with respect to the crane cable, raising the crane cable to lift the body and the load and to produce vertical displacement of the body relative to the crane cable suspension point, sensing swinging movement of the body relative to the crane cable as a result of any eccentric loading, and actuating a motor on the body in accordance with the sensed eccentric loading to align the suspension point of the cable with the center of gravity of the combined body and load while bringing said body and load into a predetermined position, and employing the said vertical displacement to charge a motive device for restoring the body relative to the crane cable in a predetermined position upon release of the load.
Claim 55
Dependent Claim
48 words
The method defined in claim 44 further including the step of vertically displacing the body relative to the crane cable suspension point prior to the alignment process for storing energy for restoring the body into a predetermined position relative to the crane cable after the load is released.
Claim 56
Dependent Claim
47 words
The method defined in claim 44 wherein the said vertical displacement of the body relative to the crane cable suspension point is also employed to actuate said motor for aligning the suspension point of the cable with the center of gravity of the combined body and load.
Claim 57
Dependent Claim
33 words
The method defined in claim 44 further including the step of producing relative vertical displacement between said body and the crane cable suspension point for actuating said motor for producing the said alignment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |