US3774715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle constant-speed cruising device
Assignee: Bosch Corp
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Filing: 1971-11-02
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Granted: 1973-11-27
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Expires: 1991-11-02
Abstract
Abstract A vehicle constant-speed cruising device that is simple in construction, in which a rotary fluid-pressure converter of the type mentioned above is employed in such a way as to generate an output related to a differential pressure between the atmosphere and a space in communication with an air intake pipe of an engine.
Inventors
- 👤 H Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:17
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/06; B60K31/10; G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/11; G01P3/00; G01P3/42; G01P3/44; G01P3/49; G01P3/495
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
371 words
A constant speed cruising control device for an engine driven vehicle including speed control means, said device comprising: 1. a pressure responsive means including a movable element the displacement of which is proportional to the variation in the pressure thereon; 2. means for coupling said pressure responsive means to the speed control means so that the engine speed of the vehicle is regulated relative to the displacement of the movable element of said pressure responsive means; 3. a rotary fluid pressure converter comprising (a) a casing, (b) means defining a path which extends through said casing and which includes an air inlet at one end thereof in communication with the ambient air and an air outlet at the other end thereof in communication with said pressure responsive means, (c) means defining a slit in said path which divides the path into two parts and which permits said air inlet and said air outlet to communicate with the interior of said casing, (d) a further air outlet which communicates with the interior of said casing, (e) means for connecting said further air outlet to the intake of the engine so as to introduce a negative pressure in the interior of said casing, and including a solenoid valve connected therein for controlling initiation and termination of the operation of said pressure converter, (f) a shaft located within said casing, (g) electromagnetic means for imparting a rotational torque to said shaft in accordance with the speed of the vehicle and including a rotating magnet, (h) spring means coupled to said shaft for biassing said shaft in a direction opposing said torque, and (i) a shield plate rigidly mounted on said shaft for rotation therewith, a portion of the peripheral edge of said shield plate being curved so that there is a variation in the radial distance between said edge and the shaft and said shield plate extending into said slit transversely to said air path so that a variation in the rotational position of the shaft will alter the cross sectional area of said air path and hence the pressure communicated to said pressure responsive means; and 4. means for controlling the actuation of said solenoid valve to control operation of said pressure converter.
Claim 2
Dependent Claim
371 words
A constant speed cruising control device for an engine driven vehicle including speed control means, said device comprising: 1. a pressure responsive means including a movable element the displacement of which is proportional to the variation in the pressure thereon; 2. means for coupling said pressure responsive means to the speed control means so that the engine speed of the vehicle is regulated relative to the displacement of the movable element of said pressure responsive means; 3. a rotary fluid pressure converter comprising (a) a casing, (b) means defining a path which extends through said casing and which includes an air inlet at one end thereof in communication with the ambient air and an air outlet at the other end thereof in communication with said pressure responsive means, (c) means defining a slit in said path which divides the path into two parts and which permits said air inlet and said air outlet to communicate with the interior of said casing, (d) a further air outlet which communicates with the interior of said casing, (e) means for connecting said further air outlet to the intake of the engine so as to introduce a negative pressure in the interior of said casing, and including a solenoid valve connected therein for controlling initiation and termination of the operation of said pressure converter, (f) a shaft located within said casing, (g) electromagnetic means for imparting a rotational torque to said shaft in accordance with the speed of the vehicle and including a rotating magnet, (h) spring means coupled to said shaft for biassing said shaft in a direction opposing said torque, and (i) a shield plate rigidly mounted on said shaft for rotation therewith, a portion of the peripheral edge of said shield plate being curved so that there is a variation in the radial distance between said edge and the shaft and said shield plate extending into said slit transversely to said air path so that a variation in the rotational position of the shaft will alter the cross sectional area of said air path and hence the pressure communicated to said pressure responsive means; and 4. means for controlling the actuation of said solenoid valve to control operation of said pressure converter.
Claim 3
Dependent Claim
35 words
means for coupling said pressure responsive means to the speed control means so that the engine speed of the vehicle is regulated relative to the displacement of the movable element of said pressure responsive means;
Claim 4
Dependent Claim
35 words
means for coupling said pressure responsive means to the speed control means so that the engine speed of the vehicle is regulated relative to the displacement of the movable element of said pressure responsive means;
Claim 5
Dependent Claim
132 words
A device as claimed in claim 1 wherein said means for controlling said solenoid valve includes an electrical circuit including solenoid means for controlling actuation of said solenoid valve, a start switch, a set switch, means for connecting said solenoid means, said start switch, and said set switch so that solenoid means is energized when both said start switch and said set switch are closed, a brake switch actuated responsive to the application of a vehicle brake, a clutch switch actuated responsive to the application of a vehicle clutch, and means for connecting said solenoid means, said start switch, said brake switch, and said clutch switch so that said solenoid means is de-energized when either of said brake switch or said clutch switch is closed or when said start switch is opened.
Claim 6
Dependent Claim
277 words
a rotary fluid pressure converter comprising (a) a casing, (b) means defining a path which extends through said casing and which includes an air inlet at one end thereof in communication with the ambient air and an air outlet at the other end thereof in communication with said pressure responsive means, (c) means defining a slit in said path which divides the path into two parts and which permits said air inlet and said air outlet to communicate with the interior of said casing, (d) a further air outlet which communicates with the interior of said casing, (e) means for connecting said further air outlet to the intake of the engine so as to introduce a negative pressure in the interior of said casing, and including a solenoid valve connected therein for controlling initiation and termination of the operation of said pressure converter, (f) a shaft located within said casing, (g) electromagnetic means for imparting a rotational torque to said shaft in accordance with the speed of the vehicle and including a rotating magnet, (h) spring means coupled to said shaft for biassing said shaft in a direction opposing said torque, and (i) a shield plate rigidly mounted on said shaft for rotation therewith, a portion of the peripheral edge of said shield plate being curved so that there is a variation in the radial distance between said edge and the shaft and said shield plate extending into said slit transversely to said air path so that a variation in the rotational position of the shaft will alter the cross sectional area of said air path and hence the pressure communicated to said pressure responsive means; and
Claim 7
Dependent Claim
277 words
a rotary fluid pressure converter comprising (a) a casing, (b) means defining a path which extends through said casing and which includes an air inlet at one end thereof in communication with the ambient air and an air outlet at the other end thereof in communication with said pressure responsive means, (c) means defining a slit in said path which divides the path into two parts and which permits said air inlet and said air outlet to communicate with the interior of said casing, (d) a further air outlet which communicates with the interior of said casing, (e) means for connecting said further air outlet to the intake of the engine so as to introduce a negative pressure in the interior of said casing, and including a solenoid valve connected therein for controlling initiation and termination of the operation of said pressure converter, (f) a shaft located within said casing, (g) electromagnetic means for imparting a rotational torque to said shaft in accordance with the speed of the vehicle and including a rotating magnet, (h) spring means coupled to said shaft for biassing said shaft in a direction opposing said torque, and (i) a shield plate rigidly mounted on said shaft for rotation therewith, a portion of the peripheral edge of said shield plate being curved so that there is a variation in the radial distance between said edge and the shaft and said shield plate extending into said slit transversely to said air path so that a variation in the rotational position of the shaft will alter the cross sectional area of said air path and hence the pressure communicated to said pressure responsive means; and
Claim 8
Dependent Claim
74 words
A device as claimed in claim 1 wherein said electrical circuit further comprises an automatic reset switch actuated by said shield plate when the vehicle speed exceeds a predetermined level and connected in series with a relay for initiating constant speed operation of the engine, and a low speed switch actuated by said shield plate when the vehicle speed drops below a further predetermined level for, when actuated, causing de-energization of said solenoid means.
Claim 9
Dependent Claim
16 words
means for controlling the actuation of said solenoid valve to control operation of said pressure converter.
Claim 10
Dependent Claim
16 words
means for controlling the actuation of said solenoid valve to control operation of said pressure converter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |