Patent US4282776A successfully refreshed from Google Patents.
US4282776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overload protection for transmission system with planetary-gear train
Assignee: Individual
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Filing: 1979-03-29
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Granted: 1981-08-11
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Expires: 1999-03-29
Abstract
Abstract The sun gear and the planet carrier of a planetary-gear train are connected with respective shafts, one of them driven and the other coupled with a load, while the ring gear is resiliently anchored to a surrounding housing so as to be rotatable with reference thereto in the event of an overload. Depending on the direction of relative rotation, a control member coupled with the ring gear actuates one of two switches or switch groups to generate an alarm signal or to take corrective action.
Inventors
- 👤 Fritz D. Eller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:13
CPC Classifications
F; F16; F16H; F16H35/00; F16H35/10; F16H1/00; F16H1/28; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/19274
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
In a transmission system comprising an input shaft driven by a power source, an output shaft coupled with a load, and a planetary-gear train including a sun gear connected with one of said shafts, a planet carrier connected with the other of said shafts and a ring gear disposed in a stationary housing, the combination therewith of: yieldable retaining means tending to hold said ring gear in a predetermined position relative to said housing; control means entrained by said ring gear; first and second position-sensing means secured to said housing and juxtaposed with said control means for detecting a relative rotation of said ring gear beyond respective limits on opposite sides of said predetermined position; and first and second overload-signaling means respectively controlled by said first and second position-sensing means for indicating the sense of deviation of said ring gear from said predetermined position.
Claim 2
Dependent Claim
144 words
In a transmission system comprising an input shaft driven by a power source, an output shaft coupled with a load, and a planetary-gear train including a sun gear connected with one of said shafts, a planet carrier connected with the other of said shafts and a ring gear disposed in a stationary housing, the combination therewith of: yieldable retaining means tending to hold said ring gear in a predetermined position relative to said housing; control means entrained by said ring gear; first and second position-sensing means secured to said housing and juxtaposed with said control means for detecting a relative rotation of said ring gear beyond respective limits on opposite sides of said predetermined position; and first and second overload-signaling means respectively controlled by said first and second position-sensing means for indicating the sense of deviation of said ring gear from said predetermined position.
Claim 3
Dependent Claim
19 words
The combination defined in claim 1 wherein said control means comprises a member extending radially from said ring gear.
Claim 4
Dependent Claim
17 words
The combination defined in claim 2 wherein said retaining means comprises spring means bearing upon said member.
Claim 5
Dependent Claim
34 words
The combination defined in claim 3 wherein said spring means comprises a pair of counteracting springs disposed on opposite sides of said member in a plane transverse to the axis of said ring gear.
Claim 6
Dependent Claim
25 words
The combination defined in claim 1, 3 or 4 wherein said control means, said retaining means and said position-sensing means are disposed inside said housing.
Claim 7
Dependent Claim
28 words
The combination defined in claim 1 wherein said ring gear is provided with a toothed peripheral zone, said control means comprising a pinion meshing with said toothed zone.
Claim 8
Dependent Claim
44 words
The combination defined in claim 6 wherein said pinion is provided with a supporting shaft journaled in a wall of said housing in substantially fluidtight manner, said control means further including a member on an external portion of said supporting shaft beyond said wall.
Claim 9
Dependent Claim
27 words
The combination defined in claim 1, 3 or 6 wherein said first and second position-sensing means comprise a pair of switches mechanically actuatable by said control means.
Claim 10
Dependent Claim
30 words
The combination defined in claim 1 wherein said first and second position-sensing means comprise at least two magnetic sensors, said control means being a ferromagnetic element on said ring gear.
Claim 11
Dependent Claim
14 words
The combination defined in claim 9 wherein said ferromagnetic element is a permanent magnet.
Claim 12
Dependent Claim
31 words
The combination defined in claim 9 or 10 wherein said first and second position-sensing means each comprise a plurality of magnetic sensors angularly spaced around the axis of said ring gear.
Claim 13
Dependent Claim
38 words
The combination defined in claim 4 wherein said retaining means further comprises separate stress-adjusting elements for independently varying the forces of said springs resisting displacement of said ring gear from said predetermined position in respective directions of rotation.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |