US3826151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power train
Assignee: United States Department of the Army
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Filing: 1973-02-27
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Granted: 1974-07-30
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Expires: 1993-02-27
Abstract
Abstract Bevel gears are adjustable as to prevailing torque, tooth load, and backlash. A bearing pod supporting a gear shaft is externally threaded and the gear case is internally threaded. An annular driver between the pod and the case carries internal and external threads of different pitches but the same hand. Rotation of the annulus while pod and case are held stationary provides microadjustability of the associated gear away from or toward the other gear to achieve the desired mesh as to backlash, tooth contact pattern, and prevailing torque.
Inventors
- 👤 Geppert E F
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/04; F16H1/12; F16H1/14; F16H55/00; F16H55/02; F16H55/17; F16H55/18; F16H55/20; F16C; F16C2361/00; F16C2361/61; F16H57/00; F16H57/02; F16H57/021; F16H57/022; F16H2057/0221; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1956; Y10T74/19585
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A power train having two meshing bevel gears rotatably mounted in a suitable support, wherein the mounting means for at least one gear comprises: a. a portion of the support having a threaded opening of which the thread has a given pitch; b. an annulus having an external thread co-operable with the thread of said opening, and an internal thread having a pitch different from said given pitch; and c. a bearing pod having i. an external thread cooperable with the internal thread of the annulus, and ii. means to provide rotatable support for a shaft adapted to carry said at least one gear.
Claim 2
Dependent Claim
104 words
A power train having two meshing bevel gears rotatably mounted in a suitable support, wherein the mounting means for at least one gear comprises: a. a portion of the support having a threaded opening of which the thread has a given pitch; b. an annulus having an external thread co-operable with the thread of said opening, and an internal thread having a pitch different from said given pitch; and c. a bearing pod having i. an external thread cooperable with the internal thread of the annulus, and ii. means to provide rotatable support for a shaft adapted to carry said at least one gear.
Claim 3
Dependent Claim
20 words
A power train as in claim 1, wherein the difference between the two thread pitches is no greater than unity.
Claim 4
Dependent Claim
131 words
A power train having two meshing bevel gears rotatably mounted in a suitable support, wherein the mounting means for at least one gear comprises: a. a portion of the support having a threaded opening of which the thread has a given pitch; b. a driver having i. a first thread in engagement with the thread of said opening, said first driver thread having said given pitch, and ii. a second thread having a pitch different from said given pitch; and c. a bearing pod having i. means to provide rotatable support for a shaft adapted to carry said at least one gear, and ii. threaded means, of which the thread engages the second driver thread, for shifting the bearing pod longitudinally along the rotational axis of said at least one gear.
Claim 5
Dependent Claim
131 words
A power train having two meshing bevel gears rotatably mounted in a suitable support, wherein the mounting means for at least one gear comprises: a. a portion of the support having a threaded opening of which the thread has a given pitch; b. a driver having i. a first thread in engagement with the thread of said opening, said first driver thread having said given pitch, and ii. a second thread having a pitch different from said given pitch; and c. a bearing pod having i. means to provide rotatable support for a shaft adapted to carry said at least one gear, and ii. threaded means, of which the thread engages the second driver thread, for shifting the bearing pod longitudinally along the rotational axis of said at least one gear.
Claim 6
Dependent Claim
23 words
A power train as in claim 3, wherein the difference between the pitches of the two driver threads is no greater than unity.
Claim 7
Dependent Claim
39 words
A power train as in claim 3, wherein said pod has the configuration of a closed loop, and wherein the means to provide rotatable support and said threaded means occupy opposed positions in the closed loop and are coaxial.
Claim 8
Dependent Claim
24 words
A power train as in claim 5, and key means for holding the bearing pod against rotation about said axis relative to said support.
Claim 9
Dependent Claim
26 words
A power train as in claim 6, wherein the key means are disposed in the closed loop between said support providing means and said threaded means.
Claim 10
Dependent Claim
24 words
A power train as in claim 3, and key means for holding the bearing pod against rotation about said axis relative to said support.
Claim 11
Dependent Claim
24 words
A power train as in claim 8, the key means being disposed in the pod between said support providing means and said threaded means.
Claim 12
Dependent Claim
26 words
A power train as in claim 3, wherein the driver is elongated and its first and second threads are coaxial and spaced apart along the axis.
References Cited (Backward Citations)
US2788674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |