US3685371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing transmission
Assignee: Individual
•
Filing: 1971-04-05
•
Granted: 1972-08-22
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Expires: 1991-04-05
Abstract
Abstract A reversing transmission including a planetary gear mechanism comprised of helical gears. The carrier of the ring gear forms part of the sealed enclosure for the mechanism and is connected to the output shaft through splines to thereby permit axial movement of the ring gear. A normally engaged spring biased clutch is provided between the input shaft and the ring gear carrier. A caliper brake is provided for braking and stopping of the rotation of the planetary gear cage. Because of the helical teeth of the gears, the braking will cause the ring gear carrier to move against the bias of the spring to disengage the clutch and, as the cage is brought to a stop, the direction of rotation of the ring gear and thus, the output shaft is reversed.
Inventors
- 👤 James W Crooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:07
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
321 words
A reversing transmission adapted to transfer forward rotation of an input shaft to an output shaft of the transmission and adapted to reduce the speed and reverse the rotation of the output shaft in respect to the rotation of the input shaft, comprising in combination: A. a planetary gear mechanism comprised of: a. a sun gear fixed to the input shaft; b. planetary gears carried by a cage; and c. a ring gear means driveably connected to the output shaft to transfer rotational movement of said ring gear to the output shaft; B. axial movement means permitting movement of said ring gear means in an axial direction in respect to the axes of the gears of said planetary gear mechanism; C. clutch means including: a. one clutch member connected for movement with the input shaft; b. a second clutch member connected for movement with said ring gear means; and c. spring means exerting a force on said ring gear means to normally bias said two clutch members into operative engagement with each other. D. brake means connected to said cage and operative to reduce the speed of rotation of said cage in respect to the speed of rotation of the input shaft and to stop said rotation of said cage in respect to the transmission independently of the rotation of the input shaft; E. said sun and planetary gears and said ring gear means having helical teeth to cause said ring gear means to move in an axial direction and in opposition to the force of said spring means upon reduction of speed of said cage in respect to the speed of the input shaft; F. said axial movement of the ring gear means causing disengagement of said two clutch members and permitting said ring gear means to reverse direction of rotation of the output shaft upon continued forward rotation of said input shaft upon stoppage of rotation of said cage.
Claim 2
Dependent Claim
321 words
A reversing transmission adapted to transfer forward rotation of an input shaft to an output shaft of the transmission and adapted to reduce the speed and reverse the rotation of the output shaft in respect to the rotation of the input shaft, comprising in combination: A. a planetary gear mechanism comprised of: a. a sun gear fixed to the input shaft; b. planetary gears carried by a cage; and c. a ring gear means driveably connected to the output shaft to transfer rotational movement of said ring gear to the output shaft; B. axial movement means permitting movement of said ring gear means in an axial direction in respect to the axes of the gears of said planetary gear mechanism; C. clutch means including: a. one clutch member connected for movement with the input shaft; b. a second clutch member connected for movement with said ring gear means; and c. spring means exerting a force on said ring gear means to normally bias said two clutch members into operative engagement with each other. D. brake means connected to said cage and operative to reduce the speed of rotation of said cage in respect to the speed of rotation of the input shaft and to stop said rotation of said cage in respect to the transmission independently of the rotation of the input shaft; E. said sun and planetary gears and said ring gear means having helical teeth to cause said ring gear means to move in an axial direction and in opposition to the force of said spring means upon reduction of speed of said cage in respect to the speed of the input shaft; F. said axial movement of the ring gear means causing disengagement of said two clutch members and permitting said ring gear means to reverse direction of rotation of the output shaft upon continued forward rotation of said input shaft upon stoppage of rotation of said cage.
Claim 3
Dependent Claim
41 words
A reversing transmission according to claim 1 wherein said ring gear means includes a ring gear and a ring gear carrier and wherein said axial movement means is comprised of spline means connecting said ring gear carrier to the output shaft.
Claim 4
Dependent Claim
23 words
A reversing transmission according to claim 2 wherein said second clutch member is provided on the inside face of said ring gear carrier.
Claim 5
Dependent Claim
17 words
A reversing transmission according to claim 3 wherein both of said clutch members have frustoconical mating surfaces.
Claim 6
Dependent Claim
56 words
A reversing transmission according to claim 4 wherein said spring means is comprised of a spring engaging at one of its ends with the output shaft and engaging at the other of its ends with said ring gear carrier to exert a force on said carrier in a direction towards the base of said frustoconical surfaces.
Claim 7
Dependent Claim
33 words
A reversing transmission according to claim 5 wherein said Brake means includes a brake disc fixed to said cage member and brake engaging means fixed to the transmission and frictionally engaging said disc.
Claim 8
Dependent Claim
36 words
A reversing transmission according to claim 1 wherein the input and output shafts are co-axially aligned, and wherein said axial movement means is comprised of spline means between the output shaft and said ring gear means.
Claim 9
Dependent Claim
43 words
A reversing transmission according to claim 7 wherein a portion of the input shaft projects into an axial aperture of the output shaft, and wherein bearing means are provided between the inside wall of such aperture and said portion of the input shaft.
Claim 10
Dependent Claim
88 words
A reversing transmission according to claim 8 wherein said ring gear means is comprised of a ring gear and a ring gear carrier, and wherein said first clutch member is supported by a hub which is connected for rotation with the input shaft; a portion of said ring gear carrier forming in combination with portions of said hub and cage an enclosure for said sun, ring and planetary gears; and sealing means positioned between said ring gear carrier and said cage and between said carrier and said hub.
Claim 11
Dependent Claim
24 words
A reversing transmission according to claim 9 wherein said brake means and said first and second clutch means are positioned outside of said enclosure.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |