US3903757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic differential gear box
Assignee: Ustav Pro Vyzkum Motorovych Vozidel
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Filing: 1973-02-26
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Granted: 1975-09-09
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Expires: 1993-02-26
Abstract
Abstract A hydraulic transmission comprising a casing, a hydraulic torque converter, a reduction gear system and a collecting gear system. The hydraulic torque converter is connected to the input shaft and to the reduction gear system. A first clutch selectively engages the input shaft to the collecting gear system and a second clutch selectively engages the reduction gear system and the collecting gear system. The collecting gear is an epicyclic system and has a crown wheel adapted to be engaged by a brake whereby selective reverse running is obtained.
Inventors
- 👤 Antonin Hau
- 👤 Jiri Frydrych
- 👤 Jiri Srubar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H47/085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A hydraulic transmission comprising a casing, an input shaft, a hydraulic torque converter having an input connected to said input shaft, a reduction gear system connected to the output of said hydraulic torque converter, a collecting gear system comprising an epicyclic gear train having a crown wheel, a sun gear and a set of associated satellite gears, said satellite gears being mounted on a single carrier having an output shaft secured thereto, a first clutch means for selectively connecting said input shaft to the sun gear of said collecting gear system and second clutch means including a connecting shaft for selectively interengaging said reduction gear system with the sun gear of said collecting gear system, brake means fixed to said casing and selectively engagable with the crown gear wheel of said collecting gear system whereby said collecting gear system may be made to selectively drive said output shaft in the forward and reverse direction.
Claim 2
Dependent Claim
154 words
A hydraulic transmission comprising a casing, an input shaft, a hydraulic torque converter having an input connected to said input shaft, a reduction gear system connected to the output of said hydraulic torque converter, a collecting gear system comprising an epicyclic gear train having a crown wheel, a sun gear and a set of associated satellite gears, said satellite gears being mounted on a single carrier having an output shaft secured thereto, a first clutch means for selectively connecting said input shaft to the sun gear of said collecting gear system and second clutch means including a connecting shaft for selectively interengaging said reduction gear system with the sun gear of said collecting gear system, brake means fixed to said casing and selectively engagable with the crown gear wheel of said collecting gear system whereby said collecting gear system may be made to selectively drive said output shaft in the forward and reverse direction.
Claim 3
Dependent Claim
81 words
The transmission according to claim 1 wherein said reduction gear system comprises an epicyclic gear train having an input sun gear connected to the output of said torque converter and an output sun gear connect to said second clutch means, and including means for connecting the carrier of said collecting gear system to said second clutch, said second clutch being adapted to selectively connect said output sun gear with one of the sun gears and carrier of said collecting gear system.
Claim 4
Dependent Claim
38 words
The transmission according to claim 2 wherein said first clutch means disengages the input of the hydraulic torque converteR from the input shaft on engagement of said input shaft with the crown wheel of said collecting gear system.
Claim 5
Dependent Claim
38 words
The transmission according to claim 1 wherein said collecting gear system has an output shaft and includes additional clutch means interposed between the output shaft and the carrier of said collecting gear system for selectively engaging the same.
Claim 6
Dependent Claim
44 words
The transmission according to claim 1 wherein the reduction gear system includes a pair of parallel differential gear drives, one of said gear drives being connected to the output of the hydraulic torque converter, the other of which is connected to the input shaft.
Claim 7
Dependent Claim
20 words
The transmission according to claim 1 including an overrunning clutch interposed between said second clutch means and the connecting shaft.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |