US3691869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed hydraulic transmission
Assignee: Individual
•
Filing: 1970-06-25
•
Granted: 1972-09-19
•
Expires: 1990-06-25
Abstract
Abstract A variable speed transmission connecting an input shaft to an output shaft and including at least one rotating clutch. The clutch is operated by hydraulic pressure fluid delivered to and removed from the outer circumferential periphery of the clutch. Preferably, a plurality of these clutches are arranged on a main shaft of the transmission, and one or more of these clutches may be double clutches, that is, two separate clutches connected to a common coupling member. A secondary shaft operatively engaged with the input shaft includes gears for operating selected ones of said clutches. A turbine blade may be provided between the input shaft and the clutches and a planetary gear brake may be provided between the clutches and the output shaft.
Inventors
- 👤 Hermann Klaue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:23
CPC Classifications
F; F16; F16D; F16D67/00; F16H; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H37/046; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19233
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A variable speed transmission for changing the speed ratio between an input and output shaft comprising an input shaft, an output shaft, a variable speed transmission operatively connecting the input shaft to the output shaft, said transmission including at least one hydraulically operated rotating friction clutch, said friction clutch including a chamber which rotates with the clutch when the clutch is engaged, said chamber defined in part by a member responsive to the pressure in the chamber to engage the clutch, said chamber being further defined by a nonrotating stationary annular housing which surrounds said clutch member circumferentially, passage means for supplying hydraulic fluid to and for removing fluid from the said clutch chamber, said passage means connected to the interior of the annular oil housing to supply fluid to and remove from the outer circumferential periphery of the clutch chamber through the part thereof defined by said annular housing.
Claim 2
Dependent Claim
150 words
A variable speed transmission for changing the speed ratio between an input and output shaft comprising an input shaft, an output shaft, a variable speed transmission operatively connecting the input shaft to the output shaft, said transmission including at least one hydraulically operated rotating friction clutch, said friction clutch including a chamber which rotates with the clutch when the clutch is engaged, said chamber defined in part by a member responsive to the pressure in the chamber to engage the clutch, said chamber being further defined by a nonrotating stationary annular housing which surrounds said clutch member circumferentially, passage means for supplying hydraulic fluid to and for removing fluid from the said clutch chamber, said passage means connected to the interior of the annular oil housing to supply fluid to and remove from the outer circumferential periphery of the clutch chamber through the part thereof defined by said annular housing.
Claim 3
Dependent Claim
26 words
A transmission according to claim 1 including a plurality of said clutches arranged in series in said transmission between said input shaft and said output shaft.
Claim 4
Dependent Claim
95 words
A transmission according to claim 1 wherein said clutch is a double clutch comprising a central coupling member coupled to a main shaft of the transmission, a separately operated clutch on each axial side of said coupling member and said member responsive to the pressure in the chamber being a fluid operated piston, a said chamber being located between the coupling member and each said separately operated piston, and wherein said passage means includes means for supplying hydraulic fluid to either one of said chambers to operatively engage the coupling member with the main shaft.
Claim 5
Dependent Claim
74 words
A transmission according to claim 1 wherein said transmission includes a main shaft, said clutch connecting the input shaft to the main shaft, and including a planetary gear between the clutch and the output shaft, said main shaft being connected to a sun gear of the planetary gear, and the planet gears of the planetary gear being connected to the output shaft, and including a ring gear surrounding and engaged with the planetary gears.
Claim 6
Dependent Claim
46 words
A transmission according to claim 4 including a fluid operated brake for holding the said ring gear against rotation, and including a spring operated brake for connecting the ring gear with a means for operating a hydraulic pump connected to and operated by said output shaft.
Claim 7
Dependent Claim
17 words
A transmission according to claim 1 including a hydraulic turbine between the input shaft and the clutch.
Claim 8
Dependent Claim
82 words
A transmission according to cLaim 1 including a main shaft operatively connecting the clutch to the output shaft, and including at least one secondary shaft in driving engagement with the input shaft and with a central gear freely rotatably mounted on the main shaft, said secondary shaft including at least one gear fixed thereon and connected to said central gear whereby the input shaft is engaged with the output shaft through the secondary shaft and the clutch when that clutch is engaged.
Claim 9
Dependent Claim
110 words
A transmission according to claim 7 including a plurality of hydraulic clutches arranged in series on the main shaft, and wherein each said clutch is a double clutch comprising a central coupling member coupled to the main shaft of the transmission, a separately operated clutch on each axial side of said coupling member, and said member responsive to the pressure in the chamber being a fluid operated piston, a said chamber being located between the coupling member and each said separately operated piston, and wherein said passage means includes means for supplying hydraulic fluid to either one of said chambers to operatively engage the coupling member with the main shaft.
Claim 10
Dependent Claim
34 words
A transmission according to claim 7 including an antifriction bearing supporting the central gear on the main shaft, and including elastic support elements between the bearing and the inner periphery of the central gear.
References Cited (Backward Citations)
US2055970A
Cited
US2169639A
Cited
US2406417A
Cited
US2701042A
Cited
US2699689A
Cited
US2844043A
Cited
US3313171A
Cited
US3256542A
Cited
US3396610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |