US3704634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infinitely variable cone pulley transmission
Assignee: Reimers Getriebe AG
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Filing: 1971-04-21
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Granted: 1972-12-05
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Expires: 1991-04-21
Abstract
Abstract In an infinitely variable cone pulley transmission the cone pulley pair on one of the two shafts (driving or driven) is pressed together by a helical coil spring and on the other shaft by a hydraulic force. On the hydraulically operated side the axially displaceable cone disc and the transmission shaft form together a cylinder and piston arrangement. A particularly compact dimensioning of the transmission and the control device is achieved by arranging the pressure pump housing immediately adjacent the transmission housing. The pressure pump housing contains in one block a slide valve for regulating the hydraulic pressure, lines for guiding the pressure liquid, first mechanical elements for automatically sensing and controlling the transmission ratio, and second mechanical means for manually overriding the automatically adjusted ratio.
Inventors
- 👤 Rudolf Schrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/04; F16H63/06; F16H63/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
347 words
An infinitely variable cone pulley transmission having a driving shaft and a driven shaft and a pair of conical discs on each shaft, one conical disc of each pair being laterally displaceable on the shaft and mechanically connected therewith for joint rotation, and an endless transmitting member suspended between the two pairs of conical discs, a spring operatively connected with the displaceable conical disc on one side of the transmission to urge the disc in the direction of the stationary conical disc, and hydraulic means urging the displaceable disc on the other side of the transmission in the direction of the stationary conical disc, said hydraulic means comprising: a. a gear pump for pumping hydraulic liquid into the transmission housing, said gear pump having a housing directly attached to the transmission housing; b. the driving shaft being provided with a bore in its axial direction and a hollow pump shaft extending through said bore into said driving shaft, and means operatively connecting the pump shaft to the driving shaft to be driven thereby; c. means associated with the conical disc and the driving shaft forming therewith a cylinder-piston aggregate; d. the axial bore in the driving shaft communicating with the interior of said piston-cylinder aggregate and said pump shaft being hollow and having its interior communicating with the bore in the driving shaft; e. means for controlling the flow of hydraulic liquid to the cylinder piston aggregate including a control valve in the pump housing having a movable element; f. a housing portion adjacent to the pump housing having a space therein, a setting lever arranged in said space, one arm of said setting lever being operatively connected with the axially displaceable conical disc on the driving shaft, and another arm being operatively connected to the movable element of the control valve, and manually settable means operatively engageable with said lever to adjust the leverage thereof; g. passages in said transmission housing and said pump housing, for connecting the pump, the space within the housing portion, the interior of the hollow pump shaft and the control valve.
Claim 2
Dependent Claim
347 words
An infinitely variable cone pulley transmission having a driving shaft and a driven shaft and a pair of conical discs on each shaft, one conical disc of each pair being laterally displaceable on the shaft and mechanically connected therewith for joint rotation, and an endless transmitting member suspended between the two pairs of conical discs, a spring operatively connected with the displaceable conical disc on one side of the transmission to urge the disc in the direction of the stationary conical disc, and hydraulic means urging the displaceable disc on the other side of the transmission in the direction of the stationary conical disc, said hydraulic means comprising: a. a gear pump for pumping hydraulic liquid into the transmission housing, said gear pump having a housing directly attached to the transmission housing; b. the driving shaft being provided with a bore in its axial direction and a hollow pump shaft extending through said bore into said driving shaft, and means operatively connecting the pump shaft to the driving shaft to be driven thereby; c. means associated with the conical disc and the driving shaft forming therewith a cylinder-piston aggregate; d. the axial bore in the driving shaft communicating with the interior of said piston-cylinder aggregate and said pump shaft being hollow and having its interior communicating with the bore in the driving shaft; e. means for controlling the flow of hydraulic liquid to the cylinder piston aggregate including a control valve in the pump housing having a movable element; f. a housing portion adjacent to the pump housing having a space therein, a setting lever arranged in said space, one arm of said setting lever being operatively connected with the axially displaceable conical disc on the driving shaft, and another arm being operatively connected to the movable element of the control valve, and manually settable means operatively engageable with said lever to adjust the leverage thereof; g. passages in said transmission housing and said pump housing, for connecting the pump, the space within the housing portion, the interior of the hollow pump shaft and the control valve.
Claim 3
Dependent Claim
46 words
A transmission as claimed in claim 1, in which said control valve constitutes a relief valve for permitting the escape of fluid above a certain pressure, and in which said passages include a passage in the transmission housing communicating with the outlet of said control valve.
Claim 4
Dependent Claim
39 words
The device as claimed in claim 1, in which a rod extending through the interior of the pump shaft and the bore in the driving shaft constitutes the connection between the axially displaceable conical disc and the control lever.
Claim 5
Dependent Claim
19 words
A transmission as claimed in claim 1, further comprising a throttle valve (40) arranged downstream from the control valve.
Claim 6
Dependent Claim
16 words
A transmission as claimed in claim 1, wherein the control valve is a controllable safety valve.
Claim 7
Dependent Claim
42 words
A transmission as claimed in claim 1, wherein manually settable means includes a lever (35) turnable mounted in the housing portion on which the lever is secured, said shaft being provided with an eccentrically projecting pin about which the set lever pivots.
Claim 8
Dependent Claim
25 words
An infinitely variable cone pulley transmission as claimed in claim 1, wherein the transmission shaft and the pump shaft are interconnected by a Cardan joint.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |