US3782213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infinitely variable cone pulley transmission
Assignee: WERNER REIMERS KG
•
Filing: 1972-06-16
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Granted: 1974-01-01
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Expires: 1992-06-16
Abstract
Abstract In an infinitely variable cone pulley transmission with one cone fixed on a shaft and the other slidable thereon but rotatable therewith, a pressure chamber is formed connected with the movable disc. This is separated into two spaces by a partition secured on the shaft. Pressure fluid is supplied to the space nearest the pulley disc, and is allowed to pass through a throttled passage into the space remote from the pulley disc and to escape therefrom through a narrow annular slot in the portion of the space closest to the shaft axis. The axial pressure caused by centrifugal force in the first space is at least substantially counter-balanced by the axial force produced by the centrifugal force in the second space. Further, the continuous flow of pressure fluid prevents the build-up of localized heating in the pressure chamber.
Inventors
- 👤 M Rattunde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:23
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66272; F16H55/00; F16H55/32; F16H55/52; F16H55/56
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
In an infinitely variable conical pulley and belt transmission, having a shaft, a first cone pulley part fixed on the shaft, a second facing cone pulley part slidable on the shaft and rotatable therewith, means rigid with said second part forming a pressure cylinder, a separating wall secured on said shaft located within said pressure cylinder and dividing the same into a first chamber on the side nearest the second part and a second chamber remote from the second part, means to supply pressure fluid to said first chamber, fIrst means to permit limited flow of pressure fluid from the first chamber into the second chamber, and second means to permit limited flow of pressure fluid from the second chamber to the outside, whereby the axial forces produced in the first chamber by centrifugal force are at least to a substantial extent counter-balanced by axial forces produced in the second chamber by centrifugal force.
Claim 2
Dependent Claim
154 words
In an infinitely variable conical pulley and belt transmission, having a shaft, a first cone pulley part fixed on the shaft, a second facing cone pulley part slidable on the shaft and rotatable therewith, means rigid with said second part forming a pressure cylinder, a separating wall secured on said shaft located within said pressure cylinder and dividing the same into a first chamber on the side nearest the second part and a second chamber remote from the second part, means to supply pressure fluid to said first chamber, fIrst means to permit limited flow of pressure fluid from the first chamber into the second chamber, and second means to permit limited flow of pressure fluid from the second chamber to the outside, whereby the axial forces produced in the first chamber by centrifugal force are at least to a substantial extent counter-balanced by axial forces produced in the second chamber by centrifugal force.
Claim 3
Dependent Claim
19 words
In a transmission as claimed in claim 1, said first means including a throttled passage in said separating wall.
Claim 4
Dependent Claim
42 words
In a transmission as claimed in claim 1, said separating wall having a sealing means on its periphery engaging the inside of the pressure cylinder wall, said first means comprising said sealing means past which fluid can leak into the second chamber.
Claim 5
Dependent Claim
18 words
A transmission as claimed in claim 1, in which the effective cross-sectional areas of the chambers are equal.
Claim 6
Dependent Claim
24 words
A transmission as claimed in claim 1, in which the second means is located adjacent the portion of the second space nearest the shaft.
Claim 7
Dependent Claim
25 words
A transmission as claimed in claim 5, in which the second means is an annular gap at the inner edge of the cylinder forming means.
Claim 8
Dependent Claim
25 words
A transmission as claimed in claim 1, in which the second means is an annular gap at the inner edge of the cylinder forming means.
References Cited (Backward Citations)
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Cited
US3195368A
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US3280649A
Cited
US3451283A
Cited
US3596528A
Cited
US3600960A
Cited
US3600961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |