Patent US3033256A successfully refreshed from Google Patents.
Patent US3633716A successfully refreshed from Google Patents.
US3633716A
Expired / Lapsed
US
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Synchronous device for change-speed gears especially for motor vehicles
Assignee: Dr Ing HCF Porsche AG
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Filing: 1970-04-14
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Granted: 1972-01-11
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Expires: 1990-04-14
Abstract
Abstract A synchronous device for change-speed gears, especially for motor vehicles, wherein slotted rings are under the influence of a locking means for increasing the servo effect which are arranged between each of the springy slotted rings and the hub of its associated clutch body. The locking means includes a slotted band having a camlike form body in the shape of an arched depression disposed in a recess in the associated clutch body and cooperates with a slidable stop extending between the ends of the ring. The working direction which serves for the reverse shifting of a speed is provided with a larger, effective gripping length than is provided for shifting to a higher gear.
Inventors
- 👤 Gunther Gortz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:01
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D23/025
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
Synchronous device for change speed gears, especially for motor vehicles, of the type having a slotted synchronous ring positioned between a driving gear and a driven gear for selectively and synchronously transferring rotational forces from the driving gear to the driven gear; comprising a slotted synchronous ring disposed circumferentially about a hub of the driving gear, said ring being in selective abutting engagement with the driven gear, a stop slidably disposed on said hub and having a first portion extending between the ends of said ring, and locking means arranged between said ring and said hub and being operatively associated with said stop for synchronously transferring rotational forces from said synchronous ring to said hub, said locking means including a slotted band having a camlike form body between the ends thereof, said camlike form body being disposed in a recess on said hub, said stop body further including a second portion positioned between the ends of said band.
Claim 2
Dependent Claim
158 words
Synchronous device for change speed gears, especially for motor vehicles, of the type having a slotted synchronous ring positioned between a driving gear and a driven gear for selectively and synchronously transferring rotational forces from the driving gear to the driven gear; comprising a slotted synchronous ring disposed circumferentially about a hub of the driving gear, said ring being in selective abutting engagement with the driven gear, a stop slidably disposed on said hub and having a first portion extending between the ends of said ring, and locking means arranged between said ring and said hub and being operatively associated with said stop for synchronously transferring rotational forces from said synchronous ring to said hub, said locking means including a slotted band having a camlike form body between the ends thereof, said camlike form body being disposed in a recess on said hub, said stop body further including a second portion positioned between the ends of said band.
Claim 3
Dependent Claim
19 words
Synchronous device according to claim 1, wherein the camlike form body is disposed at the midpoint of said band.
Claim 4
Dependent Claim
42 words
Synchronous device according to claim 1, wherein the camlike form body is disposed closer to one end of said band then the other to provide different effective gripping lengths of said band in dependence on the direction of rotation of the ring.
Claim 5
Dependent Claim
29 words
Synchronous device according to claim 3, wherein the longer effective gripping length of said band is provided for the direction of rotation corresponding to a reverse shifting of speed.
Claim 6
Dependent Claim
23 words
Synchronous device according to claim 1, wherein the first portion of said stop is narrower in the circumferential direction than the second portion.
Claim 7
Dependent Claim
26 words
Synchronous device according to claim 1, wherein said locking means includes means to exhibit greater locking force in one direction of force than in the other.
Claim 8
Dependent Claim
21 words
Synchronous device according to claim 1, wherein said slotted band is substantially cylindrical in form and is made of spring steel.
Claim 9
Dependent Claim
44 words
Synchronous device according to claim 1, wherein said recess is asymmetric with respect to an axis extending radially from the center of said hub and said camlike form body is symmetric with respect to an axis extending radially from the center of the band.
Claim 10
Dependent Claim
32 words
Synchronous device according to claim 1, wherein the camlike form body means is formed by an arched depression in the area between the ends of the slotted band in the circumferential direction.
References Cited (Backward Citations)
GB924798A
Cited
US3378122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |