US4376475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizer for motor vehicle gearboxes
Assignee: VOLV A CORP OF SWEDEN AB
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Filing: 1980-12-16
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Granted: 1983-03-15
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Expires: 2000-12-16
Abstract
Abstract In a synchronizer for vehicle gearboxes, a synchronizing ring has an external synchronizing cone which cooperates with an internal synchronizing cone on a shifting sleeve. The ring cone is made on an axial flange which extends from a radial web and is directed towards the shifting sleeve. An annular spring presses against the web and loads the synchronizing ring symmetrically.
Inventors
- 👤 Gregorz K. Janiszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:57
CPC Classifications
F; F16; F16D; F16D23/00; F16D23/02; F16D23/04; F16D23/06; F16D2023/0656; F16D2023/0662; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
In a synchronizer formotor vehicle gearboxes for synchronizing the rotational speed of a gear provided with engaging teeth and rotatably mounted on a shaft and a shifting sleeve provided with corresponding engaging teeth and nonrotatably but axially displaceably mounted on the shaft, comprising a synchronizing ring arranged between the gear and the shifting sleeve, said ring having a radial web with internal teeth for engaging the engaging teeth of the gear and an axially directed flange extending from the web, the outer limiting surface of said flange forming a conical friction surface for engaging a corresponding internal frictional surface on the shifting sleeve, the synchronizing ring being loaded in the direction towards the shifting sleeve by spring means pressing against the ring; the improvement in which the axial flange of the synchronizing ring is directed towards the shifting sleeve, and the ring is symmetrically loaded by annular spring means arranged coaxially with the shaft and supported by the engaging teeth of the gear.
Claim 2
Dependent Claim
163 words
In a synchronizer formotor vehicle gearboxes for synchronizing the rotational speed of a gear provided with engaging teeth and rotatably mounted on a shaft and a shifting sleeve provided with corresponding engaging teeth and nonrotatably but axially displaceably mounted on the shaft, comprising a synchronizing ring arranged between the gear and the shifting sleeve, said ring having a radial web with internal teeth for engaging the engaging teeth of the gear and an axially directed flange extending from the web, the outer limiting surface of said flange forming a conical friction surface for engaging a corresponding internal frictional surface on the shifting sleeve, the synchronizing ring being loaded in the direction towards the shifting sleeve by spring means pressing against the ring; the improvement in which the axial flange of the synchronizing ring is directed towards the shifting sleeve, and the ring is symmetrically loaded by annular spring means arranged coaxially with the shaft and supported by the engaging teeth of the gear.
Claim 3
Dependent Claim
23 words
A synchronizer according to claim 1, characterized in that said annular spring means are formed of at least one wave shaped spring ring.
Claim 4
Dependent Claim
30 words
A synchronizer according to claim 1, characterized in that said annular spring means are formed of at least one slotted spring ring from which arcuate spring tongues are bent out.
Claim 5
Dependent Claim
80 words
A synchronizer according to any one of claims 1-3, characterized in that the engaging teeth of the shifting sleeve are made on a hub portion, from which there extends a radial web which carries an axial flange, the inner limiting surface of which forms the frictional surface, said web being substantially narrower than the hub portion, so that the edge of the frictional surface closest to the web lies in a plane inside the outer edge of the hub portion.
Claim 6
Dependent Claim
29 words
A synchronizer according to claim 1, characterized in that said annular spring means are located between, and are in simultaneous contact with, the gear teeth and the synchronizing ring.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |