US4221283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for facilitating gear changing in gear boxes
Assignee: Saab AB
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Filing: 1978-05-03
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Granted: 1980-09-09
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Expires: 1998-05-03
Abstract
Abstract An arrangement for facilitating engaging an unsynchronized reverse gear in a motor vehicle manual gearbox, where at least one forward gear is provided with a synchronizing means. A gripping means connected to the selector actuating means obtains force-transmitting connection with the forward gear selector during a part of the changing movement into reverse gear. Said force-transmitting connection is resilient in the shifting direction of the selector.
Inventors
- 👤 Kjell E. Nordkvist
- 👤 Lars H. Skog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/302; F16H63/34; F16H63/3408; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19284; Y10T74/19637
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
An arrangement for facilitating engaging a reverse gear not having synchronizing means in a gearbox for motor vehicles, said gearbox containing, in addition to said reverse gear, at least one forward gear provided with a synchronizing means, said gears being manually engageable and disengageable by means of a selector actuating means comprising a gear change lever operating at least one selector actuator rod and also comprising at least one selector actuator coacting with said selector actuator rod, whereby a gear changing movement for engaging a gear comprises a selection step and an engagement step, the selection step involving a movement in a first plane for the selector actuating means, and the engagement step involving a movement in a second plane for the selector actuating means, a gripping means connected to the selector actuating means being arranged to obtain force-transmitting connection with a forward gear selector during a part of the selector step for the changing movement into reverse gear, and for giving said forward gear selector a shifting movement so that a synchronizer incorporated in the synchronizing means of the forward gear is engaged, before the engagement step for the reverse gear is actuated characterized in that the force-transmitting connection between the gripping means and said forward gear selector is sprung in the shifting direction of said forward gear selector.
Claim 2
Dependent Claim
220 words
An arrangement for facilitating engaging a reverse gear not having synchronizing means in a gearbox for motor vehicles, said gearbox containing, in addition to said reverse gear, at least one forward gear provided with a synchronizing means, said gears being manually engageable and disengageable by means of a selector actuating means comprising a gear change lever operating at least one selector actuator rod and also comprising at least one selector actuator coacting with said selector actuator rod, whereby a gear changing movement for engaging a gear comprises a selection step and an engagement step, the selection step involving a movement in a first plane for the selector actuating means, and the engagement step involving a movement in a second plane for the selector actuating means, a gripping means connected to the selector actuating means being arranged to obtain force-transmitting connection with a forward gear selector during a part of the selector step for the changing movement into reverse gear, and for giving said forward gear selector a shifting movement so that a synchronizer incorporated in the synchronizing means of the forward gear is engaged, before the engagement step for the reverse gear is actuated characterized in that the force-transmitting connection between the gripping means and said forward gear selector is sprung in the shifting direction of said forward gear selector.
Claim 3
Dependent Claim
17 words
An arrangement as claimed in claim 1, characterized in that the gripping means includes said sprung function.
Claim 4
Dependent Claim
52 words
An arrangement as claimed in claim 2, characterized in that the force-transmitting connection between the gripping means and said forward gear selector takes place via an inclined surface which transfers the movement of the gripping means in the first plane to a movement of said forward gear selector in the second plane.
Claim 5
Dependent Claim
19 words
An arrangement as claimed in claim 3, characterized in that the gripping means is provided with the inclined surface.
Claim 6
Dependent Claim
41 words
An arrangement as claimed in any one of the preceding claims, characterized in that the gripping means consists of a wire spring fixedly connected to the selector actuator rod and formed with an end portion projecting towards said forward gear selector.
Claim 7
Dependent Claim
96 words
An arrangement as claimed in claims 1, 2, 3, or 4, in which a shift lock in the first plane is fixedly attached to the selector actuator rod, and in the second plane is fixedly attached to the gearbox casing and is formed with a cam coacting with the selector, characterized in that the cam has varying width in the second plane for limiting the sliding movement of said forward gear selector to a predetermined amount during the reverse gear engagement selection step, only the synchronizer of the synchronizing means being affected during said sliding movement.
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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |