Patent US3522041A successfully refreshed from Google Patents.
Patent US3795153A successfully refreshed from Google Patents.
US3795153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear change mechanism
Assignee: CAV Ltd
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Filing: 1972-05-12
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Granted: 1974-03-05
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Expires: 1992-05-12
Abstract
Abstract A gear change mechanism for a multi ratio gearbox includes selector bars movable axially one at a time to effect engagement of a particular ratio of the gearbox, each bar having a groove with which can co-operate a plurality of balls to prevent movement of two of the bars from the neutral position when the other bar is in a ratio selecting position. There is also provided a spring loaded locking member movable between a pair of balls and which when operative arrests movement of the bars at the neutral positions.
Inventors
- 👤 A Seilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:37
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/34; F16H63/36; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/20; Y10T74/20012; Y10T74/20018; Y10T74/20085; Y10T74/20104; Y10T74/20116
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A gear change mechanism comprising a selector bar movable in opposite directions from a neutral position, the bar being connected to gear selector members of an associated gear box whereby when the bar is moved in one direction from its neutral position one gear ratio of the gearbox will be selected and when moved in the opposite direction from its neutral position another gear ratio of the gearbox will be selected, an electric power operated actuating means operatively connected to said selector bar to effect movement thereof, said power operated actuating means being reversible whereby the bar can be moved in opposite directions, and locking mechanism operable to halt the movement of the bar at the neutral position.
Claim 2
Dependent Claim
118 words
A gear change mechanism comprising a selector bar movable in opposite directions from a neutral position, the bar being connected to gear selector members of an associated gear box whereby when the bar is moved in one direction from its neutral position one gear ratio of the gearbox will be selected and when moved in the opposite direction from its neutral position another gear ratio of the gearbox will be selected, an electric power operated actuating means operatively connected to said selector bar to effect movement thereof, said power operated actuating means being reversible whereby the bar can be moved in opposite directions, and locking mechanism operable to halt the movement of the bar at the neutral position.
Claim 3
Dependent Claim
65 words
A mechanism as claimed in claim 1 in which said locking mechanism comprises a groove on the selector bar, a locking member, a locking part movable by said locking member into said groove on the selector bar when the bar reaches the neutral position, thereby to prevent further movement of the bar, and resilient means for loading said locking member to move said locking part.
Claim 4
Dependent Claim
24 words
A mechanism as claimed in claim 2 including means operable to effect movement of said spring loaded member to permit movement of the bar.
Claim 5
Dependent Claim
23 words
A mechanism as claimed in claim 3 in which said means comprises a solenoid having an armature connected to said spring loaded member.
Claim 6
Dependent Claim
18 words
A mechanism as claimed in claim 4 including means providing lost motion between the armature and said member.
Claim 7
Dependent Claim
15 words
A mechanism as claimed in claim 5 in which said locking part comprises a ball.
Claim 8
Dependent Claim
65 words
A mechanism as claimed in claim 6 comprising a further selector bar position in spaced side by side relationship with the first mentioned bar, said further selector bar also having a groove with which can co-operate a locking part in the form of a ball, said spring loaded locking member being insertable between said balls to effect locking of both bars in the neutral position.
Claim 9
Dependent Claim
57 words
A mechanism as claimed in claim 7 including a passage extending between the selector bars, said balls being located in said passage, the balls and grooves being chosen in relation to the length of the passage such that when one bar is moved from the neutral position the other bar will be held in the neutral position.
Claim 10
Dependent Claim
65 words
A mechanism as claimed in claim 8 including an additional bar which is disposed parallel to but spaced from the other bars, a push member located in the central one of said bars, said push member transmitting motion between the balls intermediate the first mentioned and the further selector bars and further balls disposed between the additional bar and the central one of saId bars.
Claim 11
Dependent Claim
19 words
A mechanism as claimed in claim 3 in which said electric power operated actuating means comprises an electric motor.
Claim 12
Dependent Claim
19 words
A mechanism as claimed in claim 10 in which said motor includes a reduction mechanism incorporating an overload clutch.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |