US4270355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master cylinder and actuator assemblies
Assignee: Girling Midland Ross Air Actuation Ltd
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Filing: 1978-07-20
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Granted: 1981-06-02
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Expires: 1998-07-20
Abstract
Abstract The invention relates to master cylinder and actuator assemblies in which a push rod connected to the actuator extends forwardly through a vehicle mounting member and is engageable at its forward end with a piston, there normally being a clearance between the push rod and the piston in their inoperative positions. Such assemblies suffer from the disadvantage that a desired working clearance is difficult to attain due to manufacturing tolerances. Embodiments of the present invention overcome that disadvantage and provide an assembly which includes a lateral projection (10) on the push rod (5), which projection limits rearward movement of the push rod relative to the mounting member (3).
Inventors
- 👤 Martin Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/58; B60T13/581; B60T13/583; B60T11/00; B60T11/10; B60T11/16; B60T13/24; B60T13/26; B60T13/40; B60T13/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A master cylinder and actuator assembly for a vehicle comprising mounting means interposed between adjacent ends of said cylinder and said actuator assembly for mounting said master cylinder and actuator in operative relationship with respect to each other, a push rod extending from the actuator through the mounting means and being moveable between retracted and extended position, said push rod being engageable with a piston working in the master cylinder when moved towards its extended position, and stop means comprising a lateral projection on the push rod which is engageable with the mounting means for limiting the retracted movement of said push rod relative to the mounting means, said stop means being so located on said push rod relative to said mounting means that when the piston of the master cylinder is in its inoperative position and said push rod is in its retracted position, there is a clearance between the piston and the adjacent end of the push rod.
Claim 2
Dependent Claim
160 words
A master cylinder and actuator assembly for a vehicle comprising mounting means interposed between adjacent ends of said cylinder and said actuator assembly for mounting said master cylinder and actuator in operative relationship with respect to each other, a push rod extending from the actuator through the mounting means and being moveable between retracted and extended position, said push rod being engageable with a piston working in the master cylinder when moved towards its extended position, and stop means comprising a lateral projection on the push rod which is engageable with the mounting means for limiting the retracted movement of said push rod relative to the mounting means, said stop means being so located on said push rod relative to said mounting means that when the piston of the master cylinder is in its inoperative position and said push rod is in its retracted position, there is a clearance between the piston and the adjacent end of the push rod.
Claim 3
Dependent Claim
44 words
An assembly according to claim 1 wherein said mounting means comprises a mounting member of the vehicle located in use between said piston and said actuator, and said stop means is engagable with said mounting member on the same side thereof as said piston.
Claim 4
Dependent Claim
20 words
An assembly according to claim 1, wherein said projection is provided by a stop member secured to the push rod.
Claim 5
Dependent Claim
26 words
An assembly according to claim 3, wherein said stop member is a screw-threaded member screwed on to a complementary screw threaded portion of the push rod.
Claim 6
Dependent Claim
34 words
An assembly according to claims 3 or 4, wherein the stop member is adjustable on the push rod to vary the length of push rod protruding through the mounting member towards the master piston.
Claim 7
Dependent Claim
13 words
An assembly according to claim 3, wherein the stop member is a washer.
Claim 8
Dependent Claim
19 words
An assembly according to claim 6, wherein the washer is located on the push rod by a spring clip.
Claim 9
Dependent Claim
30 words
An assembly according to claim 6, wherein the washer is located on the push rod by a screw-threaded member screwed on to a complementary screw-threaded portion of the push rod.
References Cited (Backward Citations)
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Cited
US2908137A
Cited
US3127966A
Cited
US3175473A
Cited
US3678687A
Cited
US3638427A
Cited
US4096696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |