US3972190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle brake pedal arrangements
Assignee: Girling Ltd
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Filing: 1974-11-18
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Granted: 1976-08-03
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Expires: 1994-11-18
Abstract
Abstract A brake actuating assembly for actuating a master cylinder having a power assistor comprises a brake pedal pivotable about a pivot point at one end and connected at a point intermediate its ends to an actuating member of the master cylinder, movement of the actuator member also actuating the power assistor, the pivot point being connected to a piston of a fluid motor operable in response to the operating pressure of the power assistor the arrangement being such that in normal operation the pressure of the power assistor actuates the piston to hold the pivot point in a fixed position but upon failure of the power assisting means the pivot point is moved to vary the pedal ratio, to permit the master cylinder to be operated without power assistance.
Inventors
- 👤 Patrick Frank Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/02; B60T7/04; B60T7/06; B60T13/00; B60T13/10; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20528
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
143 words
A brake pedal assembly for actuating a master cylinder having a power assisting means, comprising a brake pedal pivotable about a first movable pivot point, an actuating member having a pivotal connection with said brake pedal at a point intermediate the ends of said pedal, said actuating member being movable with said pedal to actuate said master cylinder, means holding said first pivot point in a fixed position during normal operation of said power assisting means so that said pedal normally pivots about said first pivot point, means applying the force of said power assisting means to said brake pedal, and a fixed fulcrum intermediate said first-mentioned pivot point and said connection between said pedal and said actuating member and being engageable by said pedal to define a second pivot point about which said pedal fulcrums upon failure of said power assisting means.
Claim 2
Dependent Claim
143 words
A brake pedal assembly for actuating a master cylinder having a power assisting means, comprising a brake pedal pivotable about a first movable pivot point, an actuating member having a pivotal connection with said brake pedal at a point intermediate the ends of said pedal, said actuating member being movable with said pedal to actuate said master cylinder, means holding said first pivot point in a fixed position during normal operation of said power assisting means so that said pedal normally pivots about said first pivot point, means applying the force of said power assisting means to said brake pedal, and a fixed fulcrum intermediate said first-mentioned pivot point and said connection between said pedal and said actuating member and being engageable by said pedal to define a second pivot point about which said pedal fulcrums upon failure of said power assisting means.
Claim 3
Dependent Claim
19 words
An assembly according to claim 1, including spring means biasing said first pivot point to its normal, fixed position.
Claim 4
Dependent Claim
33 words
An assembly according to claim 1, wherein said means applying the force of said power assisting means to said brake pedal applies said force at said connection intermediate the ends of said pedal.
Claim 5
Dependent Claim
49 words
An assembly according to claim 1, including a cylinder, and a piston connected to said pedal and working in said cylinder, wherein said piston is subjected to the operating pressure of said power assisting means whereby in normal operation said first pivot point is held fixed by said piston.
Claim 6
Dependent Claim
28 words
An assembly according to claim 4, wherein said fixed fulcrum includes a fixed pivot, a bell-crank pivotable about said fixed pivot, and connecting said pedal to said piston.
Claim 7
Dependent Claim
157 words
A brake pedal assembly for actuating a master cylinder having power assisting means, comprising a brake pedal pivotable about a first movable pivot point, an actuating member having a pivotal connection with said brake pedal at a point intermediate the ends of said pedal and being movable with said pedal to actuate said master cylinder, means holding said pivot point in a fixed position during normal operation of said assembly, said brake pedal being pivotable about a different pivot point upon failure of said power assisting means, means for applying the force of said power assisting means to said brake pedal, a fixed fulcrum intermediate said first pivot point and said connection between said pedal and said actuating member, said pedal being engageable with said fulcrum in the failed condition of said power assisting means, and a bell-crank pivotable about said fixed pivot, and interconnecting said piston and said pedal said fixed pivot comprising said fixed fulcrum.
Claim 8
Dependent Claim
157 words
A brake pedal assembly for actuating a master cylinder having power assisting means, comprising a brake pedal pivotable about a first movable pivot point, an actuating member having a pivotal connection with said brake pedal at a point intermediate the ends of said pedal and being movable with said pedal to actuate said master cylinder, means holding said pivot point in a fixed position during normal operation of said assembly, said brake pedal being pivotable about a different pivot point upon failure of said power assisting means, means for applying the force of said power assisting means to said brake pedal, a fixed fulcrum intermediate said first pivot point and said connection between said pedal and said actuating member, said pedal being engageable with said fulcrum in the failed condition of said power assisting means, and a bell-crank pivotable about said fixed pivot, and interconnecting said piston and said pedal said fixed pivot comprising said fixed fulcrum.
Claim 9
Dependent Claim
30 words
An assembly according to claim 6, including spring means located within said cylinder and biasing said piston in a direction to hold said pivot point in its fixed first position.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |