US3556466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid mechanism
Assignee: Wagner Electric Corp
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Filing: 1969-05-08
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Granted: 1971-01-19
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Expires: 1989-05-08
Abstract
Abstract An antiskid device is provided with a control valve actuated in response to signals from a sensing mechanism of impending vehicle skid conditions to respectively subject a control member to atmosphere and selectively subject said control member to vacuum for controlling the application of supplied fluid pressure to the vehicle brakes, and a resiliently urged member is provided for disabling said control member in the event the vacuum is lost.
Inventors
- 👤 John A Machek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:50
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4241; B60T8/425
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
An antiskid device comprising a housing, means movable in said housing for controlling the application therethrough of supplied fluid pressure including other means for selective subjection to a control differential fluid pressure, said other means being responsive to the control differential fluid pressure when selectively subjected thereto to urge said first named means toward a communicating position in said housing effecting the application therethrough of the supplied fluid pressure, and disabling means normally subjected to the control differential fluid pressure and movable in said housing for driving engagement with said first named means, said disabling means being normally urged toward an inoperative position in said housing in response to the control differential fluid pressure acting thereon and being movable in the event of the loss of the control differential fluid pressure to engage and drive said first named means toward its communicating position.
Claim 2
Dependent Claim
143 words
An antiskid device comprising a housing, means movable in said housing for controlling the application therethrough of supplied fluid pressure including other means for selective subjection to a control differential fluid pressure, said other means being responsive to the control differential fluid pressure when selectively subjected thereto to urge said first named means toward a communicating position in said housing effecting the application therethrough of the supplied fluid pressure, and disabling means normally subjected to the control differential fluid pressure and movable in said housing for driving engagement with said first named means, said disabling means being normally urged toward an inoperative position in said housing in response to the control differential fluid pressure acting thereon and being movable in the event of the loss of the control differential fluid pressure to engage and drive said first named means toward its communicating position.
Claim 3
Dependent Claim
76 words
An antiskid device according to claim 1, wherein said disabling means includes resiliently urged means, said resiliently urged means being urged against its own force toward the inoperative position in response to the control differential fluid pressure acting thereon, and said resiliently urged means being movable in response to its own force to engage and drive said first named means toward it communicating position in the event of the loss of the control differential fluid pressure.
Claim 4
Dependent Claim
99 words
An antiskid device according to claim 2, wherein said resiliently urged means includes diaphragm means movable in said housing, resilient means urging said diaphragm means toward driving engagement with said first named means, said diaphragm means being movable against said resilient means toward the inoperative position in response to the control differential fluid pressure acting thereon, and the force of said resilient means urging said diaphragm means into driving engagement with said first named means to urge said first named means toward first communicating position upon the loss of the control differential fluid pressure acting on said diaphragm means.
Claim 5
Dependent Claim
102 words
An antiskid device according to claim 3, comprising a pair of opposed chambers in said housing, said diaphragm means being movable between said chambers, one of said chambers being subjected to the atmosphere and the other of said chambers being normally subjected to vacuum to define the control differential fluid pressure acting on said diaphragm means and urging said diaphragm means toward the inoperative position, and said resilient means being disposed in said other chamber, the force of said resilient means urging said diaphragm means toward driving engagement with said first named means upon the loss of vacuum in said other chamber.
Claim 6
Dependent Claim
28 words
An antiskid device according to claim 4, wherein said resilient means includes at least one spring in said other chamber biased between said diaphragm means and said housing.
Claim 7
Dependent Claim
51 words
An antiskid device according to claim 4, comprising venting means extending through said other chamber and having opposed portions sealably engaged with said diaphragm means and movablE in said housing, respectively, and a venting passage in said venting means between said opposed portions for subjecting said one chamber to the atmosphere.
Claim 8
Dependent Claim
76 words
An antiskid device according to claim 4, comprising aperture means in said diaphragm means, a bore in said housing substantially aligned with said aperture means, said venting means including piston means and said opposed portions being on said piston means, one of said opposed portions extending through said aperture means in sealing engagement therewith and the other of said opposed portions being slidable in said housing bore, and said venting passage being in said piston means.
Claim 9
Dependent Claim
51 words
An antiskid device according to claim 1, wherein said other means includes diaphragm means movable in said housing for engagement with said first named means, said diaphragm means being responsive to the control differential fluid pressure acting thereon when subjected thereto to urge said first named means toward its communicating position.
Claim 10
Dependent Claim
87 words
An antiskid device according to claim 8, comprising a pair of opposed chambers in said housing, said diaphragm means being movable between said chambers, one of said chambers being subjected to the atmosphere and the other of said chambers being selectively subjected to the atmosphere and vacuum, the control differential fluid pressure being defined by the atmosphere in said one chamber and the vacuum in said other chamber when subjected thereto and acting on said diaphragm means to urge said first named means toward its communicating position.
Claim 11
Dependent Claim
144 words
An antiskid device according to claim 4, wherein said other means includes another diaphragm means movable in said housing and defining with said first named diaphragm means said one chamber, said other diaphragm means also defining with said housing a third chamber opposed to said one chamber for selective subjection to the atmosphere and vacuum, said control differential fluid pressure being defined by the atmosphere in said one chamber and the vacuum in said third chamber when subjected thereto acting on said other diaphragm means to urge said first named means toward its communicating position, and said other diaphragm means being driven by said first named diaphragm means in response to the force of said resilient means to urge said first named means toward its communicating position in the event of the loss of vacuum acting on said first named and other diaphragm means.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |