US3741612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid brake system
Assignee: Aisin Corp
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Filing: 1972-06-16
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Granted: 1973-06-26
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Expires: 1992-06-16
Abstract
Abstract An anti-skid brake system for the vehicle wheel which acts to limit, decrease, and permit subsequent increase of the brake application pressure in accordance with the generation of skid sensing signals, the brake system comprising a throttle means for controlling the pneumatic pressure supply to a servomotor assembly whereby the initial movement of the brake pressure reducing operation is started substantially simultaneously with generation of the skid sensing signal, while the brake pressure is subsequently reduced with a suitable decreasing ratio.
Inventors
- 👤 M Ando
- 👤 Seiki K K Aisin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:36
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: 9
Claim 1
Independent Claim
232 words
An anti-skid brake system for vehicle brake wheels comprising: a master cylinder generating fluid pressure; wheel brakes actuated by said fluid pressure; means for generating a skid sensing signal; a change over valve assembly actuated by said skid sensing signal and associated with an atmosphere and a vacuum source for controlling the flow of the atmospheric air and vacuum; a cut off valve assembly interposed between said master cylinder and wheel brakes and including a check ball to control the fluid communication therebetween; a hydraulic pressure reducing assembly interposed between said master cylinder and wheel brakes and including a housing, and a piston slidably fitted in said housing; a pneumatic servomotor assembly associated with said reducing assembly and including a housing, a first chamber connected to said change over assembly, a second chamber connected to said vacuum source, a power wall defining said first and second chambers and operatively connected to said piston of the reducing assembly, said piston being slidable in accordance with the atmospheric air supply to said first chamber; and throttle means interposed between said first chamber and said change over valve assembly and including a first passage and a second passage, said first passage being decreasingly varied in accordance with the atmospheric air supply to said First chamber and the atmospheric air being supplied only through said second passage after a predetermined value of the atmospheric air supply.
Claim 2
Dependent Claim
232 words
An anti-skid brake system for vehicle brake wheels comprising: a master cylinder generating fluid pressure; wheel brakes actuated by said fluid pressure; means for generating a skid sensing signal; a change over valve assembly actuated by said skid sensing signal and associated with an atmosphere and a vacuum source for controlling the flow of the atmospheric air and vacuum; a cut off valve assembly interposed between said master cylinder and wheel brakes and including a check ball to control the fluid communication therebetween; a hydraulic pressure reducing assembly interposed between said master cylinder and wheel brakes and including a housing, and a piston slidably fitted in said housing; a pneumatic servomotor assembly associated with said reducing assembly and including a housing, a first chamber connected to said change over assembly, a second chamber connected to said vacuum source, a power wall defining said first and second chambers and operatively connected to said piston of the reducing assembly, said piston being slidable in accordance with the atmospheric air supply to said first chamber; and throttle means interposed between said first chamber and said change over valve assembly and including a first passage and a second passage, said first passage being decreasingly varied in accordance with the atmospheric air supply to said First chamber and the atmospheric air being supplied only through said second passage after a predetermined value of the atmospheric air supply.
Claim 3
Dependent Claim
60 words
An anti-skid brake system as set forth in claim 1, wherein a spring is interposed between said housing of the reducing assembly and said throttle means, and said throttle means is mounted on said power wall to follow the movement of said power wall with the biasing force of said spring, thereby controlling the flow amount of the atmospheric air.
Claim 4
Dependent Claim
29 words
An anti-skid brake system as set forth in claim 2, wherein said throttle means is of a cylindrical shape and slidably mounted upon said housing of the reducing assembly.
Claim 5
Dependent Claim
70 words
An anti-skid brake system as set forth in claim 3, wherein said throttle means comprises an annular shoulder and said housing of the pneumatic servomotor assembly is provided with a through hole normally connected to said first chamber and said change over valve assembly, whereby a clearance between said shoulder and said housing of the pneumatic servometer assembly constitutes said first passage and said through hole constitutes said second passage.
Claim 6
Dependent Claim
43 words
An anti-skid brake system as set forth in claim 1, further comprising a smaller servomotor assembly which includes a housing, a rod mounted in said housing and operatively connected to said cut off valve assembly, and switch means operatively connected to said rod.
Claim 7
Dependent Claim
40 words
An anti-skid brake system as set forth in claim 5, wherein said throttle means comprises a housing, a solenoid electrically connected to said switch means, and a valve piston fitted in said housing and movable by energization of said solenoid.
Claim 8
Dependent Claim
73 words
An anti-skid brake system as set forth in claim 6, wherein said smaller servomotor assembly further comprises a first chamber connected to said first chamber of said first mentioned servomotor assembly, a second chamber connected to said vacuum source, a through hole provided on said throttle means housing and normally connected to said first and second chambers of the smaller servomotor assembly, and a power wall defining said first and second chambers thereof.
Claim 9
Dependent Claim
82 words
An anti-skid brake system as claimed in claim 6, wherein said smaller servo assembly further comprises a single chamber, said rod being passed through said single chamber, one end of said rod being kept in contact with said power wall, the other end thereof being operatively connected to said switch means, a spring urging said rod to move toward said power wall, whereby upon movement of said power wall said rod is moved to actuate said switch means thereby energizing said solenoid.
References Cited (Backward Citations)
US3685867A
Cited
US3703320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |