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US3851930A Expired / Lapsed US ⏱️ 0.0 years remaining

Braking mechanism having an anti-locking system

Assignee: Automobiles Citroen SA
•
Filing: 1973-03-07
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Granted: 1974-12-03
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Expires: 1993-03-07
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Abstract

Abstract A braking mechanism having an anti-locking system for at least one wheel of a vehicle and comprised of a source of fluid under pressure controlled by the driver, brake operators to receive fluid and connected to a brake of the wheel, a valve having two positions controlled by a member detecting abnormal deceleration of the wheel and capable of connecting the fluid receiving members selectively to the source of fluid under pressure and with a first exhaust pipe including a flow-limiter and a first accumulator interposed between the valve and the flow-limiter. A second exhaust pipe is provided in parallel flow relationship to the first exhaust pipe about the flow-limiter. The second exhaust pipe is comprised of a valve member constituted by a moving member of a second accumulator permanently connected to the brake operators'' supply pipe between the controlled valve and the brake operators, which moving member opens the second exhaust pipe when the volume of fluid is minimal.

Inventors

  • 👤 A Grosseau

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 11:44
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 175 words
Improved braking mechanism having an anti-locking system for at least one wheel of a vehicle comprised of a source of fluid under pressure controlled by the driver, brake operator means receiving said fluid and connected to a brake of said wheel, a valve having two positions controlled by a means detecting abnormal deceleration of said wheel and able to place said brake operator means selectively in fluid communication with said source of fluid under pressure and with a first exhaust pipe including a flow-limiter and a first accumulator wherein said first accumulator is interposed between said control valve and said flow-limiter, the improvement characterized by a second exhaust pipe connected to said first exhaust pipe in parallel flow to said flow-limiter, said second pipe comprising a valve member constituted by a moving member of a second accumulator connected to a pipe supplying said brake operator means between said control valve and said brake operator means, said moving member being in a position to open the second pipe when the volume of said accumulator is minimal.
Claim 2
Dependent Claim 175 words
Improved braking mechanism having an anti-locking system for at least one wheel of a vehicle comprised of a source of fluid under pressure controlled by the driver, brake operator means receiving said fluid and connected to a brake of said wheel, a valve having two positions controlled by a means detecting abnormal deceleration of said wheel and able to place said brake operator means selectively in fluid communication with said source of fluid under pressure and with a first exhaust pipe including a flow-limiter and a first accumulator wherein said first accumulator is interposed between said control valve and said flow-limiter, the improvement characterized by a second exhaust pipe connected to said first exhaust pipe in parallel flow to said flow-limiter, said second pipe comprising a valve member constituted by a moving member of a second accumulator connected to a pipe supplying said brake operator means between said control valve and said brake operator means, said moving member being in a position to open the second pipe when the volume of said accumulator is minimal.
Claim 3
Dependent Claim 99 words
The device as defined by claim 1 wherein said second accumulator is comprised of a cylindrical hollow body and wherein said moving member is a piston slidably mounted in said body and defining a chamber with said body, said chAmber being connected to said pipe supplying said brake operator means between said control valve and said brake operator means said second accumulator including a spring member means disposed between said piston and said body, said spring member means tending to keep said piston in a position opening said second pipe to maintain the volume of the said chamber minimal.
Claim 4
Dependent Claim 29 words
The device as defined by claim 2, wherein said first accumulator is emptied by means of a valve having two positions defined by the positions of said controlled valve.
Claim 5
Dependent Claim 20 words
The device as defined by claim 3 wherein said first accumulator is provided by a piston of said second accumulator.

References Cited (Backward Citations)

US2759570A Cited
US3521934A Cited
US3514162A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-12-02 1978-06-03 1978-12-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-12-02 1982-06-03 1982-12-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-12-02 1986-06-03 1986-12-03 $7700.00 Window Closed / Lapsed

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