Patent US3851929A successfully refreshed from Google Patents.
US3851929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking mechanism tending to eliminate locking
Assignee: Automobiles Citroen SA
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Filing: 1973-03-07
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Granted: 1974-12-03
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Expires: 1993-03-07
Abstract
Abstract An anti-locking braking system for the wheel of a motor vehicle having a distributor with a slide which in one attitude permits fluid at full braking pressure to immediately enter the brake cylinder, but after a device detecting locking has operated so that the cylinder is exhausted, exhaust fluid is bled to the distributor to move the slide to a second attitude which routes the supply of pressurized fluid to the cylinder via a flowlimiter whereby the pressure rise in the cylinder increases progressively provided the brake pedal remains depressed.
Inventors
- 👤 A Grosseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:24
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/50; B60T8/5018; B60T8/5025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
266 words
An anti-locking braking assembly for a vehicle which comprises: a source of fluid under pressure; a receiving member means coupled to a brake of a wheel of said vehicle; a sensing means detecting the dynamic state of said wheel; a first conduit means including a control valve means responsive to said sensing means, said control valve means having an exhaust conduit means, said first conduit means capable of placing said receiving member means in fluid communication with said source of pressurized fluid via said control valve means; a distributor means having two positions, said distributor means being disposed in said first conduit means between said control valve means and said receiving member means and dividing said first conduit means into first and second portion means, said first portion means extending from said control valve means to said distributor means, said second portion means extending from said distributor means to said receiving member means, said distributor means comprising first and second guide means said first guide means enabling said distributor means to maintain a first stable position to provide fluid communication between said first and second portion means, said second guide means enabling said distributor to maintain a second stable position whereby fluid communication between said portion means is interrupted upon detection by said sensing means of an abnormal state of said wheel as long as the pressure of said fluid is not appreciably decreased; and a second conduit means including a fluid flow limiter means connecting said first and second portion means of said first conduit means in shunt relationship with respect to said distributor means.
Claim 2
Dependent Claim
266 words
An anti-locking braking assembly for a vehicle which comprises: a source of fluid under pressure; a receiving member means coupled to a brake of a wheel of said vehicle; a sensing means detecting the dynamic state of said wheel; a first conduit means including a control valve means responsive to said sensing means, said control valve means having an exhaust conduit means, said first conduit means capable of placing said receiving member means in fluid communication with said source of pressurized fluid via said control valve means; a distributor means having two positions, said distributor means being disposed in said first conduit means between said control valve means and said receiving member means and dividing said first conduit means into first and second portion means, said first portion means extending from said control valve means to said distributor means, said second portion means extending from said distributor means to said receiving member means, said distributor means comprising first and second guide means said first guide means enabling said distributor means to maintain a first stable position to provide fluid communication between said first and second portion means, said second guide means enabling said distributor to maintain a second stable position whereby fluid communication between said portion means is interrupted upon detection by said sensing means of an abnormal state of said wheel as long as the pressure of said fluid is not appreciably decreased; and a second conduit means including a fluid flow limiter means connecting said first and second portion means of said first conduit means in shunt relationship with respect to said distributor means.
Claim 3
Dependent Claim
45 words
The anti-locking braking assembly as defined in claim 1 including a third conduit means having a non-return valve means, said third conduit means connecting said second conduit means between said flow limiter means thereof to facilitate the passage of fluid from said cylinder member means.
Claim 4
Dependent Claim
40 words
The anti-locking braking assembly as defined in claim 2 wherein said slide is provided with a groove to provide fluid communication between said first and second portions of said first conduit means when said slide is in said first position.
Claim 5
Dependent Claim
183 words
The anti-locking braking assembly as defined in claim 2 wherein said distributor means is comprised of a rigid cylindrical hollow body, a slide movably positioned therein, and a spring means disposed within said body between said body and said slide, said slide having a piston means defining a chamber with said body, said chamber being capable of being placed in fluid communication with a source of fluid under pressure, whereby the action of said fluid on said piston means is opposed to the compressional force of said spring means and whereby said chamber is filled with fluid when the pressure of fluid is greater than the compressional force of said spring means, said slide maintaining a first position to permit the passage of fluid between said first and second portion means when the pressure of fluid in said chamber is less than the compressional force of said spring, said slide maintaining a second position to interrupt fluid communication between said first and second portion means when the pressure of fluid in said chamber is greater than the compressional force of said spring means.
Claim 6
Dependent Claim
86 words
The anti-locking braking assembly as defined in claim 4 wherein a second piston means is provided to define a second chamber and wherein said slide is formed with channel means, said first chamber being in fluid communication with said exhaust conduit means by a fourth conduit means including a non-return valve means, when said slide is in said first position, and wherein said second chamber is in fluid communication with said first conduit means by said channel means when said slide is in said second position.
Claim 7
Dependent Claim
35 words
The anti-locking braking assembly as defined in claim 5 wherein said channels are in fluid communication with a second exhaust conduit means including a flow limiting means when said slide is in said first position.
Claim 8
Dependent Claim
56 words
The anti-locking braking assembly as defined in claim 4 wherein said slide is formed with channel means, said chamber being in fluid communication with said exhaust conduit means by a third conduit means including a non-return valve means and with said first conduit means by said channel means when said slide is in said second position.
Claim 9
Dependent Claim
35 words
The anti-locking braking assembly as defined in claim 7 wherein said channels are in fluid communication with a second exhaust conduit means including a flow limiting means when said slide is in said 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) | 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 |