Patent US3836208A successfully refreshed from Google Patents.
US3836208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid control system
Assignee: TDK Micronas GmbH
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Filing: 1972-10-25
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Granted: 1974-09-17
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Expires: 1992-10-25
Abstract
Abstract This invention relates to a hydraulic arrangement for an antiskid system employed in a two circuit brake system where each of the two brake circuits control the wheels of a single axle. The hydraulic arrangement includes a plunger unit having a spring-like actuated control element in one of the two brake circuits and a purely hydraulically controlled plunger unit in the other of the two brake circuits. The control chambers of the two plunger units are hydraulically connected in series so that the plunger units operate together particularly in an antiskid control cycle. The arrangement is light-weight, space and cost saving and safe with regards to its antiskid operation while the sense and purpose of the two-circuit braked axle is completely maintained.
Inventors
- 👤 F Wienecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:41
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/4233; B60T8/343; B60T8/344; B60T8/345; Y; Y10; Y10S; Y10S303/00; Y10S303/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
249 words
An antiskid control system for a motor vehicle having two brake circuits in which a control value determined by a wheel rotation sensor actuates said brake circuits each having at least one plunger unit such that the braked wheel does not lock comprising: a first plunger unit having a spring-like actuated control element and a first control chamber disposed in one of said brake circuits; a second hydraulically controlled plunger unit having a second control chamber disposed in the other of said brake circuits; said first and second control chambers being directly connected in series; a master cylinder; a separating valve coupled between said master cylinder and said first plunger unit; first wheel brake cylinders coupled to said first plunger unit; the brake medium of said first wheel brake cylinders being released by volume expansion upon controlled movement in one direction of a first plunger disposed in said first plunger unit defining said first control chamber; second wheel brake cylinders coupled to said second plunger unit; the brake medium of said second wheel brake cylinders being controlled by controlled movement in both directions of a second plunger disposed in said second plunger unit defining said second control chamber; a pressure medium accumulator; a return line; an input valve closed in rest position and controlled by said control value disposed between said first chamber and said accumulator; and an output valve open in rest position and controlled by said control value disposed between said first chamber and said return line.
Claim 2
Dependent Claim
249 words
An antiskid control system for a motor vehicle having two brake circuits in which a control value determined by a wheel rotation sensor actuates said brake circuits each having at least one plunger unit such that the braked wheel does not lock comprising: a first plunger unit having a spring-like actuated control element and a first control chamber disposed in one of said brake circuits; a second hydraulically controlled plunger unit having a second control chamber disposed in the other of said brake circuits; said first and second control chambers being directly connected in series; a master cylinder; a separating valve coupled between said master cylinder and said first plunger unit; first wheel brake cylinders coupled to said first plunger unit; the brake medium of said first wheel brake cylinders being released by volume expansion upon controlled movement in one direction of a first plunger disposed in said first plunger unit defining said first control chamber; second wheel brake cylinders coupled to said second plunger unit; the brake medium of said second wheel brake cylinders being controlled by controlled movement in both directions of a second plunger disposed in said second plunger unit defining said second control chamber; a pressure medium accumulator; a return line; an input valve closed in rest position and controlled by said control value disposed between said first chamber and said accumulator; and an output valve open in rest position and controlled by said control value disposed between said first chamber and said return line.
Claim 3
Dependent Claim
23 words
A system according to claim 1, wherein said two brake circuits are connected to each wheel of one axle of said motor vehicle.
Claim 4
Dependent Claim
64 words
A system according to claim 1, wherein two sets of said first and second plunger units are provided, one set of said first and second plunger units being provided for one wheel of one axle of said motor vehicle and the other set of said first and second plunger units being provided for the other wheel of said one axle of said motor vehicle.
Claim 5
Dependent Claim
35 words
A system according to claim 1, further including a third control chamber disposed in said second plunger unit defined by said second plunger opposite to said second control chamber constantly directly connected to said accumulator.
Claim 6
Dependent Claim
34 words
A system according to claim 4, wherein the actuating surface of said second plunger defining said third control chamber is smaller than the annular surface of said second plunger defining said second control chamber.
Claim 7
Dependent Claim
23 words
A system according to claim 5, wherein said two brake circuits are connected to each wheel of one axle of said motor vehicle.
Claim 8
Dependent Claim
64 words
A system according to claim 5, wherein two sets of said first and second plunger units are provided, one set oF said first and second plunger units being provided for one wheel of one axle of said motor vehicle and the other set of said first and second plunger units being provided for the other wheel of said one axle of said motor vehicle.
References Cited (Backward Citations)
US3532391A
Cited
US3667811A
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US3708213A
Cited
US3682513A
Cited
US3682514A
Cited
US3677608A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |