US5152586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-locking hydraulic brake system
Assignee: Continental Teves AG and Co OHG
•
Filing: 1990-11-16
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Granted: 1992-10-06
•
Expires: 2010-11-16
Abstract
Abstract An ALC-system of the closed type is provided, with a throttle (27) switched in response to the filling level of the intermediate reservoir (9) inserted into the intake conduit between the intermediate reservoir (9) and a pump (10). This ensures damping of the pressure pulsation of the pedal and further ensures operation of the brake system for traction slip control operation.
Inventors
- 👤 Jochen Burgdorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:20
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/40; B60T8/404; B60T8/4059; B60T8/42; B60T8/4275; B60T8/4291; B60T8/48; B60T8/4809; B60T8/4827; B60T8/4863; B60T8/4872; Y; Y10; Y10S; Y10S303/00; Y10S303/11; Y10S303/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
267 words
An anti-locking and traction slip hydraulic brake system comprising: at least one hydraulically operated wheel brake; a master cylinder; hydraulic circuit means connecting said master cylinder to said wheel brake for operating said wheel brake; a brake pedal connected to said master cylinder to allow stroking of said master cylinder to operate said wheel brake; a pump having an inlet and an outlet, said outlet connected in said hydraulic circuit means to said wheel brake; an electrically operated inlet valve connected in said hydraulic circuit means to enable controlled closing communication between said wheel brake and both said master cylinder and said outlet of said pump; a return conduit connected to said wheel brake at a point in said hydraulic circuit means intermediate said inlet valve and said wheel brake; an accumulator including an expansible accumulator chamber connected by said hydraulic circuit means to be able to receive fluid out flow from said wheel brake via said return conduit; an electrically operated outlet valve connected in said return conduit to enable controlled closing of said return conduit; means connecting said accumulator chamber to said inlet of said pump, said last mentioned means including a first, substantially unrestricted passage, and a second passage having a throttle restriction therein; and, valve means opening said first passage upon a filling of said accumulator chamber to a predetermined level enable substantially unrestricted communication of said accumulator chamber with said pump inlet when said predetermined level is reached, and closing communication whenever said chamber is not filled to said predetermined level to substantially restrict communication between said chamber and said pump inlet.
Claim 2
Dependent Claim
267 words
An anti-locking and traction slip hydraulic brake system comprising: at least one hydraulically operated wheel brake; a master cylinder; hydraulic circuit means connecting said master cylinder to said wheel brake for operating said wheel brake; a brake pedal connected to said master cylinder to allow stroking of said master cylinder to operate said wheel brake; a pump having an inlet and an outlet, said outlet connected in said hydraulic circuit means to said wheel brake; an electrically operated inlet valve connected in said hydraulic circuit means to enable controlled closing communication between said wheel brake and both said master cylinder and said outlet of said pump; a return conduit connected to said wheel brake at a point in said hydraulic circuit means intermediate said inlet valve and said wheel brake; an accumulator including an expansible accumulator chamber connected by said hydraulic circuit means to be able to receive fluid out flow from said wheel brake via said return conduit; an electrically operated outlet valve connected in said return conduit to enable controlled closing of said return conduit; means connecting said accumulator chamber to said inlet of said pump, said last mentioned means including a first, substantially unrestricted passage, and a second passage having a throttle restriction therein; and, valve means opening said first passage upon a filling of said accumulator chamber to a predetermined level enable substantially unrestricted communication of said accumulator chamber with said pump inlet when said predetermined level is reached, and closing communication whenever said chamber is not filled to said predetermined level to substantially restrict communication between said chamber and said pump inlet.
Claim 3
Dependent Claim
63 words
An anti-locking hydraulic brake system according to claim 1 further including an additional conduit connecting said pump inlet to said master cylinder and a second electrically operated valve means in said additional conduit enabling communication of said pump inlet with said master cylinder in the event of traction slip control of said wheel brake to enable unrestricted intake of fluid into said pump.
Claim 4
Dependent Claim
35 words
An anti-locking hydraulic brake system according to claim 2 wherein said second valve means also cuts off communication of said master cylinder with said wheel brake whereby said pump can rapidly operate said wheel brake.
Claim 5
Dependent Claim
262 words
An anti-locking and traction slip hydraulic brake system comprising: at least one hydraulically operated wheel brake; a master cylinder; hydraulic circuit means connecting said master cylinder to said wheel brake for operating said wheel brake; a brake pedal connected to said master cylinder to allow stroking of said master cylinder to operate said wheel brake; a pump having an inlet and an outlet, said outlet connected in said hydraulic circuit means to said wheel brake; an electrically operated inlet valve connected in said hydraulic circuit means to enable controlled closing of communication between said wheel brake and both said master cylinder and said outlet of said pump; a return conduit connected to said wheel brake at a point in said hydraulic circuit means intermediate said inlet valve and said wheel brake; an accumulator including an expansible accumulator chamber connected by said hydraulic circuit means able to receive fluid out flow from said wheel brake via said return conduit; an electrically operated outlet valve connected in said return conduit to enable controlled closing of said return conduit; means connecting said accumulator chamber to said inlet of said pump, said last mentioned means including a passage having a throttle restriction therein substantially restricting fluid flow therethrough; a bypass conduit directly connecting said pump inlet to said master cylinder; and, electrically operated valve means in said bypass conduit opening said bypass conduit to enable substantially unrestricted communication of said master cylinder with said pump inlet whenever traction slip brake operation is activated, and closing said bypass conduit whenever said traction slip brake is not operated.
Claim 6
Dependent Claim
262 words
An anti-locking and traction slip hydraulic brake system comprising: at least one hydraulically operated wheel brake; a master cylinder; hydraulic circuit means connecting said master cylinder to said wheel brake for operating said wheel brake; a brake pedal connected to said master cylinder to allow stroking of said master cylinder to operate said wheel brake; a pump having an inlet and an outlet, said outlet connected in said hydraulic circuit means to said wheel brake; an electrically operated inlet valve connected in said hydraulic circuit means to enable controlled closing of communication between said wheel brake and both said master cylinder and said outlet of said pump; a return conduit connected to said wheel brake at a point in said hydraulic circuit means intermediate said inlet valve and said wheel brake; an accumulator including an expansible accumulator chamber connected by said hydraulic circuit means able to receive fluid out flow from said wheel brake via said return conduit; an electrically operated outlet valve connected in said return conduit to enable controlled closing of said return conduit; means connecting said accumulator chamber to said inlet of said pump, said last mentioned means including a passage having a throttle restriction therein substantially restricting fluid flow therethrough; a bypass conduit directly connecting said pump inlet to said master cylinder; and, electrically operated valve means in said bypass conduit opening said bypass conduit to enable substantially unrestricted communication of said master cylinder with said pump inlet whenever traction slip brake operation is activated, and closing said bypass conduit whenever said traction slip brake is not operated.
References Cited (Backward Citations)
US3521934A
Cited
US3550966A
Cited
US3756666A
Cited
US3715145A
Cited
US4099793A
Cited
JPS57160751A
Cited
GB2111149A
Cited
US4902077A
Cited
US4640558A
Cited
US4715667A
Cited
US4976501A
Cited
DE3541742A1
Cited
US4778222A
Cited
US4775196A
Cited
DE3612185A1
Cited
GB2195724A
Cited
US4844558A
Cited
US4894555A
Cited
US4807943A
Cited
GB2199385A
Cited
US4878715A
Cited
GB2214250A
Cited
US5007687A
Cited
US4898430A
Cited
US4952002A
Cited
DE3844246A1
Cited
US4940293A
Cited
US4900105A
Cited
GB2218479A
Cited
US4950038A
Cited
US4900102A
Cited
GB2224089A
Cited
US5013095A
Cited
US5013097A
Cited
US5058961A
Cited
US5033800A
Cited
GB2238836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |