Patent US5213399A successfully refreshed from Google Patents.
US5213399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-lock hydraulic brake system
Assignee: Individual
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Filing: 1990-09-08
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Granted: 1993-05-25
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Expires: 2010-09-08
Abstract
Abstract A brake system is presented wherein a pump receives the pressure fluid that is discharged out of the wheel brakes during a control action and supplies it into a high-pressure accumulator. Further, there is provision of a separating valve which closes the brake line during a brake slip control action. The separating valve is actuated mechanically, and namely by the accumulator piston of the high-pressure accumulator. The advantage thereof is that the force of the greatly biased accumulator spring is available for cracking the separating valve open. It is thus ensured in any case that the separating valve is re-opened after a slip-controlled braking operation and renewed braking of the vehicle is possible.
Inventors
- 👤 Jochen Burgdorf
- 👤 Eugen Haselwanter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:51
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4275; B60T8/4291; Y; Y10; Y10S; Y10S303/00; Y10S303/11; Y10S303/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
831 words
An anti-lock hydraulic brake system for a vehicle having two front wheels and two rear wheels, said brake system comprising: a master cylinder; four wheel brakes, one associated with each wheel of a vehicle having two front wheels and two rear wheels; a first brake circuit comprising: (a) first fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two front wheels, said first fluid flow means including: (1) a first separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) first fluid control means for selectively: (1) conducting fluid from said inlet chamber of said first separating valve to said wheel brakes associated with said two front wheels, and (2) preventing fluid from leaving said inlet chamber of said first separating valve to said wheel brakes associated with said two front wheels, (2) a first inlet valve through which fluid from said inlet chamber of said first separating valve is selectively conducted to a first of said wheel brakes associated with said two front wheels, (3) a second inlet valve through which fluid from said inlet chamber of said first separating valve selectively conducted to a second of said wheel brakes associated with said two front wheels, (b) second fluid flow means for conducting fluid from said wheel brakes associated with said two front wheels, said second fluid flow means including: (1) a first outlet valve through which fluid from a first of said wheel brakes associated with said two front wheels is selectively conducted, (2) a second outlet valve through which fluid from a second of said wheel brakes associated with said two front wheels is selectively conducted, (3) a first high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two front wheels is supplied, and (ii) second fluid control means responsive to the pressure of fluid supplied to said storage chamber of said first high-pressure accumulator for controlling said first fluid control means to: (1) permit fluid in said inlet chamber of said first separating valve to be conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said first high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said first separating valve from being conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said first high-pressure accumulator is above said predetermined level, and (c) first fluid drive means for driving fluid from said wheel brakes associated with said two front wheels and passing through said first and said second outlet valves to said storage chamber of said first high-pressure accumulator; and a second brake circuit comprising: (a) third fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two rear wheels, said third fluid flow means including: (1) a second separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) third fluid control means for selectively: (1) conducting fluid from said inlet chamber of said second separating valve to said wheel brakes associated with said two rear wheels, and (2) preventing fluid from leaving said inlet chamber of said second separating valve to said wheel brakes associated with said two rear wheels, (b) a third inlet valve through which fluid from said inlet chamber of said second separating valve is selectively conducted to said wheel brakes associated with said two rear wheels, and (c) fourth fluid flow means for conducting fluid from said wheel brakes associated with said two rear wheels, said fourth fluid flow means including: (1) a third outlet valve through which fluid from said wheel brakes associated with said two rear wheels is selectively conducted, (2) a second high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two rear wheels is supplied, and (ii) fourth fluid control means responsive to the pressure of fluid supplied to said storage chamber of said second high-pressure accumulator for controlling said third fluid control means to: (1) permit fluid in said inlet chamber of said second separating valve to be conducted to said wheel brakes associated with said two rear wheels when the pressure of any fluid in said storage chamber of said second high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said second separating valve from being conducted to said wheel brakes associated with said two rear wheels when the pressure of any fluid in said storage chamber of said second high-pressure accumulator is above said predetermined level, and (3) second fluid drive means for driving fluid from said wheel brakes associated with said two rear wheels and passing through said third outlet valve to said storage chamber of said second high-pressure accumulator.
Claim 2
Dependent Claim
831 words
An anti-lock hydraulic brake system for a vehicle having two front wheels and two rear wheels, said brake system comprising: a master cylinder; four wheel brakes, one associated with each wheel of a vehicle having two front wheels and two rear wheels; a first brake circuit comprising: (a) first fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two front wheels, said first fluid flow means including: (1) a first separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) first fluid control means for selectively: (1) conducting fluid from said inlet chamber of said first separating valve to said wheel brakes associated with said two front wheels, and (2) preventing fluid from leaving said inlet chamber of said first separating valve to said wheel brakes associated with said two front wheels, (2) a first inlet valve through which fluid from said inlet chamber of said first separating valve is selectively conducted to a first of said wheel brakes associated with said two front wheels, (3) a second inlet valve through which fluid from said inlet chamber of said first separating valve selectively conducted to a second of said wheel brakes associated with said two front wheels, (b) second fluid flow means for conducting fluid from said wheel brakes associated with said two front wheels, said second fluid flow means including: (1) a first outlet valve through which fluid from a first of said wheel brakes associated with said two front wheels is selectively conducted, (2) a second outlet valve through which fluid from a second of said wheel brakes associated with said two front wheels is selectively conducted, (3) a first high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two front wheels is supplied, and (ii) second fluid control means responsive to the pressure of fluid supplied to said storage chamber of said first high-pressure accumulator for controlling said first fluid control means to: (1) permit fluid in said inlet chamber of said first separating valve to be conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said first high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said first separating valve from being conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said first high-pressure accumulator is above said predetermined level, and (c) first fluid drive means for driving fluid from said wheel brakes associated with said two front wheels and passing through said first and said second outlet valves to said storage chamber of said first high-pressure accumulator; and a second brake circuit comprising: (a) third fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two rear wheels, said third fluid flow means including: (1) a second separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) third fluid control means for selectively: (1) conducting fluid from said inlet chamber of said second separating valve to said wheel brakes associated with said two rear wheels, and (2) preventing fluid from leaving said inlet chamber of said second separating valve to said wheel brakes associated with said two rear wheels, (b) a third inlet valve through which fluid from said inlet chamber of said second separating valve is selectively conducted to said wheel brakes associated with said two rear wheels, and (c) fourth fluid flow means for conducting fluid from said wheel brakes associated with said two rear wheels, said fourth fluid flow means including: (1) a third outlet valve through which fluid from said wheel brakes associated with said two rear wheels is selectively conducted, (2) a second high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two rear wheels is supplied, and (ii) fourth fluid control means responsive to the pressure of fluid supplied to said storage chamber of said second high-pressure accumulator for controlling said third fluid control means to: (1) permit fluid in said inlet chamber of said second separating valve to be conducted to said wheel brakes associated with said two rear wheels when the pressure of any fluid in said storage chamber of said second high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said second separating valve from being conducted to said wheel brakes associated with said two rear wheels when the pressure of any fluid in said storage chamber of said second high-pressure accumulator is above said predetermined level, and (3) second fluid drive means for driving fluid from said wheel brakes associated with said two rear wheels and passing through said third outlet valve to said storage chamber of said second high-pressure accumulator.
Claim 3
Dependent Claim
515 words
An anti-lock hydraulic brake system for a vehicle having two front wheels and two rear wheels, said brake system comprising: a master cylinder; four wheel brakes, one associated with each wheel of a vehicle having two front wheels and two rear wheels; a first brake circuit comprising: (a) first fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two front wheels, said first fluid flow means including: (1) a separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) first fluid control means for selectively: (1) conducting fluid from said inlet camber of said separating valve to said wheel brakes associated with said two front wheels, and (2) preventing fluid from leaving said inlet chamber of said separating valve to said wheel brakes associated with said two front wheels, (2) a first inlet valve through which fluid from said inlet chamber of said separating valve is selectively conducted to a first of said wheel brakes associated with said two front wheels, (3) a second inlet valve through which fluid from said inlet chamber of said separating valve is selectively conducted to a second of said wheel brakes associated with said two front wheels, (b) second fluid flow means for conducting fluid from said wheel brakes associated with said two front wheels, said second fluid flow means including: (1) a first outlet valve through which fluid from a first of said wheel brakes associated with said two front wheels is selectively conducted, (2) a second outlet valve through which fluid from a second of said wheel brakes associated with said two front wheels is selectively conducted, (3) a high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two front wheels is supplied, and (ii) second fluid control means responsive to the pressure of fluid supplied to said storage chamber of said high-pressure accumulator for controlling said first fluid control means to: (1) permit fluid in said inlet chamber of said separating valve to be conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said separating valve from being conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said high-pressure accumulator is above said predetermined level, and (c) fluid drive means for driving fluid from said wheel brakes associated with said two front wheels and passing through said first and said second outlet valves to said storage chamber of said high-pressure accumulator; and a second brake circuit comprising: (a) a supply valve through which fluid from said master cylinder is selectively conducted to said wheel brakes associated with said two rear wheels, (b) a low-pressure accumulator, and (c) a drain valve through which fluid from said wheel brakes associated with said two rear wheels is selectively conducted to said low-pressure accumulator.
Claim 4
Dependent Claim
515 words
An anti-lock hydraulic brake system for a vehicle having two front wheels and two rear wheels, said brake system comprising: a master cylinder; four wheel brakes, one associated with each wheel of a vehicle having two front wheels and two rear wheels; a first brake circuit comprising: (a) first fluid flow means for conducting fluid from said master cylinder to said wheel brakes associated with said two front wheels, said first fluid flow means including: (1) a separating valve having: (i) inlet chamber to which fluid from said master cylinder is conducted, and (ii) first fluid control means for selectively: (1) conducting fluid from said inlet camber of said separating valve to said wheel brakes associated with said two front wheels, and (2) preventing fluid from leaving said inlet chamber of said separating valve to said wheel brakes associated with said two front wheels, (2) a first inlet valve through which fluid from said inlet chamber of said separating valve is selectively conducted to a first of said wheel brakes associated with said two front wheels, (3) a second inlet valve through which fluid from said inlet chamber of said separating valve is selectively conducted to a second of said wheel brakes associated with said two front wheels, (b) second fluid flow means for conducting fluid from said wheel brakes associated with said two front wheels, said second fluid flow means including: (1) a first outlet valve through which fluid from a first of said wheel brakes associated with said two front wheels is selectively conducted, (2) a second outlet valve through which fluid from a second of said wheel brakes associated with said two front wheels is selectively conducted, (3) a high-pressure accumulator having: (i) a storage chamber to which fluid from said wheel brakes associated with said two front wheels is supplied, and (ii) second fluid control means responsive to the pressure of fluid supplied to said storage chamber of said high-pressure accumulator for controlling said first fluid control means to: (1) permit fluid in said inlet chamber of said separating valve to be conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said high-pressure accumulator is below a predetermined level, and (2) prevent fluid in said inlet chamber of said separating valve from being conducted to said wheel brakes associated with said two front wheels when the pressure of any fluid in said storage chamber of said high-pressure accumulator is above said predetermined level, and (c) fluid drive means for driving fluid from said wheel brakes associated with said two front wheels and passing through said first and said second outlet valves to said storage chamber of said high-pressure accumulator; and a second brake circuit comprising: (a) a supply valve through which fluid from said master cylinder is selectively conducted to said wheel brakes associated with said two rear wheels, (b) a low-pressure accumulator, and (c) a drain valve through which fluid from said wheel brakes associated with said two rear wheels is selectively conducted to said low-pressure accumulator.
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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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |