US4902077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic brake system
Assignee: Continental Teves AG and Co OHG
•
Filing: 1984-06-26
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Granted: 1990-02-20
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Expires: 2004-06-26
Abstract
Abstract A hydraulic brake system with slip control wherein at least one wheel brake (11) of an automotive vehicle is connected to a master cylinder (1). A normally opened inlet valve (8) which is adapted to be switched into a closed position is inserted in the connection between the master cylinder (1) and the wheel brake (11). The supply reservoir (6) of the master cylinder (1) contains an opening (13) which can be tightly closed by a filling device. To speed up the filling procedure of like brake systems, an additional connection is established between the supply reservoir (6) and the wheel brake (11) which is controllable by a valve (15). A like arrangement accelerates the venting and filling procedure, since the inlet valve (8) and its throttling action are by-passed.
Inventors
- 👤 Juan Belart
- 👤 Werner Volkmar
- 👤 Bernd Schuett
- 👤 Peter Stahlheber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; B60T17/22; B60T17/221; B60T17/222; B60T8/00; B60T8/32; B60T8/34; B60T8/341; B60T8/44; B60T8/445; F; F16; F16D; F16D2125/00; F16D2125/02; F16D2125/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
A hydraulic brake system with slip control, wherein at least one wheel brake of an automotive vehicle is connected to a master cylinder, wherein a normally opened inlet valve is inserted in the connection between the master cylinder and the wheel brake, said inlet valve adapted to be switched into a closed position, and wherein the supply reservoir of the master cylinder includes an opening tightly closed by a filling device, wherein a connection is established between the supply reservoir (6) and the wheel brake (11) which is controlled by a first directional control valve (15), said first valve (15) having a control input responsive to hydraulic pressure in said supply reservoir (6) to switch said first valve (15) between open and closed positions and being arranged in said brake system to by-pass said inlet valve.
Claim 2
Dependent Claim
136 words
A hydraulic brake system with slip control, wherein at least one wheel brake of an automotive vehicle is connected to a master cylinder, wherein a normally opened inlet valve is inserted in the connection between the master cylinder and the wheel brake, said inlet valve adapted to be switched into a closed position, and wherein the supply reservoir of the master cylinder includes an opening tightly closed by a filling device, wherein a connection is established between the supply reservoir (6) and the wheel brake (11) which is controlled by a first directional control valve (15), said first valve (15) having a control input responsive to hydraulic pressure in said supply reservoir (6) to switch said first valve (15) between open and closed positions and being arranged in said brake system to by-pass said inlet valve.
Claim 3
Dependent Claim
32 words
A hydraulic brake system as claimed in claim 1, wherein the valve (15) is adapted to be switched to a closed position by a pre-determined hydraulic pressure in the supply reservoir (6).
Claim 4
Dependent Claim
37 words
A hydraulic brake system as claimed in claim 2, wherein the valve (15) is switched to assume a stable closed position when an amount of pressure of greater than 4 bar prevails in the supply reservoir (6).
Claim 5
Dependent Claim
44 words
A hydraulic brake system as claimed in claim 3, wherein the valve (15) includes a piston (35) which is acted upon by atmospheric pressure on one face thereof, while a second end face thereof is exposed to the pressure in the supply reservoir (6).
Claim 6
Dependent Claim
30 words
A hydraulic brake system as claimed in claim 4. wherein the second end face of the piston (35) is movable into abutment on the valve housing, with the valve opened.
Claim 7
Dependent Claim
57 words
A hydraulic brake system as claimed in claim 4, wherein the piston (35) comprises two end portions (36, 37) of larger diameter and a mid-portion (38) of smaller diameter, one end portion (37) thereof being sealedly guided in a bore (34), while a closure member of the valve (15) is shaped at the other end portion (36).
Claim 8
Dependent Claim
28 words
A hydraulic brake system as claimed in claim 6, wherein the bore (34) is part of an insert sleeve (33) at which a valve seat (41) is formed.
Claim 9
Dependent Claim
32 words
A hydraulic brake system as claimed in claim 7, wherein the piston portion (37) guided in the bore (34) is enlarged in its diameter compared to the other two portions (36, 38).
Claim 10
Dependent Claim
23 words
A hydraulic brake system as claimed in claim 1, wherein the valve (15) is integrated into the housing of the master cylinder (1).
Claim 11
Dependent Claim
28 words
A hydraulic brake system as claimed in claim 9, wherein the valve (15) serves to close a pressure fluid channel in the housing of the master cylinder (1).
Claim 12
Dependent Claim
51 words
A hydraulic brake system as claimed in claim 10, wherein a normally closed outlet valve (10) is connected to the wheel brake (11) wherein said outlet valve (10), together with an inlet valve (8) and said first valve (15), is arranged in a valve block flanged to the master cylinder (1).
Claim 13
Dependent Claim
29 words
A hydraulic brake system as claimed in claim 1, wherein the valve (15) is a seat valve which is adapted to be closed by means of a screw thread.
Claim 14
Dependent Claim
41 words
A hydraulic brake system as claimed in claim 1, wherein the piston (35) is resiliently preloaded in the closed position of the valve and, during the filling procedure, is held by a removable stop in the opened position of the valve.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |