Relay valve apparatus
AssigneeWABCO Westinghouse Fahrzuegbremsen GmbH
InventorsKarl-Heinz Deike, Bernd Kiel
Life of this patent
Estimating the term…
Abstract
A relay valve apparatus having two relay valves are located in a single housing with their longitudinal axes parallel to one another. The two relay valves each include a double seat valve and a relay piston. The two relay valves are located one behind the other in the direction along their longitudinal axes so that the two double seat valves are located between the relay pistons. An outlet chamber of the first double seat valve and an outlet chamber of a second double seat valve empty into a common fluid pressure outlet leading to the atmosphere.
Claims18
A relay valve apparatus for use in an anti-lock regulation system for vehicle brake units comprising:
- (a) a first double seat valve having a first inlet valve for establishing communication of a first working chamber with a fluid pressure input chamber, and having a first outlet valve for establishing communication of the first working chamber with a first outlet chamber which is in communication with the atmosphere;
- (b) the first double seat valve having a first relay piston which is connected to a first source of control pressure;
- (c) a second double seat valve having a second inlet valve for establishing communication of a working chamber with a fluid pressure input chamber, and having a second outlet valve for establishing communication of the second working chamber with a second outlet chamber which is in communication with the atmosphere;
- (d) the second double seat valve having a second relay piston which is connected to a second source of control pressure;
- (e) the first and second double seat valves and the relay pistons are located one behind the other in the direction of their longitudinal axes, so that the first and second double seat valves are located between the relay pistons;
- (f) the first outlet chamber of the first double seat valve and the second outlet chamber of the second double seat valve empty into a common pressure outlet passage leading to the atmosphere;
- and
- (g) a deflector located between the first and second outlet chambers for preventing interaction between the first and second relay pistons when fluid pressure is exhausted through the common outlet passage to atmosphere.
Dependencies are inferred from the claim text.