Pressure switch valve, for hydraulic vehicle brake systems with

Details Pressure switch valve, for hydraulic vehicle brake systems with Pressure switch valve, for hydraulic vehicle brake systems with

1991-05-13

1993-01-26

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Flow retarder

Isolation valve

1375395, 3031132, A60T 832, B60K 2816

Patent

active

051817683

ABSTRACT:
A pressure switch valve which briefly raises a pressure during switching of the valve. The pressure switch valve has a cylindrical chamber with a first ball that engages a valve seat of an inflow conduit. A second, spring-loaded ball is supported on the first. Both balls are longitudinally movable with slight radial play in the cylindrical chamber. An outflow conduit branches off from the cylindrical chamber at one point in such a way that upon switching of the valve, a normal plane containing the spherical center of the first ball toward the valve seat and extending at right angles to the longitudinal axis of the chamber does not reach the mouth cross section of the outflow conduit until a corresponding normal plane of the second ball toward the spring has already exited from the mouth cross section.

REFERENCES:
patent: 4861118 (1989-08-01), Burckhardt et al.

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