Pressure switch valve, for hydraulic vehicle brake systems with traction control (ASR)
US5181768A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | May 13, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7928
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.