Brake system metering valve with a pressure actuated brake switch
US5390987A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Mar 8, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/347
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic brake system metering valve includes an intergal brake switch having at least one pair of contacts. The brake switch contacts are movable between two positions. The combination valve includes a metering valve assembly having an axially shiftable metering rod. One end of the metering rod is adapted to operate the switch contacts. When pressure is initially applied to the brake system the metering rod shifts, causing the brake switch contacts to move from a first to a second position and thereby generate a first electrical signal. Upon release of the brake pressure, the metering rod shifts back, allowing the brake switch contacts to return to the first position and thereby generate a second electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.