Brake valve with prefill chamber unloading valve
US5394701A · kind A · utility
4Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1994 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Feb 25, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/224
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Left and right two stage brake valves communicate fluid pressure to left and right brake mechanisms, each brake valve having an inlet for receiving pressurized brake fluid, a reservoir, a stepped bore and a stepped piston. The stepped bore and the stepped piston forming a high volume prefill chamber and a high pressure chamber. A prefill drain valve communicates the prefill chambers to the reservoir only when pump pressure is available at the inlet and blocks communication between the left and right prefill chambers and between the prefill chambers and a reservoir when pump pressure is not available at the inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.