Pump with reciprocating high pressure seal and valve for vehicle braking systems
US7104613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | Jul 28, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/4031
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pump assembly with a combination reciprocating high-pressure seal and fluid inlet check valve for use within brake systems. The pump assembly comprises a housing having a bore formed therethrough and a piston disposed within the bore for reciprocal movement therein. An annular seal is disposed around the piston for reciprocal movement thereon. The annular seal cooperates with the piston and/or the housing to form at least one longitudinally extending passageway. The passageway, the piston, the annular seal, and the housing cooperating to form a check valve assembly. The annular seal is moveable to a first position relative to the piston in which the check valve assembly is in a flow-through position to fill a pump chamber with fluid from an inlet chamber during a fluid inlet stroke. The annular seal is moveable to a second position relative to the piston in which the check valve assembly is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.