Piston with fluid sealing ridges
US6612339B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2001 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/61
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A piston for a low pressure fluid accumulator of a hydraulic control unit of a vehicle brake system includes a cylindrical body having an outer surface defining a first end surface of the piston. The first end surface includes a plurality of interconnected ridges. The ridges have outer surfaces and form cavities therebetween. Each ridge is adapted to provide a sealing surface between the first end surface of the piston and an inner surface of a fluid accumulator in which the piston may be inserted. In one embodiment of the invention, the closed end of the piston includes a thick self-supporting wall. A thin skirt extends from the thick self-supporting wall toward the open end of the piston. A plurality of axially extending skirt support ribs is formed on the inner surface of the piston skirt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.