Piston cap
US5048648A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1991 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Jan 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/928
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a piston cap for a disc brake, comprising a brake motor consisting of a piston (24) sliding in a cylinder (26), this cap being composed of a flexible material ensuring sealing between the piston (24) and the cylinder (26) by way of a bead (32) located on its inner periphery and coming to rest in an annular groove (34) made in the head of the piston (2) and of a retention part on its outer periphery, capable of coming in contact with the inner wall of a receptacle formed at the end of the cylinder, this retention part comprising a metal insert (36) in the form of a cylindrical ring. According to the invention, the cap possesses at least one vent allowing the air contained in the volume which it delimits with the piston (24) and the cylinder (26) to escape and preventing the entry of foreign bodies or corrosive agents into this volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.