Disc brake piston
US5105917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Dec 31, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A disc brake piston is formed from a stamping operation and is preferably constructed from stainless steel. The piston includes a hollow cylindrical body having a closed end and an open end. In one preferred embodiment, the open end is provided with a radially outwardly extending flange which defines an annular abutment surface for engaging a backing plate of a disc brake shoe. An integral boot groove is formed in the cylindrical body adjacent the open end thereof, and produces a raised portion on an inner surface of the body portion directly opposite the groove. This results in the piston having a substantially uniform wall thickness throughout the entire length of the cylindrical body. Also, the piston can include a dome-shaped recess formed in the closed end thereof, which can be provided with radial strengthening ribs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.