Cam follower piston
US4043255A · kind A · utility
9Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1975 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Jul 22, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2225/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston for a hydrostatic machine comprises a cam follower ball in a seating in a piston body. An aperture through the piston body provides access for working fluid to reach the seating to give lubrication and hydrostatic support. A low friction insert of synthetic plastics material in the seating provides a bearing surface for the ball. The insert is retained in the piston body by a lip which prevents or inhibits extrusion of the plastics material under working load pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.