Piston shoe for fluid pressure pump motor
US3978772A · kind A · utility
10Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1974 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/124
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston shoe for fluid pressure pump motors of the piston type is substantially disc-shaped and includes a concave portion provided upon one end face thereof for seating the convex portion of a piston rod associated with the piston and cylinder assemblies of the pump motor, while the other end face thereof is substantially flat for contacting the sliding surface of a swash plate. A holder or retainer is also provided in association with the shoe for retaining the piston rod within the concave seat, such retainer being secured to the shoe by biasing means, or alternatively by being pressed or crimped thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.