Multi-cylinder hydraulic mechanism
US4157056A · kind A · utility
6Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1977 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Sep 20, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/063
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic mechanism, e.g. a pump or motor, comprises a plurality of cylinders and pistons and a piston-displacement selector which is provided with blind helical grooves for controlling connection of the cylinders to the main fluid supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.