Hydraulic cylinder and piston with automatic reciprocation valve
US4383475A · kind A · utility
6Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03C1/0073
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reciprocation valve for a hydraulically actuated reciprocation motor, wherein the motor has hydraulic inlet and outlet passages into a cylinder through a porting block, and a slidable collar is fitted over the porting block for selectively opening and closing the passages, and a lightweight carriage assembly is attached to the collar and is actuated by a trip rod coupled to a piston within the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.