Hydraulic actuating arrangements
US3992979A · kind A · utility
33Cited by
8References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Dec 20, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B18/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic actuator arrangement has a pair of double acting actuator devices coupled together for movement in unison. Each device has two control valves respectively operable to cause the device to move in opposite directions. The four control valves are resiliently coupled so that both actuator devices are normally energised simultaneously. Each control valve has an associated pressure relief valve so that failure of any one of the control valves permits the pressures on either side of the associated actuator device to be equalized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.