Control system with actuator powered by dual sources
US3972188A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1975 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Oct 9, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7053
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system comprising an actuator having a fluid responsive member movable in at least first and second directions and two sources for controlling the fluid responsive member. A first of these sources includes a servo pump which pumps fluid from one side of the fluid responsive member to the other to thereby control the position of the fluid responsive member. A second of these sources includes a valve which controls the supply of fluid under pressure to the fluid responsive member and the return of fluid from the fluid responsive member. The servo pump and valve are arranged in parallel with their flows being summed at the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.