Air shift conversion apparatus for manual valves
US4585024A · kind A · utility
9Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1984 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Aug 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8663
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An air actuator device is provided for manually operable hydraulic valves having a valve spool moving in a bore in a valve housing in the form of an actuator housing adapted for attachment on the valve housing and having a bore carrying a piston coaxially engageable with the spool end, spaced openings in the actuator housing communicating with the bore therein to introduce air to act on opposite sides of the piston and resilient means on at least one side of the piston normally urging the piston and spool to a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.