Lift-turn valve and actuator assembly
US4234157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1978 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Jul 20, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/5284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A lift-turn valve and actuator mechanism incorporating a valve plug and slip assembly that is movable with both axial and rotatable components of movement during opening and closing. Rotational movement is accomplished during lifting by cooperative relationship between opposed cam grooves defined in valve stem means and a pair of opposed rotatable cam follower elements that are supported by an actuator housing. The actuator housing is a fabricated structure incorporating threaded structure for receiving replaceable cam follower bearing mechanisms. The cam follower elements cooperate with the opposed cam grooves to provide efficient balanced force transfer through the valve actuator mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.