Differential screw assembly for varying torque for valve
US8690121B2 · kind B2 · utility
2Cited by
18References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Mar 17, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/53
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An assembly for actuating a valve that is in a differential screw assembly when the valve is in a portion of its stroke that experiences high resistance. The actuating assembly is selectively changeable into a direct drive configuration when the valve is in a lower resistance portion of its stroke. A sliding sleeve moves axially within the actuating assembly and has a profile that is strategically dimensioned to change the actuating assembly configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.