Detent mechanism for a fluid control valve
US5205538A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2066
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Detent mechanisms are useful for retaining a stem of a control valve at predetermined operating positions. The ball type detents commonly used in control valves tend to slide thereby causing the operator to extend additional energy to overcome the sliding friction. The subject detent mechanism includes a roller rotatably disposed on a pin carried by a roller carrier. The roller has an annular arcuate surface in rolling contact with the peripheral surface of the stem. The arcuate surface increases the contact surface between the roller and the stem to thereby insure that the roller rolls on the stem and minimizes the lever effort necessary to move the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.