Flexible stem valve
US4085952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1975 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Jul 28, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87788
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve construction in the form of a "flex-finger" or flexible stem valve is provided for handling substances which are highly corrosive or very active chemically. The valve body, valve seats, a valve ball and flexible finger or flexible valve stem are all composed of chemically resistant material. The flexible stem has an outer end secured in the valve body against rotation with a fluid tight joint and an inner end for actuating the "ball". The flexible stem is composed of material which is sufficiently resilient so that it may be caused to travel in a circular or orbital path carrying or actuating a "ball" or other attachment into and out of engagement with the valve seat or seats. For causing such motion the flex stem is made hollow but with the lower end closed to prevent entry of fluid from a valve port, and a bent operating rod is mounted within the hollow space in the flexible stem with a slip fit so that rotation of the outer end of the bent operating rod serves to cause orbital movement of the inner end of the flexible finger without twisting or rotation thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.