Control valve and method of making and installing
US5992818A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 15, 1994 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Apr 15, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K7/061
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pinch type control valve uses an elastic sleeve having main flanges at each end of a center pinch section with flange gasket extensions on each end. The flanges of the flange gasket extensions project through metal backing flanges and each cooperates with a machined countersunk annular face groove on such metal backing flanges to pull the flange of the gasket extension radially outwardly as it is compressed. Offset annular beads on the opposite faces of the flange of the gasket extension help in achieving the required radial tensioning regardless of the type of flanging of the system. The annular face groove in the metal flange readily accommodates either flat or raised face pipe flanging. The metal backing flange fits between the main flange and the gasket flange and doesn't require the presence of the valve housing. This enables the sleeve to be tested without complete assembly. The sleeve center section is reinforced from the main flanges through a built up center hat section which forms shoulders substantially abutting but not joined to the root portions of the contiguous main flanges. This provides hinge points for the reinforcement avoiding significant stretch and enabling …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.