Plastic service valve
US4511120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1983 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Mar 11, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K27/065
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve includes a molded plastic body portion having an internal chamber with upper and lower portions. Fittings connect the valve to conduits of a piping system. A valve seat surrounds inlet and outlet openings in the chamber lower portion. A plastic plug member is rotatably positioned in the valve seat. The plug member is a molded unitary element. The valve body portion and plug member have a substantially uniform wall thickness throughout. The plug member includes an integral plug portion and an actuator portion which facilitates ease of disassembly of the valve for repair. The plug portion has a flow passage which communicates with the inlet and outlet openings in the valve seat and is rotatable between open and closed valve positions. Seals retained on the plug portion engage the valve seat in the closed position. The actuator portion includes shearable stops which permit 360.degree. rotational operation of the plug member upon failure of the stops under excessive torque. The actuator portion extends upwardly through the chamber upper portion, and a flange portion and a stem portion of th actuator extends above the valve body. The flange portion is spaced circumferentially ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.