Valve
US4319734A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/201
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball valve having a cylinder slidable in a port. The cylinder has a lip which is pressed, by a spring, against a spherical surface surrounding a passage through the ball. A sleeve is slidable to a position over the cylinder, the sleeve having an annular groove adjacent the lip and a first seal therein. The sleeve has a portion contiguous to the cylinder at the end thereof opposite the lip, a second seal being provided between the housing and the sleeve portion. If C is the inside diameter of the lip, if B is the outside diameter of the length of the cylinder having the groove, if A is the outside diameter of the sleeve portion, if A>C, and if C>B, the valve will seal for flow in either direction or for zero flow all at, say, 3000 psi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.