Valve
US5782455A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Aug 9, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/0421
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve has an elongated body open-ended, with a bore with a center line extending from one end of the body to the other. The bore is interrupted by a fluid tight partition, on both sides of which, ports extend through the wall of the body. An elliptical seat is formed on the outer surface of the body between the ports, the seat or channel being diagonal as viewed in side elevation with respect to the bore center line. A sleeve is rotatably mounted on the body. The sleeve has a smoothly cylindrical bore extending from an inlet end to a diagonal, radially outwardly extending annular shelf, between the first cylindrical bore and a second bore that is radially larger than the first bore. Channel-defining ribs extend parallel to the center line, from the shelf to a point short of the outlet end of the sleeve. The ribs have a radially inner face formed on the same radius as or slightly larger radius than the first bore. A seal in the elliptical seat in the closed position of the valve is in uniform engagement with the smooth cylindrical first bore throughout its perimeter, and in its open position is at least in part in engagement with the radially inner surfaces of the ribs, whereby in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.