Gastight manually-operated valve
US5213307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/088
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gastight manually-operated valve comprising a cylindrical valve body including a first orifice and a second orifice, and containing a piston valve-member that is prevented from rotating but that is free to move axially between a closed position closing said first orifice and an open position providing free communication between said first orifice and said second orifice, wherein said body is provided with a control ring surrounding the outside of the valve body, prevented from moving axially, and free to move in rotation, both said control ring and said piston valve member being fitted with at least one pair of axially polarized permanent magnets, with the two magnets in each pair being polarized in opposite directions to each other and extending respectively on two diametrically opposite generator lines of the body or valve member part carrying them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.