Mechanical control system in flow devices
US4682755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1986 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Jan 24, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K7/07
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pinch valve includes a housing with a quarter-turn closure mechanism disposed within the housing for adjustment of a spool-sleeve. The mechanism consists of two cam members rotatably supported in the housing on the opposite sides of the sleeve and connected to a hub via drive links. The hub is disposed proximate an opening in the housing and is rotated manually by a handle, or automatically by an actuator. Each cam member includes a first portion which is rotatable across the sleeve and a shank portion which is eccentrically disposed on the first portion and traverses the sleeve profile. As the cam members are rotated the shank portions move transversely of the sleeve longitudinal axis, toward and away from one another for pinching the sleeve and thereby selectively throttling or stopping the flow through the system. When rotated to a fully retracted or release position, the shank portions are completely withdrawn from the outside profile projection of the sleeve, whereby the sleeve can be removed axially from the housing. The pinch valve also may have motive fluid means for pinching the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.