Plastic valve with flexible tube and tube squeezing apparatus
US5297773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K7/063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plastic valve comprising a valve body, integral plastic valving duct means with rigid tubular plastic end portions for attachment to flow ducts carrying liquids to be valved, and a collapsible and distensible tubular plastic valving portion welded to the tubular end portions, the valving portion have sidewalls of plastic film laminae free of each other, but welded to each other at edges to form resilient side rib portions, squeezing linkages traversing flexible wall portions and applying squeezing pressure onto the flexible wall portions to close the flow passage therebetween, tiltable squeeze bars extending along the flexible wall adjacent the squeezing linkages and progressively deforming the flexible wall portions during application of squeezing pressure, camming impeller portions applying and relieving squeezing pressure against the squeezing linkages and squeeze bars and camming against the camming surfaces of the body portion as a driving head moves the impeller portions in the valve body portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.