Reversing valve construction and parts therefor and methods of making the same
US4327774A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 1980 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Jan 17, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86839
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A reversing valve construction having a housing provided with a chamber carrying a movable valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports, a one piece flexible sealing skirt being carried by the valve member and extending outwardly therefrom in a cantilevered manner adjacent the valve seat so as adapted to be exposed to fluid pressure in the chamber that will act directly thereon and cause the flexible skirt to flex and engage the valve seat in a manner to tend to sealingly conform to the contour of the valve seat and thereby seal the cavity to the valve seat while permitting sliding movement therebetween. A spring in the housing acts on the flexible skirt to urge the same toward the valve seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.