Reversing valve construction and valve member therefor and methods of making the same
US4188975A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1977 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Aug 19, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8667
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A reversing valve construction having a housing provided with a chamber carrying a movable piston-like valve member therein that controls ports of a valve seat of the housing through the relative position of a passage of the valve member relative to the ports. A one-piece flexible sealing skirt is carried by the valve member and extends outwardly therefrom in a cantilevered manner adjacent the valve seat means so as to be 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 means in a manner to tend to sealingly conform to the contour of the valve seat means and thereby seal the passage means of the valve member to the valve seat means while permitting sliding movement therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.