Stop valve
US4958802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S251/904
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A stop valve has a valve body, a stem, and a handle. The valve body has a cylindrical cavity, which has a side wall and a first end wall, an inlet opening and an outlet opening, both of which communicate with the cylindrical cavity. The outlet opening has a side wall that intersects with the cylindrical cavity side wall; the intersection of which is chamfered. The valve stem has a cylindrical cavity portion which is located in the valve body cylindrical cavity and a handle portion which protrudes from the cylindrical cavity portion through an opening in the first end wall. The stem has an outlet seal ring and a stem seal O-ring. The stem seal O-ring is retained on the stem by a flange portion having a diameter slightly greater than the inside diameter of the O-ring. The stem has retaining ears to retain the stem in position in the valve body independently of the handle. The handle has a rectangular opening that matingly engages a drive portion on the stem that includes two members each with a rectangular cross-section. As the handle is assembled onto the stem, the two members flex inwardly until lips on the two members are able to matingly engage shoulders in the handle. The lips a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.