The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 1990
Filed:
Apr. 07, 1988
David T Underwood, Richardson, TX (US);
United States Brass Corporation, Plano, TX (US);
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 and shoulders are tapered so that as the handle is pulled away from the valve, the retaining action of the lips and shoulders is increased.