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:
Jun. 24, 1980
Filed:
Sep. 01, 1978
Clifford M Peters, Longview, TX (US);
W-K-M Wellhead Systems, Inc., Shreveport, LA (US);
Abstract
A valve device consisting of a valve body with a bore slidably receiving a valving plunger (30, 34) and having openings (64, 68) spaced along the bore wall for carrying high pressure controlling or controlled fluid. Interposed between the openings is soft seal means, such as O-rings (48, 54), embedded in suitable recessing in the bore wall. The valve plunger has an internal passage (76) with longitudinally spaced ports or ducts (78, 80) opening through the plunger wall and movable with the plunger, selectively, between positions on the same side of the seal means and on opposite sides thereof for connecting the body openings. The plunger transverse ducts (78, 80) are not of appreciably greater cross-sectional dimensions, longitudinally of the plunger, than said soft seal means (48, 54) and is closely confined on all sides, when exposed to a plunger port, by adjacent body and plunger wall structure so that distortion and extrusion of the seal, under high pressure in the plunger passage, is prevented.