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:
Dec. 10, 1991
Filed:
Dec. 05, 1990
Applicant:
Inventor:
John Schraub, Huntsville, TX (US);
Assignee:
McMurry Oil Tools, Inc., Huntsville, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137504 ; 137508 ; 251 86 ;
Abstract
A water injection valve for use in a well bore having a cylindrical valve body with an axial water passage, a cylinder slidably mounted therein with an upstream control shoulder, lateral fluid ports in the cylinder upstream of the seal between the cylinder and the valve body and an open downstream end which restricts fluid flow when the cylinder impinges upon a conical valve seat. The cylinder is adjustably biased away from the valve seat by a spring and permits fluid flow no greater than a predetermined maximum rate despite increases in pressure differential across the valve.