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:
Jan. 21, 1986
Filed:
Dec. 19, 1983
Applicant:
Inventors:
Terry L Frazier, Paso Robles, CA (US);
Jan D Dozier, Huntsville, AL (US);
Assignee:
Texaco, Inc., White Plains, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166112 ; 1663051 ; 166370 ; 166 68 ;
Abstract
A reciprocating type oil well pump. It employs modifications of standard pump structure in order to obtain a reverse flow pulse during each pumping cycle. The pump barrel has a port near the upper end of the stroke, and the traveling valve is spring loaded against a desired pressure. The piston closes the port during the lower portion of the stroke.