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:
Oct. 07, 2008
Filed:
Jan. 28, 2005
Applicant:
Clayton Hoffarth, Breton, CA;
Inventor:
Clayton Hoffarth, Breton, CA;
Assignee:
Global Energy Services Ltd., Calgary, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 35/02 (2006.01); F04B 53/12 (2006.01); F04B 47/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydraulic oil well pumping installation includes a down hole pump positioned down a well, the down hole pump including a master cylinder and at least one slave cylinder in axial alignment with the master cylinder. A master piston is positioned in the master cylinder and divides the master cylinder into a first portion and a second portion. A slave piston is positioned in the at least one slave cylinder and divides the slave cylinder into a first portion and a second portion. The slave piston is connected by a rigid linkage to the master piston, such that movement of the master piston results in movement of the slave piston.