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. 15, 2004
Filed:
Sep. 04, 2002
Applicant:
Inventor:
Bjorn Eilertsen, Hundvag, NO;
Assignee:
Engineering & Drilling Machinery AS, Bryne, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B 3/504 ;
U.S. Cl.
CPC ...
F04B 3/504 ;
Abstract
A piston pump assembly having a single drive gear assembly associated with two adjacent pump cylinders. Each pump cylinder has a separate valve unit associated therewith. The two pump cylinders have a common piston rod having a pump piston arranged at each end. The piston pod is formed as a toothed rack and the drive gear assembly includes motor-driven gearwheels engaged with the toothed rack.