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:
Aug. 20, 1985
Filed:
Apr. 30, 1984
Applicant:
Inventor:
Otto A Huiber, Kentwood, MI (US);
Assignee:
Hi-Tech Engineering, Inc., Grand Rapids, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417360 ; 417403 ;
Abstract
A chemical pump includes an access sleeve positioned between a hydraulic driving cylinder and the chemical injection cylinder with a rod coupled between the hydraulic driving piston and the injection piston. The access sleeve structurally secures the driving cylinder to the injection cylinder and includes access ports through a sidewall thereof such that when the injection piston is withdrawn into the sleeve, the seals are accessible for replacement or other piston maintenance. According to another aspect of the invention, the diameter of the hydraulic piston is substantially greater than that of the injection piston.