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:
Feb. 15, 1983
Filed:
Mar. 06, 1980
Applicant:
Inventors:
Lester G Massey, Moreland Hills, OH (US);
Robert I Brabets, Lombard, IL (US);
William A Abel, Joliet, IL (US);
James K Anderson, Gary, IN (US);
Thomas J Labus, Downers Grove, IL (US);
Davis A George, Park Forest, IL (US);
Assignee:
CNG Research Company, Cleveland, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417 46 ; 60452 ; 60468 ; 417213 ; 417307 ; 417313 ;
Abstract
A constant pressure system for pumping a coal slurry includes a slurry pump mechanically driven by a hydraulic motor which, in turn, is driven by a hydraulic pump. The output of the hydraulic pump is controlled by a pressure sensitive flow control valve that maintains the hydraulic fluid pressure drop as a constant across the hydraulic motor. The system assures a constant hydraulic motor output torque, driving the slurry pump at a constant delivery pressure.