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:
Dec. 01, 1981
Filed:
Jun. 25, 1979
Applicant:
Inventor:
John Hunter, Torrance, CA (US);
Assignee:
Thomsen Equipment Company, Gardena, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417517 ; 13762543 ;
Abstract
A fluid operated pump for concrete and similar materials comprising a pair of piston-cylinder units connected to a concrete housing having a single valve for controlling the charging and discharging of the material. The valve control element and the concrete housing are defined in a mating relationship for minimizing flow restrictions of the material moved through the housing. Other efficiencies in the fluid circuit structures and arrangements are provided.