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. 16, 1980
Filed:
Nov. 24, 1978
William J Bauer, LaGrange, IL (US);
Other;
Abstract
A hydraulic screw pump is provided having a rotatable screw which may comprise a helical blade disposed within an enclosed full or open half cylinder. In half-cylindrical constructions the helical blade rotates relative to a half cylinder which may be formed of concrete. The enclosed screw pumps may have the helical blades welded to the inner periphery of a surrounding metal cylinder so as to rotate therewith, or be welded to said surrounding metal cylinder and also to an inner cylinder which provides axial reinforcement. In all of the foregoing pump embodiments the improvement of this invention may be utilized to provide increased pump capacity by the novel expedient of flaring the pump discharge end so as to increase the critical depth and critical flow area in said discharge end thus increasing the possible maximum rate of liquid discharge.