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:
Apr. 01, 1980
Filed:
Feb. 27, 1978
Applicant:
Inventors:
Hans Heimgartner, Jona, CH;
Karl Wirz, Meilen, CH;
Assignee:
Haeny & Cie. AG., Meilen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B67D / ;
U.S. Cl.
CPC ...
222 61 ; 222 63 ; 222135 ; 222255 ;
Abstract
An apparatus for the essentially uniform feed or conveying of a fluent or flowable medium by means of to-and-fro moving feed or conveying pistons, wherein there are provided at least two single-acting feed pistons. Each of the feed pistons is equipped with a forward drive and a return drive. The return velocity is greater than the forward velocity. The forward drive and return drive are driven with a phase shift such that the terminal or end portion of the feed stroke of the one feed pump overlaps the starting portion of the feed stroke of the other feed pump.