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. 29, 1978
Filed:
Jan. 31, 1977
Applicant:
Inventor:
Jan W Gerritsen, Alphen an der Rijn, NL;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ; F04B / ;
U.S. Cl.
CPC ...
417477 ; 138137 ;
Abstract
A peristaltic pump, in particular for pumping concrete, cement, and other mixtures containing liquid. The pump has a hose having layers of helically wound reinforcing threads embedded in the wall thereof. The angle of pitch of the windings in one layer is opposite to that in the other layer. The hose is fastened at the delivery end, and the angle of crossing, opening in the longitudinal direction of the hose, between the windings in the different layers is larger than the equilibrium angle.