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. 12, 1997
Filed:
Jun. 06, 1995
Applicant:
Inventors:
Michel Deal, St.-Remy-En-Rollat, FR;
Henri Hinc, Chamalieres, FR;
Assignee:
Sedepro, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417269 ; 417201 ; 417205 ; 417900 ;
Abstract
The pump includes two pistons 10 each sliding in a cylinder 11. These are fed by a screw 21 through ports 12. Upon delivery, a rotary valve 6 turning in a bearing 1A2 in succession closes off and uncovers the passages 1A1 from the cylinders. This rotary valve 6 includes an axial bore 61 and a slot 62 through which the material collected from the cylinders passes in the direction of the outlet orifice of the pump.