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. 28, 1990
Filed:
Apr. 14, 1989
Applicant:
Inventor:
Marc Brison, Le Roger, FR;
Assignee:
Valois (Societe Anonyme), LeNeubourg, FR;
Primary Examiner:
Int. Cl.
CPC ...
B67B / ;
U.S. Cl.
CPC ...
222 82 ; 222321 ; 222383 ;
Abstract
In a pump dispenser for dispensing accurate small quantities of a fluid substance, e.g. an ophthalmological substance, comprising a pump body (1), a piston (5) movable between two positions, a suction orifice, and a discharge orifice, the opening through the suction orifice is directly and positively controlled by displacement of the piston using a slide valve type of mechanism, with the discharge orifice being provided with a non-return valve and with the compression chamber of the pump being annular in shape between the piston and the pump body.