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:
Mar. 29, 2016
Filed:
Feb. 26, 2014
Emsar S.p.a., San Giovanni Teatino (CH), IT;
Marco Zavarella, Sulmona, IT;
Matteo Caporale, Pescara, IT;
APTAR ITALIA S.P.A., San Giovanni Teatino (CH), IT;
Abstract
A dispensing pump includes a housing extending along a longitudinal axis and configured to be inserted in a bottle. The housing defines a dosing chamber and includes a venting hole. A retaining ring is fastened to the housing and inserted therein. A hollow stem is associated to a piston and inserted in a hole of the retaining ring leaving a passage. The hollow stem and piston are movable between a lowered position and a raised position corresponding to different volumes of the dosing chamber. A venting path includes at least the passage between the hollow stem and the retaining ring and the venting hole. Through the venting path a volume of air enters the bottle through the venting hole during the pump actuation to replace liquid pumped out from the bottle by the pump. A venting valve is interposed between the hollow stem and retaining ring, along the venting path.