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. 26, 1986
Filed:
Feb. 19, 1985
Tommaso Ruscitti, Milan, IT;
S.A.R. S.p.A., Chieti, IT;
Abstract
A manually operated pump for the delivery under pressure in micronized form of liquid and/or thick substances or materials stored in a container on which the pump is mounted. The pump comprises a main hollow body, a movable hollow stem supporting a micronizing cap and extending into a pressure chamber defined by the hollow body, a spring urging the stem away from said chamber against a retaining element integral with the hollow body, a one-way valve sealingly bearing on a seat on the lower end of the chamber, an annular seal movable along the stem between two positions in which it clears and respectively it closes a channel in the stem opening into the axial cavity of the same stem, said seal sealingly engaging the inner surface of the hollow body and the outer surface of the stem. The pump is characterized in that the stem is provided with an annular collar positioned above the mentioned channel and which is defined by at least one frusto-conic surface and in that said seal has an elastic upper lip which is slidable upon said frusto-conic surface to urge the seal to close said channel.