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:
Oct. 31, 1978
Filed:
Mar. 08, 1977
Applicant:
Inventor:
Giancarlo Giuffredi, Milan, IT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B67D / ;
U.S. Cl.
CPC ...
222321 ; 222341 ; 239337 ;
Abstract
An aerosol metering valve provided with a pumping effect, comprising a first hollow piston movable within a cylinder or chamber housing a second piston movable against a spring and normally urged thereby to a position closing the hollow piston, wherein the second piston has at least one passage which, under inoperative conditions of the valve, provides communication between the interior of the container and the cylinder or chamber.