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:
Jul. 07, 1992
Filed:
Jul. 17, 1991
Anthony J Sporri, Tallapoosa, GA (US);
United States Can Company, Oak Brook, IL (US);
Abstract
An aerosol can piston and system, employing an aerosol can with a sidewall which is necked in at the bottom and a low mass piston with recessed, depending legs. The piston has a lower skirt portion, the outermost diameter of which is slightly smaller than the diameter of the inner wall of the can above the necked-in portion. The legs depending from the piston have an effective outer diameter somewhat less than the inside diameter of the lower necked-in portion of the can sidewall and depend sufficiently downward to sit on the can bottom countersink while maintaining the skirt of the piston at a level just above the level at which the can sidewall necks inwardly. The legs thus stabilize the piston and prevent tipping and canting. In an alternative embodiment the piston also includes a plurality of vertical columns protruding from its sidewall to further stabilize the piston.