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. 29, 1978
Filed:
Dec. 17, 1976
Applicant:
Inventor:
Jerome A Gross, St. Louis County, MO (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B67D / ;
U.S. Cl.
CPC ...
2223865 ; 222389 ;
Abstract
For pressure dispensers of the barrier piston type, the present piston includes circumferential ribs and adjacent grooves. The grooves so reduce the bending resistance of the piston wall as to hinge inward, to slope the ribs downward. When pressure is applied within the piston, this bends the rib against the interior can wall like a squeegee. As the piston rises in the can, the rib flexes to take up surface irregularities. A plurality of these elements makes the piston wall flexible, permitting segments above and below each to deflect sideward. This flexibility to adapt to the cross-section of somewhat out-of-round cans adds reliability to the barrier piston pack system.