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. 03, 1992
Filed:
Mar. 11, 1991
Applicant:
Inventors:
Harold R Gayle, Wilmington, DE (US);
William T Wilkinson, Chesapeake City, MD (US);
Mario Boiardi, Queenstown, MD (US);
Assignee:
Package Research Corp., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
222386 ; 92240 ; 92247 ; 92249 ; 277152 ; 2772 / ; 222319 ;
Abstract
A dispenser for flowable materials, such as toothpaste, includes a hollow barrel in the form of a tube open at its lower end and closed at its upper end with the flowable material being inserted in the tube. A plunger which is also in the form of a hollow tube having a closed upper end, is telescopically arranged in the barrel. A seal is effected by a hinged peripheral rim on the outer surface of the piston near its upper end. The flow of the material forces the peripheral rim to pivot into sealing contact with the inner surface of the barrel.