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:
Feb. 12, 1991
Filed:
Oct. 11, 1988
Applicant:
Inventor:
Owen F Van Brocklin, Bristol, CT (US);
Assignee:
Risdon Corporation, Naugatuck, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
222321 ; 222341 ; 222385 ; 222477 ; 222571 ; 239333 ; 417446 ;
Abstract
A reciprocating pump for dispensing liquids from a container comprises a hollow body in which is slidably fitted a hollow piston. A piston seat is located in the body and provides a segment sized for sealing fit inside the hollow piston, thereby minimizing possible leakage through the pump when it is transported with a liquid filled container. Upper and lower valves are provided in the piston and body respectively. The piston seat is adapted to interact with the upper valve member to hold it open during a portion of an upward stroke of the piston thereby drawing any undispensed liquid back into the pump.