04747523 is referenced by 39 patents and cites 13 patents.

A manually actuated dispensing pump having a pump body extending transversely above a closure cap adapted for mounting the body at the upper end of a container, has an outwardly open pump cylinder for the reception of a reciprocable piston having spaced piston seals. To facilitate pump priming, the inboard seal is positioned relative to the inlet port so that the inboard seal overlies the inlet port at a predetermined position during the inward pressure stroke of the piston to permit flow of entrapped air from the pump chamber outwardly of the pump cylinder via the annular chamber defined between the piston seals.

Title
Manually actuated dispensing pump
Application Number
7/63920
Publication Number
4747523
Application Date
June 19, 1987
Publication Date
May 31, 1988
Inventor
Douglas B Dobbs
Yorba Linda
CA, US
Agent
Watson Cole Grindle & Watson
Assignee
Calmar
NJ, US
IPC
B67D 5/40
View Original Source