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. 26, 2005
Filed:
May. 26, 2000
Michael G. Knickerbocker, Saint George, UT (US);
Michael G. Knickerbocker, Saint George, UT (US);
Other;
Abstract
A finger operated pump assembly comprising a pump body () having a base () supporting an outer housing () and an inner housing () and defining a first portion of a compression chamber () therebetween. A piston () has an annular lip and has a piston outlet defined by a poppet valve seat. A poppet () is accommodated by the inner housing () and biased away from the base into engagement with the poppet valve seat by a spring (). The poppet () and inner housing () define an interior cavity (). A peripheral passageway () communicates with the compression chamber () and includes a one-way valve (). A ventilation port () is provided int the interior cavity () so that during operation of (), it may operate at ambient pressure.