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:
Sep. 24, 2002
Filed:
Jul. 24, 2001
Theodore J. Falk, Clarence, NY (US);
Norbert W. Frenz, Jr., Clarence, NY (US);
Wilson Greatbatch Ltd., Clarence, NY (US);
Abstract
An electromagnetic pump including a housing having an interior fluid containing region, a check valve operatively flow in a direction from an inlet toward an outlet and blocking fluid flow in a direction from the outlet to the inlet, an electromagnet carried by the housing located external to the fluid containing region, and a barrier of fluid impervious material for isolating the electromagnet from the fluid. An armature movable in the housing through pumping and return strokes has a pole portion located for magnetic attraction by the electromagnet and has a plunger portion extending from the pole portion. The armature plunger and pole portions have formations crimped together to secure the plunger and pole portions together. The barrier or an end surface of the armature pole portion are shaped to enhance separation of the barrier and armature pole portion at the beginning of the return stroke. The housing is provided with shims for adjustment of the delivered stroke volume.