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:
May. 30, 2000
Filed:
Jan. 07, 1999
Applicant:
Inventor:
Michael Philip Goldowsky, Valhalla, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
600 16 ;
Abstract
Fluid is periodically pumped through a motor-driven tubular pump at a substantially constant pumping frequency. The pump includes at least one resiliently reciprocate counterbalancing ring joined to a cooperating spring having a fundamental natural frequency corresponding with the pumping frequency and pumping flowrate is varied independently of the pumping frequency.