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:
Aug. 29, 2000
Filed:
Apr. 13, 1998
Applicant:
Inventors:
Jeffrey Glenn Barton, Vancouver, WA (US);
Steven Soar, Vancouver, WA (US);
Assignee:
Micropump, Inc., Vancouver, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417 14 ; 417 12 ; 417 42 ; 417326 ;
Abstract
A system and a method are provided for velocity modulation to create pulseless delivery of a fluid by a pump, particularly a piston pump. The system and method require input of data, such as a user-entered dispense rate or analog current or voltage input proportional to a desired output rate. A timer or counter is pre-loaded from a lookup table stored in a processor. The time or counter is started and, upon detection of an overflow condition, the motor and table pointer are incremented one step. As a result, pulseless operation of a pump is achieved.