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:
Jan. 21, 1997
Filed:
Feb. 23, 1996
Steve Abel, Chandler, AZ (US);
Gordon Whelpley, Chandler, AZ (US);
AlliedSignal Inc., Morris Township, NJ (US);
Abstract
An apparatus for reducing ripple in the flow of a fluid through a positive displacement pump comprises an inlet tube in fluid communication with an inlet of the pump and an outlet tube in fluid communication with an outlet of the pump. A first annulus is in fluid communication with the inlet tube and a second annulus is in fluid communication with the outlet tube. A drive shaft is connected to a main drive shaft of the pump and first and second cams are connected to the drive shaft. The first cam is associated with the first annulus and the second cam is associated with the second annulus. A plurality of pins are provided and each has a portion located within one of the annuluses and an end opposite that portion in contact with the cam associated with the respective annulus. During operation of the pump, the drive shaft rotates the cams thereby driving the pins up and down within the annulus and thereby creating a ripple within the fluid contained within the annuluses and thereby within the inlet and outlet of the pump, thereby effectively canceling or substantially offsetting the pressure ripple created by the action of the pump.