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:
Jun. 04, 1991
Filed:
Nov. 30, 1989
Applicant:
Inventor:
Ahid D Nashif, Cincinnati, OH (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417363 ; 188178 ; 248559 ;
Abstract
Noise of a vehicular fuel pump is reduced by determining the major frequency range of the objectionable noise and the deformation patterns of vibrating elements of the pump, and providing a passive vibrator which has designed mass, stiffness and damping values that cause it to resonate in the major frequency range and to provide an out-of-phase reaction force which is of sufficient magnitude to offset the undesired vibration. The passive vibrator may be mounted on the pressure or return line of the pump.