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:
Nov. 20, 1984
Filed:
May. 20, 1982
Toshihiko Kakimoto, Tokyo, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A vibration damper of viscous damping type for damping low-frequency (10 to 20 Hz) vibrations has at least one subpassageway oblique to the axis of a main passageway. Since vortexes are generated around the main passageway as damping fluid passes through the subpassageway, the fluid can effectively reciprocate through the main passageway in response to pressure gradients induced by the vortexes, thus increasing the damping force generated as the fluid flows through the main passageway. Further, since the frequency at which the maximum flow rate, that is, the maximum damping factor can be obtained is determined on the basis of the dimensions of a passageway, the dimensions of the main passageway and the subpassageway are selected so as to match the maximum-flow-rate frequency of the subpassageway with that of the main passageway.