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. 05, 1981
Filed:
Jul. 02, 1979
Applicant:
Inventors:
Avner Levy, Irvine, CA (US);
Irving Karsh, Costa Mesa, CA (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
226190 ; 226 61 ;
Abstract
Disclosed are methods and apparatus for providing torsional fluid dampening in the kHz region with an inertial mass located in a rotary fluid container, and with a viscous fluid friction boundary layer located between that mass and a circumferential wall of the container. A supply of viscous liquid having a volume equal to the combined volumes of the boundary layer and inertial mass is provided. Both the inertial mass and the boundary layer are formed with that supply of viscous liquid in the fluid container which may then be rotated.