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. 03, 1998
Filed:
Mar. 17, 1997
R Craig Hannah, Calgary, CA;
Paul Wierzba, Calgary, CA;
John P Doyle, Calgary, CA;
Randy W Perusse, Calgary, CA;
ETI Technologies Inc., Guernsey, GB;
Abstract
A balancing arrangement for removing imbalance in a rotatable element includes a plurality of annular races provided in an enclosing structure and a plurality of movable weights disposed in each of the races for movement within the races during rotation of the rotating member. A fluid is also disposed in each of the races. The plurality of races can include a first race having a particular cross-sectional shape and a second race having a different cross-sectional shape so that shear forces exerted on the weights in each race during rotation of the rotating member are different. The balancing arrangement can also be constructed so that the weight of the weights in one of the races is different from the weight of the weights in the other race. In addition, more than two races can be employed and the races can be disposed in a common plane or in axially displaced positions with respect to one another.