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. 23, 1998
Filed:
Feb. 28, 1997
R Craig Hannah, Calgary, CA;
Paul Wierzba, Calgary, CA;
John PM. Doyle, Calgary, CA;
Randy W Perusse, Calgary, CA;
ETI Technologies Inc., St. Peter Port, GB;
Abstract
A counterbalancing apparatus for dynamically balancing an out of balance rotating member. A first series of weights having identical size and weight are mounted to freely move within a first groove or race when the apparatus is rotating after being mounted to a shaft or other rotatable member. A second series of weights having identical size and weight are similarly mounted to freely move within a second groove or race located inside of the first race. The first series of weights is different in size and weight from the second series of weights. A locking apparatus locks and releases the weights at predetermined angular velocities. Fluids of different viscosities and race configurations are additionally used to vary weight dynamics.