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:
Jan. 23, 1990
Filed:
Sep. 24, 1987
Applicant:
Inventor:
Peter J Fritz, Mequon, WI (US);
Assignee:
A. O. Smith Corporation, Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ; F16F / ;
U.S. Cl.
CPC ...
464180 ; 464181 ;
Abstract
A dynamically balanced drive shaft. The shaft is preferably formed of fiber reinforced resin and is designed to operate at speeds below the first critical speed. To balance the shaft, a mass or patch of resin containing high density particles, such as metal particles, is applied to one or more locations on the shaft. The patch extends only a portion of the circumference of the shaft and generally has an area less than 10 sq. inches, and generally has a thickness less than 1/16th inch.