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. 08, 1991
Filed:
Nov. 02, 1988
Applicant:
Inventor:
Roland Reed, El Cajon, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156172 ; 156187 ; 264258 ; 428 368 ; 273 / ; 273 / ;
Abstract
A frame for a tennis racket is formed of an inner tubular member, an outer tubular member, and a dampening sleeve of a visco-elastic material sandwiched between and bonded to the inner and outer layers. The dampening sleeve undergoes plastic deformation upon bending of the racket frame, due to the difference in movement between the inner and outer layers, and thus acts to dampen racket vibration caused by impact of the ball.