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:
Aug. 04, 1987
Filed:
Oct. 17, 1985
Applicant:
Inventor:
Raymond L Mortvedt, Santee, CA (US);
Assignee:
Ektelon, San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A63B / ;
U.S. Cl.
CPC ...
273 / ; 273D / ; 273D / ; 273 / ;
Abstract
The present invention comprises a graphite composite racquet frame having a particular structure that provides internal and external shock absorption. The internal shock absorption is provided by a core material having high impact strength such as an aromatic aramid. External shock absorption is provided by a fiber reinforced plastic wrapping. The shock absorption elements allow graphite fibers to be used for construction of racquets which are commonly subject to a great deal of physical abuse such as racquetball racquets.