US2021387059A1PendingUtilityA1

Racket

Assignee: SUMITOMO RUBBER INDPriority: Jun 11, 2020Filed: May 27, 2021Published: Dec 16, 2021
Est. expiryJun 11, 2040(~13.9 yrs left)· nominal 20-yr term from priority
Inventors:Fumiya Suzuki
A63B 2209/023A63B 49/03A63B 49/10A63B 60/54A63B 49/02A63B 2209/00A63B 49/022A63B 2209/02
43
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Claims

Abstract

A tennis racket includes throats. Each throat includes a fiber reinforced layer and a vibration damper. The vibration damper is surrounded by the fiber reinforced layer. The fiber reinforced layer includes a plurality of reinforcement fibers and a matrix. The reinforcement fibers are typically carbon fibers. The material of the matrix is a resin composition whose base material is an epoxy resin. The vibration damper is formed of a polymer composition. The polymer composition contains a base polymer. The base polymer is preferably a styrene-isoprene-styrene block copolymer or an acrylic elastomer.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A racket comprising a frame, wherein
 the frame includes a fiber reinforced layer and a vibration damper joined to the fiber reinforced layer,   the fiber reinforced layer includes a reinforcement fiber and a matrix whose base material is an epoxy resin, and   a material of the vibration damper is a polymer composition whose base material is a styrene-isoprene-styrene block copolymer or an acrylic elastomer.   
     
     
         2 . The racket according to  claim 1 , wherein
 the frame includes a head, two throats, and a shaft, and   each throat includes the vibration damper.   
     
     
         3 . The racket according to  claim 1 , wherein
 a thickness of the vibration damper is greater than or equal to 0.10 mm but less than or equal to 1.00 mm.

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