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US 4,061,333 AGranted
Adjustable tennis racquet
OwnerSpencer N. Shapsinventor
Life of this patent
Estimating the term…
Abstract
A tension device on a tennis racquet which when activated can adjust the tension of the strung area after the tennis racquet has been completely strung. This new invention consists of movable sidewalls attached to the fixed frame of a tennis racquet, to which the strings are attached. Thus when the movable sidewall with strings attached is activated the tension of the strung area is adjusted.
Claims1
A tennis racket with means for adjusting string tension comprising:
- a racket frame having a head portion carrying longitudinal and horizontal strings, a throat portion and a handle portion, a pair of spaced apart horizontal frame members located at the throat portion and fixedly attached to opposed sides of the frame, the frame sides and the pair of frame members forming an enclosed space, the tension adjusting means including a longitudinally moveable, horizontally extending tension bar located between the pair of frame members and within the enclosed space so that its horizontal movement in a plane perpendicular to the racket plane is restricted, the racket being strung so that the longitudinal strings extend freely through the upper frame member and then attached to the tension bar, a pair of screws threadedly engaging and extending through the tension bar and held in position by the pair of frame members, the screws having their manipulable ends extending outwardly from the lower frame member so that upon turning of the screws the tension bar is longitudinally displaced thereby adjusting the tension of the strings.
Dependencies are inferred from the claim text.