Tubular steel racquet frame having varying cross-section

Details Tubular steel racquet frame having varying cross-section Tubular steel racquet frame having varying cross-section

1984-06-14

1985-12-31

Pinkham, Richard C.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273 73C, 273 73J, A63B 4912

Patent

active

045616558

ABSTRACT:
A steel tubular frame design for racquetball racquets, has a varying cross-sectional structure. This structure gives strength in the lower portion of the racquet so as to reduce the torsional and flexional movements of the frame in that area and has a different cross-sectional area in the upper portion of the racquet where flexibility is needed, providing this flexibility in a continuous one-piece racquet. The invention is characterized by a four-sided peanut-shaped steel tube that has convex corners and two concave sides on the long sides. The convexity and concavity varying at different points throughout the racquet. The racquet frame is of a quadraform/wishbone configuration and is throatless.

REFERENCES:
patent: 1618727 (1927-02-01), Reach
patent: 2171223 (1939-08-01), Robinson
patent: 3086777 (1963-04-01), Lacoste
patent: 4299348 (1981-11-01), Fukumoto

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