Resiliency testing device for tennis balls

Details Resiliency testing device for tennis balls Resiliency testing device for tennis balls

1994-10-12

1996-04-30

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

G01N 348

Patent

active

055114105

ABSTRACT:
A sports ball resiliency testing device is disclosed. The device includes a housing that defines a receiving area into which a ball is placed. The receiving area is configured and dimensioned to act upon the contours of the ball. A movable member extends into the receiving area and makes contact with the surface of the ball. The movable member is urged by a spring so as to exert a compressing force on the ball. The urging force of the spring is adjustable so as to provide for various testing ranges. The ball thus exerts a resisting force against the movable member. A value of the resisting force is determined when an equilibrium is reached between the compressing force and the resisting force. This value indicates the playability of the ball.

REFERENCES:
patent: 2278416 (1942-04-01), Ahi
patent: 2628496 (1953-02-01), Wick
patent: 3470737 (1969-10-01), Fridley
patent: 4136554 (1979-01-01), Larson
patent: 5222391 (1993-06-01), Reenstra
patent: 5372030 (1994-12-01), Prussia et al.

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