Tennis ball tester

Details Tennis ball tester Tennis ball tester

1993-04-14

1994-03-08

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

G01N 348

Patent

active

052917746

ABSTRACT:
A means of testing used tennis balls by inserting them between a compression arm with a pressure point midway of the ball and a base with backstop which also engages the ball. The weighted compression arm is allowed to fall on the ball and a reading is obtained at the forward end of the tester to determine if the ball is playable, practicable or should be discarded.

REFERENCES:
patent: 4136554 (1979-01-01), Larson
patent: 5222391 (1993-06-01), Reenstra

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