Frequency discrimination type torque tester for use in determini

Details Frequency discrimination type torque tester for use in determini Frequency discrimination type torque tester for use in determini

1998-04-30

2000-01-04

Noori, Max

Measuring and testing

Dynamometers

Responsive to torque

7389208, 384448, G01L 302

Patent

active

060097647

ABSTRACT:
A frequency discrimination type torque tester which breaks down a torque acting between outer and inner races of a bearing into a spiky change component and an undulated change component. Output from a load cell is classified by frequency bands and the quality of the bearing can be evaluated by dividing the output into a torque chart recording only undulated changes based on deviation from roundness or rotational deflection, and which are gentle with the lapse of time, and a torque chart recording only spiky changes based on finishing accuracy of the race surface of the bearing or on a dent or dust included in the bearing, and which are of short duration.

REFERENCES:
patent: 3201981 (1965-08-01), Barnard
patent: 4680976 (1987-07-01), Lustenberger
patent: 4763508 (1988-08-01), Buck
patent: 4884449 (1989-12-01), Nishimoto et al.
patent: 5263372 (1993-11-01), Matsuzaki et al.
patent: 5311763 (1994-05-01), Gibbs, Jr. et al.
patent: 5517858 (1996-05-01), Matsuzaki et al.

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