US 4,375,762 A · Impact-fatigue test machine for grinding balls

Abstract

A closed system, impact-fatigue test machine for grinding balls comprised of a vertically extending guide member and a lift conveyor wherein the guide member lies above a recessed anvil and defines in its center a longitudinal opening. Each grinding ball is carried upwardly by the conveyor to an opening in the upper portion of the guide member and then is dropped into the guide member to land laterally supported, upon an earlier dropped grinding ball which rests on the anvil below. The earlier dropped ball is then pushed from the anvil toward the conveyor causing the dropped ball to impact the anvil below. The number of dropping cycles that each ball can tolerate without fracture is counted by a counter. Fracture of the balls is detected by a fracture detector.

Claims15

Dependent claims

An impact-fatigue test machine for grinding balls comprising:

a vertically extending guide means which guides dropping balls and has an upper portion and a lower end;
an anvil means below the lower end of said guide means, said anvil means having a recess which opens upwardly toward said lower end to receive the ball successively;
a counter means to count the number of the balls received by the recess of said anvil means;
a supporting means which supports the periphery of a ball on a preceding ball that rests on the recess of said anvil means;
pushing means which pushes said preceding ball out of said recess;
a lifting means which lifts the ball pushed out of said recess up to the upper portion of said guide means;
and
a detecting means to detect fracture of said balls.

5 more elements

Dependencies are inferred from the claim text.

Impact-fatigue test machine for grinding balls

Life of this patent

Impact-fatigue test machine for grinding balls

Life of this patent

Abstract

Claims15