Shock absorbing bit retaining ring

Details Shock absorbing bit retaining ring Shock absorbing bit retaining ring

1988-11-15

1990-05-15

Yost, Frank T.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

B23B 4516

Patent

active

049249487

ABSTRACT:
A percussion tool assembly, such as a rock drill assembly, with a new and useful split retaining ring for maintaining the drill bit in the drill assembly. The split retaining ring has a Belleville spring-like profile to enable the split retaining ring to deflect resiliently when the drill bit is driven into engagement with the split retaining ring. The split retaining ring functions as a conventional retaining ring and also as a shock absorber to absorb surplus energy not completely used in the drilling of rock or other strata.

REFERENCES:
patent: 2798048 (1961-04-01), Walker
patent: 3322216 (1967-05-01), Kurt
patent: 3343606 (1967-09-01), Dollison
patent: 4079793 (1978-03-01), Mosely et al.
patent: 4194582 (1980-03-01), Ostertag
patent: 4562974 (1986-01-01), Bezette et al.
patent: 4614241 (1986-09-01), Croven

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