Lock and key retainer for excavator tooth

Details Lock and key retainer for excavator tooth Lock and key retainer for excavator tooth

1981-10-13

1983-01-11

Crowder, Clifford D.

Excavating

Ditch filler

24211L, 299 92, 403317, 403324, 411353, 411517, E02F 928

Patent

active

043676022

ABSTRACT:
Two staple-like spring metal parts designated "lock" and "key" are provided to retain an excavating tooth in a holder. The lock part slides into an opening in the holder for the tooth around a reduced diameter portion of the shank of the tooth and thereby prevents withdrawal of the tooth by interfering with the outward movement of a button on the extreme end of the shank. The legs of the lock are biased outwardly by reason of the unstressed shape of the lock. These outwardly biased legs are forced inward by insertion in the opening of a key which fits outward of the lock and forces the legs of the lock inward into locked position, engaging a portion of the shank. When the key is removed, it provides space for outward movement of the legs of the lock and thereby prevents a tendency of dirt compacting in the opening of the holder from preventing withdrawal of the lock.

REFERENCES:
patent: 3751834 (1973-08-01), Petersen
patent: 3952433 (1976-04-01), Heinold et al.
patent: 4050172 (1977-09-01), Petersen

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