Excavating – Ditch filler
Patent
1990-10-09
1991-07-02
Taylor, Dennis L.
Excavating
Ditch filler
37142R, E02F 928
Patent
active
050275356
ABSTRACT:
A boltless U-shaped holding clamp for wedgedly clamping cutting teeth to scarifier shanks of earth moving equipment. The clamp includes a first receiving channel having inclined bearing surfaces for engaging locking grooves of the snout of the scarifier shank, and a second receiving channel defined by a flat portion of the shank and the U-shaped member to receive an elongated cutting tooth of constant transverse cross section. The U-shaped clamp member is formed of a material having a certain modulus of elasticity to provide a resilient wedging force between the clamp and shank so as to absorb impact and vibrational forces applied to the tooth under load conditions, while the tooth material is a substantially hardened material for providing good wear resistance. The clamp is designed to translate substantially all of the clamp-to-shank wedging force to a frictional contact force between the tooth and the clamp, which in turn, develops a frictional contact force between the tooth and the shank. The clamp-to-tooth frictional contact force exceeds the tooth-to-shank frictional force whereby to facilitate greater wedging engagement of the clamp when axial loads are applied to the tooth. Greater clamp-to-tooth frictional contact can be attained by providing a tooth which is wider than the thickness of the shank. A worn tooth may be extended by being adjustably clamped against the shank thereby providing greater consumption of the tooth material, or alternatively, by placing abutments and/or spacers in the receiving channel of the clamp to extend the tooth.
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McBee J. Russell
Taylor Dennis L.
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