Variable-length tool holder

Details Variable-length tool holder Variable-length tool holder

1977-01-31

1978-07-25

Watson, Robert C.

Bridges

81177A, 279 79, B25G 100

Patent

active

041023757

ABSTRACT:
A variable-length tool holder having a shank assembly including a hollow shank into which a shaft is adjustably inserted. Mounted on the shaft is a bit holder for retaining a tool bit on the shank assembly. The hollow shank forms a hole having a non-circular cross section, with the shaft also having a non-circular cross section and mating in the cross section of the hole of the shank for rotating with the shank. External screw threads are cut into the shaft for threadedly engaging with the internal screw threads of a nut rotatably attached to the shank in order to permit axial movement of the shaft relative to the shank by rotation of the nut.

REFERENCES:
patent: 1145597 (1915-07-01), Kopacki
patent: 1814274 (1931-07-01), Williamson
patent: 2725086 (1955-11-01), Keyes et al.
patent: 2805594 (1957-09-01), Fogel
patent: 3306639 (1967-02-01), Lyon
patent: 3376644 (1968-04-01), Clarke
patent: 3824881 (1974-07-01), Wright

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