Flexible shaft for a roof drill

Details Flexible shaft for a roof drill Flexible shaft for a roof drill

1976-05-07

1977-11-08

Hafer, Robert A.

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

173 26, 173147, 64 2R, B23Q 500

Patent

active

040571157

ABSTRACT:
A flexible shaft with an inner sleeve defining a hollow core for chip removal. A cylindrical rod is wound right handed into a helical configuration about the sleeve, the convolutions of the rod being in close adjacency with one another. A flat band is wound left handed into a helical configuration about the rod, adjacent convolutions of the band being in nesting relationship with one another.

REFERENCES:
patent: 434748 (1890-08-01), Almond
patent: 2644669 (1953-07-01), Curtis et al.
patent: 2949753 (1960-08-01), Menoni
patent: 3000197 (1961-09-01), Ruegg et al.
patent: 3085406 (1963-04-01), Hanebuth
patent: 3347061 (1967-10-01), Stuemky

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