Device for changing bore crowns

Details Device for changing bore crowns Device for changing bore crowns

1975-04-21

1978-01-03

Simpson, Othell M.

Metal working

Means to assemble or disassemble

By deforming

29 26A, 29240, 175 85, 211 15, 408 35, 175 52, B23Q 3157, E21C 1904

Patent

active

040658457

ABSTRACT:
A device for changing bore crowns on a drill rod including a bore crown magazine member and means for automatically stopping and locking the magazine member in a desired rotated position.

REFERENCES:
patent: RE25670 (1964-10-01), Hansen et al.
patent: RE25812 (1965-06-01), Morgan
patent: 3976149 (1976-08-01), Granholm et al.

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