Boring or penetrating the earth – With tool shaft detail
Patent
1980-07-11
1982-11-30
Callaghan, Thomas F.
Boring or penetrating the earth
With tool shaft detail
285176, 285401, 403348, 403350, 403383, E21B 1700
Patent
active
043611966
ABSTRACT:
A quick release, high torque coupling for interconnecting the bit and drive member in a mine roof drill has axial-locking and torque-transmitting structure integral with the drill members. A plug on the drive member is adapted to be releasably received within a mating socket in the bit and has an axial-locking segment on its outermost end complementally configured with respect to an acircular constriction in the socket to permit insertion of the axial-locking segment into the socket beyond the constriction. A torque transmitting segment on the plug cooperates with the constriction to limit relative rotation of the bit and drive member between oppositely directed torque-transmitting positions. In one of the torque-transmitting positions, the constriction and axial-locking segment are misaligned such that the plug is restrained against axial retraction from the socket.
REFERENCES:
patent: 2122244 (1938-06-01), Brown
patent: 3104532 (1963-09-01), Severinsson
patent: 3304816 (1967-02-01), Galorneau
patent: 4009760 (1977-03-01), Hansen et al.
patent: 4086972 (1978-05-01), Hansen et al.
patent: 4099585 (1978-07-01), Emmerich
patent: 4226290 (1980-10-01), McSweeney
Callaghan Thomas F.
Carmet Company
LaPierre John L.
Williamson John K.
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