Chuck for use in driving lag rods with a drill having a reversib

Details Chuck for use in driving lag rods with a drill having a reversib Chuck for use in driving lag rods with a drill having a reversib

1986-08-04

1987-08-04

Weidenfeld, Gil

Chucks or sockets

Threaded grip

81 532, B23B 3110, B25B 1350

Patent

active

046841385

ABSTRACT:
A chuck attachable to a drill powered by a reversible motor, is adapted for use in driving lag rods into wooden supports and has an axial bore extending therethrough which is partly threaded from one end to receive the machine-threaded end of a lag rod. A plug member is screwed into the threaded end of the bore of the chuck and has a formation enabling it to be so turned as to be seated at the inner end of the threads for engagement by the extremity of the machine threaded end of the lag rod. In order to so reduce the frictional engagement between the plug member and the extremity of the lag rod, the area of the engaged extremities is limited thus to ensure the release of the lag rod when the motor is reversed after the lag rod has been driven into the support to a desired extent.

REFERENCES:
patent: 460716 (1891-10-01), Ferguson
patent: 540989 (1895-06-01), Keyes
patent: 1566691 (1925-12-01), Perry
patent: 2775153 (1956-12-01), Parhaniemi
patent: 2800820 (1957-07-01), Retterath
patent: 3239233 (1966-03-01), Stillwagon, Jr.
patent: 3368430 (1968-02-01), Levering

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