Power tool system including adapter and coupling member therefor

Details Power tool system including adapter and coupling member therefor Power tool system including adapter and coupling member therefor

1988-02-04

1989-04-04

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Means to drive tool

Including means to move tool along tool-axis

173 36, 175320, 248565, 248615, 248674, 408710, 408714, B23B 4514, E21C 1100

Patent

active

048181552

ABSTRACT:
A power tool combination including a hammer drill, an adapter secured to the drill for attaching it to an elongated rod which bears on the floor, a pneumatic cylinder and piston unit mounted between the elongated rod and the drill for applying an uniform external force for moving the power drill into the ceiling, and a coupling member between the pneumatic piston and cylinder unit. The coupling member is rigid for transmitting axial forces therethrough under normal operating conditions but is capable of yielding to absorb abrupt shock forces in the event that the drill encounters an undesirable obstruction in the ceiling, the coupling member including structure for causing it to return to a normal rigid condition after the shock forces have been absorbed.

REFERENCES:
patent: 1988295 (1935-01-01), Berry
patent: 2381102 (1945-08-01), Boyd
patent: 2405110 (1946-08-01), Bullock
patent: 2643088 (1953-06-01), Hornack
patent: 2722812 (1955-11-01), Golasky
patent: 2917953 (1959-12-01), Badali
patent: 3999776 (1976-12-01), Betts, Sr.
patent: 4724279 (1988-02-01), Ayscue
patent: 4736804 (1988-04-01), Geibel

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