Cutting by use of rotating axially moving tool – Means to drive tool
Patent
1980-04-04
1982-11-09
Vlachos, Leonidas
Cutting by use of rotating axially moving tool
Means to drive tool
408 4, 408710, 279 1K, 279 62, B23B 3106
Patent
active
043582303
ABSTRACT:
The drill includes the usual tool spindle driven by reversible motor, and conventional chucking jaws which rotate with the spindle. The jaws are surrounded by an actuator which is drivingly connected to the jaws, and normally rotates with the jaws when the drill is in use. A manually operable control member on the housing is movable between two operating positions in each of which it holds the actuator against rotation, and consequently causes the spindle to move the jaws to bit-locking or bit-releasing positions, depending upon the direction or rotation of the spindle. Whenever the control member is moved from one to the other of its positions it switches the direction of rotation of the motor. A projection on the control member is releasably engagable selectively in a matching recess in the actuator to impart static loading to the jaws during movement thereof to their bit-locking positions, or in a larger recess in the actuator to impart dynamic loading to the chucking jaws during movement thereof to bit-releasing positions. Safety means is provided for preventing accidental movement of the control member from one to the other of its positions during use of the drill.
REFERENCES:
patent: 2716555 (1955-08-01), Rowe
patent: 2876369 (1959-03-01), Doerner
patent: 4085337 (1978-04-01), Moeller
patent: 4260169 (1981-04-01), Hall
patent: 4317578 (1982-03-01), Welch
patent: 4323324 (1982-04-01), Eberhardt
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