Hand control system for power hand tools

Details Hand control system for power hand tools Hand control system for power hand tools

1973-07-23

1976-06-01

Purser, Ernest R.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

91459, 173 46, 173 57, 173163, 251131, A61C 105, A61C 108

Patent

active

039598837

ABSTRACT:
A hand control system for power hand tools comprises a manually operated control means for activating a low current electric signal and means for actuating an operation of the power tool. Circuit means are provided for sensing the low current electric signal when it is activated by the manually operated control means to provide a higher current operational signal to the tool actuating means. The manually operated control means may include various types of switch means. The finger-tip control means is located on a hand-piece unit of a power tool. The circuit means includes means for amplifying the low current electric signal and switching means for receiving an amplified current drive signal from the amplifying means and transmitting the higher current operational signal to the actuating means. A specific feature of this invention is the use of the manually operated control means in combination with a dental device having an air driven motor for tool members rotatably mounted in the hand-piece unit.

REFERENCES:
patent: 3346958 (1967-10-01), Sinatra et al.
patent: 3449831 (1969-06-01), Vandis
patent: 3543405 (1970-12-01), Banhart
patent: 3567330 (1971-03-01), Apelskog et al.

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