Hand drilling

Details Hand drilling Hand drilling

1978-06-16

1980-08-05

Peshock, Robert

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

318138, 318341, 318 67, 433133, A61C 1106

Patent

active

RE0303569

ABSTRACT:
A hand drill includes an induction motor energized by a multi-phase electrical power source with the angle between consecutive phase maintained substantially constant over a wide frequency range by energizing logical circuitry comprising a number of flip-flops intercoupled by AND GATES.

REFERENCES:
patent: 814380 (1906-03-01), Lamme
patent: 1725849 (1929-08-01), Cope
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patent: 2710372 (1955-06-01), McCleery
patent: 2714697 (1955-08-01), Small
patent: 2899745 (1959-08-01), Flatland
patent: 2917829 (1959-12-01), Page
patent: 2923871 (1960-02-01), Cohen
patent: 2987662 (1961-06-01), Jamieson
patent: 3034028 (1962-05-01), Jamieson
patent: 3178624 (1965-04-01), Borden

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