Safety arrangement for a hand-held, power-driven portable tool

Details Safety arrangement for a hand-held, power-driven portable tool Safety arrangement for a hand-held, power-driven portable tool

1983-05-02

1985-10-01

Peters, Jimmy C.

Cutlery

Cutting tools

Saw

30382, 30390, 83DIG1, 200 6157, B27B 1702

Patent

active

045437238

ABSTRACT:
The invention is directed to a safety arrangement for a power-driven portable tool such as a motor-driven chain saw or the like. The portable tool has a housing equipped with two handles both of which are grasped by the operator to hold and guide the tool during use thereof. One of the handles is a bail handle mounted at the forward part of the housing. The safety arrangement includes two switches associated with respective ones of the handles. The switches are operatively connected to the motor so as to cause the same to be operative only when both switches are closed. At least a portion of one of the contacts of the bail handle switch is displaceable from a first position whereat the bail handle switch is open to a second position whereat the switch contacts come into mutual contact and the bail handle switch is closed. An elastic body associated with the bail handle acts on the one contact to effect the displacement to the second position in response to pressure applied to the elastic body by the operator of the tool when grasping the bail handle.

REFERENCES:
patent: 2575926 (1951-11-01), Murray
patent: 2945099 (1960-07-01), Mayhew
patent: 3559206 (1971-01-01), Beecham
patent: 3711946 (1973-01-01), Troutman
patent: 4006528 (1977-02-01), Katsuya
patent: 4088856 (1978-05-01), Tebben
patent: 4378637 (1983-04-01), Kieser
patent: 4432139 (1984-02-01), Kohler

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