Actuator for the release of an automatic emergency brake of a ha

Details Actuator for the release of an automatic emergency brake of a ha Actuator for the release of an automatic emergency brake of a ha

1984-04-12

1986-03-04

Argenbright, Tony M.

Brakes

Operators

Automatic

30382, F16D 5902, B27B 1702

Patent

active

045735565

ABSTRACT:
Actuator for the release of automatic emergency brakes of hand-operated, powered tools, such as chain saws, having a driving shaft for the tool. Such emergency brakes are constituted of a brake mechanism released by means of stored energy. The actuator is constituted of a rotatable and balanced body with a small amount of friction on a shaft situated essentially parallel to the driving shaft. The actuator is fabricated of a permeable material, and has a mass having an essential inertia against rotation on the shaft. The actuator cooperates firstly with a magnet retaining the actuator with a predetermined magnetic force against rotation in an angular position of the actuator, and then with a sensor which is so arranged that an impulse for releasing the brake mechanism is given as soon as the actuator comes out of said angular position.

REFERENCES:
patent: 3664390 (1972-05-01), Mattsson et al.
patent: 3785465 (1974-01-01), Johansson
patent: 3839795 (1974-10-01), Dooley
patent: 4152833 (1979-05-01), Phillips
patent: 4335514 (1982-06-01), Overy et al.
patent: 4402138 (1983-09-01), Glockle et al.

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