Brakes – Wheel – Positive lock
Patent
1983-06-17
1984-08-28
Butler, Douglas C.
Brakes
Wheel
Positive lock
192148, B62C 702
Patent
active
044678967
ABSTRACT:
A locking mechanism for a rotary power machine, such as a hand-held power tool, includes a housing-mounted locking pin manually actuatable from a retracted position to an extended, operative position in which the lock pin is received within a pin-receiving bore formed in one of the power transmitting components of the machine. A wedge-like cam or ramp is positioned adjacent to the pin-receiving bore to engage the extended end of the lock pin when the rotating components of the machine are in motion to lift the lock pin away from the pin-receiving bore to prevent accidental engagement of the locking mechanism while machine components are moving. In the preferred embodiment, an output gear is provided with a plurality of ramps and associated pin-receiving bores and is formed as a unitary part using powdered metal fabricating techniques.
REFERENCES:
patent: 3872951 (1975-03-01), Hastings, Jr.
patent: 3899852 (1975-08-01), Batson
A. E. G. Catalogue No. WS 601, Angle Grinder, Jan. 1982.
Dibbern, Jr. John E.
Sauerwein William D.
Weber Steve A.
Black & Decker Inc.
Butler Douglas C.
Sherer Ronald B.
Weinstein Harold
Yocum Charles E.
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