US PATENT SUBCLASS 172 / 271
.~ Frangible lock (e.g., shear pin, etc.)


Current as of: June, 1999
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172 /   HD   EARTH WORKING

261  DF  OVERLOAD SHIFTING {6}
271.~ Frangible lock (e.g., shear pin, etc.)


DEFINITION

Classification: 172/271

(under subclass 261) Apparatus wherein the element is rigidly held in place by means destructible upon the occurrence of a predetermined overload.

(1) Note. The destructible means is usually a break pin.

SEE OR SEARCH CLASS

280, Land Vehicles,

451, for articulated vehicles having an overload release of the frangible type.