US PATENT SUBCLASS 280 / 452
.~.~.~.~ Pivoted jaw or hook

Current as of: June, 1999
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280 /   HD   LAND VEHICLES

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
446.1  DF  .~.~ Condition responsive connections {4}
449  DF  .~.~.~ Overload release {3}
452.~.~.~.~ Pivoted jaw or hook {3}
453  DF  .~.~.~.~.~> Linear motion hook release
454  DF  .~.~.~.~.~> Double link retainer
455  DF  .~.~.~.~.~> Resilient keeper

DEFINITION

Classification: 280/452

(under subclass 449) Devices which include a coupling member having at least one element in the form of a retaining hook or jaw to receive a complementary coupling element and being pivoted about an axis transverse to the direction of draft, the hook or jaw being movable about the pivot in response to overload to release the complementary coupling element.

SEE OR SEARCH CLASS

172, Earth Working,

265+, for an earth working tool swingable about a fixed axis on the occurrence of an overload.