| 摘要 |
A coupler for engaging ball-type hitches, having a movable jaw or tumbler controlled by a handle secured thereto such that both rotate about a common axis which is positioned below the center of the engaged ball and such that the jaw is rotatable upwardly and away from the ball to disengage the coupler therefrom. The jaw is positioned generally opposite a socket portion of the coupler housing to entrap the ball therebetween, and the housing defines a recess which receives said handle to lock the coupler in a ball-engaging condition, there being a spring which biases the handle toward such recess.
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