Abstract: Apparatus are disclosed for securing an implement to a rigid longitudinally extended lifting member. A representative embodiment comprises a clamp that can be mounted to a forklift implement and/or socket for receiving a lifting member. A working surface engages the lifting surface of the lifting member. A cam is pivotably mounted on an axis transverse to and displaced from the working surface. The cam has an outwardly radiating spiraled engagement lobe that presses against the under-surface of the lifting member so as to press the lifting member between the working surface and the cam. Thus, the cam allows the clamp to be moved rearwardly but not forwardly on the lifting member. The cam, which is biased, can be characterized by having a fixed axis, being self-locking, and/or having a constant contact angle with the underside of the lifting member.

Abstract: A method and apparatus are disclosed for securing a manbasket to the tines of a lifting fork of a forklift. A preferred embodiment comprises a tine clamp mounted to a tine socket on the manbasket. The clamp automatically applies a self-adjusting gripping force to the underside of the tine whenever the fork has elevated the manbasket and automatically releases the tine when the manbasket is resting upright on a reference surface. The tine clamp comprises a lever pivotably mounted at mid-length to the tine socket, at least one gripping cam rotatably mounted to one end of the lever, and a cam release member pivotably mounted to the opposite end of the lever. The lever is biased to keep the gripping edge surface of the cam in contact with the underside of the tine whenever the tine is in the socket and the manbasket is elevated. The cam has an outwardly spiraled profile to enable it to apply a gripping force to the tine that increases as the tine is urged more strongly out of the socket.

Abstract: A manbasket testing apparatus for use in the trial lift and proof testing of personnel work platforms known as manbaskets is disclosed. The testing device provides a manbasket supported by a floor attached sling and providing a removable test weight attached through and underneath the floor of the manbasket by the use of eyebolts attached to the test weight and extending through the floor with attachment rods slid transversely through the eyebolts. A method of testing using the manbasket testing apparatus is also disclosed.