B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
B66F 7/06 (2006.01) B66F 7/28 (2006.01)
Patent
CA 2542817
A scissor lift includes an energy storage device that stores energy as the payload is lowered, and provides further lift to the payload as the payload is raised. This allows the scissors to achieve a support angle of up to 180° between the two arms (down to 0° between the screw drive and the lowest arm of the scissors), making the inventive scissor lifts considerably more compact than prior art lifts. The energy storage device is preferably a helical wire spring, but can alternatively be any suitable spring, piston, or even an elastomeric mass. Side to side movement of the scissors arms can be restricted using a thrust bearing with hardened washers at the inter-arm pivot, and/or a guided connector that transmits motive force to the scissors.
Finlayson & Singlehurst
Hanlon Engineering Inc.
LandOfFree
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