B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
B66F 7/10 (2006.01) A61G 3/06 (2006.01)
Patent
CA 2174382
A retractable lift/ramp apparatus is disclosed for moving a load between two vertically spaced surfaces. The apparatus includes a load supporting platform which is movable between a storage and operating position and one or more lever arms which are pivotally coupled to the platform. When the platform is moved to the operating position, each lever arm is pivotable relative to the platform about a pivot point, so that one end of each lever arm may be selectively moved along an arcuate path beneath the platform and into contact against the lower surface to raise or lower at least part of the platform. A pivot actuator mechanism, such as a scissor jack is provided to engage both the platform and a portion of the lever arm and is extensible or retractable to rotate the lever arm about the pivot point. Lifting is achieved by activating the pivot actuator to move one end portion of the lever arms selectively and progressively along its arcuate path against the lower surface. As the end of the lever arm moves against the lower surface, its opposite portion which is hingely coupled to the platform biases the platform upwardly or permits it to fall depending on the direction of lever arm movement.
Fenn James Graham
Riches Mckenzie & Herbert Llp
LandOfFree
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