B - Operations – Transporting – 66 – F
Patent
B - Operations, Transporting
66
F
214/15
B66F 9/08 (2006.01) B65G 1/04 (2006.01) B66F 9/14 (2006.01)
Patent
CA 1062204
APPLICATION OF: GEORGE R. PIPES FOR: SHUTTLE ASSEMBLY FOR A LOAD HANDLING APPARATUS A B S T R A C T An improved shuttle assembly for use on a load handling apparatus, the shuttle being of the type which moves between a retracted position and an extended position. The shuttle assembly has a base plate which remains stationary and includes a gear train in driving engagement with a rack on the underside of a driver plate to move the driver plate longitudi- nally relative to the base plate. The driver plate includes at least one gear which rotates in a normally horizontal plane and engages a rack which remains fixed relative to the base plate, so that the gear rotates in response to longitudinal movement of the driver plate. Adjacent the periphery of the gear is a roller or a cam follower which drivingly engages a channel attached to the underside of an intermediate member, thus causing the intermediate member to move relative to the driver plate at a velocity which is generally sinusoidal. A load supporting top plate is driven at a sinusoidal velocity twice that of the intermediate member by means of a chain drive having one end attached to the base plate, the other end attached to the top plate, and passing around a sprocket attached to the intermediate member. The load supporting top plate is therefore able to move between the retracted position and the extended position at a substantially greater average velocity, requiring only a simple, one-speed input, and the preferred sinusoidal velocity improves the load control capability because the load moves slowly at the beginning and end of the travel.
258721
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