Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes gear on support mating with stationary rack or chain
Patent
1994-08-30
1996-06-18
Terrell, William E.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes gear on support mating with stationary rack or chain
187267, 187268, B66B 902
Patent
active
055269036
ABSTRACT:
A stage or support platform assembly for use in a synchrotron accurately positions equipment to be used in the beam line of the synchrotron. The support platform assembly includes an outer housing in which is disposed a lifting mechanism having a lifting platform or stage at its upper extremity on which the equipment is mounted. A worm gear assembly is located in the housing and is adapted to raise and lower a lifting shaft that is fixed to the lifting platform by an anti-binding connection. The lifting platform is moved vertically as the lifting shaft is moved vertically. The anti-binding connection prevents the shaft from rotating with respect to the platform, but does permit slight canting of the shaft with respect to the lifting platform so as to eliminate binding and wear due to possible tolerance mismatches. In order to ensure that the lifting mechanism does not move in a horizontal direction as it is moved vertically, at least three linear roller bearing assemblies are arranged around the outer-periphery of the lifting mechanism. One of the linear roller bearing assemblies can be adjusted so that the roller bearings apply a loading force against the lifting mechanism. Alternatively, a cam mechanism can be used to provide such a loading force.
REFERENCES:
patent: 2587757 (1952-03-01), Panter
patent: 2627321 (1953-02-01), Brubaker
patent: 3468401 (1969-09-01), Letz
patent: 4768621 (1988-09-01), Kunii
Barraza Juan
Shu Deming
Reichard Dean A.
Terrell William E.
The University of Chicago
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