Traversing hoists – Overhead – Cable
Patent
1976-01-26
1977-04-12
Werner, Frank E.
Traversing hoists
Overhead
Cable
212 9, 212 42, B66C 2300
Patent
active
040169928
ABSTRACT:
The load-lifting mechanism at the front of a lift truck carries a vertical boom with a forwardly cantilevered boom portion rotatably mounting a vertical pivot shaft at its forward end. The shaft suspends a rotatable carriage frame beneath the cantilevered boom portion. A larger pickup carriage frame with downwardly extending pickup arms is suspended by chains from the rotatable carriage frame. The upper ends of one pair of pickup arms are pivoted for limited movement transversely of the longitudinal axis of the carriage frames and for upwardly swinging movement to positions alongside the carriage frames. Fluid cylinders on the rotatable frame adjust the pickup frame for side shifting, end shifting, transverse sloping and longitudinal sloping movement. A rotation mechanism for rotating the pivot shaft and thus both of the suspended carriage frames and their load includes a first fluid cylinder connected between the cantilever boom and a floating lever rotatably mounted on the pivot shaft and a second fluid cylinder connected between the floating lever and a second lever fixed to the shaft. Stroking of these cylinders rotates the shaft and thus the carriage frames and their load through more than 180.degree. in opposite directions about the vertical axis of the shaft.
REFERENCES:
patent: 3487964 (1970-01-01), Riley
patent: 3498473 (1970-03-01), Spaulding et al.
patent: 3589540 (1971-06-01), Kinross
patent: 3730365 (1973-05-01), Herpich et al.
patent: 3764032 (1973-10-01), Ward
Larsen Richard L.
Robnett James J.
Oresky Lawrence J.
Raygo Wagner, Inc.
Werner Frank E.
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