Handling: hand and hoist-line implements – Grapple – Well type
Patent
1976-11-18
1978-07-11
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Well type
294 88, 294106, 308163, B66C 100
Patent
active
040997618
ABSTRACT:
A suspended material handling unit has a simplified, compact and economical thrust and limited rotational bearing means between relatively fixed and limited rotational components of the unit. Both lifting and down pressure reaction forces are transmitted through the double-acting thrust bearing in such a way that screws which connect a thrust bearing cap to the limited rotational component are relieved of the comparatively heavy down pressure reaction forces. The rotational bearing means immediately below the double-acting thrust bearing spans a substantial axial distance in the telescoped components and provides lateral stability in the unit.
REFERENCES:
patent: 2575830 (1951-11-01), O'Malley
patent: 2582433 (1952-01-01), Hitchcock
patent: 3211502 (1965-10-01), Lamson et al.
patent: 3301587 (1967-01-01), Heikkinen
patent: 3413029 (1968-11-01), Donovan
patent: 3751099 (1973-08-01), Billings
patent: 3877743 (1975-04-01), Johnson
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