Multiple sheave mechanism with overlapping fit

Details Multiple sheave mechanism with overlapping fit Multiple sheave mechanism with overlapping fit

1984-04-26

1986-02-04

Leppink, James A.

Endless belt power transmission systems or components

Structure facilitating lubrication of belt, pulley, or guide...

474168, 474199, F16H 5704

Patent

active

045683166

ABSTRACT:
The multiple sheave mechanism is primarily intended for use on the outer end of a long boom of a crane. The mechanism includes a plurality of sheaves that have hubs supported for rotation on a shaft by anti-friction bearings. Each of the hubs have a cylindrical inner flange on one side and a cylindrical outer flange on the other side, and the hubs are axially spaced from each other with the outer flanges overlapping the inner flanges. The outer flange on one end sheave overlaps an annular retainer, and a second retainer overlaps the inner flange on the other end sheave. The cooperating flanges and retainers define circuitous passages which are filled with lubricant for providing a mechanical seal and a fluid seal which minimizes entry of dirt, dust and other debris into the bearings and maximizes the interval between required relubrication.

REFERENCES:
patent: 2473513 (1949-06-01), Dewey
patent: 2740647 (1956-04-01), Van Pelt
patent: 3125126 (1964-03-01), Engels

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