Multiple sheave mechanism with overlapping fit
First Claim
1. In a multiple sheave mechanism having a plurality of sheaves including end sheaves supported on a shaft by a plurality of bearing means, each of said sheaves including a hub and including means for directing a lubricant into said bearings;
- the improvement which comprises.means defining a cylindrical inner flange on one side of each hub;
means defining a cylindrical outer flange on the other side of each hub;
means for spacing the sheaves axially from each other with said outer flange overlapping associated inner flanges;
first annular retaining means mounted on said shaft and positioned closely adjacent to and disposed partially within the outer cylindrical flange on the hub of one end sheave, andsecond annular retaining means mounted on said shaft and positioned closely adjacent to and partially encompassing the inner cylindrical flange on the hub of the other end sheave.
1 Assignment
0 Petitions
Accused Products
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.
10 Citations
8 Claims
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1. In a multiple sheave mechanism having a plurality of sheaves including end sheaves supported on a shaft by a plurality of bearing means, each of said sheaves including a hub and including means for directing a lubricant into said bearings;
- the improvement which comprises.
means defining a cylindrical inner flange on one side of each hub; means defining a cylindrical outer flange on the other side of each hub; means for spacing the sheaves axially from each other with said outer flange overlapping associated inner flanges; first annular retaining means mounted on said shaft and positioned closely adjacent to and disposed partially within the outer cylindrical flange on the hub of one end sheave, and second annular retaining means mounted on said shaft and positioned closely adjacent to and partially encompassing the inner cylindrical flange on the hub of the other end sheave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the improvement which comprises.
Specification