High strength, non-metallic coupling
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsSteven D. Chard, W. A. Loker, John T. Meredith
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Abstract
A torque coupling comprising two non-metallic inserts linked together by a lip-fitted shaft having a multi-sided cross-section. One of the inserts is press-fitted into the internal involute shaft of a driving mechanism, such as a gear box, while the other is similarly fitted into the internal involute shaft of a driven mechanism, such as a pump. The multi-sided configuration of the slip fitted shaft permits the torque load to be distributed compressively on the inserts. Consequently, greater torque loads can be transmitted by the coupling with the benefit of the low-wear, self-lubricating characteristics of certain non-metallic insert materials.
Claims6
A coupling for transmitting high torque rotational forces between internal involute shafts, comprising:
- at least two rigid non-metallic inserts press-fitted one each into said internal involute shafts, said inserts having bores of multi-sided configuration, said inserts having means on their outside circumference for coupling said inserts to said internal involute shafts;
- a metallic shaft of multi-sided configuration slip-fitted into said insert bores;
- said multi-sided configurations of said metallic shaft and insert bores comprising a plurality of tooth-like splines substantially flat along their sides, whereby said inserts are evenly, symmetrically, and compressively loaded.
Dependencies are inferred from the claim text.