Importance

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Abstract

A retainer for a rotating bit and/or pick that includes a slot extending from a forward end of the retainer to a distal end of the retainer. The slot includes a gap profile formed by the configuration or design of a first radial end surface of the slot and a second radial end surface of the slot. The retainer includes a dual corner break formed by a first angled surface extending from the distal end of the retainer to the first radial end surface of the slot and a second angled surface extending from the distal end of the retainer to the second radial end surface of the slot. In additional embodiments, the retainer can include any of or any combination of a lead-in chamfer at the distal end of the retainer, a relief notch extending from the distal end of the retainer, and a compression slot extending from the relief notch. The retainer may be used independently with the rotating bit or it may be used in conjunction with nearly butted or solid generally cylindrical hollow spacers and/or washers.

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First Claim