Rb&w Manufacturing LLC

R B & W Corporation

Iscreen Vision, Inc.

David E Thomas

Ronald D Goforthe

Fred A Boczar

Ross A Kennedy

A fastener includes a nut having an anterior portion, a posterior portion and a threaded bore with a center axis extending from the anterior portion to the posterior portion, the outer surface of the posterior portion having an annular camming surface concentric with the center axis, the camming surface having a radius that decreases along the direction of the center axis away from the anterior portion toward the posterior portion; and a sleeve having a first end having an internal annular camming surface that engages the nut camming surface concentrically with the center axis and a second end having a thrusting surface. Tightening the fastener on an externally threaded member applies a force to the thrusting surface parallel to the center axis resulting in the nut camming surface and the sleeve camming surface cooperating to compress a portion of the threaded bore toward the threaded member.

Nut and sleeve fastener

A washer for a male or female threaded fastener includes an annular ring portion and a seat portion with a cantilever portion extending therebetween. The washer hardness is selected to exceed the threaded fastener hardness by an amount that enhances the elastic deflection of the washer and reduces the tendency of the fastener to loosen. The selected hardness relationship also reduces the washer diameter dilation during loading and the permanent deformation of the washer diameter.

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Kent, OH, United States of America

David E Thomas