Retention means

Claim 1

The combination comprising a. a pair of metal members having matable faces; b. said members having aligned apertures extendthere through; c. a solid metal shaft provided with a forward and a rearward end; d. said shaft extending through said apertures for holding said matable faces in face to face contact; e. a plurality of transverse annular lands; f. said matable faces being disposed intermediately of two adjacent lands; g. each of said annular lands having forward and rearward ends; h. said annular lands including aligned outer surfaces being generally cylindrical and extending along the length of said shaft between said forward and rearward ends and parallel to the central axis of said shaft; i. said annular lands having a greater diameter than said apertures and being press fitted therein with said outer surfaces engaging the internal surfaces of said apertures whereby said members are subjected to stress; j. said stress inducing said metal to flow between said annular lands when they are pressed fitted into said aperture, thereby tending to relieve said stress; k. said material flow only partially filling the gap between said annular lands; l. an inclined annular surface intersecting the forward end of each of said annular lands and extending toward the forward end of said shaft and intErsecting said shaft at a point spaced from the adjacent forward annular land, the surface of said shaft being cylindrical between the inclined annular surface and the adjacent forward annular land; m. said inclined annular surface being inclined sufficiently to cause the material flow to resist forward axial movement of said shaft relative to said members; n. the forward end of said shaft being threadedly engageable with a nut; o. the rearward end of said shaft being provided with a head.