| 摘要 |
<p>1326380 Lock nuts and bolts STANDARD PRESSED STEEL CO 1 Oct 1970 [3 Oct 1969] 46660/70 Heading F2H A lock nut or bolt of the parent Specification, having a bearing face formed by a smooth annular rim 18 or 88 surrounding an array of substantially radial teeth 20 the crests 82 of which intersect at their outer ends with the inner periphery of the rim, is modified in that the rim is at an angle to the tooth crests when viewed in longitudinal cross-section. The tooth crests may lie in a frusto-conical envelope or in a radial plane. The roots of the teeth may be defined by curved lines.</p> |
