Camming element for fastener

摘要

A camming element (1) for forming a joint between two members has a pair of jaws (15,16) for engaging a head of a dowel member. The camming element has a torque drive connector (10) which is radially offset to its rotational axis. The camming element has a top plate (22) which is designed to sit below the surface of its mounting member in use. The camming element may be concealed in use by a cover cap.

主权项

1. A camming element for a device for forming a joint between two members, the camming element comprising:
a first engagement element having a first cylindrical portion including an outer surface, a first curved camming surface extending from the first cylindrical portion and having a circumferential extent, extending along the entirety of the first engagement element and a first wall portion between the outer surface of the first cylindrical portion and the first curved camming surface; a second engagement element having a second cylindrical portion including an outer surface, a second curved camming surface and a second wall portion formed between the outer surface of the second cylindrical portion and the second curved camming surface, with the second engagement element axially spaced and coaxial with the first engagement element, with the outer surfaces of the first and second cylindrical portions defining an axis; and a slot between the first and second engagement elements, wherein the first wall portion is axially facing away from the slot and is perpendicular to the axis from the first camming surface to the first cylindrical portion; wherein the outer surface of the first cylindrical portion defines a constant width in an axial direction parallel to the axis along the entire extent of the first engagement element, wherein the width is greater than an axial thickness between the first wall portion and the slot along the circumferential extent of the first curved camming surface; with the first and second engagement elements rotatably mountable about the axis of the outer surfaces of the first and second cylindrical portions, in use, in a hole in one of the two members, with the first and second camming surfaces engageable, in use, with a head portion of a fastening element which is connectable, in use, to another of the two members, with rotation of the first and second engagement elements in a first direction serving, in use, to draw the two members together by action of the first and second camming surfaces pulling on the head portion of the fastening element.