Tube clamping fastener

Claim 1

A fastening device for the attachment of tubing or the like to a support surface, comprising a shank, a head member at one extremity of the shank and a support surface penetrating point at the opposite extremity, the head member including at least one tubing receiving and clamping recess opening toward the penetrating point of the shank, the peripheral surface of the recess defining top and opposing side wall portions, an inner side wall portion disposed adjacent the shank axis and an outer side wall portion spaced outwardly from the shank axis with the lowermost extremities of the side walls defining the mouth of the recess, a flexible recess liner means mounted on the device for juxtaposed relationship with the peripheral surface of the recess, the recess liner, in cooperation with the recess, defining a predetermined mouth opening which is at least as great as the maximum transverse dimension of an associated tubing to permit entry of the tubing into the recess, the head including a bight portion interconnecting a leg portion extending downwardly therefrom, the inner surface of the leg portion forming the outer side wall of the recess, said outer side wall surface including a segment adjacent the lowermost extremity of the leg which is angled toward the shank, the lowermost extremity of the recess linear means being mounted intermediate the penetrating point and the mouth of the recess wherein the liner means is adapted to be forced upwardly on the device to generally follow the contour of the peripheral surface of the recess as the shank is driven into the support surface, the angled segment directing the liner means inwardly toward the shank decreasing the predetermined mouth opening beneath the associated tubing.