Automatically-releasable pipe-attachment device

Claim 1

Pipe-attachment apparatus for attaching an elongated pipe to a concrete form wall, with an axis of said pipe extending laterally away from said form wall said apparatus including: a first attachment means for being attached to said concrete from wall, said first attachment means helping to support said pipe on said concrete form wall; a second attachment means separate from said first attachment means and said pipe, said second attachment means defining a radially outwardly directed surface for tightly contacting a radially inwardly directed, internal surface of said pipe to have frictional engagement therewith, thereby helping to support said pipe on said concrete form wall, said second attachment means contacting only said radially inwardly directed internal surface of said pipe; one of said first or second attachment means including an axially extending protrusion having a length of less than approximately 1 inch and the other including an axially extending cavity for slidably receiving said protrusion, said protrusion defining a radially outwardly directed protrusion surface means and said cavity being defined by a radially inwardly directed cavity surface means, said protrusion and cavity surface means being of approximately the same size for fitting tightly together but allowing sliding axial movement between them without damaging either member, means for attaching said first attachment means to said concrete form wall to permit said sliding axial movement, said protrusion and cavity surface means thereby aiding in supporting said pipe on said concrete form wall during a pouring of concrete, but after the concrete is cured allowing the form wall to be removed in an axial direction with said first and second attachment means easily sliding away from one another leaving the first attachment means on the concrete-form wall and the second attachment means on said pipe.