Tube clamp

Claim 1

A tube clamp affording two alternate passages for a tube to extend therethrough, comprising: a pair of identical, tube-engaging, square blocks adapted to be secured together with inner faces in contact with each other and with an outer generally flat face and flat side walls, on each said block, a pair of bolts for clamping said members together, each said inner face being provided with a first generally semicylindrical groove, the said first grooves of the pair of blocks cooperating to provide a first generally cylindrical through opening perpendicular to two pairs of said side walls for receiving a tube therein, each said inner face also being provided with a second generally semicylindrical groove perpendicular to said first groove and to the other two pairs of side walls and cooperating as a pair to form a generally cylindrical second though opening for receiving a tube therein as an alternate position for said tube, each block having a first pair of bolt holes near the extremities of one diagonal across said outer faces and a second pair of bolt holes near the extremities of the other diagonal across said outer faces, said outer face having a bolt-head receiving recess around each of said second pair of holes, said recess having a shape complementary to the head of said bolt to prevent turning of said head when said bolt in its said hole, and interengaging elements on the inner face of each said block to prevent said securement together in face-to-face relation except when said first and second grooves cooperate as pairs, said first pair of holes of one block then being aligned with said second pair of holes of the other block, said flat surfaces of said outer faces enabling a nut to be turned on each flat surface when such nut is in threaded engagement with one of said bolts.