COUPLING FOR REINFORCEMENT ROD CONNECTION Russian patent published in 2015 - IPC E04C5/16 

FIELD: machine building.

SUBSTANCE: coupling for the connection of reinforcement rods with the internal thread comprising an inclined conical surface formed on the internal surface of the proposed coupling's bush, a holding spring is inserted and fixed in the internal thread. When a reinforcement rod is inserted inside the holding spring, the latter is closely pressed to the lower edge of the internal thread and its diameter is expanded so that the reinforcement rod slips inside. When the reinforcement rod is inserted and an external force is applied in the direction opposite to the direction of the reinforcement rod insertion, the holding spring moves along the inclined conical surface and its diameter is reducing thus holding the reinforcement rod.

EFFECT: possibility to connect and fix reinforcement rods easily due to the change of holding spring diameter at relatively simple design of the device.

5 cl, 2 tbl, 10 dwg