Patent ID: 6446531
Filing Date: 2002-09-10
Classification: B25B

Abstract:
An apparatus for installing a sprinkler riser into a sprinkler system connector which apparatus comprises:an elongated tube having internal threads, said tube being open at the distal end and open at the proximal end; a retainer mounted normal to said tube at the proximal end of said tube; a threaded shaft threadingly engaged with the internal threads of said tube disposed in said tube and extending upwardly out of said tube, said shaft having a terminus; said tube having a pair of similarly sized slots disposed slightly spaced up from the distal end of said tube, 180 degrees apart; said tube further including a threaded bore disposed between said slots and the distal end of said tube, normal to said slots; a pair of overlaid mirror image wings, disposed one per slot within said tube, each of said wings having an aperture at one end aligned with the aperture of the other wing; a set screw disposed through said bore and passing through said apertures to pivotally mount said wings for movement from a stowed position within said tube to an extended position outside of said tube by movement through a respective slot; a handle mounted to said shaft to rotate said threaded shaft within said tube whereby when said threaded shaft is threadedly engaged, said shaft terminus will urge the pivotally mounted blades from their stowed first position, to the extended second position and then retain the blades in said extended position such that the blades when extended bite into the internal wall of sprinkler riser such that rotation of the apparatus causes the riser to rotate in turn for engagement with the sprinkler system connector.