GB667819A - Improvements in or relating to tools for upsetting hollow tubular rivets - Google Patents

Abstract

667,819. Blind riveting. GOODRICH CO., B. F. Feb. 9, 1950 [June 1, 1949], No. 3337/50. Class 43. A hand-operated tool for setting internally threaded, hollow rivets 19 comprises a body 10 having a threaded bore 11 which receives a screw structure 15, an extension 17 of which passes through an anvil 23 and has a screw -threaded rivet-engaging end 18, said body and anvil being mounted for relative rotation in thrust-transmitting relation, whilst relative axial movement of the body and screw structure, brought about by relative rotation, sets the rivet. The body 10, anvil 23, and an annular thrust bearing 27 mounted between them are held in position by a sleeve 28, the ends of which are spun over flanges 13, 25 of the body and anvil respectively. In use the head 16 of the screw structure is held stationary while the body 10 is rotated to extend the rod end 18, so that a rivet can be screwed thereon until its head engages the anvil 23; the rivet shank is then inserted in the workpiece, and a hexagonal L-shaped bar wrench 21 is inserted in a hexagonal socket 20 in the head 16 of the screw structure. The wrench 21 is used to hold the latter from rotating while the body 10 is turned to set the rivet by means of an openended wrench 50 which is engaged with the polygonal outer surface 12 of the body 10. The wrench 50 is then used to hold the body 10 from turning while the wrench 21 is rotated to withdraw the rod from the rivet. Instead of having a socket 20 engaged by the wrench 21, the head 16 may have a polygonal outer surface engaged by an open-ended wrench, or may have capstan holes engaged by a straight capstan bar wrench. In a modification, Fig. 4 (not shown), the screw structure is axially bored to receive a removable draw rod having a head which fits tightly in a hexagonal socket in the head of the screw structure so that relative rotation is prevented, and the bore of the anvil is adapted to receive a removable bushing, so that by varying the rod and bushing rivets of different sizes may be set by the same tool.