Abstract: A combination punch and rivet tool, the tool being adapted to be mounted on the end of a robot arm, the tool comprising a C frame having two opposed sides, a punch die mounted on one side of the C frame, an anvil slidably mounted on said one side adjacent the punch die and selectively movable between a first position away from the punch die and a second position over the punch die, and a combination cylinder mounted on the other side of the C frame opposite the punch die, the combination cylinder comprising a coaxial inner punch and an outer rivet forming tool.

Abstract: A pressure vessel (1) includes a pair of shells (2,3) which are suitably joined together. A flexible diaphragm (12) is disposed within the vessel and sealingly mounted to the vessel walls adjacent the joint. The lower shell wall (5) has a radially outwardly extending offset (17) and bulge (19) forming an interior groove (20) for receiving a projection (16) on the diaphragm. The bulge merges into an inwardly tapered wall (21) which in turn merges into an axial cylindrical wall (23) having a terminus edge (24). The upper shell wall (4) has a pair of spaced radially inwardly extending offsets (25,28). The upper (25) of said pair of offsets provides an abutment (26) receiving the terminus edge (24) of the lower shell. An axial cylindrical wall (29) between the pair of inward offsets press-fittingly engages the upper edge portion (23) of the lower shell.