Patent ID: 7392679

Claim:
A hydroform seal assembly comprising: a seal housing; an annular nozzle carried by the seal housing and sized to insert into the open end of a tube to be hydroformed; a first actuator to move the seal housing toward the open end of the tube so that the nozzle is inserted into the tube; a plurality of jaws carried by the housing and movable radially inward into clamping engagement with the tube to clamp the tube onto the annular nozzle; a cam bushing movably mounted within the seal housing and surrounding the jaws, said cam bushing and said jaws having complimentary cam surfaces thereon by which movement of the cam bushing relative to the jaws will cam the jaws radially inward; a backup cam movable within the seal housing relative to the cam bushing, said back up cam and said cam bushing having complimentary cam surface thereon by which movement of the backup cam will forcibly move the cam bushing relative the seal housing; and a second actuator for moving the backup cam.