Abstract: A vacuum attachment device (10) contains a drill attachment portion (30) and a vacuum mounting portion (50). The drill attachment portion (30) is further composed of a longitudinally truncated cylinder section (32) and a lower funnel section (42). The cylinder section (32) has first and second snap-on arms (34) and (36) and a rear cylinder aperture (40). The lower funnel section (42) has a lower funnel connection aperture (44) which connects to the cylinder section (32) at the rear aperture (40). The vacuum mounting portion (50) contains a hose attachment section (52) and an upper funnel section (54). A vacuum mounting portion bonding surface (56) connects the vacuum mounting portion (50) to the drill attachment portion bonding surface (46) of the drill attachment portion (30).

Abstract: A force limiting cartridge comprises a housing and end cap which screw together to contain a slidable piston biased by a coil spring. The cartridge surrounds a conventional pull-up clamp. The bottom end of the cartridge pushes against the top layer of the laminate. The piston is pushed against the spring when the clamp screw is tightened. The piston is provided with a cross mark which when aligned with cross hairs on the housing indicate a desired clamping pressure has been attained. The cartridge can be calibrated to any desired pressure (depending on the spring's performance characteristics) by adjusting the total length of the housing/end cap assembly.