Abstract: Actuator apparatus (60) for a device such as a nail or staple gun having a linearly translating tool. The apparatus includes reciprocating means (64) for actuating the tool in a first direction. The apparatus includes a drive shaft comprising a sleeve element (67) rotatably fitted over the reciprocating means and adapted to be driven via rotatable drive means (63, 65). The apparatus includes means (73, 74, 75, 76, 77) for coupling the reciprocating means to the sleeve element such that when the sleeve element is rotated, the reciprocating means moves in a second direction opposite to the first direction. The reciprocating means moves in the second direction against the force of a biasing means (78) for storing potential energy in the biasing means. The apparatus includes means (86, 87, 89, 90) for uncoupling the reciprocating means from the sleeve element when the reciprocating means has moved a preset distance in the second direction.

Abstract: A riveting apparatus for fixing a rivet having a sleeve and a mandrel insertable through the sleeve. The apparatus includes a drive shaft adapted to be driven by a rotatable drive means such as a cordless electric drill or the like. The apparatus includes drivable means such as a mandrel engaging wheel for engaging and pulling the mandrel and means for pressing the mandrel against the drivable means. The pressing means is associated with the drivable means such that the drivable means operates the pressing means in response to the mandrel being pulled by the drivable means.