Abstract: An orbital threaded fastener assembly includes an orbital nut or bolt and a split thread ring. Each of the nut or bolt and the thread ring has formed thereon a series of alternating, coaxial, circumferential grooves and teeth sized to mateably engage each other. These grooves and teeth can be formed on either the internal surface of the nut and the external surface of the ring or the external surface of the bolt and the internal surface of the ring. In use, the diameter of the ring is resiliently expanded or contracted to permit it to be disposed at a desired axial position along the nut or bolt to engage each other, thereby preventing relative axial movement of the parts while accomodating relative rotational movement thereof. The surface of the ring opposite that carrying the grooves and teeth is threaded to permit threaded coupling to an associated threaded component.

Abstract: A rescue tool comprising a housing, a pair of spreader arms each including a working portion and a driven portion and a pivot point therebetween, wherein the driven portion of each spreader arm contains an arced portion which touches the arced portion of the other spreader arm, a pair of links having first and second ends, a drive means reciprocally moveable between retracted and extended positions along an axis of movement, a first pivotal coupling means for coupling the driven portion of the spreader arm to the first end of the associated links, a second pivotal coupling means for coupling the second end of the associated links to the drive means, a third pivotal coupling means for coupling the spreader arm pivot point to the housing, the second coupling means being located between the first pivotal coupling means and the working portion when measured along the axis of movement.