Abstract: A sliding door system includes a stationary door frame, a sliding door panel installed in the stationary door frame and movable between closed and open positions, and a handle assembly coupled to the sliding door panel. The handle assembly includes a handle spindle extending into a vertical stile of the sliding door panel, a cam coupled to the handle spindle within the vertical stile and movable between stowed and extended positions, and a handle coupled to the handle spindle and rotatable about a pivot axis extending through the handle spindle between first and second positions. Rotating the handle from the first position to the second position causes the cam to move from the stowed position to the extended position and into engagement with the stationary door frame, whereby the sliding door frame is forced away from the stationary door frame from the closed position to the open position.

Abstract: Broadly stated, the present invention encompasses tetranuclear sulfide-bridged complexes of Cr(III) having bridging organo-carboxylate ligands. Indeed, in one embodiment, the present invention is directed toward a novel composition of matter having a complex cation of the general formula Cr.sub.4 S(RCO.sub.2).sub.8 (L).sub.4.sup.2+, wherein R represents alkyl groups having from 1 to 12 carbon atoms, L represents a ligand or ligands containing a donor atom selected from oxygen, nitrogen, carbon, and sulfur. In the complex of the present invention, the four Cr(III) atoms are bound to a central tetrahedral sulfur atom. The chromium atoms also are octahedrally coordinated with bridging carboxylates and the ligand molecule. Also, the bridging carboxylates, RCO.sub.2 of the above formula, are the same or different carboxylates.

Abstract: An excavation tool, specifically, a down-the-hole bit which reduces a formation by being impacted axially against a formation while rotating and through which a supply of fluid, such as air, is supplied through a passage in the bit to the working face thereof to blow away the material taken by the bit and wherein the working face of the bit is provided with grooves extending outwardly from the lower end of the fluid supply passage to the periphery of the bit and in communication with axial grooves formed in the bit. The provision of the grooves in the working end of the bit in communication with the axial grooves in the outer periphery of the bit greatly improves the removal of debris which accumulates at the bottom of the hole being drilled and increases the efficiency of the bit.