Abstract: A roof truss and decking system having trusses constructed with multiple truss blocks (8) stacked end to end with crush plates (14) in between. Keystones (16) are placed at the apex of the trusses or the crush plates (14) wedge shaped forming the trusses into arches. Truss blocks (8), keystones (16) and crush plates (14) are compressed together and strengthened with wire ropes (20). Wire ropes (20) run through wire rope receiving channels (30) in the truss blocks (8), through the curved wire rope receiving channels (46) in the keystones (16), and through wire rope slots (34) in the crush plates (14). Tensions of the wire ropes (20) are transmitted to the feet of the trusses at the tie plates (12). Tiebeam wire ropes (21) are added to each truss from the tie plate (12) on one foot to the tie plate (12) on the other foot preventing the truss' feet from spreading. The trusses are spaced apart and the spaced between is covered with spacer plates (10) resting in grooves (26) at the top of the truss blocks (8).

Abstract: Portable brick manufacturing apparatus (20) mounted on a skid pad (21) includes two brick making systems. Each system includes a ring (25, 65) with three open-ended mold boxes (23, 70) mounted to the ring in equiangular spacing thereabout. Drive means (30,32,30',31') and an indexing controls mechanism (51) operate to rotate the ring in steps such that the mold boxes come to rest at a fill station, a compacting station and a brick ejection station, respectively. The two systems share a compacting station and a slide plate (60) provides a bottom for the mold boxes at the fill and compacting stations and in movement therebetween for each systems. In one system, hoppers (52,56) conveyors (54,49) a blender (58) and a spray nozzle (59) deliver soil and additives to a mold box at the fill station. Similar components are included in the second system. The indexing mechanism (51) responds to a sensor signal to control the weight of depost in a mold box.

Abstract: A fluid lifting apparatus operable by air pressure applied alternately to first and second pairs of cylinders each of said cylinders having a main body part, a barrel and a bottom chamber in communications with a bottom inlet. Pressuring of the main body part of the chamber, closes a check valve at the inlet and forces fluid from the main body part, through a fluid flow valve, through the chamber and up the barrel to a production tubing segment and hence to the next higher cylinder. Emptying of the main chamber closes the fluid flow valve to prevent air from the production tubing. However, the valve is positively opened once fluid flow in the bottom chamber from the inlet is reinstituted. Air vent means to the surface and/or to the well annulus rapidly depressurizes the cylinders and hence speeds cycling between the alternate cylinder pairs.