SIMPLEX, TRIPLEX, QUINTUPLEX, AND CENTRIFUGAL POWER PUMPS; RECIPROCATING POWER PUMPS, HORIZONTAL DOUBLE-ACTING AND PLUNGER PUMPS, VERTICAL QUINTUPLEX POWER PUMPS FOR MODERATE OR HIGH PRESSURE HYDRAULIC ACCUMULATORS, HYDRAULIC TRIMMING AND FORGING PRESSES, PIPEBENDING PRESSES, LINOLEUM PRESSES, ALLEVIATORS OR SHOCK ABSORBERS FOR ABSORBING THE SHOCK IN HYDRAULIC SYSTEMS CAUSED BY THE SUDDEN STOPPING OF A COLUMN OF WATER UNDER PRESSURE, COMBINED SAFETY DEVICES AND ALLEVIATORS; SYNCHRONIZED SUCTION-VALVE CONTROLS CONSISTING OF DEVICES ATTACHED TO PUMPS BY WHICH SUCTION VALVES ARE PERMITTED TO CLOSE ONLY AT THE END OF SUCTION STROKE, THIS ARRANGEMENT ALWAYS MAINTAINING A CONSTANT RESERVOIR OF WATER UNDER THE REQUIRED PRESSURE; FIXED-CYLINDER-TYPE CASTIRON BALLAST WEIGHTS WITH INTERLOCKING RINGS, HYDRAULIC INTENSIFIERS AND REDUCERS, HYDRAULIC FORCING AND FORMING PRESSES, HYDRAULIC VISES, HYDRAULIC STRAIGHTENING PRESSES, HYDRAULIC TIRE-FORCING PRESSES, HYDRAULIC SPUD PRESSES (FOR PRESSING PIPE SPUDS ON SHEET METAL TENDERS), HYDRAULIC WHEEL PRESSES, HYDRAULIC SHEET-METAL-WORK PRESSES, HYDRAULIC FLANGING PRESSES, HYDRAULIC SECTIONAL FLANGING PRESSES, HYDRAULIC VENEERING AND SHEET-METAL-WORK PRESSES, HYDRAULIC SHOCK ABSORBERS, GEAR GUARDS FOR PUMPS