TRAVEL PISTON ACTUATOR EQUILIBRIUM PRESSURE DIAMOND EQUILIBRIUM PRESSURE DIAMOND’S ADVANTAGE 1.250” 69.12” WG (2.4944 PSI) 56.0” WG 18.98% 1.750” “ 58.0” WG 16.08% 2.000” “ 59.0” WG 14.64% 2.413” “ 61.0” WG 11.75% 2.500” “ 61.7” WG 10.73% 2.675” “ 63.0” WG 8.85% 2.875” “ 65.9” WG 4.66% NOTE: The piston actuator requires the same pressure of 69.12” WG (2.494 PSI) at all points in its travel, maintaining the equilibrium force of 59.75 pounds to match the 59.75 pound load. The diamond actuator requires varying pressures during its illustrated travel maintaining an equilibrium force of 59.75 pounds matching the 59.75 pound load. 55 56 57 58 59 60 61 62 63 64 65 66 67 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 (2.875" LIFT, 65.9"WG) (2.675" LIFT, 63"WG) (2.413" LIFT, 61"WG) (2" LIFT, 59"WG) (1.25" LIFT, 56"WG) 9.125" 9.125" 2.625" 2.625" FLOATING HINGE ANCHORED HINGE FLOATING HINGE FLOATING HINGE ANCHORED HINGE INCHES OF LIFT AT EQUILIBRIUM WITH A CONSTANT 59.75# LOAD DV = 68.005 IN³ PV = 68.865 IN³ DV = 63.383 IN³ PV = 64.074 IN³ DV = 59.318 IN³ PV = 59.882 IN³ DV = 57.291 IN³ PV = 57.990 IN³ DV = 47.618 IN³ PV = 47.906 IN³ DV = 41.725 IN³ PV = 41.918 IN³ DV = 29.871 IN³ PV = 29.941 IN³ (2.500” LIFT, 61.7”WG) “WG PRESSURE APPLIED TO DIAMOND ACTUATOR AND PISTON ACTUATOR 69.12 69.12” WG EQUILIBRIUM PRESSURE REQUIRED AT ALL POINTS OF PISTON ACTUATOR’S STROKE EQUILIBRIUM COMPARISON REGARDING THE DIAMOND-SHAPED ACTUATOR AND THE CONVENTIONAL PISTON ACTUATOR CONVENTIONAL PISTON ACTUATOR DIAMOND-SHAPED ACTUATOR CONSTANT 59.75 LB FORCE DV = DIAMOND ACTUATOR’S VOLUME PV = PISTON ACTUATOR’S VOLUME CONSTANT PRESSURE OF 69.12”WG (2.494 PSI) VARYING PRESSURE FLUID FLUID The table below presents the efficiency comparison regarding equilibrium with an equal load of 59.75 pounds on both the piston actuator and the diamond-shaped actuator. DIAMOND-SHAPED ACTUATOR’S PERFORMANCE CURVE 13.270
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