B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
100/47, 138/65
B30B 1/00 (2006.01) B30B 15/16 (2006.01)
Patent
CA 1280669
INVENTION: ENERGY RECOVERY SYSTEM FOR PRESS INVENTORS: LEON MALASHENKO and RONALD BALLANTYNE ABSTRACT OF THE DISCLOSURE A press having a hydraulic mechanism for repeatedly raising and lowering a press platen and incorporating an energy recovery system is described. A hydraulic cylinder which serves to raise the platen has a vertical chamber, a piston which divides the chamber into upper and lower compartments, and a piston rod which extends upwardly from the upper surface of the piston, centrally through the upper compartment, to the platen. The pressure-effective area of the upper surface of the piston is about one-half that of the lower surface of the piston owing to the comparatively large cross-sectional area of the piston rod. When the platen is to be lowered under gravity, a valve is actuated to place the upper and lower cylindercompartments in communication causing an intensification of fluid pressure in the lower compartment. A second valve is simultaneously actuated to permit hydraulicfluid to be transferred from the lower cylinder compartment to an accumulator pre-charged to receive and store hydraulic fluid only under pressure in excess of that required to actuate the hydraulic cylinder for lifting of the platen. Potential energy associated with the raised platen is thus transformed into energy stored as hydraulic fluid under pressure. When the platen is to be raised, a pump is actuated to apply hydraulic fluid under pressure to the lower cylinder compartment and the accumulator is simultaneously discharged into the lower cylinder compartment to assist in the raising.
510841
Ballantyne Ronald
Malashenko Leon
Ballantyne Ronald
Hepburn (john T.) Limited
Malashenko Leon
Waraksa Mirek A.
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