Patent ID: 8677799
Filing Date: 2014-03-25
Classification: B30B,F15B

Abstract:
1. Apparatus for actuating processing machines by means of fluid pressurizing media, comprising: a pumping system comprising at least one motor-driven pump that is variable with regards to flow rate, and a first liquid pressurizing medium reservoir; at least two alternately driven hydrostatic actuators, each of the at least two hydrostatic actuators comprising a first cylinder having a first cylinder room, a second cylinder having a second cylinder room, a first piston received by the first cylinder room, and a second piston connected to the first piston, the second piston being received by the second cylinder room; a control manifold comprising at least one distribution valve, the at least one distribution valve configured as a multiple way valve; a first pipe system connecting the pumping system to the control manifold and connecting the control manifold to the first cylinder room of each of the at least two hydrostatic actuators; a boost supply comprising a hydraulic fluid source; a second pipe system connecting the boost supply to the second cylinder room of each of the at least two hydrostatic actuators, the second pipe system configured that a different pressurizing medium from that contained in the first liquid pressurizing medium reservoir can be fed through to the at least two hydrostatic actuators and that the different pressurizing medium is pressurized by the hydrostatic actuators up to the pressure that is needed for actuating the allocated processing machine; a first outlet check valve; a second outlet check valve; a collective pressurizing medium pipe system; a first pipe connecting the collective pressurizing medium pipe system to the second cylinder room of the first of the at least two hydrostatic actuators by the first outlet check valve; a second pipe connecting the collective pressurizing medium pipe system to the second cylinder room of the second of the at least two hydrostatic actuators by the second outlet check valve; a first precompression valve, the first precompression valve configured to bypass the first outlet check valve when operated in order to precompress the second cylinder room of the first of the at least two hydrostatic actuators with a fluid coming from the second pipe through the first precompression valve into the second cylinder of the first of the at least two hydrostatic actuators, when the second piston of the second of the at least two hydrostatic actuators is ready to press a fluid within the second cylinder room of the second of the at least two hydrostatic actuators under high pressure via the second outlet check valve into the second pipe a second precompression valve, the second precompression valve configured to bypass the second outlet check valve when operated in order to precompress the second cylinder room of the second of the at least two hydrostatic actuators with a coming from the first pipe through the second precompression valve into the second cylinder of the second of the at least two hydrostatic actuators, when the second piston of the first of the at least two hydrostatic actuators is ready to press a fluid under high pressure via the first outlet check valve into the first pipe; whereby the apparatus for actuating processing machines can also operate as a variable pump, pressure or volume control, wherein when flow is not required the first piston and second piston of each of the least two hydrostatic actuators are stationary, and wherein the at least one motor driven pump is configured to actuate the at least two alternately driven hydrostatic actuators through the at least one distribution valve of the control manifold by means of the liquid pressurizing medium from the first liquid pressurizing medium reservoir.