Abstract:
A compact force multiplying actuator 10 and its associated valve 20 are disclosed. The actuator 10 and valve 20 include piston heads 31 and 32 and force multiplying load beams 52 and 53. Belleville springs 81 and 82 are disposed axially between the piston heads 31, 32 and the load beams 52, 53. The Belleville springs 81 and 82 act through an output member 71 to retain a valve member 88 in a closed position. When pneumatic pressure is applied against the piston heads 31 and 32, movement of the piston heads 31 and 32 is transferred through a force transfer member 45 and through the force multiplying load beams 52 and 53 to move the output member 71 against the bias of the Belleville springs 81 and 82 to allow the valve member 88 to open.
Abstract:
The invention relates to a hydraulic actuator with movement decoupling, that can be applied to actuations where a linear movement must be performed while ensuring the freedom of a rotary movement. A hydraulic cylinder (03) held on the fixed part of the machine comprises a piston (01) that can perform the required linear movement, said piston comprising a mechanical interface (11) that can transmit the linear movement towards the rotating part (08) by means of an axle or a concentric master tube (07) axially sliding in the rotating part and rotating therewith. The interface performs a decoupling between the linear movement and the rotating movement, leaving the rotating movement entirely free. The invention also relates to the combination of the main hydraulic actuator with a hydropneumatic converter, the converter comprising a pneumatic cylinder (24) containing an annular pneumatic piston (20). The pneumatic piston can drive at least one pressure amplifying hydaulic cylinder (19, 25) along with its linear movement.
Abstract:
A compressible fluid powered device includes a dose chamber. An inlet supplies pressurised fluid to the dose chamber. An outlet for releases pressurised fluid from the dose chamber. A moveable divider divides the dose chamber into a primary space and a secondary space, movement of the divider expanding one space at the expense of the other. At least one flow pathway from one space to the other, which collectively allow gas to flow in both directions past the divider and pressure to equalise across the divider, the flow pathway being much more limited than the outlet.
Abstract:
A device includes an actuation system with a dose chamber including an inlet for high pressure fluid. A working chamber extends away from the dose chamber. An annular wall separates a portion of the working chamber from the dose chamber such that the dose chamber encompasses the portion of the working chamber. In use an item to be driven along the working chamber is at least partially within the surrounded portion of the working chamber with the item at one end of its travel in the working chamber. A valve mechanism selectively allows high pressure fluid from the dose chamber to flow into the piston chamber.
Abstract:
The actuator unit (1) comprises a hollow body (2) defining a sliding chamber inside (3, 103, 203); a piston (4) mounted sliding inside said sliding chamber (3, 103, 203) in such a way as to provide an actuation force (F) and operated by a fluid fed from outside; a body (6) having one transmission end (6B) for the transmission of said actuation force prolonged outside said sliding chamber (3, 103, 203) and one hooking end (6A) hooked to said piston (4), amplification means (18, 21, 23) being interposed between said body (6) and said piston (4) to amplify said actuation force (f) so as to obtain an amplified actuation force (F1).
Abstract:
A mold assembly (30) for producing masonry blocks and adapted for use in a masonry block machine. The mold assembly includes plurality of liner plates (32 a-d), each liner plate having a major surface (44 a-d), the liner plates positioned within a mold box and configured such that the major surfaces form a mold cavity (46) having a desired form, wherein at least one of the liner plates is moveable between a retracted position and a desired extended position toward an interior of the mold cavity. A gear drive assembly (31) selectively coupled to the at least one moveable liner plate and configured to move the at least one moveable liner plate betwee the retracted and extended position, wherein the gear drive assembly is positioned substantially external to the mold box when the at least one moveable liner plate is in the retracted position.