Abstract: A device for forming portions of food is proposed, comprising a hydraulic press. rne press has at least one hydraulic pressure generator and at least two actuators, wherein each of the actuators comprises a working cylinder and the working cylinders are hydraulically connected. It is preferably provided that a die has at least two separate receptacles for receiving portions of food. The receptacles interact with respective pressing tools, and the pressing tools can in each case be moved by means of an actuator, in particular by means of a pressing ram.

Abstract: A hand-held pressing apparatus comprises a pressing assembly and a controlling valve. The pressing assembly comprises a piston cylinder, a piston, a piston rod mounted on the piston, and a tool. The piston cylinder defines a piston chamber. The piston is slidably received in the piston chamber. The piston rod is partially protrudes from the piston chamber. The tool is mounted to the protruding end of the piston rod. The controlling valve connects to a pressure source, and is for controlling the gas pressure in the piston chamber. When the pressing head aims at the workpiece, the controlling valve controls the piston chamber to pressurize the pressure cylinder assembly using pressurized gas from the pressure source, to drive the piston, the push rod and the tool to act on the workpiece.

Abstract: A fluid distributor apparatus includes a body having distribution ports; a spool adapted for controlling the distribution ports and mounted slidingly in a first sliding seat obtained in the body and communicating with the distribution ports; a copying-member mounted slidingly and sealed in a second seat obtained in the spool; and a supply system for a controlled supply of the fluid to the second seat, so that the copying-member slides in a controlled way. The supply system includes also a chamber containing the fluid and communicating with said the seat, and a pushing device of the fluid mounted slidingly and sealed in the chamber.

Abstract: Bending presses containing pistons providing up and down motion of the upper clamp, at least one engine for motion of the said pistons, and filling valves providing pre-filling during quick down and up motion of the pistons. The bending presses contain at least one pump of variable rotation and fixed displacement transmitting the motion received from the said engine to the pistons.

Abstract: A hydraulic compactor system includes a portable container adapted to be transported by a truck and having a chamber for receiving a waste material to be compacted. The container has a self-contained compacting ram actuated by a hydraulic cylinder, and a remote hydraulic power supply unit is connected to the hydraulic cylinder by flexible hydraulic hoses. Each of the hoses is provided with a breakaway hydraulic coupling having two sections connected by tension releasable coupling means with the sections having spring biased valves which are open when the sections are coupled together and automatically close when the sections separate due to a predetermined tension force on the hoses. Each breakaway coupling compensates for increases in hydraulic fluid pressure to prevent separation of the coupling sections when the fluid pressure increases to actuate the hydraulic compacting cylinder.

Abstract: The invention relates to a hydraulic drive, especially for a press, punching or nibbling machine, comprising a double-acting work cylinder whose piston comprises a first working surface effective in the retracting direction and a second working surface effective in the extending direction, which each delimit one pressure chamber; with at least two different pressures being applicable to at least one of the working surfaces by means of an actuator for retracting or extending the piston into and out of the work cylinder; with the hydraulic drive comprising an actuator unit which optionally enables a throttled return flow of hydraulic medium from the first pressure chamber delimited by the first working surface.

Abstract: The invention relates to a method of operating a hydraulic pressing unit, in particular manual pressing unit, and a pressing unit of this type, it being the case that the pressing unit has a hydraulic pump, a moving part, a stationary part and a non-return valve, that, furthermore, the moving part is displaced into a pressing position by the build-up of a hydraulic pressure and the non-return valve moves automatically into an open position only in the presence of a predetermined hydraulic pressure corresponding to a pressing pressure, and that, furthermore, the moving part is configured for moving back automatically from the pressing position into an end position under the action of a restoring spring and the non-return valve is configured only to close once the moving part has reached the end position.