Abstract: A dynamometric tool uses a four-mandrel press. The press head is provided with a specific press geometry which is predefined by the mandrels. The dynamometric tool produces a tool which can determine the actual force of compression in an easy-to-handle manner. The dynamometric tool also has two levers which are joined together and adapted to the geometry of the press head, and which interact upon a pressure sensor during compression.

Abstract: A hand-held riveting tool is driven by a battery-powered electric motor, and comprises a hydraulically-actuated riveting head, and a reciprocating hydraulic pump driven by the electric motor. The tool includes a reservoir for hydraulic fluid, the hydraulic supply line from the pump to the riveting head being connected to the reservoir by a reservoir inlet valve which is normally open to allow hydraulic fluid to flow from the supply line into the reservoir. Operation of the tool-actuating trigger firstly closes the reservoir inlet valve, and then switches on the electric motor to operate the pump. Release of the tool-actuating trigger firstly switches off the electric motor to stop operation of the pump, and then opens the reservoir inlet valve. When the reservoir inlet valve is closed by operation of the trigger, it acts as a pressure-relief valve to relieve over-pressure of hydraulic fluid.

Abstract: The invention relates to a riveting device (1) comprising a pressure pad (3) and a riveting die (4). Said pressure pad (3) and riveting die (4) can be hydraulically driven by means of a pressure pad piston (12) and a die piston (13). The aim of the invention is to further develop such a riveting device (1) in an advantageous manner. To this end, the pressure pad piston (12) and the die piston (13) are driven by the same hydraulic pressure, the effective piston area (36) of the pressure pad piston (12) being embodied in a smaller manner than the effective piston area (14) of the die piston (13).

Abstract: A pressing tool for pressing pipe ends, and in particular, ends of pipe to be laid for sanitary purposes. The pressing jaws of the tool are connected to one another in an articulated manner, each jaw having an insert that has a circle-like-configuration in the area of interaction between the respective jaws.

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.

Abstract: The invention is concerned with a hand held hydraulic pressing apparatus (1) with a hydraulic cylinder (8), in which a hydraulically actuated piston can be displaced to carry out a pressing or cutting operation. The apparatus has a piston head (5) and a piston shank (16), the piston shank (16) being connected to a tool carrier (10). The tool carrier (10) is part of an inter-changeable apparatus head (9). In order to simplify to change the apparatus head, the invention proposes, that an interchangeable apparatus head (9) has in each case a piston shank (16) with a return spring (22).

Abstract: Tool or adaptor for receiving a tool for securing in a mounting head, including a fork-shaped mounting lug which projects in the direction of displacement and has an enlarged retaining opening starting from a smaller insertion opening.

Abstract: The invention relates to a pressing tool (1) with pressing levers (2) which are connected to one another by a connecting link plate (7, 8) such that they can be rotated in a tong-like manner and each of which each provides an upper, free mouth end (14, 16), there being provided a monitoring device (13) which only allows an open position of the pressing levers (2) which is suitable for the release of a blank (42) to be achieved if a full pressing action, with a minimum closing position of the pressing levers (2) being achieved in the process, has been carried out beforehand, a mechanical, electronic or electrical sensor (15) being disposed on one of the pressing levers (2) for the purpose of checking the relative positioning of the pressing levers (2) in relation to one another. In order to achieve an improvement, it is proposed that the sensor (15) be disposed in the upper, free mouth end (14) of the one pressing lever (2).

Abstract: A method for operating a hydraulic pressing device, for example, a pipe clamping device, that includes a stationary part and a moving part. The hydraulic pressing device also includes an automatically actuating return valve. The moving part of the hydraulic pressing device is displaced relative to the stationary part until a predetermined pressure is reached. At that point, the moving part returns automatically and completely back into its initial position, which is released as a result of the predetermined pressure being reached. The moving part is biased into its initial position by means of a return spring and, on removal of the restoring force, returns automatically back into its initial, closed condition.

Abstract: The invention relates to a method for operating a hydraulic pressuring device with a stationary part (26) and a moving part (24), whereby the moving past (24) is moved relative to the stationary part (26) until a predetermined pressure is reached. In order to operate a hydraulic pressuring device of this type, for example a cable shoe (connecting) or riveting tool pressing device, whose handling is especially improved, the invention provides that moving part (24) returns automatically and completely to the initial position thereof when a predetermined pressure is reached.

Abstract: A hydraulic apparatus for pressing or cutting workpieces, the apparatus having a mounting head for use with tools which can be moved against one another. The tools being arranged in the mounting head in a manner laterally offset from one another to allow them to move past each other. As a result of this configuration, there is provided, increased utility value, especially when using cutting tools. The tools are guided in grooves formed next to each other in the first embodiment. In this regard it is possible for a groove to be associated with each tool. In a second embodiment it is provided that the tools are guided in a common groove with additional support on opposite outer surface walls.

Abstract: The invention relates to a piston pump (1) for delivering a fluid at low pressure and at a higher pressure, a higher delivery volume being provided in one pumping cycle at low pressure than at a higher pressure, having a low-pressure delivery piston (4), which is moved inside a pump cylinder (2) and acts upon a pressure chamber (7) under prestress into its delivery end position, a high-pressure delivery piston (11), an inlet valve (9) and an outlet valve (9, 10), a fluid delivery path (5) furthermore being provided between the inlet valve (9) and the outlet valve (10), and the low-pressure delivery piston (4) being able to be moved back counter to its prestress into a delivery starting position, and proposes, to achieve effective delivery at low pressure and at a higher pressure with the simplest possible construction, that the fluid delivery path (5) passes through the low-pressure delivery piston (4), that a valve (6) is provided in the low-pressure delivery piston (4), which valve shuts in the case of move

Abstract: A manual hydraulic apparatus (1) with a traction/pressure installation, for example, a hole punch apparatus, with a hydraulic piston (5) which can be moved with respect to a cylindrical housing (25), and with a holding-up part (2) and a fastening installation (3), for example, for a piercing punch. The fastening installation (3) is rigidly connected to the cylindrical housing (25) and the holding-up part (2) can be moved by the hydraulic piston (5) with respect to the fastening installation (3).

Abstract: The invention relates to a pressing tool (1) for compressing pipe ends. In order to improve such a tool, a bearing (8) and an abutment (13) are configured on the tool (1).

Abstract: In a torque-switched clutch between an input shaft and an output shaft, the clutch transferring into a release position from a positive-locking connection when a limiting torque is reached, at least one positive-locking element is connected to one of the shafts. The positive-locking element interacts with a positive-locking receiver of the other shaft. The positive-locking element is movable against a force out of a coupling position into a release position in a non-destructive manner. The positive-locking element is of latch type design and is mounted on the one shaft so as to be pivotable relative to that shaft for movement between a latch locking position and a latch overrun position.

Abstract: A press tool (1) for pressing cable terminals and connectors or the like onto electrical conductors, having two clamping jaws (2, 3) movable against one another, there being rotatably mounted in each clamping jaw (2, 3), respectively one disc-type press die (27, 29) formed with several different press troughs (33, 34) on the circumference, which press die is lockable in each working position. A second press die (28, 30) is associated with each press die (27, 29), the second press die being arranged to be rotatable independently of the first press die (27, 29).