Abstract: Disclosed is a pressing device (1) for compressingly joining pipe-shaped workpieces, particularly a pipe end (2) and a fitting (3) mounted thereon. At least one of the workpieces is plastically deformed by several press members which are movable along a central longitudinal axis of the workpieces for performing the compression. In order to produce a pressing device with several compression jaws that are comparatively easy to mount and allow the press members to be engaged as centrally as possible during compression, at least two press members are pivotally connected to each other by means of two articulated levers embodied as angle levers for applying compression force. The angle levers pressingly lean on a (first) press member (5), and both angle levers are train-connected to the same (second) press member (6).

Abstract: The invention relates to an electrohydraulic pressing device (1) that can be operated using one hand. The device comprises a working head (30), an electric motor (4), a pump (20), a hydraulic reservoir (33), and a gear mechanism (19) extending between the electric motor (4) and the pump (20). A holding area (5) around which a hand is placed is provided and an actuating switch (39) is assigned to this area. The aim of the invention is to improve a pressing device of this type with regard to the handling thereof. To this end, the invention provides that the holding area (5) is formed around the electric motor (4), and the actuating switch (39) is situated between the electric motor (4) and the working head.

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 locking bolt for mounting a tool in a hydraulic press, it being possible for the locking bolt to move in a bolt receptacle between a locking position and a release position, with a securing element, which is located in the bolt receptacle and secures the locking position by positive engagement in the locking bolt, the locking bolt also having a securing portion, and the locking bolt being secured against movement into the release position when the securing element is located in the securing portion, characterized in that the locking bolt has a longitudinal groove, in that the securing portion is formed with a securing depth in any event corresponding to a groove depth of the longitudinal groove and in that the securing portion is formed such that it is adjacent to the longitudinal groove in the circumferential direction, with a direct transition from a groove base into the securing position.

Abstract: A gear mechanism or motor includes a shaft, and output rotary bodies which are in engagement therewith. The bodies interact with the shaft in the radial direction, by bearing against the shaft, and interact in the axial direction of the shaft with an upper guideway body which can move in the axial direction and is loaded toward the bodies. An interaction region of the shaft has a circular cross section. A guideway of the guideway body is structured in terms of its height over its periphery.

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 relates to an expansion tool (1) for expanding tube ends (7). Said expansion tool has an expansion mandrel (8) and a counter-support (9), said expansion mandrel (8) consisting of a tow-bar (10) and an elastic rubber expansion element (11) surrounding it. The counter-support (9) supports the expansion element on the base extremity and radially surrounds it at a distance. In order to improve an expansion tool of the above-described kind, the tow-bar (10) is anchored in a bolt fastening element (20) and the counter-support (9) can be impinged upon via a pressure bar element (25) that projects beyond the bolt fastening element (20) in the longitudinal direction of the tow-bar (10).

Abstract: The invention relates to a pressing tool (8) provided with three or four press mandrels (12, 15) which move towards each other during the pressing process. The press mandrels (12-15) have a roof-shaped transversal profile. The lateral distance (36) between the press mandrels (12-15) is increasingly reduced during the pressing process. An extending element (37) is arranged between two press mandrels, extending from one press mandrel to another press mandrel and being inserted into the other press mandrel during the pressing process. The aim of the invention is to improve said pressing device and to improve pressing. In order to block the above-mentioned distance (36), the extending element (37) is disposed in such a way that both roof edges (38) of the corresponding press mandrels cut across said extending element (37) in an initial 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: The invention relates to a dynamometric tool (1) used as a four-mandrel press (2). Said press head (2) is provided with a specific press geometry which is predefined by the mandrels (11). The aim of the invention is to produce a tool which can determine the actual force of compression in an easy-to-handle manner. The inventive tool also comprises two levers (4, 5) which are joined together and adapted to the geometry of the press head (2), and which interact upon a pressure sensor (6) during compression.

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: 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 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: 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: 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: 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.