Abstract: A method for the pressing of a press fitting, with a tube inserted into the press fitting, by means of a pressing tool, wherein the press fitting has an encircling bead in which an O-sealing ring is placed, wherein the tube ends within the press fitting and a first pressing is carried out within the bead, wherein, furthermore, a further pressing is carried out on the tube-insert side of the press fitting at a distance from the bead, the further pressing leading to the press fitting and the tube obtaining a conicity which prevents them from being pulled off and runs in the same direction.

Abstract: The invention relates to a pair of pressing jaws for hydraulic or electric pressing tools for pressing fittings onto pipes or for the press connection of electric cables, two pressing jaws connected to one another in an articulated manner forming a pair of pressing jaws, the pressing jaws being biased into their open position by a tension spring which spans a free space between the two pressing jaws, and in each case one end of the tension spring being accommodated in an accommodating opening which opens out into a narrow peripheral side of the pressing jaw, this narrow peripheral side being directed toward the free space, and, in order to secure the tension spring, a tension-spring end engaging around a pin-like securing part, which securing part is disposed at that end of the accommodating opening which is directed away from the free space.

Abstract: The invention relates to a hydraulically driven pressing device (1) comprising a piston (5) and a cylinder (4) for acting on pressing jaws (8, 8?, 8?), wherein the piston shaft (11) at any rate is connected to acting means (12). To further improve a pressing device of the type in question such that the same device can be used to carry out pressing operations requiring different levels of pressing power, it is proposed that an adjustable stop (33) be provided in the direction of displacement of the hydraulic piston (5) in order to achieve different end positions for the hydraulic piston (5) during the piston return stroke. A method of pressing a fitting with a tube is also described.

Abstract: A hydraulic pressing unit includes a hydraulic pump, supply and hydraulic chambers, moving and stationary parts, a restoring spring, and a return valve provided within or attached to a housing. The moving part is displaced from a starting position into a pressing position as a result of filling the hydraulic chamber with a hydraulic medium from the supply chamber by using the hydraulic pump. The return valve is automatically displaced into an open position as a result of a hydraulic pressure corresponding to the pressing position, and the restoring spring moves the moving part. A piston acts on the flow of the hydraulic medium and lowers the pressure such that the return valve is displaced into the closed position.

Abstract: A hydraulic pressing unit includes a hydraulic pump, supply and hydraulic chambers, moving and stationary parts, a restoring spring, and a return valve provided within or attached to a housing. The moving part is displaced from a starting position into a pressing position as a result of filling the hydraulic chamber with a hydraulic medium from the supply chamber by using the hydraulic pump. The return valve is automatically displaced into an open position as a result of a hydraulic pressure corresponding to the pressing position, and the restoring spring moves the moving part. A piston acts on the flow of the hydraulic medium and lowers the pressure such that the return valve is displaced into the closed position.

Abstract: A cable or a cable receptacle and a method of forming same are disclosed. The cable lug or cable receptacle has a flat part and a tube portion integrally formed together as one piece. The flat part has opposing surfaces which abut against each other. The flat part and the tube portion are plated with tin such that an integral bond is established between the abutting surfaces of the flat part.

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. 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: 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: Disclosed is a pressing device for compressingly joining pipe-shaped workpieces, particularly a pipe end and a fitting 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, and both angle levers are train-connected to the same (second) press member.

Abstract: The invention relates to a pair of pressing jaws for hydraulic or electric pressing tools for pressing fittings onto pipes or for the press connection of electric cables, the two pressing jaws being disposed for rotation about a common axis and each pressing jaw forming a bearing eye for this purpose. In order to configure a pair of pressing jaws of the type in question in a more functionally advantageous manner, it is proposed that each pressing jaw forms two bearing eyes with coaxial bearing openings, and the bearing eyes are disposed in an interengaging manner in the assembled state.

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: An electrohydraulic pressing device is suitable for one-handed operation. The device includes a housing having a working head attached thereto, an electric motor provided within the housing for actuating the working head, the electric motor being rearward of the working head, an actuating switch for actuating the working head, a rearward switch provided within the housing rearward of the motor; and a lever extending from the actuating switch to the rearward switch. The lever is within the housing and the housing around the lever forms a gripping region. When the actuating switch is actuated, the lever is moved to actuate the rearward switch.

Abstract: An insulating covering is provided for a pressing jaw of a pair of pressing jaws for hydraulic or electric pressing tools for pressing fittings onto pipes or for the press connection of electric cables. The insulating covering includes a pair of legs having a substantially c-shaped cross-sectional configuration, and an articulation portion provided between the legs.

Abstract: The invention relates to a cable lug (1) comprising a receiving tube section (4) for the cable (19), a flat piece-connecting section (5) that is molded on and is provided with a bore (6), and a nut (2) which is captively mounted on the flat piece-connecting section (5) and is preferably rotatably mounted. Said nut (2) does not penetrate the flat piece-connecting section (5) while being mounted by means of a shaped mounting material section (16) of the flat piece-connecting section (5), which extends into an undercut (9) that is embodied on the nut. In order to be able to rotatably mount the nut or the functional part, the mounting material section (16) is accommodated in the undercut (9) with an axial clearance. Furthermore, the mounting material section (16) is rooted in an area of the flat piece-connecting section which is lowered in a step-type manner.

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: The invention relates to a pair of pressing jaws for hydraulic or electric pressing tools for pressing fittings onto pipes or for the press connection of electric cables, the two pressing jaws being disposed for rotation about a common axis and each pressing jaw forming a bearing eye for this purpose. In order to configure a pair of pressing jaws of the type in question in a more functionally advantageous manner, it is proposed that each pressing jaw forms two bearing eyes with coaxial bearing openings, and the bearing eyes are disposed in an interengaging manner in the assembled state.

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: The invention relates to an expansion tool for expanding tube ends. The expansion tool has an expansion mandrel and a counter-support, said expansion mandrel consisting of a tow-bar and an elastic rubber expansion element surrounding it. The counter-support 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 is anchored in a bolt fastening element and the counter-support can be impinged upon via a pressure bar element that projects beyond the bolt fastening element in the longitudinal direction of the tow-bar.

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.