A blind riveting device is provided, which is adapted for engagement to a handle having a powered translating member projecting therefrom. Force from the translating member imparted to a drive piston moves a second piston to pull a blind rivet connected to a jaw engaged with the second piston, thereby mounting the blind rivet.

A blind riveting device is provided, which is adapted for engagement to a handle having a powered translating member projecting therefrom. Force from the translating member imparted to a drive piston moves a second piston to pull a blind rivet connected to a jaw engaged with the second piston, thereby mounting the blind rivet.

The invention relates to a hold-down device for a joining drive and joining drive with a hold-down device. The hold-down device includes a hold-down cylinder, wherein the hold-down cylinder provides a hold-down force by means of a pressurized chamber. The pressure chamber consists of the hold-down cylinder and a punch of the joining drive. The pressurization required for the provision of the hold-down force is provided by a hydraulic circuit of the joining drive. In the joining mode, the pressure chamber of the hold-down device is connected to a pressure accumulator of the hold-down device, so that a change in volume in the pressure chamber of the hold-down device has no noticeable influence on the pressure in the pressure chamber.

The invention relates to a hold-down device for a joining drive and joining drive with a hold-down device. The hold-down device includes a hold-down cylinder, wherein the hold-down cylinder provides a hold-down force by means of a pressurized chamber. The pressure chamber consists of the hold-down cylinder and a punch of the joining drive. The pressurization required for the provision of the hold-down force is provided by a hydraulic circuit of the joining drive. In the joining mode, the pressure chamber of the hold-down device is connected to a pressure accumulator of the hold-down device, so that a change in volume in the pressure chamber of the hold-down device has no noticeable influence on the pressure in the pressure chamber.

The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws with a drive piston hydraulically adjustable between a starting position and an end position and a pull rod operationally connected with the drive piston and adjustable between a rivet receiving position and a setting position. In order to provide a riveting tool with a hydraulically driven drive piston, which has a simple and good adaptability for the blind rivet screws and/or blind rivet nuts to be set, it is provided that a coupling unit, a tractive tool adjusted for the blind rivet nut and/or blind rivet screw as well as the pull rod are designed for the form-fitting connection of the pull rod with the tractive tool, which is releasable in the direction of the longitudinal axis and in the circumferential direction.

The invention relates to a riveting tool for setting blind rivet nuts and/or blind rivet screws with a drive piston hydraulically adjustable between a starting position and an end position and a pull rod operationally connected with the drive piston and adjustable between a rivet receiving position and a setting position. In order to provide a riveting tool with a hydraulically driven drive piston, which has a simple and good adaptability for the blind rivet screws and/or blind rivet nuts to be set, it is provided that a coupling unit, a tractive tool adjusted for the blind rivet nut and/or blind rivet screw as well as the pull rod are designed for the form-fitting connection of the pull rod with the tractive tool, which is releasable in the direction of the longitudinal axis and in the circumferential direction.

A method for operating a hydraulically operated hand-held device is provided. The hand-held device includes a hydraulic pump, a moving part, a fixed part and a return valve with an associated valve seat. The moving part can be displaced into a working position by a build-up of hydraulic pressure produced by filling a hydraulic chamber with hydraulic medium from a storage chamber using the hydraulic pump. The moving part can be automatically moved back from the working position into an end position by opening the return valve, if a predetermined working pressure is reached. The hydraulic pressure acting upon the return valve for triggering a movement of the moving part into the end position is increased independently of reaching the predefined working pressure.

A hand-held knockout driver includes a main housing having a handle portion, a motor positioned within the main housing, a pump assembly driven by the motor, and a secondary housing coupled to the main housing and defining a bore therein. The hand-held knockout driver also includes a working piston moveable within the bore from a rest position to an actuated position to define a piston throw distance therebetween. The hand-held knockout driver also includes a draw stud coupled to the working piston, a die coupled to the secondary housing, and a punch coupled to the draw stud opposite the working piston for movement therewith relative to the die. The die has a depth greater than the piston throw distance.

A hydraulic pressing tool which is particularly suitable for pressing pipe fittings, and which has a hydraulic pump connected to an electric motor is provided. With the aid of the hydraulic pump, hydraulic fluid is pumped from a tank into a piston chamber to operate the hydraulic piston. The pressure prevailing in the piston chamber is determined by a pressure sensor. When a pressure limit is reached, a solenoid valve is opened by the control device such that the hydraulic fluid flows back out of the piston chamber, through the channels, and into a reservoir.

A hydraulic pressing tool which is particularly suitable for pressing pipe fittings, and which has a hydraulic pump connected to an electric motor is provided. With the aid of the hydraulic pump, hydraulic fluid is pumped from a tank into a piston chamber to operate the hydraulic piston. The pressure prevailing in the piston chamber is determined by a pressure sensor. When a pressure limit is reached, a solenoid valve is opened by the control device such that the hydraulic fluid flows back out of the piston chamber, through the channels, and into a reservoir.