The invention relates to a spring-damper element (2) for mounting a punching press (1), with a hydraulic damper unit (3) with a first fluid chamber (4) and a second fluid chamber (5), wherein, in the intended operation, a hydraulic fluid is displaced from the first fluid chamber (4) via a throttle point (6) into the second fluid chamber (5) when the spring-damper element (2) is compressed. The damper unit further comprises an overload valve (7) arranged between the first fluid chamber (4) and the second fluid chamber (5), which overload valve opens when a specific fluid pressure is reached in the first fluid chamber (4) or when a specific pressure difference is reached between the first fluid chamber (4) and the second fluid chamber (5) and releases a bypass (8) via which hydraulic fluid then flows from the first fluid chamber (4) into the second fluid chamber (5) bypassing the throttle point (6). Thereby, the spring-damper element (2) is designed in such a way that the fluid pressure or the pressure difference, respectively, at which the overload valve (7) opens can be adjusted when the spring-damper element (2) is installed as intended. With such spring-damper elements according to the invention, it becomes possible to create a mounting arrangement for a punching press, the damping characteristics of which can be adjusted without significant effort, such that a variable operation of the press in wide ranges becomes possible while keeping the ground loading to a minimum in each case.

The invention relates to a spring-damper element (2) for mounting a punching press (1), with a hydraulic damper unit (3) with a first fluid chamber (4) and a second fluid chamber (5), wherein, in the intended operation, a hydraulic fluid is displaced from the first fluid chamber (4) via a throttle point (6) into the second fluid chamber (5) when the spring-damper element (2) is compressed. The damper unit further comprises an overload valve (7) arranged between the first fluid chamber (4) and the second fluid chamber (5), which overload valve opens when a specific fluid pressure is reached in the first fluid chamber (4) or when a specific pressure difference is reached between the first fluid chamber (4) and the second fluid chamber (5) and releases a bypass (8) via which hydraulic fluid then flows from the first fluid chamber (4) into the second fluid chamber (5) bypassing the throttle point (6). Thereby, the spring-damper element (2) is designed in such a way that the fluid pressure or the pressure difference, respectively, at which the overload valve (7) opens can be adjusted when the spring-damper element (2) is installed as intended. With such spring-damper elements according to the invention, it becomes possible to create a mounting arrangement for a punching press, the damping characteristics of which can be adjusted without significant effort, such that a variable operation of the press in wide ranges becomes possible while keeping the ground loading to a minimum in each case.

A cutting device (1), in particular for rapidly cutting webs, comprising: a support structure (2) comprising a fixed blade (3), a carriage (4) movable along a movement direction (X), a mobile blade (5) mounted on the carriage (4), a guide (7), associated to the support structure (2), on which the carriage (4) is slidable along the movement direction (X); a sliding sleeve (11), interposed between the carriage (4) and the guide (7) concentrically to the guide (7); seal means (8, 10) interposed between the guide (7) and the carriage (4) so as to define a chamber (9), concentric to the guide (7) and containing the sleeve (11); motor means (6) configured to move the carriage (4) according to an alternating movement along the movement direction (X) between a non-operating position and an operating position, in which the mobile blade (5) partially superposes the fixed blade (3) so as to carry out the cutting of a web; supply means (15) for supplying air to the chamber (9) so as to maintain it at a greater pressure with respect to the surrounding environment.

A cutting device (1), in particular for rapidly cutting webs, comprising: a support structure (2) comprising a fixed blade (3), a carriage (4) movable along a movement direction (X), a mobile blade (5) mounted on the carriage (4), a guide (7), associated to the support structure (2), on which the carriage (4) is slidable along the movement direction (X); a sliding sleeve (11), interposed between the carriage (4) and the guide (7) concentrically to the guide (7); seal means (8, 10) interposed between the guide (7) and the carriage (4) so as to define a chamber (9), concentric to the guide (7) and containing the sleeve (11); motor means (6) configured to move the carriage (4) according to an alternating movement along the movement direction (X) between a non-operating position and an operating position, in which the mobile blade (5) partially superposes the fixed blade (3) so as to carry out the cutting of a web; supply means (15) for supplying air to the chamber (9) so as to maintain it at a greater pressure with respect to the surrounding environment.

A cutting device for machines for cutting hides and the like, including an oscillating piston provided at its end with a cutting blade, the oscillating piston being actuated pneumatically by way of an inlet and an outlet, an oscillation chamber being defined by the lower and upper stroke limits of the oscillating piston, the device including a supply duct that leads to the oscillation chamber, the supply duct being regulated by a solenoid valve in order to raise the oscillating piston and consequently raise the cutting blade.

A cutting device for machines for cutting hides and the like, including an oscillating piston provided at its end with a cutting blade, the oscillating piston being actuated pneumatically by way of an inlet and an outlet, an oscillation chamber being defined by the lower and upper stroke limits of the oscillating piston, the device including a supply duct that leads to the oscillation chamber, the supply duct being regulated by a solenoid valve in order to raise the oscillating piston and consequently raise the cutting blade.

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 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 system and device are disclosed for severing a mooring line. The device includes a line cutting assembly, one or more pressure sensors, and a control system configured to monitor the pressure sensor and actuate the line cutting assembly based upon the monitored pressure.

A system and device are disclosed for severing a mooring line. The device includes a line cutting assembly, one or more pressure sensors, and a control system configured to monitor the pressure sensor and actuate the line cutting assembly based upon the monitored pressure.