A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a clevis supporting a head of the power tool, a nut coupled to an outer peripheral surface of the clevis, and a collar coupled to the housing and surrounding the nut to axially constrain the nut between the collar and the housing while permitting relative rotation between the collar and the nut.

Embodiments of the disclosure provide a tool head for a hydraulic tool. The tool head includes a variety of lightweight, high-strength materials, such as titanium, titanium alloys, and carbon fibers. The tool head can be configured as a cutting, crimping, or pressing tool head.

A hydraulic power tool includes a housing defining a cylinder, a piston at least partially positioned within the cylinder and movable between a retracted position and an extended position, a reservoir containing hydraulic fluid, a pump for transferring hydraulic fluid in the reservoir to the cylinder, causing the piston to move from the retracted position toward the extended position, a return valve defining a rotational axis and positioned between the cylinder and the reservoir, and a valve actuator driven by the pump for opening the return valve, thereby fluidly communicating the cylinder and the reservoir, in response to a predetermined pressure being reached in the cylinder.

The invention is based on the technical problem of improving the pressing in of large press fittings, said problem being solved by a device for transmitting a mechanical force for driving a pressing device for press fittings, having a storage container (4) for hydraulic fluid, having a pump cylinder (8), having a working cylinder (12), having a first line (14) for connecting the storage container (4) to the pump cylinder (8), having a second line (16) for connecting the pump cylinder (8) to the working cylinder (12), and having a third line (18) for connecting the working cylinder (12) to the storage container (4), wherein means (20) for preventing a return flow into the storage container (4) are provided in the first line (14), wherein means (22) for preventing a return flow into the pump cylinder (8) are provided in the second line (16), wherein switching means (24) for opening and closing the third line (18) are provided, and wherein the swept volume (VA) of the working cylinder (12) is configured to be greater than the swept volume (VP) of the pump cylinder (8). The invention also relates to a corresponding method.

A hand-held knockout driver includes a main housing having a handle portion, a motor positioned within the main housing, a hydraulic assembly driven by the motor and including a reservoir containing hydraulic fluid, a secondary housing coupled to the main housing and defining a bore therein, a working piston moveable within the bore between a rest position and an actuated position, and a work zone defined between the secondary housing and the working piston into which pressurized hydraulic fluid discharged from the hydraulic assembly is received. One unit of fluid is added to the work zone to move the working piston from the rest position to the actuated position. The reservoir has a fill capacity no greater than about 1.5 units of fluid.

A working head for a hydraulic power tool including a head frame and a first moveable die head configured to move along the working head frame. The first moveable die head configured to receive a first moveable die comprising a first body length. A second die head is adapted to receive a second die comprising a second body length. The first body length of the moveable die is different from the second body length of the stationary die.

A working head for a hydraulic power tool including a head frame and a first moveable die head configured to move along the working head frame. The first moveable die head configured to receive a first moveable die comprising a first body length. A second die head is adapted to receive a second die comprising a second body length. The first body length of the moveable die is different from the second body length of the stationary die.

A barrier device to prevent crawling arthropods such as bedbugs from accessing an item of furniture, said barrier device comprising a furniture riser, a deep fluid-filled moat, and a smooth wall around the moat.

Hydraulic systems and tools having an actuator that actuates a pump and a control valve are described. The pump transports fluid into a chamber to advance a piston in the chamber. The control valve is biased open and regulates flow of hydraulic fluid from the chamber to a reservoir. The actuator is operable in a first state in which the control valve is open, allowing flow of fluid from the chamber to the reservoir, and the pump is not pumping. The actuator can be operated in a second state in which the control valve is closed, restricting flow of fluid from the chamber to the reservoir, and the pump is not pumping. The actuator can be operated in a third state in which the control valve is closed and the pump is pumping fluid from the reservoir into the chamber in order to advance the piston.

A working head for a hydraulic power tool including a head frame and a first moveable die head configured to move along the working head frame. The first moveable die head configured to receive a first moveable die comprising a first body length. A second die head is adapted to receive a second die comprising a second body length. The first body length of the moveable die is different from the second body length of the stationary die.