Hydraulic press tool

A hydraulic tool comprising:

• a tool body;
• a hydraulic cylinder at least partially enclosed and supported within the tool body, the cylinder defining a chamber;
• a fluid reservoir in flow communication with the cylinder;
• a fluid inlet line providing flow communication between the fluid reservoir and the chamber of the hydraulic cylinder;
• a valve governing fluid flow between the cylinder and the reservoir;
• a fluid pump in flow communication with the reservoir and the cylinder via the inlet line, the pump being selectively operable by a switch to displace fluid from the reservoir into the chamber;
• a spring biased piston movably disposed in the chamber of the hydraulic cylinder;
• a multi-position actuator including a trigger positionable to at least three states, wherein the trigger is positionable to (i) a neutral state at which the valve is closed and the switch is open, (ii) a forward state at which the valve is closed and the switch is closed, and (iii) a reverse state at which the valve is open and the switch is open.

A hydraulic tool comprising:

• a tool body;
• a hydraulic cylinder at least partially enclosed and supported within the tool body, the cylinder defining a chamber;
• a fluid reservoir in flow communication with the cylinder;
• a fluid inlet line providing flow communication between the fluid reservoir and the chamber of the hydraulic cylinder;
• a fluid pump in flow communication with the reservoir and the cylinder via the inlet line, the pump being selectively operable to displace fluid from the reservoir into the chamber;
• a biased piston movably disposed in the chamber of the hydraulic cylinder, wherein upon displacement of fluid into the chamber from the pump, the piston is moved away from a biased position;
• a pressure relief valve in flow communication with the chamber of the hydraulic cylinder and the reservoir;
• a fluid return line providing flow communication between the chamber of the hydraulic cylinder and the reservoir;
• and
• a multi-position return valve in flow communication with the chamber of the cylinder and the reservoir via the return line, the return valve having a plurality of valve positions including a biased open position and a closed position,
• wherein the return valve is biased to the normally open position, thereby allowing fluid flow between the chamber of the hydraulic cylinder and the reservoir,
• wherein upon positioning the return valve in the closed position, the return valve thereby prevents fluid flow via the fluid return line between the chamber of the hydraulic cylinder and the reservoir,
• wherein the return valve comprises a fluid control member such that upon positioning the return valve between the open position and the closed position, the fluid control member is moved across a direction of fluid flow in the fluid return line at the return valve.

A hydraulic tool comprising:

• a chamber;
• a piston movably mounted relative to the chamber;
• a reservoir in fluid communication with the chamber;
• a supply line for transporting hydraulic fluid from the reservoir to the chamber;
• a pump configured to pump hydraulic fluid through the supply line to the chamber for moving the piston relative to the chamber;
• a first return line and a second return line for transporting hydraulic fluid from the chamber to the reservoir;
• a control valve configured to regulate flow of hydraulic fluid in the first return line, wherein fluid flow in the first return line between the chamber and the reservoir is not restricted by the control valve when the control valve is open, and fluid flow in the first return line between the chamber and the reservoir is restricted when the control valve is closed;
• a pressure relief valve configured to regulate flow of hydraulic fluid in the second return line, wherein the control valve and the pressure relief valve are in parallel communication between the chamber and the reservoir;
• and
• an actuator for actuating the pump and the control valve, the actuator configured to be operable in a first state wherein the control valve is open and the pump is not pumping, a second state wherein the control valve is closed and the pump is not pumping, and a third state wherein the control valve is closed and the pump is pumping.