Patent ID: 11878402
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A hydraulic tool comprising:
a fluid reservoir;
a pump fluidly coupled to the fluid reservoir;
an electric motor mechanically coupled to the pump;
a cylinder;
a pressure rail fluidly coupled to the pump;
a sequence valve fluidly coupled to the pressure rail and the cylinder;
a shuttle valve in fluid communication with the sequence valve, the pressure rail, and the fluid reservoir;
an inner cylinder affixed to the cylinder;
a piston defining a piston rod and a piston head, each of the piston rod and the piston head positioned to slide on an external surface of the inner cylinder, the piston slidably accommodated within the cylinder;
a first trigger button;
a second trigger button; and
a controller configured to perform operations comprising:
receiving a first signal when the first trigger button is triggered,
in response to the first signal, causing the electric motor to rotate in a first rotational direction, causing the pump to provide fluid to the cylinder through the sequence valve, causing the shuttle valve to be moved to a first position to prevent flow from the sequence valve to the fluid reservoir, and causing the piston to move in a first linear direction,
receiving a second signal when the second trigger button is triggered, and in response to the second signal, causing the electric motor to rotate in a second rotational direction opposite the first rotational direction, opening a fluid path from the cylinder to the fluid reservoir to depressurize the pressure rail, and causing the piston to move in a second linear direction opposite the first linear direction,
the shuttle valve in a second position when the pressure rail is depressurized to allow flow from the sequence valve to the fluid reservoir.