POWER TOOL
First Claim
1. A power tool for tightening a fastener comprising:
- a motor;
a hammer intermittently or continuously rotatable in a forward direction by the motor;
an anvil that is impacted by the hammer rotated in the forward direction; and
a control unit that controls the hammer to continuously rotate at a first number of rotations, and to intermittently rotate at a second number of rotations lower than the first number of rotations when a prescribed time has elapsed from the rotation of the hammer at the first number of rotations, and then to intermittently rotate at a third number of rotations lower than the second number of rotations when a predetermined time has elapsed from the rotation of the hammer at the second number of rotations.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a power tool for tightening a fastener. The power tool includes a motor, a hammer, an anvil, and a control unit. The hammer is intermittently or continuously rotatable in a forward direction by the motor. The anvil is impacted by the hammer rotated in the forward direction. The control unit controls the hammer to continuously rotate at a first number of rotations, and to intermittently rotate at a second number of rotations lower than the first number of rotations when a prescribed time has elapsed from the rotation of the hammer at the first number of rotations, and then to intermittently rotate at a third number of rotations lower than the second number of rotations when a predetermined time has elapsed from the rotation of the hammer at the second number of rotations.
-
Citations
11 Claims
-
1. A power tool for tightening a fastener comprising:
-
a motor; a hammer intermittently or continuously rotatable in a forward direction by the motor; an anvil that is impacted by the hammer rotated in the forward direction; and a control unit that controls the hammer to continuously rotate at a first number of rotations, and to intermittently rotate at a second number of rotations lower than the first number of rotations when a prescribed time has elapsed from the rotation of the hammer at the first number of rotations, and then to intermittently rotate at a third number of rotations lower than the second number of rotations when a predetermined time has elapsed from the rotation of the hammer at the second number of rotations. - View Dependent Claims (2, 3, 4)
-
-
5. A power tool for tightening a fastener comprising:
-
a motor; a hammer intermittently or continuously rotatable in a forward direction by the motor; an anvil that is impacted by the hammer rotated in the forward direction; and a control unit that controls the hammer to continuously rotate at a first rotational velocity, and to intermittently rotate at a second rotational velocity lower than the first rotational velocity when a prescribed time has elapsed from the rotation of the hammer at the first rotational velocity, and then to intermittently rotate at a third rotational velocity lower than the second rotational velocity when a predetermined time has elapsed from the rotation of the hammer at the second rotational velocity. - View Dependent Claims (6, 7, 8)
-
-
9. A power tool for tightening a fastener comprising:
-
a motor; a hammer intermittently or continuously rotatable in a forward direction by the motor; an anvil that is impacted by the hammer rotated in the forward direction; and a power supply unit that continuously supplies an electric power to the motor, and then intermittently supplies the electric power to the motor in a first cycle when a prescribed time has elapsed from continuously supply of the electric power, and then intermittently supplies the electric power to the motor in a second cycle shorter than the first cycle when a predetermined time has elapsed from intermittently supply of the electric power in the first cycle.
-
-
10. A method for tightening a fastener using a power tool, the power tool including a motor, a hammer intermittently or continuously rotatable in a forward direction by the motor, and an anvil that is impacted by the hammer rotated in the forward direction, the method comprising:
-
first controlling the hammer to continuously rotate at a first number of rotations; second controlling the hammer to intermittently rotate at a second number of rotations lower than the first number of rotations when a prescribed time has elapsed from the first controlling; and third controlling the hammer to intermittently rotate at a third number of rotations lower than the second number of rotations when a predetermined time has elapsed from second controlling.
-
-
11. A method for tightening a fastener using a power tool, the power tool including a motor, a hammer intermittently or continuously rotatable in a forward direction by the motor, and an anvil that is impacted by the hammer rotated in the forward direction, the method comprising:
-
first controlling the hammer to continuously rotate at a first rotational velocity; second controlling the hammer to intermittently rotate at a second rotational velocity lower than the first rotational velocity when a prescribed time has elapsed from the first controlling; and third controlling the hammer to intermittently rotate at a third rotational velocity lower than the second rotational velocity when a predetermined time has elapsed from the second controlling.
-
Specification