Electric driving tool with driver propelled by flywheel inertia
First Claim
1. A tool comprising:
- a motor assembly with a flywheel that is driven by an electric motor;
a driver that is selectively engage-able with an edge of the flywheel to transmit energy therebetween to cause the driver to translate along a driver axis; and
wherein the electric motor is selected such that a function relating a ratio of energy loss of the motor to a time to attain a predetermined angular speed is substantially minimized;
wherein the motor assembly includes a roller that is movable between an unactuated position and an actuated position, wherein positioning of the roller in the actuated position drives the driver into the edge of the flywheel;
wherein the roller is mounted on an activation arm assembly that includes a first arm, a second arm and a third arm, the first arm being pivotally coupled to a structure to which the motor is mounted, the second arm being pivotally coupled to the first arm, the third arm being pivotally coupled to the second arm.
1 Assignment
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Accused Products
Abstract
A tool with a driver, which is translatable along a driver axis, and a motor assembly having an electric motor, a flywheel, a roller and an actuator. The electric motor is selectively operable for driving the flywheel. The actuator is selectively operable for translating the roller such that the roller drives the driver against the flywheel to permit energy to be transmitted from the flywheel to the driver. The electric motor is selected to substantially minimize energy losses associated with bringing a mechanical inertial of the motor assembly to a predetermined rotational speed while substantially minimizing an amount of time that is needed to bring the mechanical inertia to the predetermined rotational speed.
163 Citations
8 Claims
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1. A tool comprising:
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a motor assembly with a flywheel that is driven by an electric motor; a driver that is selectively engage-able with an edge of the flywheel to transmit energy therebetween to cause the driver to translate along a driver axis; and wherein the electric motor is selected such that a function relating a ratio of energy loss of the motor to a time to attain a predetermined angular speed is substantially minimized; wherein the motor assembly includes a roller that is movable between an unactuated position and an actuated position, wherein positioning of the roller in the actuated position drives the driver into the edge of the flywheel; wherein the roller is mounted on an activation arm assembly that includes a first arm, a second arm and a third arm, the first arm being pivotally coupled to a structure to which the motor is mounted, the second arm being pivotally coupled to the first arm, the third arm being pivotally coupled to the second arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification