Activation arm configuration for a power tool
First Claim
Patent Images
1. A power tool comprising:
- a structure;
a flywheel coupled to the structure;
a driver that is translatable along a driver axis; and
an activation arm assembly having a first arm, a second arm, a third arm, a roller, a first spring and a second spring, the first arm being pivotally coupled to the structure at a first point, the second arm being pivotally coupled to the first arm at a second point, the third arm being pivotally coupled to the second arm at a third point, the roller being mounted on the third arm, the first spring biasing the second arm about the second point in a rotational direction toward the driver, the second spring biasing the third arm about the third point in the rotational direction toward the driver;
wherein rotation of the activation arm about the first point in the rotational direction toward the driver engages the driver to both the roller and the flywheel to thereby transfer energy from the flywheel to the driver.
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Abstract
A driving tool, such as a nailer, with a flywheel, a driver and an activation arm assembly that is configured to drive the driver into contact with the flywheel to permit energy to be transmitted between the flywheel and the driver so that the driver will translate along an axis.
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Citations
22 Claims
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1. A power tool comprising:
a structure;
a flywheel coupled to the structure;
a driver that is translatable along a driver axis; and
an activation arm assembly having a first arm, a second arm, a third arm, a roller, a first spring and a second spring, the first arm being pivotally coupled to the structure at a first point, the second arm being pivotally coupled to the first arm at a second point, the third arm being pivotally coupled to the second arm at a third point, the roller being mounted on the third arm, the first spring biasing the second arm about the second point in a rotational direction toward the driver, the second spring biasing the third arm about the third point in the rotational direction toward the driver;
wherein rotation of the activation arm about the first point in the rotational direction toward the driver engages the driver to both the roller and the flywheel to thereby transfer energy from the flywheel to the driver.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power tool comprising:
a structural backbone;
a flywheel coupled to the structural backbone;
a driver that is translatable along a driver axis;
an activation arm assembly having a first arm, a second arm, a third arm, and a roller, the first arm being pivotally coupled to the structure at a first point, the second arm being pivotally coupled to the first arm at a second point, the third arm being coupled to the second arm and supporting the roller; and
an actuator for selectively pivoting the first arm about the first point in a first rotational direction to drive the roller against the driver and into engagement with the flywheel.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A power tool comprising:
a structural backbone;
a flywheel mounted on the structural backbone;
a driver that is translatable along a driver axis; and
an activation arm assembly having a first arm, a second arm, a third arm, a roller, a first spring and a second spring, the first arm being pivotally coupled to the structural backbone at a first point, the second arm being pivotally coupled to the first arm at a second point, the third arm being pivotally coupled to the second arm at a third point, the roller being mounted on the third arm, the first spring biasing the second arm about the second point in a first rotational direction, the second spring biasing the third arm about the third point in the first rotational direction;
an actuator for selectively pivoting the first arm about the first point in the first rotational direction to drive the roller against the driver and into engagement with the flywheel; and
a clutch for inhibiting movement of the first arm bout the first point in a second rotational direction opposite the first rotational direction in response to a force exerted by the driver onto the roller.- View Dependent Claims (20, 21, 22)
Specification