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US 8,534,527 B2Granted
Cordless framing nailer
AssigneeBlack & Decker Inc.
InventorsLee M Brendel, Paul G Gross, Larry E Gregory
Life of this patent
Estimating the term…
Abstract
A driving tool with a driver and a motor-driven flywheel that can be engaged by the driver to propel the driver along a driver axis. The driving tool includes a return mechanism with a rail onto which the driver is received. The rail extends parallel to the driver axis.
Claims19
A driving tool comprising:
- a frame defining a rotational axis and a driver axis;
- a motor coupled to the frame;
- a flywheel rotatably driven by the motor about the rotational axis;
- a rail coupled to the frame;
- a driver that is slidably mounted on the rail and movable along the rail between a returned position and an extended position;
- and
- a follower coupled to the frame and movable between a first position, in which the follower drives the driver into engagement with the flywheel when the driver is in the returned position to transfer energy from the flywheel to the driver to propel the driver on the rail relative to the flywheel along the driver axis toward the extended position, and a second position in which the follower, the driver and the flywheel are not engaged to one another;
- wherein the rail is configured to guide the driver when the driver is moved from the extended position to the returned position wherein a return spring is mounted on the rail, the return spring biasing the driver toward the returned position.
5 more elements
A driving tool comprising:
- a frame defining a rotational axis and a driver axis;
- a nosepiece coupled to the frame;
- a motor coupled to the frame;
- a flywheel rotatably driven by the motor about the rotational axis;
- a pair of rails coupled to the frame, the rails being disposed on opposite sides of the flywheel;
- a driver that is slidably mounted on the rails and received into the nosepiece, the driver being movable along the rails between a returned position and an extended position;
- a pair of springs, each of the springs being received over a corresponding one of the rails and being disposed between the driver and the nosepiece, the springs cooperating to bias the driver into the returned position;
- and
- a follower coupled to the frame and movable between a first position, in which the follower drives the driver into frictional engagement with an outer perimeter of the flywheel to transfer energy from the flywheel to the driver to propel the driver along the rails toward the extended position, and a second position in which the follower, the driver and the flywheel are not engaged to one another;
- wherein the rails are movable relative to the frame in a direction toward the rotational axis when the driver is driven by the follower into engagement with the flywheel.
7 more elements
A driving tool comprising:
- a frame defining a rotational axis and a driver axis;
- a nosepiece coupled to the frame;
- a motor coupled to the frame;
- a flywheel rotatably driven by the motor about the rotational axis;
- a pair of rails extending parallel to the driver axis, the rails being disposed on opposite sides of the flywheel;
- a driver that is mounted on the rails and received into the nosepiece, the driver being movable along the driver axis between a returned position and an extended position;
- a pair of springs, each of the springs being received over a corresponding one of the rails, the springs cooperating to bias the driver into the returned position, each of the springs being helical coil springs with a plurality of adjacent coils, wherein the adjacent coils of the springs are spaced apart by a coil pitch, wherein a first end of each of the springs adjacent the driver employs a first coil pitch, wherein a second, opposite end of each of the springs employs a second coil pitch, wherein the coil pitch varies between the first coil pitch and the second coil pitch between the first and second ends such that the coil pitch progressively decreases with decreasing distance to the second end;
- a follower coupled to the frame and movable between a first position, in which the follower drives the driver into engagement with the flywheel to transfer energy from the flywheel to the driver to propel the driver relative to the flywheel along the driver axis, and a second position in which the follower, the driver and the flywheel are not engaged to one another;
- and
- a pair of impact absorbers, each of the impact absorbers being mounted coaxially on an associated one of the rails and being disposed between the frame and an associated one of the springs.
7 more elements
Dependencies are inferred from the claim text.