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US 7,921,569 B2Granted
Tool assembly apparatus having a recessed tip and a method for its use
AssigneeCrayola LLC
InventorsDavid A. Cziraky, Douglas F. Melville, Jr., Paul Boxmeyer
Life of this patent
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Abstract
A tool assembly is disclosed that provides reciprocating motion to a tip of the assembly. The tool assembly has a drive assembly, a shaft assembly and a retraction mechanism contained within a housing. The tip of the shaft assembly protrudes from the housing during a portion of the stroke of the drive mechanism and upon disengagement of a motor of the drive assembly, the tip of the shaft assembly is recessed within the housing of the tool assembly.
Claims12
A tool assembly for cutting materials comprising,
- a housing having a distal end and a proximate end, a drive mechanism mounted in the housing and comprising a motor and a gearbox assembly, a tip coupled with the drive mechanism, the tip protruding from the distal end of the housing at least at some portion of a stroke of the drive mechanism, and a retraction mechanism for recessing the tip into the housing upon the motor being disengaged, the retraction mechanism comprising a cam and a follower mechanism, the cam being connected to and rotating with an output shaft from the motor and comprising a slot having a first end and second end extending transversely across the cam, the first end of slot being located closer to the distal end of the housing than second end, the follower mechanism engaging the slot.
A tool assembly having a recessible and reciprocating tip, the tool assembly comprising:
- a housing having a distal end and a proximate end;
- a motor having an output shaft, the motor being mounted in the housing;
- a gearbox assembly coupled to the output shaft of the motor, the gearbox assembly translating the rotational drive of the output shaft into a reciprocating motion having a stroke;
- a tip assembly coupled with the gearbox assembly, the tip assembly including a tip end protruding from the distal end of the housing at least at some portion of the stroke of the gearbox assembly mechanism;
- and
- a retraction mechanism comprising a cam and a follower mechanism for recessing the tip into the housing upon the motor being disengaged,
- wherein the cam is connected to and rotates with an output shaft from the motor and the cam comprises a slot having a first end and second end extending transversely across the cam, the first end of slot being located closer to the distal end of the housing than the second end, the follower mechanism comprising a collar having a pin follower mounted thereto and extending transversely therefrom, the pin follower being received in the slot of the cam.
4 more elements
Dependencies are inferred from the claim text.