Electronically operated portable nail gun
AssigneeSwingline Inc.
InventorsEdward E. Barrett, Dusan Dubovsky, Steven Hahn, Albert Lensky, Morris Pinczewski
Life of this patent
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Abstract
An electronically operated portable nail driving gun is disclosed. Nails are driven into a workpiece by a driver blade which is actuated by a solenoid powered by a source of alternating current. Each actuation of the device produces two successive driving strokes delivered to a nail. The tool is also provideed with means for preventing more than one nail being driven during each actuation of the tool. A preferred embodiment in which the tool is double insulated is also disclosed as are control circuits which permit operation at either 110 V. or 220 V.
Claims12
An electrically operated portable nail gun comprising:
- (a) a hollow body of clam shell construction including an elongated head portion housing an armature assembly which includes:
- (i) a solenoid,
- (ii) a plunger which fits within and slides axially of said solenoid in response to actuation of the tool, and
- (iii) a channeled driver blade electrically insulatingly connected to said plunger, said blade having a plurality of longitudinal channels therein;
- (b) a handle portion projecting rearwardly from said head portion having a trigger for actuating the tool;
- (c) a magazine connected to said handle portion for holding a plurality of nails and for advancing said nails into position to be driven by said driver blade;
- (d) a sheath connected to the forward portion of the magazine, said sheath being configured for driving alignment and sliding engagement with the plurality of channels of said channeled driver blade;
- (e) an electronic trigger control circuit responsive to said trigger which supplies the solenoid with two unidirectional current pulses for impelling the driver blade to provide two successive driving strokes in response to each actuation of the trigger;
- (f) means for preventing more than one nail from being driven during a single actuation of the tool by preventing the advancement of a second nail into the axial path of the driver blade while a first nail is being driven;
- and
- (g) upper and lower solenoid end plates each of which includes an outwardly extending neck about an opening therethrough, and an upper and a lower insulating buffer each of which is configured for mating engagement with the neck of a corresponding end plate.
Dependencies are inferred from the claim text.