Control arrangement for electro-mechanical tool
First Claim
1. An electric impact tool comprising an impact member, a manually actuated control means, a work responsive control means, an electric motor driven flywheel and a support element, said flywheel and said support element being positionable with respect to each other by a distance less than the thickness of said impact member, and a solenoid responsive to actuation of both said manually actuated and said work responsive control means, for introducing the impact member between the flywheel and support element when spaced from each other by a distance less than the thickness of said impact member.
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Accused Products
Abstract
A control arrangement for an electro-mechanical tool is disclosed. The tool may, for example, be a nailer or stapler, and is provided with an impact member which is frictionally moved in a working stroke by means of an electrically driven flywheel, which presses the impact member against the support element, which may be a counter-rotating flywheel. A solenoid is provided to move the impact member into the bite between the flywheel and support element. A trigger actuated switch and a safety switch actuated by contact of the tool with the workpiece must both be actuated in order to energize the solenoid. Circuitry is disclosed which makes possible the energization of the solenoid by closing both switches in any order, or in a desired particular order, and makes possible the provision of a time delay safety.
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Citations
15 Claims
- 1. An electric impact tool comprising an impact member, a manually actuated control means, a work responsive control means, an electric motor driven flywheel and a support element, said flywheel and said support element being positionable with respect to each other by a distance less than the thickness of said impact member, and a solenoid responsive to actuation of both said manually actuated and said work responsive control means, for introducing the impact member between the flywheel and support element when spaced from each other by a distance less than the thickness of said impact member.
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6. An impact tool comprising
(a) An impact member; -
(b) An electrical motor driven flywheel and a support element positionable with respect to each other by a distance less than the thickness of the impact member; (c) A solenoid for pushing the impact member into the bite between said flywheel and support element when spaced from each other by a distance less than the thickness of said impact member; (d) Means permitting at least one of said flywheel and support element to yield with respect to the other to permit the impact member to pass therebetween, while maintaining force against the impact member; (e) A manually actuated switch; (f) A work responsive switch; and (g) Circuitry requiring said manually actuated switch and said work responsive switch to be concurrently actuated to energize said solenoid.
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- 7. An impact tool for driving a fastening means into a workpiece comprising an impact member, an electric motor driven flywheel and a support element, one of said flywheel and said support element being shiftable between an inoperative position in which the spacing therebetween is wider than the thickness of said impact member and an operative position in which the spacing therebetween is less than the thickness of said impact member, a manually actuated control means, a workpiece responsive control means, and a solenoid responsive to actuation of both said workpiece responsive and manually actuated control means for introducing said impact member between said flywheel and said support element when spaced from each other by a distance less than the thickness of said impact member.
Specification