초록 ▼

An impact device, useful for driving nails, staples and other fastening elements. The driving member is driven by frictional engagement with a rotating high speed flywheel. The device has a safety provision whereby it cannot be actuated until the nose of the device is pressed against a work piece. T

An impact device, useful for driving nails, staples and other fastening elements. The driving member is driven by frictional engagement with a rotating high speed flywheel. The device has a safety provision whereby it cannot be actuated until the nose of the device is pressed against a work piece. This action also produces a movement of a support means, such as a roller, towards the rotating flywheel. It should be pointed out that the tool could be designed, in the alternative, with a fixed support means and movable flywheel. Actuation of the trigger moves the driving member into engagement between the support and the rotating flywheel, and the flywheel propels the driving element in a fastener driving direction. The support means is provided with a leaf spring permitting it to yield so that the driving member can pass between the flywheel and the support means while maintaining frictional engagement between the flywheel and the driving member. Inertia of the support means aids in efficient engagement of the flywheel with the driving member. The driver is connected to an elastic member, so that when the tool is lifted from the work, the movable support means is moved away from the fixed flywheel, and the elastic member then retracts the driving member between the flywheel and the support means to a position out of contact therewith. The flywheel can be driven by any of several drive means including compressed air, internal combustion and electric drive means. The preferred embodiment is powered by a single electric motor.

대표청구항 ▼

An impact tool comprising: (a) an impact member; (b) a rotatable flywheel and means to drive the same, and support means spaced apart by less than the thickness of the impact member; (c) means for introducing the impact member between said flywheel and said support means; and (d) means permitting at

An impact tool comprising: (a) an impact member; (b) a rotatable flywheel and means to drive the same, and support means spaced apart by less than the thickness of the impact member; (c) means for introducing the impact member between said flywheel and said support means; and (d) means permitting at least one of said flywheel and support means to yield with respect to the other to permit the impact member to pass therebetween, while maintaining force against the impact member.