LP Gas-operated impact tool

Details LP Gas-operated impact tool LP Gas-operated impact tool

1981-08-17

1983-11-15

Rosenbaum, Mark

Elongated-member-driving apparatus

Explosive-type driving means

With plunger

B25C 108

Patent

active

044151101

ABSTRACT:
A two-cylinder two-cycle LP gas operated internal combustion engine provides high speed high energy impacting for driving nails or the like. The two cylinders are geared together by rack and pinion gearing so that the expansion stroke of the smaller first piston provides the compression stroke of the larger impact piston. A first piezoelectric igniter in the nailing end of the tool is actuated by pressing the tool against the material to be nailed and fires a spark plug in the first cylinder. A cam connected to the shaft of the pinion gear intercoupling the two pistons, triggers a second piezoelectric igniter that fires a plug in the second cylinder to drive the impact piston and its attached hammer rod to drive one nail in a nail magazine in the end of the tool. The impacting high energy expansion stroke of the second cylinder provides the next compression stroke of the smaller first cylinder which is again fired by the next actuation of the first piezoelectric igniter.

REFERENCES:
patent: 2876751 (1959-03-01), Kolthoff, Jr.
patent: 3967771 (1976-07-01), Smith
patent: 4185508 (1980-01-01), Hardt

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