Internal cumbustion actuated portable tool

Details Internal cumbustion actuated portable tool Internal cumbustion actuated portable tool

B - Operations, Transporting

25

C

B25C 1/08 (2006.01) F02B 71/02 (2006.01)

Patent

CA 2073587

ABSTRACT OF THE DISCLOSURE An internal combustion actuated fastener driving device in which a simple container supply of fuel under pressure carried in a handle portion of the portable housing assembly feeds to a supply chamber controlled by an actuating valve operable in response to a manual actuating procedure to be spring moved into an operative position. The movement of the actuating valve into its operative position communicates a previously formed charge of gaseous fuel under pressure in a separate charge chamber with a series of nozzles so as to discharge in jet stream formations which aspirate fresh air through inlets to mix therewith in a mixing chamber for passage into a combustion chamber in open condition controlled by a main valve. The main valve moves under spring bias into a closed position in response to the depletion of gaseous fuel pressure within the charge chamber in timed relation with the crowding of the spent gases from the combustion chamber by the new combustible mixture. Ignition is in response to the closing of the main valve by a piezoelectric unit. The piston is driven by the energy of the combustion of mixture which initially is at generally atmospheric pressure. The return stroke of the piston is effected by a spring system which is active only at the end of the drive stroke and beginning of the return stroke.

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