Patent ID: 6443118
Filing Date: 2002-09-03
Classification: B25C

Abstract:
A portable, combustion-engined tool, comprising a piston (8); a combustion chamber (1) in which a fuel gas is combusted upon ignition for building up pressure in the combustion chamber for driving the piston (8); an ignition device (20) for igniting the fuel gas in the combustion chamber (1); and gas drain means (43) provided in the combustion chamber (1) for controlling a pressure build-up thereinwherein the gas drain means (43) comprises a drain channel (44) with an adjustable cross-section, and wherein the gas drain means (43) comprises an adjusting screw (45) having a radially extending through-channel (46) and aligned with the drain channel (44) for adjusting the cross-section of the drain channel (44).