Patent ID: 7134585

Claim:
Combustion powered setting device for driving fastening elements, such as nails, bolts and pins into receiving material, comprising a fuel source ( 11 ), a fuel line ( 12 . 1 , 12 . 2 ) extending from said fuel source ( 11 ) to a combustion chamber ( 13 ), at least one metering device ( 20 ) located in the fuel line ( 12 . 1 , 12 . 2 ) between said fuel source ( 11 ) and the combustion chamber ( 13 ), an automatic adjusting device ( 30 ) in said metering device ( 20 ) for providing a metered volume of fuel, and said adjusting device ( 30 ) automatically responding to the fuel pressure, wherein said metering device ( 20 ) has a metering chamber ( 21 ) connected to said feed line ( 21 ), a displacing body ( 22 ) having a stroke and arranged to be moved into said metering chamber ( 21 ) and the stroke of said displacing body ( 22 ) is automatically adjustable by said adjusting device ( 30 ), and wherein said adjusting device ( 30 ) has a pressure receiving chamber ( 31 ), a pressure sensitive member ( 32 ) extendible into said pressure receiving chamber ( 31 ), an actuating member ( 33 ) displaceable by said pressure-sensitive member ( 32 ), and a pretensioned spring element ( 34 ) in contact with said pressure sensitive member ( 33 ) biasing said pressure sensitive member ( 32 ) into said pressure receiving chamber ( 31 ).