Combustion powered tool with combustion chamber delay

摘要

A combustion powered tool has a power source 16 for driving a driver blade (66) to drive a fastener into a workpiece. The tool includes a combustion chamber (36) and a cylinder (58). A valve member (50) is disposed to close the combustion chamber. A piston (64) is associated with the driver blade for movement within the cylinder between start and driving positions. A nosepiece (26) has a workpiece contact element (52) movable relative thereto for causing the valve member (50) to close the combustion chamber (36). A delay apparatus (104) is provided for delaying the opening of the combustion chamber (36) by the valve member (50) until the piston (64) returns to the start position after driving the fastener.