| 摘要 |
A combustion-powered nail gun includes a housing, a combustion chamber wall, and a blocking member. The combustion chamber wall is disposed within the housing. The combustion chamber wall has an inner surface that defines a combustion chamber and an outer surface that is separated from the inner surface of the housing by a space. The combustion chamber wall has an inlet in its upper end and an outlet in its lower end. The combustion chamber wall moves vertically within the housing between an open position wherein the inlet and the outlet are opened and a sealed position wherein the inlet and the outlet are closed. The blocking member is provided for preventing flow of air through the space between the inner surface of the housing and outer surface of the combustion chamber.
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