| 摘要 |
This discloses a gas combustion powered apparatus 104, comprising a piston chamber 78 housing a driveable piston, a combustion chamber V2 having a generally flat wall assembly and a cup shaped wall which defines at least one combustion volume between them. The cup shaped wall is moveable in relation to the piston chamber 78 and has a generally flat portion opposing, and generally parallel to, the generally flat wall assembly. There is an ignition source in operable relationship to the combustion volume, which will ignite a combustible gas within it. The piston 16 forms a portion of the wall assembly when in an undriven state, and is returned to the undriven position by vacuum pressure within the combustion chamber V2.
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