Powered devices

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2007-10-16

2007-10-16

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C123S0460SC

Reexamination Certificate

active

10554438

ABSTRACT:
Disclosed is a self-priming portable powered device such as a tool, comprising a housing within which are defined a priming combustion chamber and a main combustion chamber, within which chambers during operation of the device there is a combustion of a combustible fuel and a combustion-supporting gas; and wherein a combustion event in the priming combustion chamber causes the formation of a mixture of fuel and combustion-supporting gas in the main combustion chamber which is compressed at a pressure above ambient pressure, subsequent combustion of the compressed mixture in the main combustion chamber acting on a work piston which, directly or indirectly, performs the intended task.

REFERENCES:
patent: 2003/0131809 (2003-07-01), Adams
patent: WO-01/32243 (2001-05-01), None
patent: WO-01/89612 (2001-11-01), None
patent: WO-03/033058 (2003-04-01), None

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