US 12,070,843 B2
Combustion chamber ring for fastener driving tool
Florian Brelot, Chanas (FR); and Ninad C. Maniar, Gurnee, IL (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Nov. 16, 2022, as Appl. No. 18/056,050.
Claims priority of provisional application 63/282,525, filed on Nov. 23, 2021.
Prior Publication US 2023/0158652 A1, May 25, 2023
Int. Cl. B25C 1/08 (2006.01); B25C 1/00 (2006.01)
CPC B25C 1/08 (2013.01) [B25C 1/008 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A fastener driving tool comprising:
a housing;
a fuel supply assembly in the housing;
a workpiece contact assembly connected to the housing; and
a fastener driving assembly at least partially in the housing, the fastener driving assembly including:
a combustion chamber,
a spark plug receiver configured to receive a spark plug such that an ignition tip of the spark plug is positioned in the combustion chamber,
a cylinder head configured to receive a vaporized fuel dose from the fuel supply assembly and transport the vaporized fuel dose to the combustion chamber,
a static combustion chamber ring connecting the cylinder head to the combustion chamber, the static combustion chamber ring comprises a chamber fuel mixer including a downward sloping surface that extends through a portion of the combustion chamber to direct the vaporized fuel dose in the combustion chamber in a direction away from the ignition tip of the spark plug,
a sleeve suitably connected to the combustion chamber, and
a circulating fan disposed between the sleeve and the static combustion chamber ring.