Combined fire ring and carbon scraping insert

Claim 1

A combined fire ring and carbon-scraping cylinder insert for an internal combustion engine including an engine block having a cylinder formed therein and a cylinder head, said combined fire ring and carbon-scraping insert comprising: a. an annular member of L-shaped cross-section; b. said annular member comprising a first leg received in the upper end only of the cylinder and positioned to remove carbon from a piston moving in the cylinder; c. said annular member further comprising a second leg extending radially outwardly from and substantially perpendicular to said first leg, said second leg providing a fire ring extending between the engine block and the cylinder head in sealing engagement therewith; d. said first leg being received in a recess in the upper end of the cylinder to hold said second leg in fixed position between the block and the cylinder head; and e. said second leg extending a substantial distance radially outwardly from said first leg to provide a substantial area of contact with the engine block and the cylinder head; f. wherein said first and second legs are of substantially equal length and thickness.