Piston ring structure

A piston ring structure comprising

• first and second split ring members, each of said members being a flat member having a uniform generally rectangular cross-section;
• the confronting ends of each ring member including radially interengaging tongues defining a sealed joint to prevent radial blowby, one end of each ring member including an outer tongue defining a part of the outer peripheral wall thereof;
• said first and second ring members being disposed in contiguous side-by-side relation with said one ends being disposed in overlapping angularly spaced relation;
• and silver solder joint means joining said one ends of said first and second members to define a rigid assembly of said members;
• said silver solder joint means being disposed immediately adjacent to each of said outer tongues to prevent movement of said outer tongues relative to the respective adjacent ring member;
• and the other end of each ring member, including an inner tongue, being radially confined by its respective outer tongue;
• said one ends of said first and second ring members being angularly overlapped through a substantial angle;
• and said silver solder joint means including a first silver solder joint disposed immediately adjacent to the outer tongue of said first ring member, and a second silver solder joint disposed immediately adjacent to the outer tongue of said second ring member.