Birch, Stewart, Kolasch & Birch, LLP
Combined oil control ring
A combined oil control ring comprising a pair of circular side rails each having a gap, and a waved spacer expander longitudinally sandwiched by the side rails, which has seating tabs for pushing inner surfaces of the side rails on the inner side, (a) the radial thickness a1 of the side rail being 50-90% of the height a9 of the spacer expander, or (b) the height a10 of the seating tab being 23-60% of the height a9 of the spacer expander.
KABUSHIKI KAISHA RIKEN
F F
F16J F16J
inventional inventional
Masaaki Hiroyuki Hiroyuki
Fujita Yabune Sugihara