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US 9,618,115 B2Granted
Combined oil control ring
AssigneeRiken
InventorsHiroyuki Yabune, Masaaki Fujita, Hiroyuki Sugihara
Life of this patent
Estimating the term…
Abstract
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.
Claims8
A combined oil control ring comprising:
- a pair of circular side rails each having a gap;
- and
- a waved spacer expander longitudinally sandwiched by said side rails, which has seating tabs for pushing inner surfaces of said side rails on an inner side, longitudinal projecting supporting portions for supporting the side rails, each of which projects in a longitudinal direction from the spacer expander, and recessed flat intermediate portions, a radial thickness a1 of said side rail being 50-90% of a height a9 of said spacer expander, a longitudinal width A of said projecting supporting portion being 0.07-0.12 mm, and a height B of said recessed flat intermediate portion being 20-45% of the height a9 of said spacer expander, wherein
- each of said recessed flat intermediate portions is positioned in a radial direction between said seating tab and said projecting supporting portion,
- the radial thickness a1 is from inner diameter to outer diameter of the side rail,
- the height a9 is from inner diameter to outer diameter of the waved spacer expander,
- the longitudinal width A is from a surface of the recessed flat intermediate portion to an upper surface of the projecting supporting portion, and
- the height B of the recessed flat intermediate portion is from an outer edge of the seating tab to an inner edge of the projecting supporting portion.
5 more elements
A combined oil control ring comprising:
- a pair of circular side rails each having a gap;
- and
- a waved spacer expander longitudinally sandwiched by said side rails, which has seating tabs for pushing inner surfaces of said side rails on an inner side, longitudinal projecting supporting portions for supporting the side rails, each of which projects in a longitudinal direction from the spacer expander, and recessed flat intermediate portions, a height a10 of said seating tab being 23-60% of a height a9 of said spacer expander, a longitudinal width A of said projecting supporting portion being 0.07-0.12 mm, and a height B of said recessed flat intermediate portion being 20-45% of the height a9 of said spacer expander, wherein
- each of said recessed flat intermediate portions is positioned in a radial direction between said seating tab and said projecting supporting portion,
- the height a10 of said seating tab is an inner edge to an outer edge of an upper most surface of the seating tab,
- the height a9 is from inner diameter to outer diameter of the waved spacer expander,
- the longitudinal width A is from a surface of the recessed flat intermediate portion to an upper surface of the projecting supporting portion, and
- the height B of the recessed flat intermediate portion is from an outer edge of the seating tab to an inner edge of the projecting supporting portion.
5 more elements
Dependencies are inferred from the claim text.