Roller type rocker arm
AssigneeRiken
InventorMitsuhiro Maehara
Life of this patent
Estimating the term…
Abstract
A roller-type rocker arm includes a roller shaft. A sliding surface of an outer circumference surface of the roller shaft includes a number of dimples. An inner ring roller is slidably attached to the outer circumference surface of the roller shaft. An inner circumference surface and an outer circumference surface of the inner ring roller include a number of dimples. An outer ring roller is slidably attached to the outer circumference surface of the inner ring roller. An inner circumference surface of the outer ring roller includes a number of dimples.
Claims20
A roller-type rocker arm comprising:
- a roller shaft, wherein a sliding surface of an outer circumference surface of the roller shaft includes a plurality of dimples;
- an inner ring roller slidably attached to the outer circumference surface of the roller shaft, wherein an inner circumference surface and an outer circumference surface of the inner ring roller include a plurality of dimples;
- and
- an outer ring roller slidably attached to the outer circumference surface of the inner ring roller, wherein an inner circumference surface of the outer ring roller includes a plurality of dimples;
- wherein each dimple is anisotropic-shaped having a major axis and a minor axis, the plurality of dimples on each surface being separated in a sliding direction and in a directional orthogonal to the sliding direction.
An apparatus comprising:
- a cam of a camshaft;
- a valve stem of an intake and exhaust valve;
- and
- a rolling-type rocker arm between the cam and the valve stem, wherein the rolling-type rocker arm comprises:
- a roller shaft, wherein a sliding surface of an outer circumference surface of the roller shaft includes a plurality of dimples;
- an inner ring roller slidably attached to the outer circumference surface of the roller shaft, wherein an inner circumference surface and an outer circumference surface of the inner ring roller include a plurality of dimples;
- and
- an outer ring roller slidably attached to the outer circumference surface of the inner ring roller, wherein an inner circumference surface of the outer ring roller includes a plurality of dimples;
- wherein each dimple is anisotropic-shaped having a major axis and a minor axis, the plurality of dimples on each surface being separated in a sliding direction and in a directional orthogonal to the sliding direction.
A roller-type rocker arm comprising:
- a roller shaft, wherein a sliding surface of an outer circumference surface of the roller shaft includes a plurality of dimples;
- an inner ring roller slidably attached to the outer circumference surface of the roller shaft, wherein an inner circumference surface and an outer circumference surface of the inner ring roller include a plurality of dimples;
- and
- an outer ring roller slidably attached to the outer circumference surface of the inner ring roller, wherein an inner circumference surface of the outer ring roller includes a plurality of dimples;
- wherein the roller-type rocker arm is configured to transmit a rotational motion of a cam to an intake and exhaust valve;
- wherein each dimple is anisotropic-shaped having a major axis and a minor axis, the plurality of dimples on each surface being separated in a sliding direction and in a directional orthogonal to the sliding direction;
- and
- wherein the dimple is less than 5 mm in length in the direction of the major axis, less than 1 mm in width in a direction of the minor axis, and less than 1 mm in depth.
Dependencies are inferred from the claim text.