Back to results
US 7,458,881 B2Granted
Surface treated product, surface treatment method, and surface treatment apparatus
AssigneeAsahi Tec Corporation
InventorsShiro Kawashima, Hiromi Akihori, Matuo Suzuki, Hidekatu Hirahara, Aturo Yamamoto, Katuya Kawamori
Life of this patent
Estimating the term…
Abstract
There is provided a surface treated product that moves relatively in a fluid, wherein a surface of the surface treated product has continuous dimples, each dimple having a diameter of 10 to 2500 μm and a depth of 50 μm or less. The surface treated product significantly reduces resistance of a fluid to an object in the fluid, and significantly improves a flow state of the fluid.
Claims2
An apparatus for treating an internal surface of a hollow casting, the apparatus comprising:
- at least two fixing means, each for fixing a hollow casting, such that a surface of such hollow casting faces a predetermined direction;
- and
- oscillating means for oscillating said fixing means, said oscillating means comprising:
- a prime mover;
- a rotation shaft connected to said prime mover;
- at least two cranks connected to said rotation shaft, each crank for changing a rotational motion of said rotation shaft into a reciprocating motion in a predetermined direction, thereby oscillating such hollow casting;
- oscillating plates, each connected to a respective crank via a rod and to a respective fixing means, said oscillating plates being substantially symmetrically positioned relative to said prime mover;
- wherein each of said oscillating plates comprises a slide guide for causing said oscillating plate to move in a rectilinear motion;
- and
- said oscillating plates are for oscillating at a predetermined frequency, such that each fixing means oscillates in an opposite direction from the other fixing means.
7 more elements
Dependencies are inferred from the claim text.