Gear for use in vacuum space
AssigneeKabushiki Kaisha Toshiba
InventorToshio Honda
Life of this patent
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Abstract
The peripheral teeth of a gear body are made of alloy tool steel and coated with a manganese-phosphate-treated layer and then with a solid lubricating film. The alloy tool steel of which the teeth of the gear body cooperates with the manganese phosphate layer to act on the solid lubricating film. The taking-in force of the solid lubricating film can be thus increased at the surface thereof. The bonding strength of the solid lubricating film can be increased as well. This can prevent the solid lubricating films on teeth of the two gear bodies engaged from being separated from each other.
Claims10
A gear for use in vacuum space, comprising:
- a gear body made of alloy tool steel and having teeth;
- a manganese phosphate layer formed on the surface of said gear body;
- and
- a solid lubricating film formed on the manganesephosphate-treated layer.
A gear for use in vacuum space comprising:
- a gear body having teeth, at least those portions of which are adapted to be engaged with the teeth of another gear and are made of alloy tool steel;
- and
- a manganese phosphate layer formed on these engaging portions of the teeth of said gear body;
- and
- a solid lubricating film formed on the manganese phosphate layer.
Dependencies are inferred from the claim text.