Shaft with grooves for dynamic pressure generation and motor emp

Details Shaft with grooves for dynamic pressure generation and motor emp Shaft with grooves for dynamic pressure generation and motor emp

1992-08-05

1994-05-24

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

384107, H02K 516, F16C 3206

Patent

active

053151968

ABSTRACT:
A resist 4 is printed on the areas where the dynamic pressure generating grooves 2 are to be formed, on curved surface of a shaft core member 1a. After the resist 4 is hardened by baking, hard electroless plating is conducted to form a plated layer 3 of a thickness equal to the depth of the grooves 2. Then the resist 4 is removed to obtain a shaft 1 with dynamic pressure generating grooves 2. The dynamic pressure during rotation is free from fluctuation as the dynamic pressure generating grooves are highly precise and constant in the depth and in the cross-sectional shape.

REFERENCES:
patent: 4487514 (1984-12-01), Mori
patent: 4547081 (1985-10-01), Tanaka et al.
patent: 4557610 (1985-12-01), Asada et al.
patent: 5097164 (1992-03-01), Nakasugi et al.

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