Actuator including rotor case and housing with sealing unit...

Details Actuator including rotor case and housing with sealing unit... Actuator including rotor case and housing with sealing unit...

2008-05-20

2008-05-20

Tamai, Karl (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S049030, C310S083000, C310S088000, C310S089000, C310S090000, C251S129110

Reexamination Certificate

active

07375446

ABSTRACT:
An actuator for use with a fluid channel structure comprises: a stator assembly including stator yokes, and a coil; and a rotor assembly including a housing shaped in a circular hollow-cylinder, an output shaft inserted through the housing, a sleeve, a magnet fixedly attached to the sleeve, and a rotor case. In the actuator described above, the housing includes first and second sealing units having elasticity and disposed at the outer circumference of the circular hollow-cylinder. The first sealing unit makes elastic contact with a wall of a fluid channel of the fluid channel structure, and the rotor case has a cup-like configuration and has an open end portion thereof engaging with the circular hollow-cylinder portion of the housing and pressing on the elastic second sealing unit. Thus, hermetic structure is surely achieved.

REFERENCES:
patent: 6224034 (2001-05-01), Kato et al.
patent: 2003/0201413 (2003-10-01), Hirota et al.
patent: 0 987 477 (2000-03-01), None
patent: 1 482 224 (2004-12-01), None
patent: 09-285100 (1997-10-01), None
patent: 11-030356 (1999-02-01), None
patent: 2003-322274 (2003-11-01), None

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