Patent ID: 6768234
Filing Date: 2004-07-27
Classification: F16K,H02K,Y10T

Abstract:
An apparatus comprising:a motor including a drive shaft, said motor being operable to rotate said drive shaft when power is supplied to said motor, and being operable to lock a position of said drive shaft when power is not supplied to said motor; a cover main body covering said motor, said cover main body being attached to said motor such that said motor is rotated when said cover main body is rotated; a rotary valve including a valve stem connected to said drive shaft; and a mechanism operable to switch a rotation operation of said drive shaft between an electrical rotation operation, during which said drive shaft is driven by said motor so as to rotate said valve stem, and a manual rotation operation, during which said drive shaft locked in position by said motor is driven by a manual rotation of said cover main body so as to rotate said valve stem.