An elastically deformable elastic coupling member is provided in {TAIL ~ a coupling mechanism} interconnecting the motor and {HEAD ~ the valve element} 
An elastically deformable elastic coupling member is provided in { TAIL ~ a coupling mechanism } interconnecting the motor and { HEAD ~ the valve element }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD