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