Valve assembly with connection between an angularly displaceble member and actuator

A valve assembly, comprising:

• a valve having an angularly displaceable valve member, and an actuating shaft connected to said valve member and rotatable about an axis;
• a valve driver provided with an output shaft rotatable about said axis and spaced axially from said actuating shaft for angularly displacing said valve member;
• a connecting housing mounted between said valve and said valve driver and interconnecting said valve and said valve driver, said actuating shaft and said output shaft extending into said connecting housing;
• a coupling member releasably angularly connecting said shafts together in said connecting housing and removably attached between the actuating shaft and said valve driver, said coupling member releasably angularly connecting said shafts together in said connecting housing for transmitting a torque from said output shaft to said actuating shaft and having a side turned toward said valve and formed with:
• a first recess formfittingly receiving an outer end of said actuating shaft, and
• a second recess formfittingly receiving a nut threaded onto said actuating shaft and being disposed between said first recess and said outer end of the actuating shaft, said first recess extending more deeply into the coupling member than the second recess, so that said coupling member prevents voluntary rotation of said nut on said actuating shaft;
• and
• a spring element mounted on said coupling member and urging said coupling member toward said valve wherein said spring urges said first and second recesses around said outer end of said actuator shaft and said nut for allowing at least one of adjustment and tightening of said coupling member and said nut relative to said outer end of said actuating shaft.