Patent ID: 8480054

Claim:
A drive arrangement for translating rotary movement from an actuator apparatus to a valve member, the drive arrangement comprising: an input shaft having a first end portion; an output shaft having second end portion: a first yoke including an axially extending first tang torsionally secured to the first end portion: a second yoke including an axially extending second tang torsionally secured to the second end portion; a single piece coupling shaft including a first slot formed in a first end slidably receiving the first tang torsionally coupling the coupling shaft to the first yoke, the coupling shaft including a second slot formed in a second end slidably receiving the second tang torsionally coupling the coupling shaft to the second yoke; wherein the coupling shaft has a limited range of axial and angular translation relative to the first and second yokes; and wherein the first yoke and first end portion have a single degree of freedom therebetween providing pivotal movement, and wherein the second yoke and second end portion have a single degree of freedom therebetween providing pivotal movement.