When in the position shown in Figure 2.3(a), Gear A receives torque from the pressure
difference while the net torque on Gear B is zero. (b) Gear A drives Gear B. (c) As Gear B
continues to rotate, it traps a defined quantity of fluid until, in this position, the net torque on
Gear A is zero and Gear B receives torque from the pressure difference. (d) Gear B drives