Patent ID: 6939088

Claim:
A pneumatic transfer system having a modular pneumatic shifting device, the system comprising: a teller side conduit having an interior, a first end and a second end; a teller sending and receiving station adjacent the first end of the teller side conduit; a customer side conduit having an interior, a first end and a second end; a customer sending and receiving station adjacent the first end of the customer side conduit; a shifting device comprising a housing having a teller side aperture connected to the second end of the teller side conduit and a customer side aperture connected to the second end of the customer side conduit; a center transfer tube connecting the teller side aperture and the customer side aperture; at least one movoable teller gate within the housing adjacent the teller side aperture, the teller gate intermittently obstructing the teller side aperture; at least one moveable customer gate within the housing adjacent the customer side aperture, the customer gate intermittently obstructing the customer side aperture; at least one differential pressure generating mechanism connected to the housing; at least one teller sensor having a sensing portion sized and shaped to fit within the teller conduit sensing when an object sized and shaped to fit within the conduit moves past the sensing portion of the teller sensor, the teller sensor intermittently activating movement of the teller gate, customer gate and differential pressure generating mechanism; at least one customer sensor having a sensing portion sized and shaped to fit within the customer conduit sensing when an object sized and shaped to fit within the conduit moves past the sensing portion of the customer sensor, the customer sensor intermittently ativaduig movement of the teller gate, customer gate and differential pressure generating mechanism; at least one shifter sensor having a sensing portion within the center transfer tube sensing when an object sized and shaped to fit within the conduit moves past the sensing portion of the shifter sensor.