Elbow fitting with step feature for pneumatic transport system

Details Elbow fitting with step feature for pneumatic transport system Elbow fitting with step feature for pneumatic transport system

2007-11-27

2007-11-27

Hewitt, James M. (Department: 3679)

Pipe joints or couplings

Elbow

C406S193000, C406S195000

Reexamination Certificate

active

11117980

ABSTRACT:
An elbow fitting is used in a pneumatic product conveying system in which the fitting expands from the inlet pipe along the outer side of the elbow fitting to enable a layer of accumulated product particles to be formed so as to move at a lower velocity than the velocity of the incoming product stream while establishing a moving contact surface for deflecting incoming product particles toward the outlet pipe with a minimum of pressure resistance and product attrition. The accumulated product particles are discharged from the elbow fitting by incorporating a step in the outer surface of the elbow fitting to create a Bernoulli effect causing the accumulated product particles to enter the air flow after the incoming flow of product particles has ceased. The particles in the accumulated layer are replenished from the incoming flow during operation of the elbow fitting.

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