×

Powder feed control system and method

  • US 10,401,246 B2
  • Filed: 05/31/2017
  • Issued: 09/03/2019
  • Est. Priority Date: 05/31/2017
  • Status: Active Grant
First Claim
Patent Images

1. A powder feed rate control system comprising:

  • a hopper adapted to contain a powder and to maintain a hopper pressure;

    a carrier conduit delivering a carrier gas flow and having an orifice, said carrier gas flow conveying powder entering through the orifice at a powder feed rate;

    a differential pressure transducer comprising;

    a first pressure input indicative of the hopper pressure; and

    a second pressure input indicative of the carrier gas flow downstream of the hopper;

    said differential pressure transducer (PT) outputting a signal related to a differential pressure between the first pressure input and the second pressure input; and

    an electro-pneumatic regulator (EP) directly coupled to the differential pressure transducer (PT) and receiving the signal related to the differential pressure and adapted to communicate with a control,wherein the system is configured to maintain the differential pressure in real-time regardless of process pressure changes and without any input from the control.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×