ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,100, issued on March 18, was assigned to Dresser LLC (Houston).
"Eliminating bleed on flow controls" was invented by Harold Randall Smart (Portsmouth, R.I.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An amplifier is configured for use in a control valve. These configurations provide a pneumatic signal to an actuator that regulates flow through the device. The amplifier may include a variable orifice, or bleed valve, that moves in response to changes in actuating media around steady state. This bleed valve prevents bleed of actuating media at steady state. This feature reduces energy consumption or emissions from the control valve."
The patent w...