US 11,938,574 B2
Gas surge prevention using improved flow regulators in welding-type systems
Michael Vincent Hoeger, Appleton, WI (US)
Assigned to ILLINOIS TOOL WORKS INC., Glenview, IL (US)
Filed by ILLINOIS TOOL WORKS INC., Glenview, IL (US)
Filed on Jan. 22, 2021, as Appl. No. 17/155,882.
Prior Publication US 2022/0234129 A1, Jul. 28, 2022
Int. Cl. B23K 9/32 (2006.01); B23K 9/095 (2006.01); B23K 9/16 (2006.01)
CPC B23K 9/325 (2013.01) [B23K 9/0953 (2013.01); B23K 9/164 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A welding-type system, comprising:
a first valve in fluid communication with a fluid reservoir;
a second valve in fluid communication with the first valve and a welding tool; and
control circuitry configured to:
receive a flow path pressure measurement of a flow path pressure of a flow path between the first valve and the second valve,
receive an ambient environment pressure measurement of an ambient environment pressure, and
in response to detecting an end of a weld, or an end of a postflow operation following the end of the weld:
close the first valve via a first control signal, and
after closing the first valve, close the second valve via a second control signal in response to determining the flow path pressure measurement is equal to the ambient environment pressure measurement.