US 12,106,929 B2
Refillable ion chamber with automated purging system
Amir Shojaei, Aliso Viejo, CA (US); Philip Adamson, Palo Alto, CA (US); and Flavio Poehlmann-Martins, Fremont, CA (US)
Assigned to VARIAN MEDICAL SYSTEMS, INC., Palo Alto, CA (US)
Filed by Varian Medical Systems, Inc., Palo Alto, CA (US)
Filed on Apr. 25, 2023, as Appl. No. 18/306,381.
Application 18/306,381 is a continuation of application No. 17/195,509, filed on Mar. 8, 2021, granted, now 11,651,931.
Prior Publication US 2023/0260738 A1, Aug. 17, 2023
Int. Cl. H01J 37/08 (2006.01); H01J 37/16 (2006.01)
CPC H01J 37/08 (2013.01) [H01J 37/16 (2013.01); H01J 2237/022 (2013.01); H01J 2237/166 (2013.01); H01J 2237/1825 (2013.01); H01J 2237/186 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A gas replacement apparatus, the gas replacement apparatus comprising:
an ion chamber, the ion chamber including a housing enclosing a gas and an electrode, the housing including,
a first hermetically sealed chamber enclosing a first portion of the gas, and
a second hermetically sealed chamber enclosing a second portion of the gas; and
a valve assembly including a first valve and a second valve, the first valve being coupled to the first hermetically sealed chamber and the second valve being coupled to the second hermetically sealed chamber.