Jee Cha resumes & CV records
Resumes
Jee Sung Cha, 5120312 Paseo Del Campo, Northridge, CA 91326
Jee Cha Phones & Addresses
20312 Paseo Del Campo, Porter Ranch, CA 91326
Northridge, CA
Sammamish, WA
3275 Lenox Rd, Atlanta, GA 30324 404-8468156
Dunwoody, GA
Los Angeles, CA
Duluth, GA
Santa Monica, CA
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Publications & IP owners
Us Patents
Multistage Pulse Tube Coolers
US Patent:
2011010, May 5, 2011
Filed:
Nov 3, 2009
Appl. No.:
12/611784
Inventors:
Sidney W. K. Yuan - Los Angeles CA, US
Jee S. Cha - Los Angeles CA, US
Jee S. Cha - Los Angeles CA, US
Assignee:
The Aerospace Corporation - El Segundo CA
International Classification:
F25B 9/14
F02G 1/044
F25B 9/10
F02G 1/044
F25B 9/10
US Classification:
62 6, 62335
Abstract:
Various embodiments are directed to multistage pulse tube coolers. In some embodiments, one or more stages of the pulse tube cooler may comprise a control valve positioned between the hot end of the pulse tube and the reservoir. Also, in various embodiments, one or more inter-stage control valves may be positioned between the pulse tubes of consecutive stages.
Multistage Pulse Tube Coolers
US Patent:
2013028, Oct 31, 2013
Filed:
Jul 1, 2013
Appl. No.:
13/932740
Inventors:
Jee S. Cha - Los Angeles CA, US
International Classification:
F25B 9/00
US Classification:
62 6
Abstract:
A cryocooler may comprise a first stage, a second stage and a phase control device. The first stage may define a first volume. The second stage may define a second volume. The phase control device may be positioned between the first stage and the second stage to receive a flow of working fluid between the first stage and the second stage. The phase control device may comprise a flange and a plunger. The flange may be positioned along a longitudinal axis parallel a direction of the working fluid flow. The plunger may be translatable along the longitudinal axis at least partially within the flange. The plunger and the flange may be sized such that the plunger and the flange define a gap there between and a dimension of the gap is determined by a position of the plunger along the longitudinal axis.
Possible Relatives
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