Richard F Chun

US Patent:

7837937, Nov 23, 2010

Filed:

Jul 5, 2005

Appl. No.:

11/174925

Inventors:

William S. Donaldson - LaVerne CA, US
Richard K. Chun - Alhambra CA, US

Assignee:

Hamilton Sundstrand Corporation - Rockford IL

International Classification:

G01N 21/00

US Classification:

422 58, 422 78, 436155

Abstract:

A biological agent detector detects the presence of any biological agents, such as anthrax or other biological warfare agents, in a sample of air. The biological agent detector includes a bio-concentrator that concentrates an aerosol and a pyrolyzer portion including two detecting devices. One detecting device operates in a sample collection mode and collects a sample of air when the other detecting device operates in a sample analysis mode and analyzes a sample of air. After a predetermined amount of time, the detecting devices switch functions, providing continuous sampling of air.

US Patent:

7977113, Jul 12, 2011

Filed:

Nov 16, 2010

Appl. No.:

12/947026

Inventors:

William S. Donaldson - LaVerne CA, US
Richard K. Chun - Alhambra CA, US

Assignee:

Hamilton Sundstrand Corporation - Rockford IL

International Classification:

G01N 25/22

US Classification:

436158, 436147, 436155, 422 63, 422 64, 422 78, 422 83, 422 94, 422401, 422402, 73 232

Abstract:

A biological agent detector detects the presence of any biological agents, such as anthrax or other biological warfare agents, in a sample of air. The biological agent detector includes a bio-concentrator that concentrates an aerosol and a pyrolyzer portion including two detecting devices. One detecting device operates in a sample collection mode and collects a sample of air when the other detecting device operates in a sample analysis mode and analyzes a sample of air. After a predetermined amount of time, the detecting devices switch functions, providing continuous sampling of air.

US Patent:

20060006327, Jan 12, 2006

Filed:

Jul 5, 2005

Appl. No.:

11/174915

Inventors:

William Donaldson - LaVerne CA, US
Richard Chun - Alhambra CA, US

International Classification:

B01D 59/44

US Classification:

250288000, 250284000

Abstract:

A chemical biological detection system detects the presence of biological agents in the air. The system includes a pyrolyzer having an inlet through which air is drawn into the pyrolyzer and a pyrotube that collects a sample of particles extracted from the air. The pyrolyzer further includes an exhaust line that exhausts the air drawn into the pyrolyzer and a sample line that directs the gases eluted from the sample collected in the pyrotube to a mass spectrometer for sample identification. After the sample is collected in the pyrotube, the sample is analyzed. A small droplet of a methylating reagent is added to the sample. If the sample includes any biological agents, the methylating reagent derivatizes organic materials to make them more volatile. The sample is then pyrolyzed, and the eluted gas sample is drawn through the sample line and into the mass spectrometer for identification of any biological agents.

US Patent:

20110209769, Sep 1, 2011

Filed:

Mar 1, 2010

Appl. No.:

12/714662

Inventors:

Richard K. Chun - Alhambra CA, US

International Classification:

F15D 1/00

US Classification:

137 2, 137468

Abstract:

A valve has a housing including a valve seat. A valve pin is supported by a housing through a support shell. The support shell and the valve pin have distinct coefficients of thermal expansion such that when exposed to a temperature change, movement of the support shell moves differently than the pin. In this way, the valve pin can be caused to move toward and away from the valve seat to allow operation of the valve.

US Patent:

20220214254, Jul 7, 2022

Filed:

Mar 18, 2022

Appl. No.:

17/698229

Inventors:

- Charlotte NC, US
Richard K. Chun - Alhambra CA, US

Assignee:

Hamilton Sundstrand Corporation - Charlotte NC

International Classification:

G01N 1/40
G01N 1/22
G01N 27/622
G01Q 30/02
H01J 49/04

Abstract:

A thermal desorber assembly includes a housing and a desorption heater element mounted in the housing with a sample cavity defined between the desorption heater element and an inner wall of the housing. An outlet port is defined in the housing. A flow channel connects the sample cavity in fluid communication with the outlet port for conveying analytes from the sample cavity to the outlet port for introducing the analytes to a spectrometer.

US Patent:

20210018409, Jan 21, 2021

Filed:

Jul 16, 2019

Appl. No.:

16/513203

Inventors:

- Charlotte NC, US
Richard K. Chun - Alhambra CA, US

International Classification:

G01N 1/40
G01Q 30/02
G01N 27/62
H01J 49/04
G01N 1/22

Abstract:

A thermal desorber assembly includes a housing and a desorption heater element mounted in the housing with a sample cavity defined between the desorption heater element and an inner wall of the housing. An outlet port is defined in the housing. A flow channel connects the sample cavity in fluid communication with the outlet port for conveying analytes from the sample cavity to the outlet port for introducing the analytes to a spectrometer.

US Patent:

20150028221, Jan 29, 2015

Filed:

Jul 23, 2013

Appl. No.:

13/948622

Inventors:

- Charlotte NC, US
Richard K. Chun - Alhambra CA, US

Assignee:

HAMILTON SUNDSTRAND CORPORATION - Charlotte NC

International Classification:

H01J 37/08

US Classification:

250424

Abstract:

A method of ion source fabrication for a mass spectrometer includes simultaneously forming aligned component portions of an ion source using direct metal laser fusing of sequential layers. The method can further include forming the component portions on a base plate made from a ceramic material by applying fused powder to the base plate to build the component portions thereon.