Anthony L Hansen

US Patent:

7168292, Jan 30, 2007

Filed:

May 14, 2004

Appl. No.:

10/846103

Inventors:

Lara A. Gundel - Berkeley CA, US
Michael G. Apte - Berkeley CA, US
Anthony D. Hansen - Berkeley CA, US
Douglas R. Black - Oakland CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01N 37/00
G01N 23/00
G01N 25/00

US Classification:

73 2801, 73 2402

Abstract:

The apparatus described herein is a miniaturized system for particle exposure assessment (MSPEA) for the quantitative measurement and qualitative identification of particulate content in gases. The present invention utilizes a quartz crystal microbalance (QCM) or other mass-sensitive temperature compensated acoustic wave resonator for mass measurement. Detectors and probes and light sources are used in combination for the qualitative determination of particulate matter.

US Patent:

20110120611, May 26, 2011

Filed:

Nov 22, 2010

Appl. No.:

12/951369

Inventors:

Anthony D.A. Hansen - Berkeley CA, US

International Classification:

B60C 29/04

US Classification:

152429

Abstract:

An apparatus and method are described for extracting useful work from pressure transients in a pneumatic tire to replace lost air from the tire. The apparatus and method operate continuously and without human intervention. When also used with a pressure relief valve, the apparatus and method permit the tires that are being driven to be maintained at a desired average pressure.

US Patent:

20120096925, Apr 26, 2012

Filed:

Oct 21, 2011

Appl. No.:

13/279037

Inventors:

Anthony D.A. Hansen - Berkeley CA, US
Jeffrey R. Blair - San Francisco CA, US

Assignee:

MAGEE SCIENTIFIC CORPORATION - Berkeley CA

International Classification:

G01N 1/44

US Classification:

73 2804

Abstract:

An improved analyzer and method of analyzing the content of carbon-containing particles in samples filtered from an air stream is presented. The air stream may be, for example and without limitation, ambient air impacted by pollution; air breathed in an occupational situation such as the atmosphere in a factory or mine; or a combustion exhaust stream such as an engine tailpipe, a chimney, or a smoke plume. The analyzer may operate without the use of bottled gases, such as unfiltered air, and may be operated to provide a very large dynamic range.

US Patent:

20120229798, Sep 13, 2012

Filed:

Mar 6, 2012

Appl. No.:

13/413580

Inventors:

Grisa Mocnik - Ljubljana, SI
Anthony D.A. Hansen - Berkeley CA, US
Jeffrey R. Blair - San Francisco CA, US

Assignee:

MAGEE SCIENTIFIC CORPORATION - Berkeley CA

International Classification:

G01J 3/00
G01N 21/00

US Classification:

356 51, 356338

Abstract:

A method is provided for diagnosing the operation of a photometric particle analyzer. The method may determine when the operation is degraded from normal operating conditions, automatically, and the result displayed locally as well as being transmitted to a remote observer. The present invention may be used by optical photometric particle analyzers, or by analyzers that measure other properties of particles collected on filters.

US Patent:

48939340, Jan 16, 1990

Filed:

Jan 25, 1988

Appl. No.:

7/148328

Inventors:

Anthony D. Hansen - Berkeley CA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 2101
G01N 2159

US Classification:

356434

Abstract:

An improved aethalometer (10) having a single light source (18) and a single light detector (20) and two light paths (21, 22) from the light source (18) to the light detector (20). A quartz fiber filter (13) is inserted in the device, the filter (13) having a collection area (23) in one light path (21) and a reference area (24) in the other light path (22). A gas flow path (46) through the aethalometer housing (11) allows ambient air to flow through the collection area (23) of the filter (13) so that aerosol particles can be collected on the filter. A rotating disk (31) with an opening (33) therethrough allows light for the light source (18) to pass alternately through the two light paths (21, 22). The voltage output of the detector (20) is applied to a VCO (52) and the VCO pulses for light transmission separately through the two light paths (21, 22 ) are counted and compared to determine the absorption coefficient of the collected aerosol particles.

US Patent:

H5720, Feb 7, 1989

Filed:

Sep 28, 1987

Appl. No.:

7/101534

Inventors:

Anthony D. Hansen - Berkeley CA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 2100

US Classification:

356439

Abstract:

An optical analyzer (10) wherein a sample (19) of particulate matter, and particularly of organic matter, which has been collected on a quartz fiber filter (20) is placed in a combustion tube (11), and light from a light source (14) is passed through the sample (19). The temperature of the sample (19) is raised at a controlled rate and in a controlled atmosphere. The magnitude of the transmission of light through the sample (19) is detected (18) as the temperature is raised. A data processor (23), differentiator (28) and a two pen recorder (24) provide a chart of the optical transmission versus temperature and the rate of change of optical transmission versus temperature signatures (T and D) of the sample (19). These signatures provide information as to physical and chemical processes and a variety of quantitative and qualitative information about the sample (19). Additional information is obtained by repeating the run in different atmospheres and/or different rates of heating with other samples of the same particulate material collected on other filters.

US Patent:

20190113431, Apr 18, 2019

Filed:

Oct 15, 2018

Appl. No.:

16/160637

Inventors:

- Washington DC, US
Anthony D.A. HANSEN - Berkeley CA, US
Anna-Marie HYATT - Las Vegas NV, US

Assignee:

GOVERNMENT OF THE UNITED STATES AS REPRESENTED BY THE ADMINISTRATOR OF THE U.S. ENVIRONMENTAL PRO - Washington DC

International Classification:

G01N 15/06
G01N 21/27
C09D 11/322
G03G 15/16
C09D 11/324

Abstract:

The method of the invention provides a simple, reproducible reference, or set of reference standards, as a validation of a calibration standard for filter-based measurements of light absorbing aerosol particles (black carbon and brown carbon) and organic carbon and elemental carbon particles found in indoor and outdoor environments, and in emission streams. The set of reference standards comprise grayscale images deposited by a mist or print at a known density on a substrate material. The reference standards may be made by a printer using as a substrate either paper or another material such as glass fiber, quartz fiber, polypropylene, or cellulose.