David J Herman

US Patent:

7692127, Apr 6, 2010

Filed:

Mar 26, 2007

Appl. No.:

11/729086

Inventors:

Eric H. Linn - Fort Mill SC, US
Michael A. Deeds - Port Tobacco MD, US
David Herman - Charlotte NC, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

F42B 15/01
F42B 10/00
B81B 7/00
F42B 15/00

US Classification:

244 321, 244 31, 244 315

Abstract:

A MEMS apparatus includes a substrate; electrical contacts disposed on the substrate; a thermal arch beam supported by and connected between the contacts, the thermal arch beam including a midpoint and a protrusion located at about the midpoint; a lever having an axis of rotation and a bearing surface upon which the protrusion is operable to bear, a pair of lever supports disposed on the substrate for rotatably supporting the lever about the axis of rotation, an area of contact between the protrusion and the bearing surface being positioned vertically between the axis of rotation and the plane of the substrate. A voltage difference between the electrical contacts causes the thermal arch beam to move horizontally in the plane and the protrusion to bear against the lever causing rotation of the lever out of the plane.

US Patent:

7728265, Jun 1, 2010

Filed:

Mar 26, 2007

Appl. No.:

11/729088

Inventors:

Michael A. Deeds - Port Tobacco MD, US
David Herman - Charlotte NC, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

F41G 7/00
F42B 12/20

US Classification:

244 321, 244 329, 244198, 2441993, 244213, 102501, 102490

Abstract:

A MEMS type flow actuated out-of-plane flap apparatus includes a substrate defining a plane; a duct attached to the substrate, the duct and the substrate defining a fluid flow channel; and a rotatable flap having a flow receiving portion and an extension portion. The flow receiving portion being disposed in the fluid flow channel where, in an actuated position of the flap, a fluid flow against the flow receiving portion causes rotation of the flap and movement of the extension portion out of the plane of the substrate.

US Patent:

7968344, Jun 28, 2011

Filed:

Mar 11, 2010

Appl. No.:

12/721993

Inventors:

Joseph J Lambert - Charlotte NC, US
Timothy A Zawatsky - Charlotte NC, US
David L Herman - Charlotte NC, US

Assignee:

CEM Corporation - Matthews NC

International Classification:

G01N 21/01
G01N 33/00
B01L 3/00

US Classification:

436 86, 422430, 422 50

Abstract:

A protein analysis kit is disclosed. The kit includes a sample cup for mixing a protein sample with a dye-binding solution and a filter holder for being positioned in the sample cup. The filter holder includes a filter media and a depending spout below the filter media that reaches bottom portions of the cup when the filter media is positioned above the cup.

US Patent:

8147759, Apr 3, 2012

Filed:

Aug 29, 2007

Appl. No.:

11/846598

Inventors:

Joseph J. Lambert - Charlotte NC, US
Timothy A. Zawatsky - Charlotte NC, US
David L. Herman - Charlotte NC, US

Assignee:

CEM Corporation - Matthews NC

International Classification:

G01N 21/78

US Classification:

422 8209, 422 681, 422 8205

Abstract:

A direct rapid automated protein analyzer is disclosed. The protein analyzer includes means for reducing protein samples to small particles, a reaction vessel in material transfer communication with the homogenizer, a reservoir for binding dye composition in fluid communication with the reaction vessel, a metering pump in fluid communication with the reservoir and the reaction vessel for distributing discrete predetermined amounts of a binding dye composition to the reaction vessel, a filter in fluid communication with the reaction vessel for separating solids from filtrate after a dye binding reaction has taken place in the reaction vessel, and a calorimeter in fluid communication with the filter and the reaction vessel for measuring the absorbance of the filtrate from the reaction vessel and the filter. The rapid analyzer can be used in conjunction with a kit that includes a sample cup for mixing a protein sample with a dye-binding solution and a filter holder for being positioned in the sample cup. The filter holder includes a filter media and a depending spout below the filter media that reaches bottom portions of the cup when the filter media is positioned above the cup.

US Patent:

8405012, Mar 26, 2013

Filed:

Mar 26, 2007

Appl. No.:

11/729089

Inventors:

David Herman - Charlotte NC, US
Michael Deeds - Port Tabacco MD, US

Assignee:

The United States of America as Represented by the Secretary of the Navy - Washington DC

International Classification:

F42B 15/01
H01L 29/84
G01L 9/00

US Classification:

244 327, 257415, 257419

Abstract:

A MEMS type actuator includes a substrate defining a plane; a micro bellows disposed on the substrate and operable to expand in a direction out of a substrate plane, the substrate having an opening therein for fluid flow to the micro bellows; and a ramp disposed above the micro bellows. In a collapsed position of the micro bellows, the ramp is substantially parallel to the plane of the substrate and, in expanded positions of the micro bellows, the micro bellows applies a force to the ramp thereby causing rotation of the ramp in a direction out of the substrate plane.

US Patent:

20090087917, Apr 2, 2009

Filed:

Aug 4, 2008

Appl. No.:

12/185575

Inventors:

Joseph J. Lambert - Charlotte NC, US
Timothy A. Zawatsky - Charlotte NC, US
David L. Herman - Charlotte NC, US

Assignee:

CEM CORPORATION - Matthews NC

International Classification:

G01N 21/78

US Classification:

436 86

Abstract:

A protein analysis instrument and method are disclosed. The method includes mixing a binding dye composition and a protein sample using a homogenizer, measuring a parameter selected from the group consisting of the speed of the homogenizer and the resistance of the mixture to the homogenizer, adjusting the speed of the homogenizer based upon the measured parameter, pumping unreacted dye composition from the mixture and to a calorimeter, and measuring the absorbance of the dye composition in the calorimeter. Aspects of the invention also include inserting a spout into a sample cup at a position where the spout opening is positioned to avoid foam and precipitate generated by the mixing step and above the bottom of the sample cup and thereafter pumping the dye composition from the mixture in the sample cup through the spout and to a colorimeter.

US Patent:

20100291686, Nov 18, 2010

Filed:

Mar 11, 2010

Appl. No.:

12/721688

Inventors:

Joseph J. Lambert - Charlotte NC, US
Timothy A. Zawatsky - Charlotte NC, US
David L. Herman - Charlotte NC, US

Assignee:

CEM CORP. - Matthews NC

International Classification:

G01N 31/00
G01N 33/00

US Classification:

436 8, 436 86

Abstract:

A dye binding method for protein analysis is disclosed. The method includes the steps of preparing an initial reference dye solution of unknown concentration from an initial reference dye concentrate and creating an electronic signal based upon the absorbance of the initial reference dye solution. Thereafter, an electronic signal is created based upon the absorbance of a dye filtrate solution prepared from the initial reference dye solution and an initial protein sample. The absorbance signals from the reference dye solution and the dye filtrate solution are sent to a processor that compares the respective absorbances and calculates the protein content of the protein sample based upon the difference between the absorbances. An electronic signal is created based upon the absorbance of a successive dye filtrate solution prepared from the reference dye solution and a successive protein sample, and the absorbance signal from the successive sample dye filtrate solution is sent to the processor to calculate the protein content of the successive sample based upon the difference between the absorbance of the initial reference dye solution and the absorbance of the successive dye filtrate solution.

US Patent:

20110036705, Feb 17, 2011

Filed:

Aug 14, 2009

Appl. No.:

12/541262

Inventors:

David A. Barclay - Charlotte NC, US
Joseph J. Lambert - Charlotte NC, US
William E. Jennings - Wingate NC, US
David L. Herman - Charlotte NC, US

International Classification:

B01J 19/12
H05B 6/64
B65D 51/16

US Classification:

20415715, 219679, 2203671

Abstract:

An instrument and method for high pressure microwave assisted chemistry are disclosed. The method includes the steps of applying microwave radiation to a sample in a sealed vessel while measuring the temperature of the sample and measuring the pressure generated inside the vessel and until the measured pressure reaches a designated set point, opening the vessel to release gases until the pressure inside the vessel reaches a lower designated set point, closing the vessel, and repeating the steps of opening the vessel at designated pressure set points and closing the vessel at designated pressure set points to the sample until the sample reaction reaches a designated high temperature. The designated set points can controllably differ from one another as the reaction proceeds. Microwave energy can be applied continuously or intermittently during the opening and closing steps. The apparatus includes a microwave cavity, a microwave transparent pressure resistant reaction vessel in the cavity, a cap on the reaction vessel, a pressure sensor for measuring pressure in the vessel, a temperature sensor, and means for opening and closing the cap at predetermined pressure set points measured by the pressure sensor to release pressure from the vessel.