Curtis S Mcdowell

US Patent:

6869534, Mar 22, 2005

Filed:

May 5, 2003

Appl. No.:

10/430171

Inventors:

Curtis S. McDowell - Allentown PA, US
Chris Hannum - Oley PA, US
Robert Maurer - Shillington PA, US

Assignee:

Brentwood Industries, Inc. - Reading PA

International Classification:

C02F003/00

US Classification:

210620, 210220, 210739, 210745, 2101951, 210 97

Abstract:

The invention relates to an aerobic wastewater digestion unit useful for degrading organic material dissolved or suspended in a wastewater stream. The wastewater is fed to a vessel, wherein it is circulated by a liquid conveyor between the vessel and a downwardly-directed tube. Expulsion of fluid from the tube into the lower portion of the vessel agitates the liquid in the vessel and disperses into the liquid air that has been entrained in the liquid in the tube. The digester can be operated using varying liquid levels, and is amenable to batch, semi-batch, and continuous operation. The digester is suitable for use in combination with other components of wastewater treatment systems, and can be included as a module in modular wastewater treatment systems.

US Patent:

6878280, Apr 12, 2005

Filed:

Apr 16, 2003

Appl. No.:

10/414974

Inventors:

Curtis S. McDowell - Allentown PA, US
Chris Hannum - Oley PA, US
Robert Maurer - Shillington PA, US

Assignee:

Brentwood Industries, Inc. - Reading PA

International Classification:

C02F003/00

US Classification:

210614, 210800, 210803, 210197, 210 97, 210513, 210103, 210740, 210745, 210143, 210528

Abstract:

The invention relates to a liquid clarifier useful for removing solids suspended in a wastewater stream. Settled biological solids are taken from the clarifier and combined in a mixing chamber with a wastewater stream. The combined liquid is provided to a settling region of the clarifier, and suspended solids settle in a biological solids collection region, from which the solids are taken. Clarified liquid can be withdrawn or permitted to overflow from an outlet region in the settling region of the clarifier. The clarifier can enhance the degree of solids removal from wastewater streams having relatively low total suspended solids values, such as outlet streams from fixed film-type digesters. The clarifier is suitable for use in combination with other components of wastewater treatment systems, and can be included as a module in many kinds of wastewater treatment systems.

US Patent:

7491325, Feb 17, 2009

Filed:

Oct 20, 2006

Appl. No.:

11/551538

Inventors:

Timothy E. Krell - Mohrsville PA, US
Robert W. Hartung - Abington PA, US
Curtis S. McDowell - Allentown PA, US

Assignee:

Brentwood Industries, Inc. - Reading PA

International Classification:

C02F 3/06

US Classification:

210150, 210541, 210615, 261DIG 72

Abstract:

An assembly for supporting biomass for treating sludge or wastewater includes a first corrugated sheet having crests and valleys, a second corrugated sheet having crests and valleys and an intermediate member mounted between the first and second corrugated sheets. The crests have peak surfaces and the valleys have trough surfaces. The first corrugated sheet has a first longitudinal axis and the second corrugated sheet has a second longitudinal axis. The corrugations of the first corrugated sheet define a first corrugation angle of about zero degrees (0) to about forty-five degrees (45) relative to the first longitudinal axis and the corrugations of the second corrugated sheet define a second corrugation angle of about zero degrees (0) to about forty-five degrees (45) relative to the second longitudinal axis. The second corrugated sheet is mounted to the first corrugated sheet and the intermediate member has openings therein.

US Patent:

7600214, Oct 6, 2009

Filed:

Jun 21, 2005

Appl. No.:

11/156700

Inventors:

Curtis McDowell - Mountain View CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G06F 9/44

US Classification:

717100

Abstract:

The invention provides a system and method for updating software in the CPU of a network device without interrupting the operation of the network device. The invention determines whether operating state information is recoverable. If it is not recoverable, then it will be stored in a metadata module or reload buffer. When the CPU is rebooted, after a software update or crash, it operates in a special reload mode and is able to recover any system state information not available in the network device from the metadata module.

US Patent:

7731842, Jun 8, 2010

Filed:

Sep 19, 2007

Appl. No.:

11/857566

Inventors:

Curtis S McDowell - Allentown PA, US

Assignee:

Brentwood Industries, Inc. - Reading PA

International Classification:

C02F 3/06

US Classification:

210151, 210220, 210259, 210903

Abstract:

A constant velocity serpentine anoxic reactor incorporates a multiple cell vertical serpentine path, as well as a horizontal serpentine path, through the anoxic chamber. A fixed film media is mounted within each cell of the anoxic chamber to provide a structure on which the bacteria can grow to sustain the biological reaction, which convert nitrates into nitrogen gas. The fixed film media can be a cross-flow media and can optionally include a web of textile material integrated within the fixed film media to enhance bacterial growth within the fixed film media or optionally the anoxic vertical serpentine configuration could be applied to an activated sludge operation. A nitrate recycle pump recycles about 75% of the effluent from the aerobic chamber back into the anoxic chamber to provide a nitrate source for the digestion of the BOD within the influent wastewater.

US Patent:

8468495, Jun 18, 2013

Filed:

Sep 11, 2009

Appl. No.:

12/558288

Inventors:

Curtis McDowell - Mountain View CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

G06F 9/44

US Classification:

717120, 717121

Abstract:

The invention provides a system and method for updating software in the CPU of a network device without interrupting the operation of the network device. The invention determines whether operating state information is recoverable. If it is not recoverable, then it will be stored in a metadata module or reload buffer. When the CPU is rebooted, after a software update or crash, it operates in a special reload mode and is able to recover any system state information not available in the network device from the metadata module.

US Patent:

20130298113, Nov 7, 2013

Filed:

May 14, 2013

Appl. No.:

13/893912

Inventors:

Curtis McDowell - Mountain View CA, US

International Classification:

G06F 9/445

US Classification:

717168

Abstract:

The invention provides a system and method for updating software in the CPU of a network device without interrupting the operation of the network device. The invention determines whether operating state information is recoverable. If it is not recoverable, then it will be stored in a metadata module or reload buffer. When the CPU is rebooted, after a software update or crash, it operates in a special reload mode and is able to recover any system state information not available in the network device from the metadata module.

US Patent:

20140053926, Feb 27, 2014

Filed:

Feb 17, 2010

Appl. No.:

12/707665

Inventors:

Curtis S. McDowell - Allentown PA, US

International Classification:

F15D 1/00

US Classification:

137561 R

Abstract:

A structured sheet cross flow media is formed with a first corrugated sheet having corrugations defining flutes angled in a first direction, a second corrugated sheet defining flutes angled in a second direction, and an interstitial planar sheet disposed between the first and second corrugated sheets. The interstitial planar sheet traps the flow of fluid or gas, such as air, entering one end of the media block within opposing flutes until the end of the interstitial sheet is reached, whereupon the fluid or gas can disperse between the intersecting flutes of the first and second sheets to provide a controlled dispersal of the fluid or gas. In one embodiment, the interstitial sheet terminates at an intermediate height in the media block to define the width of dispersion of air bubbles entering at a single source point.