David M Breen

US Patent:

7542036, Jun 2, 2009

Filed:

Feb 19, 2004

Appl. No.:

10/783201

Inventors:

Ken Museth - Nörrkoping, SE
David Breen - Elkins Park PA, US

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

G06T 17/00

US Classification:

345420

Abstract:

The present invention is level set system for implementing interactive editing operators for surfaces. Level set models are deformable implicit surfaces where the deformation of the surface (editing operation) is controlled by a speed function in the level set partial differential equation. The level set system overcomes the self-interaction problems associated with mesh models. One embodiment takes scan converts input models such as polygon mesh, NURBS, CSGS models into level set models. An interface is provided by which models can be edited with editing operators such as blending, smoothing, embossing, etc. One embodiment utilizes several methods to optimize computations related to the editing operators. For example, shortest distance calculations, bounding boxes, numerical integration, and the sparse-field methods are disclosed for the implementation of the level set deformation operator embodiments including blending, smoothing sharpening, and embossing. The resulting level sets model can be volume rendered or extracted to a polygon mesh.

US Patent:

20080074419, Mar 27, 2008

Filed:

Dec 7, 2007

Appl. No.:

11/952446

Inventors:

KEN MUSETH - NorrKoping, SE
David Breen - Elkins Park PA, US

International Classification:

G06T 17/00

US Classification:

345420000

Abstract:

The present invention is level set system for implementing interactive editing operators for surfaces. Level set models are deformable implicit surfaces where the deformation of the surface (editing operation) is controlled by a speed function in the level set partial differential equation. The level set system overcomes the self-interaction problems associated with mesh models. One embodiment takes scan converts input models such as polygon mesh, NURBS, CSGS models into level set models. An interface is provided by which models can be edited with editing operators such as blending, smoothing, embossing, etc. One embodiment utilizes several methods to optimize computations related to the editing operators. For example, shortest distance calculations, bounding boxes, numerical integration, and the sparse-field methods are disclosed for the implementation of the level set deformation operator embodiments including blending, smoothing sharpening, and embossing. The resulting level sets model can be volume rendered or extracted to a polygon mesh.

US Patent:

45702292, Feb 11, 1986

Filed:

Sep 19, 1983

Appl. No.:

6/533692

Inventors:

David T. Breen - North Wales PA
Howard F. Burghdurf - Sparta NJ
Curtis Huff - Gaithersburg MD

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

G06F 1546
B29C 306

US Classification:

364476

Abstract:

A tablet press controller comprises means for receiving and monitoring a compression signal and providing a data word having a value indicative of the magnitude of the compression signal, data processing means for reading the data word and processing the data word in a pre-established manner, including detecting if the value of the data word exceeds or fails to exceed pre-established limits, and providing tablet press control signals for controlling the operation of the tablet press, including control signals for adjusting the level of powder fill in die cavities, control signals for activating divert gates for rejecting tablets, and signals generated in response to the occurence of one or more undesired vents for shutting down the tablet press.

US Patent:

20210095403, Apr 1, 2021

Filed:

Mar 18, 2019

Appl. No.:

16/981681

Inventors:

- Philadelphia PA, US
Michael David Tanis - Philadelphia PA, US
Amy Lynne Stoltzfus - Philadelphia PA, US
Chelsea E. Amanatides - Manlius NY, US
Toen Castle - Orange, AU
David Edward Breen - Yardley PA, US
Paras Wadekar - Philadelphia PA, US
Prateek Goel - Philadelphia PA, US

International Classification:

D04B 37/02
D04B 37/06
G06F 30/20

Abstract:

A method for modeling textile structures using bicontinuous surfaces includes selecting a virtual scaffold of bicontinuous surfaces defining textile fabrication pathways to model spatial relationships between the pathways and yarns in a desired yarn pattern of a textile fabric design. The method further includes constructing a yarn pathway across the bicontinuous surfaces that form the virtual scaffold. The method further includes removing or releasing tension from the virtual scaffold, thereby allowing yarns to relax and determining a physical property of the textile fabric design.