William W Feng, Age 86948 Kelley Ct, Lafayette, CA 94549

7308387, Dec 11, 2007

Feb 19, 2004

10/783562

William W. Feng - Lafayette CA, US
Paul A. DuBois - Offenbach, DE
John O. Hallquist - Livermore CA, US

Livermore Software Technology Corp. - Livermore CA

G06F 17/50
G06G 7/48

703 1, 703 7

A method and system to numerically simulating structural responses of a highly compressible material such as foam in finite element analysis is disclosed. According to one aspect of the simulation, a new improved method for calculating structural responses is derived using the following assumptions: uniaxial loading and isotropic material. As a result of the new method, Ogden polynomial stress function f(λ) is replaced by a tabulated function depending upon only a set of stress-strain curves obtained via uniaxial tension and compression tests. The method is implemented in a finite element analysis software product.

7472602, Jan 6, 2009

May 8, 2007

11/746039

William W Feng - Lafayette CA, US
John O. Hallquist - Livermore CA, US

Livermore Software Technology Corporation - Livermore CA

G01N 3/10
G01D 1/16

73789, 73150 A, 73840, 73794, 73 37

Systems and methods for determining material properties of elastomers for the Mullins effect are described. In one aspect of the present invention, material properties of an elastomer membrane specimen are obtained using a system comprising a bi-axial test device, a pump, a fluid reservoir, a linear variable differential transformer, a pressure transducer and a computer. The bi-axial test device comprises a top plate and a bottom plate. The top plate has a circular hole configured to allow the specimen to be expanded up by pressures of the inflating fluids. The circular hole is so dimensioned that the specimen can be expanded with a substantially low pressure. The bottom plate is a solid plate configured with a fluid intake at one side and a fluid outlet at the other end. The fluid intake is connected to the fluid reservoir. Fluids stored in the fluid reservoir are pumped into the bi-axial test device by the pump.

7533577, May 19, 2009

Feb 3, 2008

12/025036

William W Feng - Lafayette CA, US
John O. Hallquist - Livermore CA, US

Livermore Software Technology Corporation - Livermore CA

G01N 3/10
G01D 1/16

73789, 73150 A, 73840, 73794, 73 37

Systems and methods for determining material properties of elastomers for the Mullins effect are described. In one aspect of the present invention, material properties of an elastomer membrane specimen are obtained using a system comprising a bi-axial test device, a pump, a fluid reservoir, a linear variable differential transformer, a pressure transducer and a computer. The bi-axial test device comprises a top plate and a bottom plate. The top plate has an elliptical shape hole configured to allow the specimen to be expanded up by pressures of the inflating fluids. The hole is so dimensioned that the specimen can be expanded with a relatively low pressure. The bottom plate is a solid plate configured with a fluid intake at one side and a fluid outlet at the other end. The fluid intake is connected to the fluid reservoir. Fluids stored in the fluid reservoir are pumped into the bi-axial test device by the pump.

8296109, Oct 23, 2012

Apr 20, 2009

12/426913

William W. Feng - Lafayette CA, US
John O. Hallquist - Livermore CA, US

Livermore Software Technology Corporation - Livermore CA

G06G 7/48

703 7

Methods and systems for enabling simulation of material aging effect of chrono-rheological materials in computer aided engineering (CAE) analysis are disclosed. According to one aspect, a set of material property tests is conducted for a chrono-rheological material of interest. Each test obtains a series of material properties such as relaxation test data at different age. The relaxation test data are measured by maintaining a specimen of the chrono-rheological material at a predetermined strain. A set of first and second time-dependent material aging effect parameters is determined by shifting and matching the series of relaxation test data between each pair of the tests. The set of first and second time-dependent material aging effect parameters in conjunction with a CAE analysis application module with a chrono-rheological material constitutive equation configured therein are then used for simulating material aging effect by performing a CAE analysis of an engineering structure containing at least in part the chrono-rheological material.

5776103, Jul 7, 1998

Oct 11, 1995

8/541184

Marshall S. Kriesel - St. Paul MN
Farhad Kazemzadeh - Bloomington MN
Matthew B. Kriesel - St. Paul MN
William W. Feng - Lafayette CA
Steve C. Barber - Shorewood MN
William J. Kluck - Hudson WI

Science Incorporated - Bloomington MN

A61M 3700

604132

An apparatus for accurately infusing fluids into a patient at specific rates over an extended period of time. The apparatus is of a low profile, laminate or layered construction having a stored energy source in the form of a distendable membrane, which, in cooperation with the base of the apparatus, defines one or more fluid reservoirs, each having a fluid inlet and a fluid outlet. The apparatus further includes, a novel, conformable ullage made of yieldable materials which uniquely conforms to the shape of the elastomeric membrane as the membrane returns to its less distended configuration. This arrangement will satisfy even the most stringent medicament delivery tolerance requirements and will elegantly overcome the limitations of materials selection encountered in devices embodying solely a rigid ullage construction. Additionally, in one form of the invention, the infusion cannula of the apparatus is connected to the base of the apparatus in a novel manner which permits expeditious subdermal delivery of liquid medicaments to the patient via a cannula which extends generally perpendicularly from the base.

6007518, Dec 28, 1999

Sep 8, 1998

9/149387

Marshall S. Kriesel - St. Paul MN
Farhad Kazemzadeh - Bloomington MN
Matthew B Kriesel - St. Paul MN
William W Feng - Lafayette CA

Science Incorporated - Bloomington MN

A61M 3700

604131

A fluid delivery apparatus which embodies a stored energy source such as distendable elastomeric membrane which cooperates with a base and a conformable ullage to define a fluid reservoir and one which includes a unique fill assembly for use in controllably filling the fluid reservoir. The novel fill assembly of the invention enables the fluid reservoir of the fluid delivery portion of the apparatus to be aseptically filled in the field with a wide variety of selected medicinal fluids.

6236624, May 22, 2001

May 21, 1999

9/316767

Marshall S. Kriesel - Saint Paul MN
William W. Feng - Lafayette CA
Farhad Kazemzadeh - Bloomington MN

Science Incorporated - Bloomington MN

G09F 100

368 65

A fluid operated timing device in which the timing interval is determined by the rate at which the fluid flows through a precisely configured rate control frit upon being forced through the frit by an energy source in the form of a compressible elastomeric member.

5716343, Feb 10, 1998

Oct 11, 1995

8/540914

Marshall S. Kriesel - St. Paul MN
Farhad Kazemzadeh - Bloomington MN
Matthew B. Kriesel - St. Paul MN
William W. Feng - Lafayette CA
Steve C. Barber - Shorewood MN
William J. Kluck - Hudson WI

Science Incorporated - Bloomington MN

A61M 3700

604132

An apparatus for accurately infusing fluids into a patient at specific rates over an extended period of time. The apparatus is of a low profile, laminate construction having a stored energy source in the form of a distendable membrane, which in cooperation with the base of the apparatus defines one or more fluid reservoirs each having a fluid inlet and a fluid outlet. The apparatus further includes a novel, conformable ullage made of formable materials. The conformable ullage uniquely conforms to the shape of elastomeric membrane as the membrane returns to its less distend configuration and in so doing can move between a central chamber and a toroidal chamber formed in the cover of the apparatus. This arrangement will satisfy even the most stringent medicament delivery tolerance requirements and will elegantly overcome the limitations of materials selection encountered in devices embodying solely rigid ullage construction. Additionally, the infusion cannula of the apparatus is connected to the base in a novel manner which permits expeditious subdermal delivery to the patient via a cannula which extends generally perpendicularly relative to the base.