Donald E Shaffer

US Patent:

20010009832, Jul 26, 2001

Filed:

Nov 30, 2000

Appl. No.:

09/727010

Inventors:

Donald Shaffer - Wilmington DE, US
Hamid Ghorashi - Midlothian VA, US

International Classification:

D03D015/00
D03D013/00

US Classification:

442/181000, 442/203000, 442/208000, 442/209000

Abstract:

The present invention provides a woven flame resistant fabric comprising dissimilar warp and fill yarns, the warp yarns comprise staple or filament fibers and have a Limiting Oxygen Index of at least 27, and the fill yarns comprise natural fibers and wherein the ratio of warp to fill yarn ends in the fabric is at least 1.0.

US Patent:

54477875, Sep 5, 1995

Filed:

Jan 30, 1995

Appl. No.:

8/380489

Inventors:

Donald E. Shaffer - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B32B 508
B32B 2512
D03D 100
D03D 1500

US Classification:

428229

Abstract:

A reinforced fabric composed of a background fabric and a reinforcing grid that is joined to the background fabric so that the grid reinforced fabric is at least 20% stronger than a fabric into which reinforcing yarns of the same type and weight percent as that of the grid have been integrally woven.

US Patent:

54685370, Nov 21, 1995

Filed:

Sep 30, 1993

Appl. No.:

8/128432

Inventors:

Gary G. Brown - Wilmington DE
Hamid M. Ghorashi - Midlothian VA
Donald E. Shaffer - Wilmington DE

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B32B 306
B32B 502
D03D 300
B27N 900

US Classification:

428101

Abstract:

Heat flow through a protective garment is reduced if the shell is a woven fabric extends laterally and expands away from the wearer upon exposure to a high heat flux.

US Patent:

47365781, Apr 12, 1988

Filed:

Apr 23, 1985

Appl. No.:

6/726385

Inventors:

Donald E. Shaffer - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

D02G 334
D02G 336
D02J 106

US Classification:

57 6

Abstract:

A method for forming a slub yarn uses conventional false-twist texturing apparatus in combination with one or more air jets to impart striations and/or neps and slubs to continuous filament yarns. Three process configurations are disclosed; each configuration uses one air jet through which yarn passes and which directs turbulent air in a direction opposite to the direction of travel of the yarn.

US Patent:

46717447, Jun 9, 1987

Filed:

Feb 13, 1985

Appl. No.:

6/701450

Inventors:

Donald E. Shaffer - North East MD
Stanley A. Racik - Newark DE
Peter H. Lucas - Newark DE
Calvin W. Vriesen - Newark DE

Assignee:

Morton Thiokol Inc. - Chicago IL

International Classification:

F04B 1700
F04B 3500
F02C 326

US Classification:

417381

Abstract:

An integral turbofan/solid propellant gas generator air induction system features in a single device a solid propellant gas generator and a turbofan which are operative, when activated, even after long periods of storage, to take ambient air and compress it to the pressures required in emergency situations for preventing loss of life and valuable equipment, for example, the inflation of an aircraft slide.

US Patent:

39825310, Sep 28, 1976

Filed:

Apr 30, 1975

Appl. No.:

5/572980

Inventors:

Donald E. Shaffer - Newark DE

Assignee:

Thiokol Corporation - Newtown PA

International Classification:

A61H 100

US Classification:

128 24R

Abstract:

A gas generating inflation device utilizing combustible propellant cartridges is provided for a pneumatic orthosis used by persons needing support of the legs or lower body and legs. Since most such persons use two canes for additional support while standing or walking, the inflation device is conveniently located in one of the canes, with the other cane used as a supply container for additional cartridges. The gas generator is loaded with a propellant cartridge and gas generation is initiated at the will of the orthosis wearer, the generated gas then flowing through filters in the cane in which the generator is located and thence into the pneumatic orthosis to inflate it.

US Patent:

54827639, Jan 9, 1996

Filed:

Jan 30, 1995

Appl. No.:

8/380531

Inventors:

Donald E. Shaffer - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B32B 508
B32B 2510
D03D 100
D03D 1500

US Classification:

428229

Abstract:

A light weight tear resistant fabric having a background fabric and reinforcing yarns selected such that the tensile strength of the reinforcing yarn is about two times that of the yarns of the background fabric and the elongation of the reinforcing yarns is at least two times that of the background fabric is described. The resulting reinforced fabric has at least 50% greater tear resistance than the background fabric as measured by the Elmendorf test.