Donald R Spriggs

US Patent:

20100266851, Oct 21, 2010

Filed:

Apr 17, 2009

Appl. No.:

12/386508

Inventors:

Donald R. Spriggs - Overland Park KS, US

International Classification:

B32B 15/08
B05D 3/00
B05D 5/00
C08K 3/10
C08K 3/14

US Classification:

428418, 4273722, 427355, 524407, 524406

Abstract:

Sealing a thermal spray coating with an extensively diluted sealant, such as a thermosetting epoxy resin, allows the sealant to more effectively protect the coating against leakage, wear and corrosion. The dilution of the sealant is believed to enhance penetration of the sealant into the coating. Such sealed coatings are useful in oilfield applications.

US Patent:

52622207, Nov 16, 1993

Filed:

Jun 18, 1991

Appl. No.:

7/716957

Inventors:

Donald R. Spriggs - San Diego CA
William G. Taft - Cardiff CA
Christian W. Loedel - San Diego CA

Assignee:

Chem-Tronics, Inc. - El Cajon CA

International Classification:

B32B 328
B64B 114

US Classification:

428156

Abstract:

A high strength panel-like structure having a high strength to weight ratio. The structure comprises two integrally formed panel sections, each panel section comprising an outer sheet portion and inwardly extending ribs that are formed integrally with the related sheet portions, and having inner bonding surfaces spaced from their respective sheet portions. The two panel sections are formed into a unitary structure by bonding the two sections at the bonding surfaces of the ribs. Thus, the bonding area of the panel structure is at the neutral axis of the structure. Desirably inner bonding surfaces of the ribs have a width dimension greater than a width dimension of the ribs.

US Patent:

49785850, Dec 18, 1990

Filed:

Jan 2, 1990

Appl. No.:

7/459894

Inventors:

Ann M. Ritter - Schenectady NY
Paul A. Siemers - Clifton Park NY
Donald R. Spriggs - San Diego CA

Assignee:

General Electric Company - Schenectady NY

International Classification:

B05D 110
B32B 1514
C22C 3200
B22D 2300

US Classification:

428614

Abstract:

A method of altering the crystal form of an alloy is disclosed. To accomplish this change in crystal form, the concentrations of the more volatile constituents of the alloy are reduced and the concentration of the less volatile constituents is increased on a relative basis. The process may be carried out in forming a reinforced structure. For this purpose, an improved reinforced matrix and a method of forming it are taught. The reinforcement may be silicon carbide filaments or other reinforcing filaments. The matrix is a titanium 1421 alloy nominally containing 14 weight percent of aluminum and 21 weight percent of niobium. The matrix is formed by plasma-spray forming a powder of the alloy to impart to the alloy particles a superheat during the plasma-spraying as the particles traverse the plasma plume. As a result of the superheat, the alloy is changed in its composition to reduce the aluminum concentration and to increase the niobium and titanium concentrations on a relative basis. As a result of the change in composition the crystal form of the spray deposited matrix is altered to increase the amount of the beta-phase crystal form of the alloy which is present and to decrease the amount of the alpha-2 crystal form of the alloy which is present.

US Patent:

52537943, Oct 19, 1993

Filed:

Nov 9, 1992

Appl. No.:

7/973512

Inventors:

Paul A. Siemers - Clifton Park NY
Stephen F. Rutkowski - Duanesburg NY
Joseph J. Jackson - Topsfield CA
Donald R. Spriggs - San Diego CA

Assignee:

General Electric Company - Schenectady NY

International Classification:

B23K 3102

US Classification:

228121

Abstract:

A method for forming a ring structure having a high volume fraction of a filament reinforcement within a metal matrix is disclosed. The ring structure is formed by consolidating a set of nested rings each of which has a high volume fraction of the filamentary reinforcement therein. The nesting is done to provide a clearance between the rings of the nest of about 2 or 3 mils. The nested rings are enclosed within a HIPing can and the structure is HIPed at about 15 ksi and 1000. degree. C. for over an hour. A single superring structure results from the HIPing.

US Patent:

53126955, May 17, 1994

Filed:

Jul 2, 1990

Appl. No.:

7/546961

Inventors:

Paul A. Siemers - Clifton Park NY
Stephen F. Rutkowski - Duanesburg NY
Joseph J. Jackson - Topsfield MA
Donald R. Spriggs - San Diego CA

Assignee:

General Electric Company - Schenectady NY

International Classification:

B21D 3900

US Classification:

428614

Abstract:

A method for forming a ring structure having a high volume fraction of a filament reinforcement within a metal matrix is disclosed. The ring structure is formed by consolidating a set of nested rings each of which has a high volume fraction of the filamentary reinforcement therein. The nesting is done to provide a clearance between the rings of the nest of about 2 or 3 mils. The nested rings are enclosed within a HIPing can and the structure is HIPed at about 15 ksi and 1000. degree. C. for over an hour. A single superring structure results from the HIPing.