James J Yorgason

US Patent:

6719165, Apr 13, 2004

Filed:

Aug 22, 2001

Appl. No.:

09/938327

Inventors:

Roger D. Wright - Logan UT
Marcus A. Darais - Brigham City UT
James A. Yorgason - South Ogden UT
Alan J. Loveless - Brigham City UT
Darrel G. Turner - Perry UT
David R. Nelson - Logan UT

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

B65D 9002

US Classification:

220586, 220 413, 220562

Abstract:

Pressure vessel end dome reinforcements are placed upon resin-impregnated fiber-wound pressure vessels to improve the strength-to-weight ratio of high performance pressure vessels, such as those that are used as rocket motors, gas generators, and the like. The reinforcement structures are assembled from gore pieces to form gore bodies over dome regions of the pressure vessels.

US Patent:

7316327, Jan 8, 2008

Filed:

Dec 8, 2003

Appl. No.:

10/731774

Inventors:

Roger D. Wright - Logan UT, US
Marcus A. Darais - Brigham City UT, US
James A. Yorgason - South Ogden UT, US
Alan J. Loveless - Brigham City UT, US
Darrel G. Turner - Perry UT, US
David R. Nelson - Logan UT, US

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

B65D 90/04

US Classification:

220586

Abstract:

Pressure vessel end dome reinforcements are placed upon resin-impregnated fiber-wound pressure vessels to improve the strength-to-weight ratio of high performance pressure vessels, such as those that are used as rocket motors, gas generators, and the like. The reinforcement structures are assembled from gore pieces to form gore bodies over dome regions of the pressure vessels.

US Patent:

52599019, Nov 9, 1993

Filed:

May 27, 1992

Appl. No.:

7/889445

Inventors:

Kevin Davis - Ogden UT
James A. Yorgason - Ogden UT

Assignee:

Thiokol Corporation - Ogden UT

International Classification:

B65H 8100

US Classification:

156154

Abstract:

A method for constructing an inflatable elastomer mandrel for use in fabricating composite articles is provided. The method comprises the steps of preparing a rigid, water soluble mandrel to the desired size and shape with a shaft extending therethrough; applying a mold releasing ply to the water soluble mandrel; applying a first layer of uncured elastomer to cover the water soluble mandrel; curing the first layer of elastomer to form a base layer for a work piece mandrel wherein the work piece mandrel initially comprises the cured layer of elastomer disposed about the water soluble mandrel; applying a second layer of uncured elastomer to cover the work piece mandrel; winding a fiber onto the work piece mandrel; applying a third layer of uncured elastomer to cover the winding of the fiber of the work piece mandrel; winding a second fiber onto the third layer of elastomer of the work piece mandrel; applying a fourth layer of uncured elastomer to cover the winding of the second fiber of the work piece mandrel; curing the layers of elastomer having been applied to the work piece mandrel; and dissolving the water soluble mandrel and removing the shaft from the work piece mandrel. The work piece mandrel may then be connected to tooling, inflated, and its surface machined to the desired contour and texture. A mandrel having a two-piece mandrel/sleeve configuration may be constructed wherein only the sleeve has hoop windings so that the mandrel is more readily collapsible.

US Patent:

53486030, Sep 20, 1994

Filed:

May 27, 1993

Appl. No.:

8/067849

Inventors:

James A. Yorgason - Ogden UT

Assignee:

Thiokol Corporation - Ogden UT

International Classification:

B31C 100

US Classification:

156191

Abstract:

A composite/metal hybrid rocket motor case made by rolling sheets of continuous, unidirectional fiber reinforcement pre-impregnated with an uncured, thermoset or thermoplastic resin about the mandrel using a tube rolling machine to form a liner having discontinuous layers of fiber reinforcement. The liner is inserted into a metal shell configured with elongated slots. A mold is placed around the shell with a bladder placed within the liner. The bladder within the mold is then pressurized to force the liner against the metal shell while the contents of the mold are heated. As the liner cures, it bonds to the shell. Fins, launch lugs, domes and bulkheads may be attached to the metal shell by known attachment methods.

US Patent:

52807061, Jan 25, 1994

Filed:

Jun 25, 1992

Appl. No.:

7/903852

Inventors:

James A. Yorgason - Ogden UT

Assignee:

Thiokol Corporation - Ogden UT

International Classification:

F02K 900

US Classification:

60255

Abstract:

A composite/metal hybrid rocket motor case made by rolling sheets of continuous, unidirectional fiber reinforcement pre-impregnated with an uncured, thermoset or thermoplastic resin about the mandrel using a tube rolling machine to form a liner having discontinuous layers of fiber reinforcement. The liner is inserted into a metal shell configured with elongated slots. A mold is placed around the shell with a bladder placed within the liner. The bladder within the mold is then pressurized to force the liner against the metal shell while the contents of the mold are heated. As the liner cures, it bonds to the shell. Fins, launch lugs, domes and bulkheads may be attached to the metal shell by known attachment methods.