Raytheon Company

Aspen Aerogels, Inc.

Alberto E Schroth

Carl S Kirkconnell

Wilfried Krone-Schmidt

Kenneth D Price

Shannon Olga White

Jimmy Lee Clark

David M La Komski

Michael Doan

William E Croft

Stephen E Smith

Christopher M Shaffer

An article includes a piece of encapsulated insulation including an envelope having at least two vents therethrough, a particulate insulation within the envelope, and a porous filter overlying each vent of the envelope. The porous filter has a mesh size no larger that the minimum size of the particles. The article may further include a structure having a structure surface, and the piece of encapsulated insulation overlies and covers at least a portion of the structure surface.

Encapsulated and vented particulate thermal insulation

A pulse tube expander includes a regenerator, a pulse tube, a porous plug phase shifter, and a surge tank, in series gaseous communication with each other. The porous plug phase shifter is made of a porous material such as a sintered mass or a packed solid bed of distinct, free-flowing bodies. The porous plug phase shifter introduces a phase shift between the pressure wave and the mass flow rate in the pulse tube expander. The porous plug phase shifter is resistant to clogging due to contamination that may be present in the system.

Pulse tube expander having a porous plug phase shifter

Growing community of inventors

El Segundo, CA, United States of America

Alberto E Schroth