Secondary pulse tubes and regenerators for coupling to room temperature phase shifters in multistage pulse tube cryocoolers

US8950193B2 · kind B2 · utility

Assignee

• The United States of America, as Represented by the Secretary of Commerce National Institute of Standards and Technology · US

Inventors

• Ray Radebaugh · Louisville, US
• Isaac Garaway · Kfar Tavor, IL
• Peter E. Bradley · Lakewood, US

Key dates

• Filing date: Jan 24, 2011
• Grant date: Feb 10, 2015
• Expiry date: Jan 9, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B2309/1426
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Pulse tube refrigeration or cooling systems are described which utilize a secondary regenerator or a secondary pulse tube. Use of such a secondary regenerator or pulse tube enables a commercially available pressure oscillator to be incorporated in the cooling system. The commercially available oscillator can be operated at room temperature or approximately so.