The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 2004
Filed:
Apr. 20, 2001
Applicant:
Inventor:
Ralph C. Longsworth, Allentown, PA (US);
Assignee:
IGC-APD Cryogenics, Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25B 9/00 ; F28D 1/700 ;
U.S. Cl.
CPC ...
F25B 9/00 ; F28D 1/700 ;
Abstract
Several layers of fine mesh screen are diffusion bonded together to form a rigid disc or plate that is self supporting and is a flow smoother at the ends of a pulse tube expander. Layers range from fine screens on the surface facing the pulse tube to coarser screens that provide structural support without significantly adding to pressure drop across the screen assembly. The flow smoother is typically used in series with a heat exchanger at the warm end that rejects heat to ambient from the gas of the pulse tube and a heat exchanger at the cold end that receives heat from the load being cooled.