Title: Plasma deposited rider rings for hot displacer

Abstract: A hot cylinder for a cryogenic refrigerator having two plasma spray deposited rider rings of a corrosion and abrasion resistant material provided in the rider ring grooves, wherein the rider rings are machined to the desired diameter and width after deposition. The rider rings have gas flow flats machined on their outer surface.

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Inventors: Kroebig, Helmut L. (Rolling Hills, CA, US)

Application Number: 556988
Filing Date: 1975-03-10
Publication_date: 1976-09-21
Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC)
Primary Class(es): 62/6 29/527.2, 29/888.074, 427/451, 427/456
Other Classes:
US Patent Ref:

3080643	Mar, 1963	Hanink et al.	29/527.
3133341	May, 1964	Marien	29/156.
3205668	Sep, 1965	Gifford	62/6.
3364675	Jan, 1968	Dorer	62/6.
3620029	Nov, 1971	Longsworth	62/6.
3717004	Feb, 1973	O'Neil	62/6.
3802211	Apr, 1974	Bamberg et al.	62/6.
3938814	Feb, 1976	Cromwell	427/34.

Other Refs:
Primary Examiner: King, Lloyd L.
Assistant Examiner:
Attorney: Rusz; Joseph E., Killoren; Richard J.