Praxair Technology, Inc.

Bayram Arman

Dante Patrick Bonaquist

Arun Acharya

John Henri Royal

Joseph Alfred Weber

Kenneth Kai Wong

Walter Joseph Olszewski

James Joseph Volk

Mark Edward Vincett

Tu Cam Nguyen

Henry Edward Howard

Minish Mahendra Shah

Christian Friedrich Gottzmann

Mohammad Abdul-Aziz Rashad

Richard C Fitzgerald

Raymond Francis Drnevich

John Fredric Billingham

Nancy Jean Lynch

John Frederic Billingham

Todd Alan Skare

Raymond P Roberge

Jalal Hunain Zia

Al-Khalique Shariff Hamilton

Steve A Richards

Neil Mark Prosser

Michael James Lockett

James Smolarek

Jeffert John Nowobilski

Gary Dee Lang

Thomas John Bergman, Jr

Herbert Raymond Schaub

Richard A Novak

M Mushtaq Ahmed

Richard A Victor

John H Ziemer

Norman Henry White

Neno T Nenov

James B Wulf

Arthur Edward Holmer

Vijayaraghavan Srinivasan

Brian Michael Meredith

M Abdul-Aziz Rashad

Mushtaq M Ahmed

Joseph William Hass, Jr

Michael Anthony Marino

Christian Fredrich Gottzmann

Mohannad Abdul-Aziz Rashad

Ravi Fulchand Pahade

Vincent Kotsubo

Vance Goble, Jr

William Martin Greene, Iii

John Henry Royal

A superconducting magnet system wherein a cryocooler provides refrigeration to a cryogenic shield for the superconducting magnet and a heat pipe extends from the cryogenic shield to a cryogen vessel for the provision of supplementary refrigeration.

Superconducting magnet system with supplementary heat pipe refrigeration

A method for operating a cryocooler which provides opportunity for timely intervention prior to failure thus enhancing the reliability of the provision of the refrigeration wherein temperature trending of at least one cryocooler component or the refrigeration load is monitored and used to calculate a service time.

Method for operating a cryocooler using temperature trending monitoring

A cryocooler system having at least one flow straightener which has a system of grooves on its perforated surface for enhancing gas flow uniformity through the system wherein pulsing gas which does not initially pass through the flow straightener through a perforation flows along the surface of the flow straightener within a groove prior to passing through a perforation and is effectively redistributed across the surface of the flow straightener and thus the cross section of the regenerator or thermal buffer tube.

Cryocooler with grooved flow straightener

A method for operating a cryocooler wherein some cryocooler working gas is diverted from the pressure wave pathway before passing to the cold portion of the cryocooler, passed to a getter for adsorptive cleaning of contaminants, and returned to the pressure wave pathway at a warm portion of the pressure wave pathway.

Cryocooler operation with getter matrix

A resonant linear motor driven cryocooler system, particularly suited for providing refrigeration to a magnetic resonance imaging system, wherein vibrations from the resonant linear motor and noise from pulsed gas are isolated from the cryocooler by work transfer piping comprising connecting tubing and preferably a dashpot, and wherein the connecting tubing has a volume which exceeds the internal stroke volume of the resonant linear motor.

Resonant linear motor driven cryocooler system

A pulse tube system for generating refrigeration for uses such as in magnetic resonance imaging systems wherein an oil-free compressor operating at a higher frequency generates pulsing gas which undergoes a frequency reduction and drives the pulse tube system at a more efficient lower frequency.

Low frequency pulse tube system with oil-free drive

A method for operating a cryocooler which provides opportunity for timely intervention prior to failure thus enhancing the reliability of the provision of the refrigeration wherein contaminant concentration downstream of a compressor but upstream of the cryocooler is monitored and the time rate of change of the contaminant concentration is used to calculate a service time.

Method for operating a cryocooler using on line contaminant monitoring

A refrigeration generation system wherein a frequency modulating mechanical resonator is positioned between a pressure wave generator and a cryocooler and serves to reduce the frequency of the oscillating gas emanating from the pressure wave generator so that it more closely comports with a more efficient operating frequency of the cryocooler.

Cryocooler system with frequency modulating mechanical resonator

Multicomponent refrigerant fluids for generating refrigeration, especially over a wide temperature range including cryogenic temperatures, which are advantageous over conventional refrigerant fluids especially for certain applications, and which are non-toxic, non-flammable and low or non-ozone-depleting and preferably are maintained in variable load form through compression, cooling, expansion and warming steps in a refrigeration cycle.

Multicomponent refrigerant fluids for low and cryogenic temperatures

A system for providing industrial gas to a use point in relatively small quantities that would otherwise require the use of high pressure gas cylinders, wherein industrial gas is generated from a feed, liquefied using refrigeration generated by a refrigeration system, and stored in a storage vessel prior to provision to the use point. The preferred refrigeration system is a pulse tube system powered by gas associated with the industrial gas generation system.

Cryogenic system for providing industrial gas to a use point

A pulse tube refrigeration system wherein the pulse tube working gas is cooled to a defined first stage temperature and is brought to a defined second stage temperature by operation of a regenerator and pulse tube, which are in flow communication through a cold heat exchanger, prior to providing refrigeration to a high temperature superconductor.

Multistage pulse tube refrigeration system for high temperature super conductivity

A method for refrigerating a high temperature superconducting device to maintain superconducting operating conditions wherein a first heat transfer means such as a first heat transfer fluid is cooled to a temperature greater than the temperature of saturated liquid nitrogen and is used for ambient heat intercept while a second heat transfer means such as a second heat transfer fluid is cooled to a temperature within the high temperature superconductivity temperature operating range to maintain superconducting operating conditions.

Multilevel refrigeration for high temperature superconductivity

A pulse tube refrigeration system, having a pulse generator, a regenerator and a pulse tube, comprising a work transfer tube interposed between the pulse generator and the regenerator wherein the work transfer tube has a cross section at the end proximate the pulse generator which differs from the cross sectional area proximate the regenerator, enabling a reduction in heat transfer due to streaming within the work transfer tube.

Pulse tube refrigeration system with tapered work transfer tube

A method for operating a thermoacoustic engine which produces acoustic energy which may be used to generate refrigeration wherein energy delivery fluid from a hot energy source, which provides heat to the thermoacoustic engine, is used to provide heat to a first heat sink such as a Kalina cycle and then at a lower temperature to a second heat sink.

Thermoacoustic cogeneration system

A method for providing refrigeration to a refrigeration load which enables the use of environmentally friendly refrigerants with lower power consumption than with conventional refrigerants wherein the low side pressure of the circuit exceeds the critical pressure of the refrigerant fluid and the refrigerant fluid is compressed to a higher supercritical pressure prior to expansion.

Supercritical refrigeration system

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Grand Island, NY, United States of America

Bayram Arman