1
Sibley C Burnett, John R Purcell, M Harlan Horner: Magnet system and method of its manufacture. GA Technologies, Fitch Even Tabin & Flannery, September 15, 1987: US04694269 (19 worldwide citation)

A magnet system for providing a localized, substantially homogeneous magnetic field for use in nuclear magnetic resonance imaging. The magnet system includes a vacuum vessel defining a bore for receiving the subject of the imaging. It further includes a cryogenic containment vessel supported within ...


2
Sibley C Burnett, John R Purcell, Bruce C Breneman, Raymond E Sarwinski: MRI Magnet system with permanently installed power leads. General Atomics, Fitch Even Tabin & Flannery, June 20, 1989: US04841268 (16 worldwide citation)

A magnet system, having permanently installed power leads, for providing a magnetic field. The system includes a vacuum vessel and a cryogenic containment vessel supported within the vacuum vessel. The containment vessel holds a main coil formed of superconductive wire, along with a quantity of liqu ...


3
Bruce C Breneman, John R Purcell, Sibley C Burnett: MRI magnet system having shield and method of manufacture. GA Technologies, Fitch Even Tabin & Flannery, May 10, 1988: US04743880 (15 worldwide citation)

A magnet system for providing a localized, substantially homogeneous field for use in medical magnetic resonance imaging and its incorporation into a method of siting. The magnet system includes a vacuum vessel defining a bore for receiving the subject of the imaging and having a first end and a sec ...


4
John R Purcell, Bruce C Breneman, Sibley C Burnett: MRI magnet system with vessel having composite first wall. General Atomics, Fitch Even Tabin & Flannery, August 30, 1988: US04768008 (13 worldwide citation)

A magnet system for use in magnetic resonance imaging. The system includes a vacuum vessel having a first wall assembly defining a bore for receiving the subject of the imaging and a pair of spaced metallic end plates welded to the ends of the first wall assembly. The system further includes a cryog ...


5
Raymond E Sarwinski, John R Purcell, Judson W Parker, Sibley C Burnett: Cryogenic magnet systems. GA Technologies, Fitch Even Tabin & Flannery, July 21, 1987: US04680936 (11 worldwide citation)

According to the present invention, improved cryogenic magnet systems for use in MRI devices are provided. These systems comprise an electromagnet immersed in a first tank containing a first liquefied gas. The first tank is located in an evacuated container that is evacuated to a high vacuum. A refr ...


6
James G Pierce, Charles B Hood, Sibley C Burnett, John R Purcell: Refrigeration of superconducting magnet systems. PHPK Technologies, C Michael Gegenheimer, December 16, 1997: US05697220 (5 worldwide citation)

A refrigeration system includes a dewar and a refrigerator/liquefier which meets the variable demands of a superconducting magnet within the dewar. The system is sized to meet average loads over a defined duty cycle, and is variably operable to meed demands. In the preferred embodiment, a first supp ...


7
John R Purcell, Sibley C Burnett, Lewis R Creedon: Containment vessel for use with a pulsed magnet system and method of manufacturing same. Advanced Cryo Magnetics, Fitch Even Tabin & Flannery, September 15, 1992: US05148137 (4 worldwide citation)

A cryogenic containment vessel for use with a pulsed superconducting magnet system includes a superconducting coil positioned within the cryogenic containment vessel for providing a magnetic field. The containment vessel includes a relatively thin metallic inner tube for holding liquid helium and th ...


8
John R Purcell, Sibley C Burnett, Lewis R Creedon: Pulsed magnet system. Advanced Cryo Magnetics, Fitch Even Tabin & Flannery, May 28, 1991: US05019247 (4 worldwide citation)

A pulsed superconducting magnet system includes a vacuum vessel and a cryogenic containment vessel assembly disposed within the vacuum vessel. A superconducting coil is positioned within the cryogenic containment vessel assembly for providing a magnetic field. The vessel assembly includes a helium v ...


9
James G Pierce, Charles B Hood, Sibley C Burnett, John R Purcell: Refrigeration of superconducting magnet systems. C Michael Gegenheimer, March 5, 1996: US05495718 (3 worldwide citation)

A refrigeration system includes a dewar and a refrigerator/liquefier which meets the variable demands of a superconducting magnet within the dewar. The system is sized to meet average loads over a defined duty cycle, and is variably operable to meed demands. In the preferred embodiment, a first supp ...


10
John R Purcell, Sibley C Burnett, Lewis R Creedon: Method of manufacturing a containment vessel for use with a pulsed magnet system. Advanced Cryo Magnetics, Fitch Even Tabin & Flannery, August 24, 1993: US05237738 (1 worldwide citation)

A method of manufacturing a helium containment vessel for use with a pulsed superconducting magnetic separator system is described. The containment vessel includes a superconducting coil positioned within the cryogenic containment vessel for providing a magnetic field. The containment vessel include ...