Ronald W Morris

US Patent:

8413452, Apr 9, 2013

Filed:

Nov 19, 2010

Appl. No.:

12/950080

Inventors:

Ronald N. Morris - Bedford MA, US
Bruce R. Andeen - Collierville TN, US
Allen J. Bartlett - New London NH, US

Assignee:

Brooks Automation, Inc. - Chelmsford MA

International Classification:

F25B 9/00

US Classification:

62 6, 62 511

Abstract:

A cryogenic refrigerator has a refrigeration cylinder and at least two displacers. Each displacer reciprocates in the refrigeration cylinder and moves refrigeration gas through the refrigeration cylinder. A regenerator cools the refrigeration gas, and gas control valves admit high pressure gas into the refrigeration cylinder and exhaust gas from the refrigeration cylinder. The refrigerator also has linear motors operatively connected to displacers, and the linear motors drive the displacers in reciprocating movement. A position sensor is provided to determine a parameter of the displacers during reciprocation. A controller is operatively connected to the linear motors to control the linear motors. The controller controls a parameter of the two displacers during reciprocation. The parameter can be stroke length, stroke speed, stroke phase or another parameter of the displacer for temperature control of the cryogenic refrigerator.

US Patent:

20110162391, Jul 7, 2011

Filed:

Dec 30, 2010

Appl. No.:

12/981806

Inventors:

William L. Johnson - Andover MA, US
Ronald N. Morris - Bedford MA, US
Robert P. Sullivan - Wilmington MA, US

International Classification:

B01D 8/00

US Classification:

62 555

Abstract:

Cryopump components are improved using thin layer heating elements for temperature control or to serve as heaters. These heating elements may be located and prevent pooling during regeneration. The temperature control may also be achieved through the use of ceramic heating elements. The ceramic heating elements may also include a second function of structural support within the cryopump. Temperature control may further be achieved via the radiation shield, where the radiation shield includes a clad sheeting or coating.

US Patent:

57351287, Apr 7, 1998

Filed:

Oct 11, 1996

Appl. No.:

8/729572

Inventors:

Yueli Zhang - Medfield MA
Ronald Norman Morris - North Falmouth MA
David Christopher Giusti - Mansfield MA

Assignee:

Helix Technology Corporation - Mansfield MA

International Classification:

F25B 900

US Classification:

62 6

Abstract:

A drive for driving a displacer in a cryogenic refrigerator includes a rotatable cam having a cam surface. The cam is rotatable about a pivot point with a cam follower contacting the cam surface. Rotational motion of the cam is converted into reciprocating motion of the cam follower. A displacer rod is coupled between the cam follower and the displacer for transferring the reciprocating motion of the cam follower to the displacer for driving the displacer.

US Patent:

47839686, Nov 15, 1988

Filed:

Aug 8, 1986

Appl. No.:

6/894777

Inventors:

Graham J. Higham - Ashland MA
Ronald N. Morris - Acton MA
Gerald R. Pruitt - Mendon MA

Assignee:

Helix Technology Corporation - Waltham MA

International Classification:

F25B 900

US Classification:

62 6

Abstract:

A two mass vibration isolator particularly suited to a linear reciprocating machine. Vibration into and out of the machine is attenuated by an isolator placed between the machine and its mounting frame. The isolator is an elastomer with a damping ratio of at least 0. 1 sandwiched between two retainers.

US Patent:

48605433, Aug 29, 1989

Filed:

Sep 1, 1988

Appl. No.:

7/239436

Inventors:

Graham J. Higham - Ashland MA
Ronald N. Morris - Acton MA
Gerald R. Pruitt - Mendon MA

Assignee:

Helix Technology Corporation - Waltham MA

International Classification:

F25B 900

US Classification:

62 6

Abstract:

A two mass vibration isolator particularly suited to a linear reciprocating machine. Vibration into and out of the machine is attenuated by an isolator placed between the machine and its mounting frame. The isolator is an elastomer with a damping ratio of at least 0. 1 sandwiched between two retainers.

US Patent:

49246755, May 15, 1990

Filed:

Jun 26, 1989

Appl. No.:

7/371510

Inventors:

Graham J. Higham - Ashland MA
Gerald R. Pruitt - Mendon MA
Ronald Morris - Acton MA
Frank Heger - Burnt Hills NY
James Livingstone - Framingham MA
David Tormey - Dorchester MA

Assignee:

Helix Technology Corporation - Waltham MA

International Classification:

F25B 900

US Classification:

62 6

Abstract:

A linear motor compressor within a cryogenic refrigerator wherein the compressor space, within which a gaseous fluid is alternately compressed and expanded, is formed by a stationary piston and a reciprocating armature that is concentric about the piston. The armature is supported along a clearance seal the stationary piston. An axial bore along the stationary piston conveys gaseous fluid from the compression space to a displacer within the cold finger of the cryogenic refrigerator. An isolator for reducing transimission into and out of the compressor comprising a dynamic absorber and flat springs mounted with a damping material between the compressor and a mounting frame. A sensor for detecting the position of the armature utilizes a target magnet whose magnetic flux lines are decoupled from the flux lines generated about the coil.

US Patent:

50366700, Aug 6, 1991

Filed:

Jan 18, 1990

Appl. No.:

7/466974

Inventors:

Ronald N. Morris - Newtonville MA

Assignee:

Helix Technology Corporation - Waltham MA

International Classification:

F25B 900

US Classification:

62 6

Abstract:

In a cryogenic refrigerator, a displacer 12 and its drive piston 28 are guided by a displacer guide 32 seated within an expander body 16. An expander cap 40 enclosing a spring volume 38 extends within the expander body 16 and abuts the displacer guide 32. An indium seal 50 is positioned in the chamfer at the intersection of the cap, body and guide.

US Patent:

20190063807, Feb 28, 2019

Filed:

Oct 29, 2018

Appl. No.:

16/173623

Inventors:

- Chelmsford MA, US
Maureen C. Buonpane - Mansfield MA, US
Ronald N. Morris - Bedford MA, US
Allen J. Bartlett - New London NH, US
Leonard A. Loranger - Medfield MA, US
Joseph Chopy, JR. - Cumberland RI, US
Robert P. Sullivan - Wilmington MA, US
John J. Varone - Seekonk MA, US
Paul E. Amundsen - Ipswich MA, US

International Classification:

F25B 49/02
A01N 63/02
G01N 33/50

Abstract:

A refrigerant management system controls the supply of refrigerant from two or more variable speed and fixed speed compressors to a plurality of cryogenic refrigerators. The system employs a plurality of sensors to monitor and regulate the overall refrigerant supply to deliver an appropriate refrigerant supply to each of the cryogenic refrigerators. The amount of refrigerant to supply is based on an aggregate demand for refrigerant from the plurality of cryogenic refrigerators and a refrigerant correction metric. An appropriate supply of refrigerant is distributed to each cryogenic refrigerator by adjusting the speed of the variable speed compressors or, alternatively, selectively turning the compressors on or off. The speed of the variable speed compressors is adjusted by determining an amount of refrigerant to supply to the plurality of cryogenic refrigerators. If the aggregate demand for refrigerant exceeds the capacity of the compressors, then the speed of a refrigerator within the plurality of refrigerators is adjusted.