Ronald E Weber

US Patent:

53598563, Nov 1, 1994

Filed:

Oct 7, 1993

Appl. No.:

8/133667

Inventors:

George D. Rhoades - LaGrange IL
Ronald C. Weber - Brookfield IL
Gerald E. Engdahl - Wheaton IL

Assignee:

Liquid Carbonic Corporation - Oak Brook IL

International Classification:

F25J 100

US Classification:

62 9

Abstract:

The present invention is directed to a process for increasing the methane content of liquid natural gas to provide an essentially pure liquid methane product. In the process, a liquid natural gas feed stream is introduced into a first heat exchanger in indirect heat exchange with a purified methane vapor stream so as to liquify the purified methane vapor stream and to provide a purified liquid methane product. The heat exchange results in increasing the temperature of the liquid natural gas feed stream to a temperature just below the dew point of the liquid natural gas feed stream so as to partially vaporize the liquid natural gas feed stream to provide a mixture of a major amount of substantially pure methane vapor and a minor amount of liquid containing methane and higher hydrocarbons. The mixture of vapor and liquid from the first heat exchanger is transferred to a low pressure separator to provide a liquid bottom fraction and a purified methane top vapor fraction. At least a portion of the liquid bottom fraction and all of the top vapor fraction are transferred to a second heat exchanger in indirect heat exchange with the vapor fraction after the vapor fraction has been processed to change the temperature and pressure of the vapor fraction.

US Patent:

60680644, May 30, 2000

Filed:

May 20, 1998

Appl. No.:

9/081992

Inventors:

Leonard A. Bettin - LaGrange Park IL
Daniel J. Boos - Aurora IL
Ronald M. Weber - Ingleside IL

Assignee:

Case Corporation - Racine WI

International Classification:

A01B 6322

US Classification:

172413

Abstract:

Agricultural implement to be conveyed by a self propelled vehicle includes a structural frame and a substructure moveable between a raised position and a lowered position. The substructure has at least one ground engaging tool supported thereon so as to engage the ground when the substructure is moved to the lowered position. A fluid circuit is provided to control engagement of the tool with the ground. The fluid circuit includes a first check valve having a first side connectable to a source of pressurized fluid flow and a second side connected to a fluid cylinder. The fluid cylinder is operated between a retracted position and an extended position to move the substructure between the raised position and the lowered position, respectively. A second check valve is provided having a first side connected to drain and a second side connected to the fluid cylinder. A sensor assembly opens the second check valve when pressurized fluid flow is received by the first side of the first check valve.

US Patent:

55113834, Apr 30, 1996

Filed:

Jul 18, 1994

Appl. No.:

8/276539

Inventors:

Don H. Coers - Naperville IL
Ronald C. Weber - Brookfield IL
Richard J. Kooy - Western Springs IL

Assignee:

Chicago Bridge & Iron Technical Services Company - Oak Bridge IL

International Classification:

F17C 704

US Classification:

62 481

Abstract:

A method and apparatus for limiting the level of cold liquid within a vessel by sensing the expansion of cold liquid due to ambient heat leak, and venting pressurized vapor from the vessel to reduce the rate of expansion of the cold liquid.