Stephen E Petty

US Patent:

6649062, Nov 18, 2003

Filed:

Mar 25, 1997

Appl. No.:

08/824153

Inventors:

Stephen E. Petty - Dublin OH 43016

International Classification:

C02F 144

US Classification:

210649, 210644, 210640, 585818, 585819, 95 43, 95 45

Abstract:

A process for the separation of mixture components uses a supercritical fluid that is fresh to at least one side of a nonporous membrane after which the fluid is either recycled to the opposite side of the membrane or removed from the separation process. Fluids and membranes, including modified membranes, are provided to facilitate passage of one or more components of a mixture through the membrane while retarding passage of other components of the mixture. The process is useful for the separation of mixtures with similar components including axeotropic mixtures and pharmaceutical and biological products.

US Patent:

56365276, Jun 10, 1997

Filed:

Nov 15, 1995

Appl. No.:

8/558173

Inventors:

Richard N. Christensen - Columbus OH
Stephen E. Petty - Dublin OH

Assignee:

The Ohio State University Research Foundation - Columbus OH

International Classification:

F25B 1500

US Classification:

62476

Abstract:

Apparatus for mass transfer of gas and liquid flowing through passages therein has a vertical enclosure formed in a pair of sheet metal plates sealed together around their periphery and formed to have rows of horizontal passages communicating with columns of vertical passages in and adjacent to a vertical plane defined by flat contiguous areas of the plates between and around the passages. The inner surfaces of the passages have highly wettable areas to substantially maximize transfer of mass and heat. Each horizontal passage is continuous between the vertical passages with which it communicates. In the main portion of the apparatus, the axis of each vertical passage between one horizontal passage and the next lower one passes through the middle of a flat contiguous area between that next lower horizontal passage and the following still lower one and midway between the axes of the two vertical passages on each side of that flat area, so that fluid in the vertical passages divides approximately equally in its vertical flow between each horizontal passage and the next. Vertical passages connecting alternate ends of successive horizontal passages may be added, to provide also a serpentine path for fluid therein. Openings are provided to receive and expel, respectively, fluids that are to be, or have been, absorbed or desorbed.

US Patent:

61093394, Aug 29, 2000

Filed:

Nov 8, 1996

Appl. No.:

8/745301

Inventors:

Sherwood G. Talbert - Columbus OH
David A. Ball - Westerville OH
Jan B. Yates - Reynoldsburg OH
Stephen E. Petty - Dublin OH
Steve Grimes - Westerville OH

Assignee:

First Company, Inc. - Dallas TX

International Classification:

F25B 2900

US Classification:

165 481

Abstract:

A heating system uses a dynamic thermal stabilizer for receiving, mixing, holding and outputting a circulating heat exchange liquid in a fashion similar to the use of a flywheel in the mechanical arts. Liquid is returned to the dynamic thermal stabilizer from both an input heat exchange unit and an output heat exchange unit. A two pump system affords a simple tee fitting arrangement that provides room air heating by directly using hot liquid either from the dynamic thermal stabilizer or directly (and at higher temperature) from the input heat exchange unit itself to automatically achieve an additional boost of room heat using higher temperature liquid. The system can also provide initial short draws of domestic hot water from the dynamic thermal stabilizer alone or long draws of hot water by using the input heat exchange unit as a further source of heat input. The system includes a through-the-wall mounting system that simultaneously provides a source of combustion air and vents exhaust products, a spacer to maintain combustion air and exhaust pipes in spaced-apart relation, and a vent device for maintaining a cool, outer-vent surface. The system is combined with an air conditioning or heat pump system to provide a triple integrated appliance that provides room air heating and cooling and a source of domestic hot water.

US Patent:

55333621, Jul 9, 1996

Filed:

Aug 19, 1994

Appl. No.:

8/292843

Inventors:

F. Bert Cook - Columbus OH
Stephen E. Petty - Dublin OH
Howard C. Meacham - Upper Arlington OH
Richard N. Christensen - Columbus OH
Kevin R. McGahey - Fairfax OH

Assignee:

Columbia Gas of Ohio, Inc. - Columbus OH

International Classification:

F25B 1500

US Classification:

62476

Abstract:

A refrigeration and heating system in which an absorber (97), condenser (100) and recuperator are placed (107) in a single module (270) and are provided with tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat transfer device (400) is used to reduce the pressure drop in the circulating fluid.

US Patent:

55467601, Aug 20, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/487501

Inventors:

F. Bert Cook - Columbus OH
Stephen E. Petty - Dublin OH
Howard C. Meacham - Upper Arlington OH
Richard N. Christensen - Columbus OH
Kevin R. McGahey - Fairfax VA

Assignee:

Columbia Gas of Ohio, Inc. - Columbus OH

International Classification:

F25B 3300

US Classification:

62497

Abstract:

An absorption refrigeration and heating system has helical concentric coils for two generators (80 and 81) and recuperators (86 and 95) on a common axis (232) with a heating unit (84) at the center and allowing the hot combustion gases (245) to circulate in serpentine fashion through separate concentric chambers containing the coils. An absorber (97), condenser (100) and recuperator (107) are placed in a single module (270) and configured with a tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat-transfer device (400) is used to reduce the pressure drop in the circulating fluid.

US Patent:

49726790, Nov 27, 1990

Filed:

Feb 9, 1990

Appl. No.:

7/478274

Inventors:

Stephen E. Petty - Dublin OH
F. Bert Cook - Columbus OH

Assignee:

Columbia Gas Service Corporation - Wilmington DE

International Classification:

F25B 2700

US Classification:

622383

Abstract:

An integrated three-chamber absorption refrigeration and heat pump system with improved defrost capabilities having a solution pair including a material of unusable fluid stability at higher temperatures when manipulated in an apparatus and system to take advantage of its properties. Disclosed materials of a solution pair for operation as part of the system of this invention are ammonia as the refrigerant and sodium thiocyanate as the absorbent. A heat transfer sub-system is provided, for conveying a working fluid between the components, having multiple switchable valve means, including first, second, and third valve members selectively switchable to convey the working fluid from the cooling mode to the heating mode and vice versa, as well as to the defrost mode.

US Patent:

57690332, Jun 23, 1998

Filed:

Jan 22, 1996

Appl. No.:

8/589824

Inventors:

Stephen E. Petty - Dublin OH
Ronald G. Jones - Indianapolis IN

Assignee:

Columbia Gas of Ohio, Inc. - Columbus OH

International Classification:

F22B 500
H05B 102

US Classification:

122 131

Abstract:

Apparatus for heating and storing water comprises a tank 10 for holding a quantity of water 15 within a space 11 between studs 12 in a wall or like surface 13 of a room 14. An inlet conduit 16 conveys water into the tank 10, and an outlet conduit 17 conveys water out of it and on to another entity 36. A heater 32, spaced apart from the tank 10, receives water from a supply source at a lower temperature, heats it to a higher temperature, and communicates the heated water to the inlet conduit 16. Reinforcing structural members 25 and locator tabs 22 allow for economic construction and ease of installation. A typical tank 10 comprises a hollow parallelopiped having its front surface member 20 in the plane of the surface 13 of the room 14 and its back surface in a plane behind that of the surface 13.

US Patent:

RE347477, Oct 4, 1994

Filed:

Aug 31, 1992

Appl. No.:

7/938447

Inventors:

Stephen Petty - Columbus OH
Bert F. Cook - Columbus OH

Assignee:

Columbia Gas Service Corporation - Wilmington DE

International Classification:

F25B 2700

US Classification:

622383

Abstract:

An integrated three-chamber absorption refrigeration and heat pump system with improved defrost capabilities having a solution pair including a material of. [. unusable. ]. . Iadd. unusual. Iaddend. fluid stability at higher temperatures when manipulated in an apparatus and system to take advantage of its properties. Disclosed materials of a solution pair for operation as part of the system of this invention are ammonia as the refrigerant and sodium thiocyanate as the absorbent. A heat transfer sub-system is provided, for conveying a working fluid between the components, having multiple switchable valve means, including first, second, and third valve members selectively switchable to convey the working fluid from the cooling mode to the heating mode and vice versa, as well as to the defrost mode.