Mark Alan Key

US Patent:

20130086937, Apr 11, 2013

Filed:

Oct 7, 2011

Appl. No.:

13/268224

Inventors:

Luther D. Albertson - Sellersburg IN, US
Mark B. Key - Greenwood IN, US

International Classification:

F25B 41/00
F25B 1/00
B23P 15/26

US Classification:

62468, 29890035

Abstract:

An oil circulation system for a refrigeration chiller including a pump coupled to an atomizing spray nozzle located near the compressor suction inlet spraying a fine mist of oily liquid from the evaporator to be aspirated by the compressor.

US Patent:

57299919, Mar 24, 1998

Filed:

May 29, 1996

Appl. No.:

8/654619

Inventors:

Luther D. Albertson - New Albany IN
Walter R. Key - Indianapolis IN
Mark B. Key - Indianapolis IN

International Classification:

F25B 4500

US Classification:

62149

Abstract:

A pressure relief system for a mechanical refrigeration system. In one embodiment the pressure relief system having a pair of pressure relief valves connected in series to a pressure vessel that contains refrigerant. The pressure relief system allowing the changing of the primary pressure relief valve while the vessel is pressurized without the loss of overpressure protection.

US Patent:

55773893, Nov 26, 1996

Filed:

Aug 11, 1994

Appl. No.:

8/288814

Inventors:

Luther D. Albertson - New Albany IN
Walter R. Key - Indianapolis IN
Mark B. Key - Greenwood IN

International Classification:

F16K 1714
F25B 4304

US Classification:

62115

Abstract:

The present invention relates to a rupture disk fragment collection trap for minimizing the loss of refrigerant from a mechanical refrigeration system. A mechanical refrigeration system generally includes a storage vessel for the storage of a refrigerant, which to comply with applicable safety codes requires a pressure relief unit for venting an over-pressurized storage vessel. The pressure relief unit includes a fragmentary carbon rupture disk that provides a mechanical seal to contain the refrigerant, prevent the infiltration of contaminants into the refrigeration system, and rupture to relieve the over-pressurized state of the storage vessel. A mechanical re-seating type pressure relief valve is positioned downstream from the carbon rupture disk to control the flow of refrigerant into the atmosphere. The valve and the rupture disk are connected in fluid communication by a sealed passageway containing a rupture disk fragment collection trap. The trap prevents fragments in the passageway following rupture disk breakage from interfering with the operation of the pressure relief valve.

US Patent:

56735634, Oct 7, 1997

Filed:

Jul 8, 1996

Appl. No.:

8/676555

Inventors:

Luther D. Albertson - New Albany IN
Walter R. Key - Indianapolis IN
Mark B. Key - Indianapolis IN

International Classification:

F25D 2900

US Classification:

62 56

Abstract:

The present invention relates to a pressure relief system that utilizes fluid released from a pressure relief valve to activate a sensor. In one form of the present invention a relatively confined passageway is in fluid communication with a reseatable pressure relief valve for protecting a condenser from overpressurization. The pressure relief valve allowing the release of fluid into the passageway at pressures below the overpressure threshold protection value of the valve. The released fluid is accumulated in the passageway and sensed by a sensor. Further, upon the pressure in the relatively confined passageway exceeding a predetermined value the passageway is vented to the environment.

US Patent:

55422616, Aug 6, 1996

Filed:

Apr 17, 1995

Appl. No.:

8/423202

Inventors:

Luther D. Albertson - New Albany IN
Walter R. Key - Indianapolis IN
Mark B. Key - Greenwood IN

International Classification:

F25B 4100

US Classification:

62174

Abstract:

The present invention relates to a fluid containment system for minimizing the loss of refrigerant fluid from a refrigerant evaporator. The mechanical refrigeration system includes an evaporator for absorbing energy from the cooling media. The evaporator includes a pressurized shell, which to comply with applicable safety codes requires a pressure relief system for relieving an over-pressure condition. A sealed over-pressure containment vessel is connected in fluid communication with the evaporator. The containment vessel receives liquid refrigerant from the evaporator in order to reduce the pressure in the evaporator, and the flow of refrigerant fluid from the evaporator to the containment vessel is controlled by a pressure differential therebetween. After the over-pressure condition in the evaporator has been corrected the liquid refrigerant in the containment vessel can be returned to the evaporator. The containment vessel while receiving liquid refrigerant from the evaporator allows for the reduction of pressure in the evaporator and acts to help prevent the discharge of refrigerant into the atmosphere.

US Patent:

56449305, Jul 8, 1997

Filed:

Mar 31, 1995

Appl. No.:

8/414292

Inventors:

Luther D. Albertson - New Albany IN
Walter R. Key - Indianapolis IN
Mark B. Key - Greenwood IN

International Classification:

F25B 4304
F16L 1700

US Classification:

62475

Abstract:

A pressure relief valve that is rotatable relative to the pressure relief system to allow flexibility in the connection of an outlet aperture in the pressure relief valve with a vent pipe in the building. A circumferential channel being formed on a conduit comprising a portion of the valve to receive a plurality of fasteners thereon for attaching the valve body to the conduit. Further, a tension relief bar having a pair of apertures is utilized to manually control the movement of a valve member relative to a valve seat within the valve body. One of the apertures being positioned for receiving a locking pin therein to hold the valve member apart from the valve seat. The capability to rotate and separate the valve body from the conduit allows for flexibility in servicing and connecting the valve body to the conduit.