Ralph C Longsworth

6488120, Dec 3, 2002

Sep 15, 2000

09/662535

Ralph C. Longsworth - Allentown PA

SHI-APD Cryogenics, Inc. - Allentown PA

F01M 100

184 617, 184 616

In an oil-lubricated helium compressor unit, the adsorber can retain all of the oil that might be transferred from the compressor to the adsorber before the system shuts down. No oil is ever transferred or transferable to, for example, the expander in a GM type refrigeration system connected to the unit. The compressor itself will shut down because of a protective switch or seize for lack of oil before any oil carries outside the compressor unit. The unit and the connected refrigeration system can run for more than a selected design life before the compressor shuts down because the limit of oil in the adsorber has been reached. The adsorber can retain as much oil as might leave the compressor over the life of the system plus a safety margin of at least 25%. The adsorber need not be serviced or replaced for the life of the system.

6554103, Apr 29, 2003

Sep 11, 2002

10/244486

Ralph C. Longsworth - Allentown PA

Shi-Apd Cryogenics, Inc. - Allentown PA

F01M 100

184 617, 184 616

In an oil-lubricated helium compressor unit, the adsorber can retain all of the oil that might be transferred from the compressor to the adsorber before the system shuts down. No oil is ever transferred or transferable to, for example, the expander in a GM type refrigeration system connected to the unit. The compressor itself will shut down because of a protective switch or seize for lack of oil before any oil carries outside the compressor unit. The unit and the connected refrigeration system can run for more than a selected design life before the compressor shuts down because the limit of oil in the adsorber has been reached. The adsorber can retain as much oil as might leave the compressor over the life of the system plus a safety margin of at least 25%. The adsorber need not be serviced or replaced for the life of the system.

6629418, Oct 7, 2003

Jan 8, 2002

10/041700

Jin Lin Gao - Wescosville PA
Ralph C. Longsworth - Allentown PA

SHI-APD Cryogenics, Inc. - Allentown PA

F25B 900

62 6, 60520

Disclosed are two-stage inter-phasing pulse tube refrigerators with and without shared buffer volumes.

6715300, Apr 6, 2004

Apr 20, 2001

09/838840

Ralph C. Longsworth - Allentown PA

IGC-APD Cryogenics - Allentown PA

F25B 900

62 6, 165 4

Several layers of fine mesh screen are diffusion bonded together to form a rigid disc or plate that is self supporting and is a flow smoother at the ends of a pulse tube expander. Layers range from fine screens on the surface facing the pulse tube to coarser screens that provide structural support without significantly adding to pressure drop across the screen assembly. The flow smoother is typically used in series with a heat exchanger at the warm end that rejects heat to ambient from the gas of the pulse tube and a heat exchanger at the cold end that receives heat from the load being cooled.

7165406, Jan 23, 2007

Jan 8, 2003

10/500783

Ralph C. Longsworth - Allentown PA, US

SHI-APD Cryogenics, Inc. - Allentown PA

F25B 9/00
B01D 8/00

62 6, 62 555

An integrated cryopump and 2 stage pulse tube refrigeration system () comprising a cryopump, a compressor for a pulse tube refrigerator, a pulse tube refrigerator located within the vacuum chamber of the cryopump where the hot ends of the pulse tubes () are connected to each other through a buffer volume (), are integral to the cryopump vacuum chamber hosing, and a buffer volume () is connected to the hot ends () of the pulse tubes () through flow restrictors ().

7191600, Mar 20, 2007

Mar 5, 2003

10/500982

Jin Lin Gao - Allentown PA, US
Ralph C. Longsworth - Allentown PA, US

SHI-APD Cryogenics, Inc. - Allentown PA
Sumitomo Heavy Industries - Tokyo

F25B 9/00

62 6

This invention provides an improved means of quickly warming a pulse tube () by shifting the phase relation of flow to the warm end of the pulse tube relative to flow to the warm end () of the pulse tube relative to flow to the warm end of the regenerator () using a “four valve” concept and the “active buffer” concept. Several different pulse tube configurations and valve timing relations that are effective at reversing the cycle from the normal mode, which produces cooling at the pulse tube heat station, to a reverse mode that produces heating are disclosed.

7201004, Apr 10, 2007

Jan 8, 2003

10/500785

Ralph C. Longsworth - Allentown PA, US

SHI-APD Cryogenics, Inc. - Allentown PA
Sumitomo Heavy Industries, Ltd. - Tokyo

B01D 8/00
F25D 9/00

62 555, 62 6

The pulse tubes () and regenerators () contained within a cryopump housing () are arranged in a way that facilitates the fabrication and installation of the cryopanels (). The pulse tubes and regenerators are located in a common plane in the center of the cryopump housing and the cold (second stage) panels () that are pitched parallel to the plane with the tubes.

7305835, Dec 11, 2007

Jan 8, 2003

10/500786

Ralph C. Longsworth - Allentown PA, US

SHI-APD Cryogenics, Inc. - Allentown PA
Sumitomo Heavy Industries, Ltd. - Tokyo

F25B 9/00

62 6

The present invention applies to single or two stage pulse tube refrigerators that have one or more passive orifices at the hot end(s) of the pulse tube(s) through which gas flows to achieve phase shifting and the phase shifting gas flow circulates to a remote heat sink by adding check valves and an appropriate piping circuit.