YOUNG CHO, DPT
Physical Therapy at Kings Hwy, Cherry Hill, NJ

2002012, Sep 5, 2002

Feb 25, 2002

10/082660

Young Cho - Cherry Hill NJ, US

A61N007/00

601/002000

A method and apparatus for preventing or at least mitigating renal failure due to the presence of contrast media agents administered to patients. The method and apparatus applies either mechanical vibration, including ultrasonic energy, or heat to the vicinity of the kidneys at the patient's back to reduce the blood viscosity of the blood in the microvessels of the kidney.

6484565, Nov 26, 2002

Jul 2, 2001

09/897164

Sehyun Shin - Bryn Mawr PA
Young Cho - Cherry Hill NJ
Kenneth Kensey - Malvern PA
William N. Hogenauer - Gilbertsville PA
Sangho Kim - Philadelphia PA

Drexel University - Philadelphia PA

G01N 1100

73 5401, 73 5404

An apparatus and method for determining the viscosity of a fluid over plural shear rates caused by a decreasing pressure differential by monitoring the movement of the fluid through a riser tube and a capillary tube. The movement can be monitored by detecting the changing weight of the fluid, using a precision balance or load cell, as it moves through the riser tube and capillary tube into a fluid collector; or, alternatively, the movement can be monitored by detecting the changing level of a fluid column in the riser tube using a column level detector. A processor then uses the changing weight or height data, along with the dimensions of the capillary tube and a dimension of the riser tube, to determine the viscosity of the fluid. In addition, apparatus and methods for determining fluid viscosity online and fluid mixture homogeneity online are also described.

6651451, Nov 25, 2003

Apr 23, 2002

10/131564

Young T. Cho - Cherry Hill NJ
Cheolho Bai - Taegu, KR

Vai Holdings, LLC - Phoenixville PA

F25B 4900

62197, 62 5

A variable capacity refrigeration system which does not require a costly inverter compressor and does not exhibit low energy efficiency at high capacity. The system employs a constant speed compressor that operates continuously when the system is energized, irrespective of the heat load, and a refrigerant bypass path including a secondary expansion device, a heat exchanger, and a flow control device which is operable to permit a portion of the refrigerant exiting from the condenser to flow through the bypass path to an inlet of the compressor when the heat load is below a predetermined threshold, whereby the heat exchanger operates as a secondary evaporator, and to prevent refrigerant exiting from the condenser from flowing through the bypass path to the compressor inlet when the heat load is not below the predetermined threshold. In one embodiment, the flow control device is further operable to permit a portion of the refrigerant exiting from the compressor to flow through the bypass path to the primary evaporator through the primary expansion device when the heat load is not below the predetermined threshold, whereby the heat exchanger operates as a secondary condenser. In several embodiments, a pressure differential is maintained between the refrigerant in the heat exchanger and the evaporator.

6598465, Jul 29, 2003

Jul 1, 2002

10/186736

Seyhun Shin - Bryn Mawr PA
Young Cho - Cherry Hill NJ
Kenneth Kensey - Malvern PA
William N. Hogenauer - Gilbertsville PA
Sangho Kim - Philadelphia PA

Rheologics, Inc. - Exton PA

G01N 1143

73 54, 324 711, 73 5401, 73 5414

A scanning rheometer is presented for the rheological property measurement of electrorheological (ER) and magnetorheological (MR) fluids using a non-linear viscoplastic model, based on the fluid height variation with respect to time. The rheometer basically includes a static (e. g. , an overhead reservoir) or a dynamic source of fluid, a channel or slit whose sides form electrodes which are in contact with the flowing ER fluid, or a capillary tube exposed to a static/alternating magnetic field for flowing MR fluids, a transfer tube, either one or two riser tubes, and a column level detector for monitoring the column of fluid as it moves in one of the riser tubes. The column level detector is coupled to a processor which analyzes, among other things, column height vs. time data to determine both viscosity and yield stress. The rheometer overcomes one of the major drawbacks of the conventional rheometer: the inability to produce the yield stress of the ER, or MR, fluid in an absolute zero shear rate range.

6450974, Sep 17, 2002

Nov 8, 2000

09/708137

Sangho Kim - Philadelphia PA
Sehyun Shin - Bryn Mawr PA
Young I. Cho - Cherry Hill NJ

Rheologics, Inc. - Exton PA

A61B 500

600573, 73 6448

A method for isolating the effects of surface tension and/or yield stress of a fluid that is flowing in a U-shaped tube wherein one or both legs of the U-shaped tube is monitored over time for the changing height of the respective fluid columns therein. A portion of the U-shaped tube comprises a flow restrictor, e. g. , a capillary tube, of known dimensions. Monitoring one or both of the moving fluid columns over time permits the determination of the viscosity of the fluid flowing therein over a range of shear rates from the difference in fluid column heights. However, it is necessary to isolate the effects of surface tension and/or yield stress to obtain an accurate viscosity determination. The method provides one manner in which the surface tension effect can be subtracted from the difference in fluid column heights and then any yield stress effect can then be determined. Alternatively, the method also provides a process by which both the surface tension effect and yield stress effect can be determined simultaneously.

6624435, Sep 23, 2003

Dec 27, 2001

10/033841

Kenneth Kensey - Malvern PA
William N. Hogenauer - Gilbertsville PA
John E. Nash - Chester Springs PA
Harold E. Clupper - West Chester PA
Sangho Kim - Philadelphia PA
Young Cho - Cherry Hill NJ
Peter Randolph Hazard Stark - Andover MA
Roberto O. Pellizzari - Groton PA
Sergey Kruss - Millis MA

Rheologics, Inc. - Exton PA

G01N 1506

250577, 250576

An apparatus and method for measuring the viscosity of Newtonian and non-Newtonian fluids over a range of shear rates, especially low shear rates, by monitoring two rising columns of fluid (Newtonian or non-Newtonian) that pass through respective capillaries having different lengths. Furthermore, a specialized column monitor is provided that uses multiple interrogation sources (e. g. , lasers) and a single detector (e. g. , a charge-coupled device (CCD) array) to continuously monitor both columns of fluid substantially simultaneously. In particular, the system includes a Y-connector to form two flow paths and wherein each flow path includes a tube that includes a riser tube, a capillary tube of predetermined dimensions and a valve in each for controlling the fluid flow in each path. The specialized column monitor monitors the movement of the fluid columns in each of the riser tubes and an associated microprocessor analyzes these movements, along with the predetermined dimensions of the capillary tubes and riser tubes to determine the viscosity of the fluid.

2011026, Nov 3, 2011

Aug 7, 2008

12/672005

Young I. Cho - Cherry Hill NJ, US
Alexander Fridman - Marlton NJ, US
Alexander F. Gutsol - San Ramon CA, US
Yong Yang - Philadelphia PA, US

B01D 24/46, B01D 25/32, B01D 24/00, B01D 35/16

210269, 134 11, 210409, 2103231

The present invention is directed to a novel method for cleaning a filter surface using a plasma discharge self-cleaning filtration system. The method involves utilizing plasma discharges to induce short electric pulses of nanoseconds duration at high voltages. These electrical pulses generate strong Shockwaves that disintegrate and dislodge particulate matter located on the surface of the filter.

2002004, Apr 25, 2002

Aug 23, 2001

09/935979

Young Cho - Cherry Hill NJ, US
Cheolho Bai - Taegu, KR

Vortex Aircon

F26B019/00, F26B025/06, F26B003/00

034/443000, 034/219000, 034/224000

A drying structure and process has a wet or damp mass to be dried in a container. Hot dry gas is fed into the container to flow over and/or through the mass to be dried, and the vapor-containing gas which is produced by contact with the mass is discharged from the container to the input of a vortex tube. The vortex tube separates the humid vapor into a liquid which may be discharged, and a dried gas which is recirculated back to the container for further drying of the mass.

5916490, Jun 29, 1999

Jul 21, 1997

8/897070

Young I. Cho - Cherry Hill NJ

Electronic Descaling 2000, Inc. - Boothwyn PA

B01F 304

261 721

A humidifier is provided of the type which has a water tank or reservoir for holding tap water. Common tap water frequently is "hard" due to dissolved minerals which result in the humidifier emitting a fine dust when such water is used. By affixing electroplated electrodes to the interior of the tank minerals such as calcium carbonate can precipitate on the surface of the cathodes. Temporarily reversing the polarity of the electrodes will cause the calcium carbonate to be dislodged from the electrodes and fall to the bottom of the reservoir where it can be removed.

6250086, Jun 26, 2001

Mar 3, 2000

9/517922

Young I. Cho - Cherry Hill NJ
Cheolho Bai - Taegu, KR

Vortex Aircon, Inc. - Cherry Hill NJ

F25B 902, F25B 1300, F25B 100

62 5

An improved refrigeration system utilizing one or more vortex tubes. Vortex tubes produce liquid refrigerant from saturated-state vapor refrigerant in a vapor-compression refrigeration cycle. The efficiency of a refrigeration system can be improved by placing a vortex tube before the evaporator. The efficiency of a refrigeration system may also be improved by placing a vortex tube in the condenser approximately one-quarter of the way from the inlet of the condenser. The efficiency of a refrigeration system may also be improved by placing a vortex tube before the compressor.