Resumes
Resumes
Kan Cheng Phones & Addresses
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111 Rengstorff Ave, Mountain View, CA 94043 (650) 318-0157
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San Jose, CA
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Beltsville, MD
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Sunnyvale, CA
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Palo Alto, CA
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College Park, MD
Business Records
Name / Title
Company / Classification
Phones & Addresses
President
AMPO TECHNOLOGY, INC
40100 San Carlos Pl, Fremont, CA 94539
Publications
Us Patents
Air Circulating Shoe Pad
View pageUS Patent:
7316081, Jan 8, 2008
Filed:
Aug 2, 2004
Appl. No.:
10/909676
Inventors:
Kan Cheng - Newark CA, US
International Classification:
A43B 7/06
A43B 13/20
A43B 21/28
A43B 13/20
A43B 21/28
US Classification:
36 3R, 36 3 B, 36 29
Abstract:
A shoe pad includes air pumping elements for cooling the interior of a shoe. The pumping elements include forward pumping elements for pumping air from back to front, and backward pumping elements for pumping air from front to back. The pad includes an upper sheet attached to a lower sheet. Each pumping element includes a channel on the lower sheet covered by the upper sheet. The channel has an intake and an exhaust. Cavities are distributed along the channel. Resilient blisters on the upper sheet are aligned with the cavities on the lower sheet to define pumps. Each pump has an intake and an exhaust. Flap valves projecting down from the upper sheet are respectively positioned against the intakes of the pumps. Alignment pins projecting down from the top sheet are positioned in alignment holes on the lower sheet.
Resonant Thermoelectric Generator
View pageUS Patent:
20080115818, May 22, 2008
Filed:
Nov 22, 2006
Appl. No.:
11/562470
Inventors:
Kan K. Cheng - Newark CA, US
Mindy M. Cheng - Newark CA, US
Mindy M. Cheng - Newark CA, US
International Classification:
H01L 27/16
US Classification:
136205
Abstract:
A thermoelectric generator comprises an electrical circuit having two or more thermocouple junctions (), a switch (), a controller (), and a series resonant circuit consisting of a capacitor () and an inductor in the form of a transformer (). The thermocouple junctions operate between two temperature reservoirs () operating at temperatures T and T, respectively, that are sufficiently different to enable the circuit to supply power to a load (). Using sense lines () the controller forces the switch to advance to the next throw at the proper time, forcing the circuit to operate at or near resonance. With each operation of the switch, one junction at a time is connected to the resonant circuit, while one or more junctions are left in an open-circuit condition. By allowing the temporarily disconnected junctions sufficient time to reach thermal equilibrium with the temperature reservoirs, isothermal equilibrium is achieved. By reversing the polarity of each subsequently-connected junction, electrons in the thermally-equilibrated junctions experience a very rapid adiabatic expansion or compression when each junction is connected. The result is a thermoelectric generator that operates with an efficiency that is greater than the prior-art. Power regulation is accomplished through adjustments to the strength of the load and the temperatures of the reservoirs.
Torque Compensator For Motorcycle
View pageUS Patent:
59609001, Oct 5, 1999
Filed:
Jun 18, 1997
Appl. No.:
8/878032
Inventors:
Kan Cheng - Fremont CA
International Classification:
B60K 600
US Classification:
180165
Abstract:
Torque is generated by the rotating front road wheel of a motorcycle for balance. When the vehicle is traveling too slowly, too little torque is generated for adequate balance, and when the vehicle is traveling too quickly, too much torque is generated for safe maneuvering. A torque compensator for a motorcycle thus includes a sensor for detecting the angular momentum of the road wheel. The detected angular momentum is compared to a predetermined optimal angular momentum by a comparator. An electric flywheel attached to the steering fork of the motorcycle is driven at a variable speed to generate a compensating angular momentum equal to the difference between the angular momentum of the road wheel and the optimal angular momentum. When the angular momentum of the road wheel is below the optimum, the flywheel is driven in the same direction as the road wheel to provide supplemental momentum, so that the sum of their momentums is equal to the optimal angular momentum. When the angular momentum of the road wheel exceeds the optimum, the flywheel is driven in the opposite direction as the road wheel to provide a counteracting momentum, so that the sum of their momentums is still equal to the optimal angular momentum.
Resonant Thermoelectric Generator
View pageUS Patent:
57709114, Jun 23, 1998
Filed:
Jan 30, 1996
Appl. No.:
8/594011
Inventors:
Kan Cheng - Fremont CA
International Classification:
H01L 3700
US Classification:
310306
Abstract:
A resonant thermoelectric generator includes a thermoelectric power converter connected in series with a resonant circuit. A current generated by the thermoelectric power converter is cycled back and forth in the resonant circuit. The polarity of the thermoelectric power converter with respect to the resonant circuit is switched back and forth to correspond with the direction of the current. In a second embodiment, the thermoelectric power converter is coupled to the resonant circuit through a transformer, and its polarity is also switched to correspond with the direction of the current. In both embodiments, a negative retarding voltage that builds up in the thermoelectric power converter is eliminated by switching its polarity to always correspond with the direction of the current, so that energy is added to the resonant circuit in each cycle, and power is very efficiently converted from heat directly into electricity.
Clip-On Ic Retaining Apparatus
View pageUS Patent:
58019294, Sep 1, 1998
Filed:
Nov 5, 1996
Appl. No.:
8/740987
Inventors:
Kan Cheng - Fremont CA
International Classification:
H05K 702
US Classification:
361807
Abstract:
Many circuit boards include conventional sockets for receiving optional ICs. Such sockets are soldered to the circuit board during the manufacturing process. However, many of such sockets are wasted because they are never used. Such waste can be eliminated by using a clip-on IC retaining apparatus. It includes a housing, a retaining clip, and four registration holes arranged at the comers of a trace pad on a circuit board. The housing includes a shallow, open cavity on a bottom side for receiving a SMD. Four registration fingers projecting from the bottom of the housing mate with the registration holes on the circuit board to align the pins of the SMD with the trace pad. Ribs on the walls of the cavity slide between the pins to separate and straighten any bent pins. The retaining clip includes four downwardly bent flat springs connected in a rectangular pattern. Four slots in the housing extend vertically between the top thereof and the bottom of the fingers.
Vertical Wind Turbine With Rotatable Blades
View pageUS Patent:
20210071635, Mar 11, 2021
Filed:
Sep 8, 2019
Appl. No.:
16/563921
Inventors:
Kan Cheng - Newark CA, US
International Classification:
F03D 3/06
F03D 7/06
F03D 3/00
F03D 7/06
F03D 3/00
Abstract:
A vertical wind turbine with rotatable wind blades. Under wind pressure, each blade is capable to rotate and stop at a specified location for optimal angle of attack towards the wind to improve the efficiency of the turbine.Each blade is divided into two unequal area of airfoils with the aerodynamic center of the blade located in the larger area trail end. Under wind pressure, the turbine frame would stop the blades at locations where each blade has an optimal angle of attack towards the wind. As a result, blades in the upwind force zone encounter minimal drag force to improve the efficiency of the turbine.
Fuel-Air Injection Rotary Engine
View pageUS Patent:
20190301361, Oct 3, 2019
Filed:
Mar 27, 2018
Appl. No.:
15/937833
Inventors:
Kan Cheng - Newark CA, US
International Classification:
F02B 53/10
F01C 21/00
F01C 21/04
F02B 75/02
F02M 23/04
F02D 41/00
F01C 21/00
F01C 21/04
F02B 75/02
F02M 23/04
F02D 41/00
Abstract:
A FAIR engine system includes an air compressor subsystem where oxygen enriched air is compressed, stored and injected into the chambers of a FAIR engine to accelerate the chemical reaction and to reduce harmful mono-nitrogen oxides (NOx) emission
Two-Cycle Pneumatic Injection Engine
View pageUS Patent:
20150330297, Nov 19, 2015
Filed:
Jul 28, 2015
Appl. No.:
14/811652
Inventors:
Kan K. Cheng - Newark CA, US
International Classification:
F02B 75/02
Abstract:
A two-cycle engine that includes a high pressure fuel pump that pressurizes fuel to produce pressurized fuel and pumps the pressurized fuel from a fuel controller to a fuel injector. The fuel injector injects the pressurized fuel into a cylinder. A high pressure air pump pressurizes air to produce pressurized air and pumps the pressurized air from an air controller to an air injector. The air injector injects the pressurized air into the cylinder.