Chi Cheng

US Patent:

54372208, Aug 1, 1995

Filed:

May 24, 1994

Appl. No.:

8/248161

Inventors:

Chi Cheng - Clarendon Hills IL
Michael W. Cheng - Clarendon Hills IL

International Classification:

F16J 102
F16J 104

US Classification:

92178

Abstract:

This invention relates to a piston with its skirt being cut to locate four sets of bearing pads and circulating bearing balls. Each pad has been milled to have a doughnut shaped groove with half of a circle cross-section to hold the ball bearing in circulation during the piston reciprocating motion. Two lines of bearing balls on each side of a piston pin are in contact with the cylinder liner and share the piston thrust load. Lubrication of the ball bearings is ensured by oil slots through the piston skirt under the oil ring groove to the top of the grooves of the bearing pads and to the exposed bearing balls in rolling contact.

US Patent:

61348422, Oct 24, 2000

Filed:

Apr 3, 1997

Appl. No.:

8/832300

Inventors:

Chi Cheng - Clarendon Hills IL
Akimi C. Cheng - Clarendon Hills IL

International Classification:

E06B 926
F24J 254

US Classification:

52 1

Abstract:

A window/light shelf system enhances the daylight illumination with no glare. The air space between the double panes of the window is enlarged, and a mini blind-like, light reflective or absorbing, low transparent glass plates unit is integrated in the middle to control the daylighting and to eliminate the glare. With the light reflective unit open and closed per solar/climate conditions, the system serves as a window, a light shelf with no glare, a solar heating source in the winter, and a solar heat reflector in the summer.

US Patent:

56156006, Apr 1, 1997

Filed:

Aug 17, 1995

Appl. No.:

8/516236

Inventors:

Chi Cheng - Clarendon Hills IL
Akimi C. Cheng - Clarendon Hills IL

International Classification:

F16J 102

US Classification:

92178

Abstract:

This invention relates to a piston with its skirt being cut to locate four sets of bearing pads and circulating roller bearings. Each pad has been milled to have a doughnut shaped groove with half of a roller cross-section to hold the roller bearing in circulation during the piston reciprocating motion. Two lines of roller bearings on each side of a piston pin are in contact with the cylinder liner and share the piston thrust load. Lubrication of the roller bearings is ensured by oil slots through the piston skirt under the oil ring groove to the top of the grooves of the bearing pads and to the exposed roller bearings in rolling contact.

US Patent:

54473535, Sep 5, 1995

Filed:

Mar 18, 1994

Appl. No.:

8/214545

Inventors:

Chi Cheng - Clarendon Hills IL
Mickie H. Cheng - Clarendon Hills IL

International Classification:

B60J 306

US Classification:

296 972

Abstract:

An automotive polarizer screen shade with two parallel plane polarizers, one rectangular and one circular in shape, is invented. The large rectangular semi-transparent polarizer allows the driver to see most of the road clearly while the smaller circular polarizer slides and/or rotates independently to screen the direct sunlight so that the light intensity is tolerable.

US Patent:

58933182, Apr 13, 1999

Filed:

Apr 3, 1996

Appl. No.:

8/626802

Inventors:

Chi Cheng - Clarendon Hills IL
Akimi C. Cheng - Clarendon Hills IL

International Classification:

F16J 102

US Classification:

921691

Abstract:

This invention relates to a piston with skirt being formed by four sets of bearing grooves as the main structure, and a cylinder liner with four ball bearing rolling tracks. The bearing groove is in doughnut shape and has a circular cross-section to hold the ball bearing in circulation during the reciprocating motion of the piston. Two lines of ball bearings on each side of a piston pin are in line contact to the bearing tracks of the cylinder liner and share the piston thrust load. Lubrication of the ball bearings is ensured by oil slots through the piston head under the oil ring groove to the exposed ball bearings in rolling contact and to the top of the bearing groove.