Howard S Cox

US Patent:

20020191481, Dec 19, 2002

Filed:

Jul 23, 2002

Appl. No.:

10/201396

Inventors:

Sidney Cox - Blanco TX, US
Andrew Cox - Blanco TX, US
Howard Cox - Blanco TX, US
Randy Watt - Blanco TX, US
Kel Lisenby - , US

Assignee:

Cox Paving Company

International Classification:

B28C007/04
G05B021/00

US Classification:

366/016000, 366/008000, 366/020000, 700/265000

Abstract:

The present invention to provides for a novel asphalt mixing plant which is portable, that is, capable of being transported from one site to another. The portable asphalt mixing plant has a control system that adjusts the rate at which crumb rubber is added to oil so as to maintain a constant oil/rubber ratio in a mixer. The blending control process has a CPU to control the rate at which asphalt is pumped into a mixer and the rate at which crumb rubber is fed to the same mixer so as to maintain a constant asphalt rubber ratio in the produced asphalt. The main components of the portable asphalt mixing plant are located on a flatbed trailer and include the following: a hopper for storing loose crumb rubber; a crumb rubber delivery system for delivery of the crumb rubber from the hopper to the mixing chamber; a mixing chamber for the mixing therein; a delivery system for the delivery of asphalt (from a tank off the trailer) to the mixing chamber; a control system including motors, motor drives, a central processing unit, sensors, and computer program for the controlled delivery of crumb rubber and asphalt to the mixing chamber; a crumb rubber and asphalt mixing means including a motor and a onboard generator for powering the electrical elements of Applicant's system.