Patent ID: 8308394
Filing Date: 2012-11-13
Classification: E01C

Abstract:
1. A system provided on a pothole patcher for creating a vacuum that pulls aggregate out of a hopper and into a flow path of forced air that is provided by an air source and extends through a forced air flow path outlet, the system comprising: a vacuum chamber formed in a vacuum body and disposed proximate to the hopper; a valve disposed between the vacuum chamber and the hopper, the valve configured to open and close for permitting and blocking communication between the vacuum chamber and the hopper; a reduction nozzle in communication with and provided between the air source and the vacuum chamber, wherein the reduction nozzle is configured to create a vacuum in the vacuum chamber by reducing the pressure of the forced air entering the vacuum chamber; and an air receiving eductor in communication with and provided between the vacuum chamber and the forced air flow path outlet, wherein the vacuum pulls aggregate from the hopper to the vacuum chamber when the valve is open.