Patent ID: 7921502

Claim:
A system to remove accumulated snow and ice from the trailer rooftop of a semi-trailer truck, the system comprising: tracks having a left rail attached to and extending along a left side of the trailer rooftop and a right rail attached to and extending along a right side of the trailer rooftop, where the left rail and the right rail each include teeth configured to mesh with a cogwheel; a blade generally having a triangular shape, where the blade includes a blade top and a blade bottom positioned between a blade front and a blade rear, where the blade front and the blade rear have curved surfaces that oppose each other; an axle that extends through the blade; a left cogwheel attached to a left end of the axle, where the left cogwheel is meshed with the left rail; a right cogwheel attached to a right end of the axle, where the right cogwheel is meshed with the right rail; a left motor positioned to engage the left cogwheel; a right motor positioned to engage the right cogwheel; sensors embedded in the vehicle rooftop, where each sensor is configured to detect a depth of snow accumulated above that sensor and is configured to be in communication with the left motor and the right motor; and a control switch configured to be in communication with the sensors, the left motor, and the right motor, where the left motor and the right motor are configured to move the blade along the trailer rooftop by rotating the left cogwheel and the right cogwheel, respectively, in response to a signal from one of the sensors and the control switch.