Patent ID: 7407339

Claim:
A wheeled concrete working device movable over a surface of uncured concrete and operable to establish a desired grade of the uncured concrete surface, said wheeled concrete working device comprising: a wheeled support selectively movable in a forward direction and a rearward direction, said wheeled support comprising a forward frame portion supported by at least one front wheel and a rearward frame portion pivotally attached to said forward frame portion and supported by at least one rear wheel; a plow assembly mounted to said forward frame portion, said plow assembly including at least one plow member for engaging and establishing the desired grade of the concrete and a concrete surface working member for engaging and smoothing the concrete surface at the established grade when said wheeled support is moved in said rearward direction, said wheeled concrete working device being operable in response to a signal from a laser receiver mounted at said plow assembly to adjust an elevation of said plow member relative to said concrete surface working member to establish the desired grade of the concrete in the path of travel ahead of said concrete surface working member when said wheeled support is moved in said rearward direction; and a user input that is adjustable by an operator of said wheeled concrete working device to adjust a down pressure of said concrete surface working member of said plow assembly at the concrete when said wheeled support is moved in said rearward direction, said user input being actuatable by the operator to actuate an actuator that urges said plow assembly downward relative to said wheeled support to increase the down pressure of said concrete surface working member of said plow assembly during rearward movement of said wheeled support.