| 摘要 |
<p>A self-propelled vehicle for use on surfaces which are to be undisturbed, the vehicle having a chassis (11), rollers (13, 14) mounted transverse to the chassis having two continuous belts (16) located thereabouts and means (hydraulic motors (21)) on the chassis to provide a driving connection with the rollers whereby the vehicle can be self-propelled. Steering is effected through selective driving of the respective belts. Various apparatus can be mounted on the chassis. A sand distributing apparatus is disclosed comprising a main hopper (30) for containing the sand, a conveyor (31) at the bottom of this hopper to move the sand out of the hopper to a distribution device comprising a delivery hopper (41) having a delivery roller (43) at the open bottom thereof and a rotary bristle brush roller (45) adjacent the delivery roller (43) to ensure delivery of all material on the delivery roller. Also disclosed is an apparatus to effect mixing of sand with a reinforcing material and comprises a hopper adapted to deliver sand, a main conveyor associated with the hopper and onto which the sand is received, a distribution apparatus by which reinforcing material can be placed on the sand on the conveyor and a flail at the end of the conveyor into which the sand/reinforcing mixture passes and which causes the mixture to forcibly strike a surface effecting mixing of the components.</p> |
