With Conveyor Patents (Class 37/373)
Wheel and belt (Class 37/374)
Longitudinal endless conveyor (Class 37/375)
  • Method and equipment for simultaneous excavation and land refill with minimum operating labor
    Patent number: 5782020
    Abstract: An excavator with a wireless controlled hopper-spreader allows a single operator to strip off topsoil and spread the stripped off soil more or less evenly after a mineable substance such as gravel is removed. The hopper-spreader uses about a fifty foot conveyor and may be totally operated by an operator in the excavator cab. This combination may be both faster and cheaper than a normal dragline operation.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: July 21, 1998
    Inventor: L. Wade Shumaker