The Dempster Dumpmaster, introduced in the 1950s, was the first United States commercially successful front loading garbage truck.
Built by Dempster Brothers, Inc of Knoxville, Tennessee, they used the Dempster-Dumpster system of mechanically emptying standardised metal containers, which had been patented by the company in 1937. It had arms at the front that picked up a dumpster and lifted it over the cab to tip it into the hopper. A rearward travelling compacting panel compressed the garbage stored in the truck, and was also used to push it out through a door at the back when it was being emptied.