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Method for removing concrete from interior surfaces of a concrete mixing drum

  • US 6,640,817 B2
  • Filed: 07/09/2002
  • Issued: 11/04/2003
  • Est. Priority Date: 10/30/1998
  • Status: Expired due to Fees
First Claim
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1. Method for removing concrete from interior surfaces of a concrete mixing drum, the drum including an open end communicating with the interior and at least one interior surface facing away from the open end, the method comprising the step of:

  • rotating the drum while moving at least one fluid discharge nozzle mounted adjacent to an end of an elongate probe longitudinally through the drum interior, the fluid nozzle being positioned and operated so as to discharge a stream of fluid against the at least one interior surface facing away from the open end under sufficient pressure to remove at least some of any concrete thereon that has not fully cured, the probe including a stop switch mounted adjacent the end thereof which is moved in the drum for contacting an end of the drum opposite the open end for initiating movement of the probe outwardly from the drum.

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