Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Reexamination Certificate
2006-09-27
2009-06-16
Barr, Michael (Department: 1792)
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
C134S123000, C134S16700R, C134S16700R, C134S16800C, C134S171000, C134S172000, C137S615000
Reexamination Certificate
active
07546843
ABSTRACT:
Residual concrete in the drum of a ready mixed concrete truck is removed by high-pressure water. A nozzle is mounted on the leading end of a torpedo-shaped nozzle housing that is hingedly mounted to an elongate boom. The boom enters the mouth of the drum at an angle that matches the angle of the drum. The hinge allows the nozzle housing to pivot with respect to the elongate boom so that the nozzle is close to the residual concrete. The boom is retracted toward the mouth with the drum rotating in the mix direction and the nozzle oscillating so that it cuts through a swath of concrete. As the boom retracts, the torpedo-shaped nozzle housing maintains the nozzle close to the residual concrete on the drum and both sides of the helical fins. The nozzle sweeps an arc from about eighty to one hundred twenty degrees as it oscillates.
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Boos Frederick A.
Boos Scott F.
Charo Michael W.
Barr Michael
Blasters, LLC
Patel Rita R
Smith Ronald E.
Smith & Hopen , P.A.
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