E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/47
E21D 20/02 (2006.01)
Patent
CA 1256297
Abstract of the disclosure A method of feeding concrete into a drill hole in the concrete bolting of a rock, in which method a feeding hose is pushed into the hole and concrete is pumped into the hole through the feeding hose at the same time as the hose is drawn outwards within the hole. In order to ensure that the hole is filled properly, the amount of concrete pumped into the feeding hose for the distance the feeding hose is withdrawn, is greater than the concrete amount theoretically sufficient for filling an unbroken hole with concrete when the hose is withdraw said distance. A device designed for the realization of the method comprises a primary pump which pumps concrete into a piston-type metering pump which in turn pumps the metered amount of concrete into the feeding hose in pro- portion as the feeding hose is withdrawn. (Figure 1)
520653
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Oy Tampella Ab
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