Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1979-06-01
1981-04-07
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Chemical
E02D 312
Patent
active
042602955
ABSTRACT:
An injector which is intended for the injection of material under high pressure through bores or other holes in rock or other solid material is provided with an injector pipe, a tubular shell, and injector nozzle and an expansion device which, during the injection operation, seals against the wall of the bore. The injector nozzle is releasable from the end of the injector pipe and is disposed to cooperate with a sleeve included in the expansion device in order to press the sleeve against the wall of the bore and in order, together with the sleeve, to form an expanded unit which, after the injection phase, is released from the injector pipe and remains, in the expanded state, in the bore. The injector nozzle is designed as a non-return valve, in that it has a cupola-like valve portion consisting of elastomer material and bridging the end of the injector pipe. The valve portion has through-flow slits which extend obliquely inwardly from the outside of the cupola-like valve portion in a direction towards the injector pipe, such that material pressure against the outside of the cupola-like valve portion realizes a sealing compression of the through-flow slits.
REFERENCES:
patent: 2960831 (1960-11-01), Lonaberger et al.
patent: 3108442 (1963-10-01), Miller
patent: 3130552 (1964-04-01), Bodine
patent: 4074735 (1978-02-01), McCabe et al.
Corbin David H.
Trelleborg AB
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