Plug member

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2003-11-07

2009-08-04

Kreck, John (Department: 3672)

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

Reexamination Certificate

active

07568862

ABSTRACT:
A plug member (10) for retaining grout in a cable bolt hole or a rockbolt hole or inside a rockbolt in underground excavations, comprising a cylindrical cap portion (20) with a means to wedge (26) the cap portion in the hole. The means to wedging means (26) may comprise a plurality of inclined flaps, a continuous resilient skirt, or a tapered bung. The cap portion (20) is provided with at least one port (50) to receive a grout delivery hose. The or each port (50) is comprised of a plurality of flexible flaps (56) moveable between an open position and a closed position. In the closed position the flaps (56) inter-engage to substantially close the port (50) and prevent grout leakage from the hole.

REFERENCES:
patent: 3204416 (1965-09-01), Williams
patent: 3379019 (1968-04-01), Williams
patent: 4066125 (1978-01-01), Bassani
patent: 4669540 (1987-06-01), Luoma et al.
patent: 41 25 011 (1993-01-01), None
patent: 2 500 053 (1982-08-01), None
patent: 2 011 840 (1994-04-01), None
patent: 1046531 (1983-10-01), None
patent: 1081355 (1984-03-01), None
patent: 1375830 (1988-02-01), None
patent: WO 93/01362 (1993-01-01), None
patent: 9308215 (1994-08-01), None

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