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AssigneeJusand Nominees Pty Ltd
InventorsSam Thomas, Gerry Noonan
Estimating the term…
The present invention provides a retainer device 1 for retaining or holding an anchor rod 11 of a rock anchor, especially a self-drilling anchor, in a hole H drilled above horizontal. The retainer device 1 comprises: a body portion 2 configured to be mounted on the anchor rod 11, e.g., on an outer or external periphery of the anchor rod, and at least one locking arm or tab 6, 7 that projects from the body portion 2 in a direction transverse to a longitudinal extent of the anchor rod 11. The body portion 2 is configured to engage an abutment or shoulder on the outer or external periphery of the anchor rod to prevent its movement relative to the anchor rod 11 in use, and the at least one arm or tab 6, 7 is configured to deform so as to engage and bear against an inner wall W of the hole H when the retainer device 1 mounted on the anchor rod 11 is driven into the hole H. The invention also relates to a rock anchor system 10, comprising: at least one elongate anchor rod 11; a drill bit 12 configured for attachment to one end region 13 of the elongate anchor rod 11 for drilling the anchor rod 11 into rock strata R; and at least one retainer device 1 according to the invention described above for retaining or holding the anchor rod 11 in a hole H drilled in the rock strata R above horizontal. The invention also provides a method for installing a rock anchor.
A retainer device for retaining or holding an anchor rod of a self-drilling anchor in a hole drilled above horizontal, the retainer device comprising:
A drill bit configured for attachment to an end region of an elongate anchor rod of a rock anchor system, the drill bit comprising a retainer device having at least one arm or tab that projects outwards in a direction transverse to a longitudinal extent of the anchor rod, the at least one arm or tab being configured, in use, to deform to engage and bear against an inner surface of a hole drilled by the drill bit as the drill bit is driven into the hole.
A coupling member configured for interconnecting ends of two elongate anchor rods in a rock anchor system for substantial longitudinal alignment of the anchor rods, the coupling member comprising a retainer device having at least one arm or tab that projects outwards in a direction transverse to a longitudinal extent of the coupling member or anchor rods, the at least one arm or tab being configured, in use, to deform to engage and bear against an inner surface of a hole above horizontal as the coupling member is, in use, driven with the anchor rods into the hole.
A drill bit for a self-drilling rock anchor system, the drill bit configured for attachment to an end region of an elongate anchor rod and comprising a retainer device for retaining or holding the anchor rod in a hole drilled above horizontal, the retainer device comprising a body portion mounted on an outer periphery of the drill bit, and at least one arm or tab that projects outwards from the body portion in a direction transverse to a longitudinal extent of the anchor rod, wherein the at least one arm or tab is configured, in use, to deform to engage and bear against an inner surface of the hole when the drill bit is driven into the hole.
Dependencies are inferred from the claim text.