Note: Descriptions are shown in the official language in which they were submitted.
CA 02770251 2012-03-01
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SEISMIC DRILLING BIT WITH PIVOT RING FOR USE IN ANCHOR
INSERTION
The present invention relates to a seismic drilling bit
meant to be used for the insertion and setting of anchors, such
as drop-in and wedge type anchors, and, more particularly, the
present invention relates to a seismic drilling bit with a pivot
ring for the insertion and setting of anchors into brittle
materials such as concrete, stone, masonry and cementuous
materials.
BACKGROUND OF THE INVENTION
Anchors are conventionally used in construction to attach
various components of a building construction to an overhead
ceiling or other structure. Such components to be attached can
relate to, for example, services that provide plumbing,
electrical, drainage, sprinkler system piping and drop ceilings.
From these anchors, which are usually of the wedge or drop-in
type variety, all of the above services and ceilings are
suspended or secured.
Conventionally, in setting anchors in concrete to suspend
an awning, for example, a hole is pre-drilled in the surface to
which the anchor is to be applied, and then the anchor is
inserted into the pre-drilled hole. However, when setting such
anchors in concrete it is not uncommon for such anchors to
weaken and loosen over time, particularly in situations where
cracking or chipping of the concrete around the pre-drilled hole
has occurred.
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Furthermore, studies have revealed that cracking can
typically occur in the concrete element, and that such cracks
can significantly impact the performance of anchors. Cracks can
originate on a concrete beam or slab in a variety of ways, such
as creep, temperature settlement of the support or foundation,
thermal expansion and contraction stress overload, or from a
natural disaster such as an earthquake or flood. In such
situations, the situation can arise where, if one such concrete
anchor fails and lets go, the remaining anchors, by virtue of
the weight they additionally assume in light of such failure,
can also similarly collapse and fail.
It has been found that enlarging the upper (interior) part
of the pre-drilled hole can allow for the use of anchors in a
more secure manner. It has further been found that providing a
pre-drilled hole with an enlarged upper end can be
advantageously provided by a drill bit having an enlarged
cutting portion adjacent the tip, which is inserted into the
pre-drilled hole, whereby the enlargement of the cutting portion
is configured so that it can pass through the shaft of the pre-
drilled hole to the upper end to be enlarged.
It would therefore be advantageous to have an improved
seismic drilling bit meant for use in a pre-drilled hole for the
insertion and setting of anchors into brittle materials such as
concrete, stone, masonry and cementuous materials.
It would be further advantageous to have an improved
seismic drilling bit for use in a one step process for both
creating a drill hole and, at the same time, enlarging a
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lowermost end of a drill hole, wherein an anchor can later be
positioned and securely retained within the enlarged area.
It would also be further advantageous to have an improved
seismic drilling bit meant to be used for the later insertion
and setting of anchors which utilizes a pivot ring for coming
into contact with a surface being drilled and thus restricting
downward movement of the seismic drill bit within the drill
hole, the pivot ring having an outermost diameter greater than
that of the drill hole and a remainder of the drill bit, whereby
the pivot ring permits tilting movement of the bit body during a
drilling process to enlarge the lowermost end of the drill hole.
To this end, the present invention effectively addresses this
need.
SUMMARYOFTHEINVENTION
The present invention provides an improved seismic drilling
bit meant for use in a pre-drilled hole for the insertion and
setting of anchors into brittle materials such as concrete,
stone, masonry and cementuous materials.
The present invention also provides an improved seismic
drilling bit for use in enlarging an upper end of a pre-drilled
hole, wherein an uppermost end of the pre-drilled hole can be
further drilled to have a greater circumference than that of the
remainder of the pre-drilled hole, whereby an anchor can be set
more securely therein.
The present invention also provides an improved seismic
drilling bit having a pivot ring for coming into contact with a
surface being drilled and thus restricting downward movement of
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the seismic drill bit within the drill hole, the pivot ring
having an outermost diameter greater than that of the drill hole
and a remainder of the drill bit, whereby the pivot ring permits
limited tilting movement of the bit body during a drilling
process to enlarge the lowermost end of the drill hole.
According to a first broad aspect of an embodiment of the
present invention, there is disclosed a seismic drill bit for
effecting a drill hole and enlarging a lowermost end thereof for
a later insertion and setting of anchors therein, the bit
comprising a substantially cylindrical bit body sized to fit
into the drill hole, the bit body having a first end region
constructed and arranged to be operatively connected to a drill
and a second end region disposed generally opposite said first
end region, wherein a quad cutting portion is positioned to
protrude from the second end region, the quad cutting portion
having an operational cutting radius greater than a cutting
radius of the bit body; and a pivot ring for coming into contact
with a surface being drilled and thus restricting downward
movement of the seismic drill bit within the drill hole, the
pivot ring having an outermost diameter greater than that of the
drill hole and a remainder of the drill bit, whereby the pivot
ring permits limited tilting movement of the bit body during a
drilling process to enlarge the lowermost end of the drill hole.
An important advantage of the present invention is that it
provides an improved seismic drilling bit which can be connected
to a conventional drill, meant for use in a pre-drilled hole for
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the insertion and setting of anchors into brittle materials such
as concrete, stone, masonry and cementuous materials.
Another important advantage of the present invention is
that it provides an improved seismic drilling bit having a pivot
ring for coming into contact with a surface being drilled and
thus restricting downward movement of the seismic drill bit
within the drill hole, the pivot ring having an outermost
diameter greater than that of the drill hole and a remainder of
the drill bit, whereby the pivot ring permits limited tilting
movement of the bit body during a drilling process to enlarge
the lowermost end of the drill hole.
BEJEFINESICEIPTIONCIFTEMERVWTNGS
The embodiments of the present invention will now be
described by reference to the following figures, in which
identical reference numerals in different figures indicate
identical elements and in which:
Figure 1 is a side view of an embodiment of the seismic drilling
bit of the present invention;
Figure 2 is a side view illustrating the seismic drilling bit
shown in Figure 1 beginning to effect, initially, a drill hole;
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Figure 3 is a side view illustrating the seismic drilling bit
shown in Figure 1 enlarging a lower end of the drill hole during
the drilling process.
DETAILEDDESCRIPTIONOFTHEINVENTION
The invention will be described for the purposes of
illustration only in connection with certain embodiments;
however, it is to be understood that other objects and
advantages of the present invention will be made apparent by the
following description of the drawings according to the present
invention. While a preferred embodiment is disclosed, this is
not intended to be limiting. Rather, the general principles set
forth herein are considered to be merely illustrative of the
scope of the present invention and it is to be further
understood that numerous changes may be made without straying
from the scope of the present invention.
The present invention consists of an improved seismic
drilling bit designed for insertion and use in enlarging an
upper end of a pre-drilled hole for receiving and securely
retaining an anchor therein. The drilling bit which can be
rotatably mounted onto a conventional drill, or, alternatively,
onto an elongated mounting assembly, which in turn is rotatably
mounted to a conventional drill.
Referring to Figure 1, there is shown a seismic drilling
bit shown generally at 1 in accordance with a first exemplary
embodiment of the present invention, for use in the later
insertion and setting of anchors into concrete, stone, masonry
and cementuous materials. In a preferred embodiment, the
proximal upper end 5 of the seismic drilling bit 1 is
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constructed and arranged to be releasably secured to a drill by
way of a drill spindle (not shown). In this manner, the bit
itself, without any other necessary parts, can be easily
attached to a drill to effect the drilling of a drill hole and
enlarging a lowermost end thereof, whereby an anchor can be set
more securely therein.
Preferably, the seismic drilling bit 1 will be made of a
durable, machinable metal and is substantially cylindrical in
shape. The seismic drilling bit 1 is, preferably, of a one-piece
construction that comprises an upper end 5 and a lower end 9
which are integrally connected to one another. The drilling bit
1 can also have a fluted body or a non-fluted body.
With reference to Figures 1, 2 and 3 it can be seen that
the bit body 11 of the seismic drilling bit 1 can effect the
drilling of a drill hole, and has a first diameter (and cutting
radius) sized to readily fit into a drill hole (not shown), and
possesses, as most conventional drill bits do, at least one
cutting edge and at least one groove extending in a helical
fashion along a length of the bit body 11 of the seismic
drilling bit 1. In a preferred embodiment, these extend along a
substantial length of the bit body 11, or, alternatively, extend
along at least half a length of the bit body 11.
The lower end 9 of the seismic drilling bit 1 has a quad
cutting portion 13 positioned at the lowermost end of the
seismic drilling bit 1, as seen in Figures 1, 2 and 3, the quad
cutting portion 13 having a greater outermost width than that of
the bit body 11 whereby, when the seismic drilling bit 1 is
inserted fully into a lowermost end 43 of the drill hole 45 and
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rotated during the drilling process (as shown in Figure 3), so
as to effect a conical shape in the drill hole 45, the quad
cutting portion 13 enlarge a circumference of the drill hole 45
at the lowermost end 43 thereof that is greater than the
circumference of the remainder of the shaft of the drill hole
45.
With reference to Figures 1, 2 and 3, the seismic drilling
bit 1 further comprises a pivot ring 14. As shown in Figures 2
and 3, when the drilling bit is used to effect a drilling hole
45 and is inserted further into the hole 45, the seismic
drilling bit 1 (see Figure 2) can only be pushed downwardly to a
certain point, at which the pivot ring 14 comes into contact
with the surface being drilled, thus restricting further
downward movement of the seismic drilling bit 1. Once the
seismic drilling bit 1 is positioned into the hole 45, the
seismic drilling bit 1 and pivot ring 14 can operably be rotated
(by the user rotating the drill during the drilling process), as
shown in Figure 3, to provide for wider rotation of the seismic
drilling bit 1 inside the hole 45 with a view to enlarging a
lowermost end 43 of the drill hole 45 to receive an anchor.
In operation, the seismic drilling bit 1 is to be rotatably
mounted and connected onto a drill (not shown) by way of spindle
5, and the assembly is positioned over a surface where a drill
hole is to be made. Once the seismic drilling bit 1 is sunk to a
pre-set depth and rotated, rotational drilling (and tilted
rotational drilling as previously described) by the seismic
drilling bit 1 can then be effected in creating an enlarged area
of the lowermost end of a drill hole. By virtue of pivot ring 14
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the seismic drilling bit 1 (see Figures 2 and 3) can only be
pushed downwardly to a certain point, at which the pivot ring 14
comes into contact with the surface being drilled, thus
restricting further downward movement of the seismic drilling
bit 1. Once the seismic drilling bit 1 is fully positioned into
the hole 45, the seismic drilling bit 1 and pivot ring 14 can
then operably be rotated (by the user rotating the drill during
the drilling process), the pivot ring controlling the amount of
rotational tilting during the drilling process, as shown in
Figure 3, and providing for a greater range of rotation of the
seismic drilling bit 1 inside the hole 45 with a view to
enlarging a lowermost end 43 of the drill hole 45.
Of course, by virtue of the quad cutting portion 13 having
a greater outermost width (and operational cutting radius) than
that of the bit body 11, the quad cutting portion 13, when the
seismic drilling bit 1 is rotated, enlarges a circumference of
the drill hole 45 at the lowermost end 43 (in creating the
enlarged area). In this manner, once the enlarged area has been
created, and the seismic drilling bit 1 removed from the drill
hole, the anchor (not shown) can be inserted, and, when the
anchors have been flanged outwardly by conventional means within
the drill hole, the flange portions of the anchor can rest
within the enlarged area, thus securely retaining the anchor in
place.
It will be apparent to those skilled in this art that
various modifications and variations may be made to the
embodiments disclosed herein, consistent with the present
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invention, without departing from the spirit and scope of the
present invention.
Other embodiments consistent with the present invention
will become apparent from consideration of the specification and
the practice of the invention disclosed therein.
Accordingly, the specification and the embodiments are to
be considered exemplary only, with a true scope and spirit of
the invention being disclosed by the following claims.
