Tools – Wrench – screwdriver – or driver therefor – Stud-removal and implacement
Reexamination Certificate
2002-09-10
2003-07-29
Wilson, Lee D. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Stud-removal and implacement
C081S057330, C081S064000, C081S120000
Reexamination Certificate
active
06598499
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to tools, and more particularly to a new and improved universal setting tool which is especially adapted for use in connection with the insertion and fixation of different diameter rebars and threaded rods within, for example, blind bores formed within concrete, masonry, rock, and similar substrates or underlying substructures, wherein a suitable adhesive or other similar bonding material is disposed within the blind bores for fixedly securing the rebars and threaded rods therewithin when the adhesive bonding material cures and sets.
BACKGROUND OF THE INVENTION
Rebars and threaded rods, studs, or anchors are extensively utilized within, for example, the construction industry in order to mount various components upon concrete, masonry, rock, and similar substrates or underlying foundations. Normally, the substrate or underlying foundation is provided with a blind bore within which the rebar or threaded rod, stud, or anchor is to be fixedly secured by means of, for example, a suitable adhesive bonding material, which has been previously disposed within the bottom portion of the blind bore or hole, upon curing and setting of the adhesive material. Exemplary threaded stud or anchor systems are disclosed within U.S. Pat. No. 4,982,625 which issued to Bonner on Jan. 8, 1991, and U.S. Pat. No. 4,404,875 which issued to Sadanandan et al. on Sep. 20, 1983. As disclosed within
FIG. 1
, which substantially corresponds to
FIG. 1
of the Sadanandan et al. patent, a blind bore
10
has been drilled within a concrete, masonry, rock, or similar foundation
14
, and in order to fixedly secure a threaded stud
5
within the drilled bore
10
, a capsule or ampule
8
containing adhesive resin materials is disposed within the bottom of the bore or hole
10
. A drive unit
1
comprises an upper end portion
3
which is adapted to be mounted within a chuck mechanism
12
of a rotary drill, not shown, and a lower end portion
4
which is externally threaded in a manner similar to that of the threaded stud
5
. An internally threaded nut member
6
is adapted to join the lower externally threaded end portion
4
of the drive unit
1
to the upper end portion of the threaded stud
5
as a result of the convexly shaped end portion
11
of the drive unit
1
being disposed in abutment with the upper planar end portion of the threaded stud
5
.
When the threaded stud
5
is to be fixedly secured within the bore or hole
10
of the foundation or substrate
14
, the lower chamfered or tapered end portion
7
of the threaded stud
5
is forced downwardly against the capsule or ampule
8
so as to fracture the same, and upon actuation of the drill tool, not shown, the threaded stud
5
is driven downwardly to the bottom end portion of the bore or hole
10
so as to not only be seated within the lowermost depth portion thereof but to also agitate and fully mix the adhesive resin materials or components together. When the threaded stud
5
is fully seated within the lowermost depth region of the bore or hole
10
, operation of the drill tool is terminated, and a pair of wrenches are respectively applied to the nut member
6
and the intermediate hexagonally-configured portion
2
of the drive unit
1
. Upon rotation of such members
6
,
2
in the opposite directions, the drive unit
1
is separated from the nut member
6
and the threaded stud
5
. When the adhesive bonding materials cure and set, the threaded stud
5
is fixedly secured within the foundation
14
so as to permit various components or devices to be mounted thereon or attached thereto. While the aforenoted patented system or assembly is operatively viable, it is apparent that in order to release the,drive unit
1
from the threaded stud
5
which is mounted within the foundation
14
, the disengagement operation or procedure is relatively time-consuming due to the need for utilizing a pair of wrenches, and in addition, in light of the fact that a pair of wrenches are required to be used, additional tools need to be carried or utilized by the operator personnel.
Accordingly, the threaded stud or anchor system, as disclosed within the aforenoted patent to Bonner, was developed so as to effectively overcome the various operational disadvantages or drawbacks characteristic of the anchor system disclosed within the aforenoted patent to Sadanandan et al., and as disclosed within
FIG. 2
, which corresponds substantially to
FIG. 1
of the Bonner patent, a drilled hole
11
is formed within a concrete foundation member
10
, and a breakable capsule
12
, containing a suitable chemical adhesive material, is disposed within the bottom of the bore
11
. An externally threaded stud or anchor
13
is adapted have its conically shaped or pointed lower end portion
14
inserted within the drilled bore
11
, while the upper end portion of the threaded stud or anchor
13
is adapted to be disposed within a driver
18
. The lower end portion of the driver
18
is provided with an internally threaded bore
26
, and the axially inner end portion of the bore or hole
26
is undercut or radially enlarged as at
27
, while the transversely extending end wall of the bore or hole
26
has an axially tapered face
28
.
An adaptor
30
is releasably attached to the upper end portion of the driver
18
by means of a transversely oriented retainer pin
38
and is provided for operatively connecting the driver
18
to a rotary drive means, such as, for example, an electric drill, not shown. The adaptor
30
comprises an upper shank portion
31
which is adapted to be disposed within the chuck portion of the drill, and a lower shaft portion
34
which is adapted to be seated within an axial bore
35
formed within the upper body portion
19
of the driver
18
. The transversely extending pin
38
extends through a transverse bore
40
formed within the upper body portion
19
of the driver
18
, as well as through a transverse bore
39
formed within the adaptor shaft portion
34
, and is retained in position by means of an O-ring
41
disposed within a peripheral groove
42
. It is noted that when the upper end portion of the threaded stud or anchor
13
is disposed within the internally threaded bore or hole portion
26
of the driver
18
, the axially tapered face
28
comprising the transversely extending end wall of the bore or hole
26
will be disposed in pressed contact with the convexly shaped upper end portion
15
of the threaded stud or anchor
13
. It is further noted that the mode of operation of drivingly inserting the threaded stud or anchor
13
within the bore
11
of the foundation
10
is submitted to be readily apparent, and is similar to that previously described in connection with the aforenoted patent to Sadanandan et al., and therefore, a detailed description of the same will be omitted. In addition to the use of suitable chemical adhesive materials, within such anchor bonding systems such as those disclosed within the aforenoted Sadanandan et al. and Bonner patents, wherein the chemical adhesive materials are initially disposed within self-contained capsules or ampules which are adapted to be subsequently fractured by means of the lower end portions of the threaded rods or anchors, it is noted that other types of adhesive components may also be used within such anchoring systems, such as, for example, the rope, slug, or stick as disclosed within U.S. Pat. No. 6,416,256 which issued to Surjan et al. on Jul 9, 2002.
While the aforenoted threaded anchor insertion systems of Bonner and Sadanandan et al. have proven to be commercially successful, it can nevertheless be readily appreciated that the systems of Bonner and Sadanandan et al. are only capable of being used to drivingly insert threaded rods or anchors into the pre-drilled bores or holes within the underlying substrates or foundations in view of the fact that threaded engagement must be defined between the upper free end portion of the threaded rod or anchor and the driver or drive unit. Accordingly, such drive insertion systems
Grant Alvin J.
Illinois Tool Works Inc.
Schwartz & Weinrieb
Wilson Lee D.
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