Note: Descriptions are shown in the official language in which they were submitted.
1 ~? 2 3 ~
CROSS REFERENCES TO PRIOR ART
U.S. patent No. 927,064 - xpansion ~olt. H.~'.
~ower issued July 6, 1909.
U.S. patent No. 1,869,8~7 - Pole Fitting. A.O.
Austin issued Aug~st 2, 1932.
U.S. patent No. 2,183,551 - Hose Clamp, A.L. Dold
issued December 19, 1939.
U.S. patent No. 2,241,343 - Expansion Shell ~or
Machine Bolts, J, Fleaca issued May 6, 1941.
U.S. patent No. 2,626,023 - Drill Post. E.B. Lear
issued January 20, 1953.
U.S. patent No. 2,642,768 - Rock Anchor. H.R.
Ogburn issued June 23, 1953.
U.S. patent No. 2,900,698 - Quick Acting Hose
Clamp. H.P. Zartler issued August 25, 1959.
U.S, patent No, 3,187,858 - Anchoring Device. N.H.
des Champs issued June 8, 1965.
U.S. patent No. 3,413,693 - Clamping Collar. C.F.
!~ Tonnelline issued December 3, 1968.
U.S. patent No. 3,514,911 - Line Pole Rock Anchor
Brackets, R.N. Preradovich issued June 2, 1970.
U.S. patent No. 3,747,468 - Anchor Bolt. J.W.
Jansen et al. issued July 24, 1973.
; U.S. patent No. 3,993,341 - Deck Struc~ure and
i,~
-: 2
J ~ J ~
Connectoe ~or Building Construction- C.A- Bentley issued
November 23, 1976.
U.S. patent No. 4,160,614 - Expansion Shell Assem-
bly and Method for Combining Resin Bonding and Mechanical
Anchoring of a Bolt in a Rock Formation. S.F. Koval issued
July 1~, 1979.
V.S. patent No, 4,218,858 - Tri-Anchor Bracket for
Poles. S. Legler issued August 26, 1980.
U.S, patent No. 4,362,440 - ~ubular Lost Borehold
Closure. O.-E. Gllaesmann et al. issued December 7, 1982.
BACKGROUND OF THE INVENTION
This invention relates to brackets for anchoring
poles such as hydro or telephone poles upright on the ground
and more particularly to brackets suitable for anchoring
poles in rocky, rugged terrain where the surfaces on which
the poles rest need not be horizontal or on ground beneath
which sewage or electrical conduits are located where the
location of the anchoring means for the brackets is extreme-
ly restricted.
This application is a division of application
serial number 516,006 5 filed in the Canadian Patent Office
on August 14, 1986.
. .
~ .
:`
~ 3~
Various brackets are known for maintanining pol es
vertical on rocky ground. The brackets are connected to
anchor bolts which are secured in holes drilled in the
ground adjacent to where the pole is to stand. U.S. patent
No. 3,514,911 to Preradovich and U.S. patent No. 4,218,858
to Legler both referred to above, describe brackets suitable
for this purpose.
A shortcoming of known brackets such as those
described in the patents referred to above is that they are
generally unsuitable where the holes in which the anchor
bolts are secured are inaccurately located. Should for exama
ple those holes not extend exactly vertically downward it is
not possible to tighten the anchor bolts in the holes except
with the greatest of difficulty. Similarly if the holes are
not spaced apart from the poles an exact predetermined
distance, the brackets cannot be secured in such a way as to
minimize lateral movement of the pole after the pole is
attached to it
.. .
The reason why the holes must be accurately lo~
cated is because the brackets are held in position by elong~
ated bolts which extend downwardly through sleeves in the
brackets and into the holes. The bolts must be rotated in
`;
:;
order to fasten them in the holes. Should the holes not be
accurately located the bolts must be bent to fit into those
; holes. The greater the amount of bend the more difficult it
is to rotate the bolts. In fact it is altogether impossible
to rotate the bolts should the amount of bend be too great.
SUMMARY OF THE INVENTION
It is an object of this invention to provide a
clamp which is suitable for attaching a bracket to a pole.
Another object of this invention is to provide a
clamp which is suitable for attaching poles of a wide
, variation in outside diameters to a bracket.
These and other objects are accomplished by a
clamp for attaching a bracket or a pole-mount to a pole
~ comprising a link having a hook for removable intercon
; nection to said pole~mount and a threaded portion for
threadable connection to said pole~mount.
~,
..
~':
" 5
.
.,
DESCRIPTION OF THE DRAWIN~;S
The invention is described in detail with refer-
ence to the accompanying drawings in which:
Figure 1 is a perspective view of the bracket of
the invention in conj~nction with a hydro or telephone
pole;
Figure 2 is a plan view of the ~racket and pole;
Figure 3 is an elevation, partly in section, on
lines 3-3 of Figure 2;
Figure 4 is an exploded perspective view of the
CGmponents of the bracket of the invention;
Figure S is a fragmentary elevation, partly in
sectionO of the components of the bracket in an assembled
~ 3
state;
Figuee 6 is an othec elevation, partly in section,
of the asse~bled components;
Figure 7 is an elevation, partly in section, of
the lower end of the bracket;
Figure 8 is a perspective view of the bracket,
pole and a ratchet and socket extension used in the instal-
lation of the bracket;
Figure 9 is a perspective view of the components
10 of the bracket used for connection to the pole;
Figure 10 is a perspective view of a template used
in the attachmént of the bracket; and
Figures 11 and 12 are two plan views of the tem-
plate in conjunction with a pole.
Like reference characters refer to like parts
throughout the description of the drawings.
DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to Fiqure 1, the bracket of the
invention, generally 20, is shown in conjunction with a
hydro or telephone pole 22. The bracket includes a pole-
mount 24 and a pair of spaced clamps 26.
The pole-mount is made up of a base 30 and an
upright 32. The base is vertically extendinq and has an
under surface 34 which rests on the ground or other rupport
. .
surface for the pole~ The upright has a generally U shaped
cross section and i~ made ~p of a central web 36 which
contacts the pole and two spaced flanges 38 which extend at
generally right anqles from the two side edges of the web.
A number of vertically spaced reinforcing ribs 40 extend
between the flanges.
With reference to Figure 1, each clamp 26 is made
up of a pair of bands 42a, b which are attached to the
exterior flange walls and which extend circumferentially
around the pole. An aperture is formed in each band and a
link 44 extends between the bands and its ends pass through
the apertures.
The bands may be attached to the pole-mounts by
welding or they ~ay be bolted to them. Alternatively as
illustrated in Figures 2, 3 and 9, the bands 43 pass
through slots 48, 49 in the two flanges of the mount and
extend outwardly from opposite sides of the same mount.
Where the bands are so formed, they are free to slide
horizontally in the slots in the pole-mounts.
With further reference to Figures 2 and 9, link 44
is in the form of a bent rod having a ~hreaded end portion
44a. The opposite end 44b has a forged offset head or hook
44b which is removably accommodated in a key-hole 45 formed
in band i3a. The threaded end of the link is inserted in
,.,~
,.,
,; 8
s
,:
~ ~.
:
~ ~L?~3~
the aperture for~ed in band 43b. A nut SOa prevents the
threaded end from being removed from the band. The key-hole
shape ensures that the rod will not become disconnected
from the band when assembled as ill~strated in Figure 2.
When the links are so assembled, the links, the
bands and the pole-mounts together extend around the entire
circumference of the pole. The assembly restrains the pole
from movement and the pole is thus anchored in position.
There is no need to ~se lag bolts to prevent the pole-
mounts from turning with respect to the pole.
With reference to ~igures 4 and 5, the pole-mount
is shown in conjunction with the components which together
form a leg for anchoring the pole-mount to the ground. The
leg, generally 50, is made up of a sleeve 52, a camming
plug 54 and an inner member or bolt, generally 56. A pair
of horizontally spaced parallel slots 58 are formed on the
under surface 34 of the pole-mount. The slots commence at
; the wall 32a of the upright 32 which faces the pole and
extend at generally right angles to that wall. The slots
terminate at a stop 60. The slots removably accommodate
opposite edges of a plate 62 which is attached to theupper
wall of sleeve 52.
Connected to the lower end of the sleeve by, for
example, welding are circumferentially arranged segments
,, .
.
r
.
66, the outer diameter of which being the same as that of
the sleeve to which the segments are attache~. ~ space or
slot 67 is between adjacent segments. As illustra~ed in
Figures 6 and 7, each segment is shaped in the form of an
wedge which opens upwardly and inwardly i.e. the wedge is
thinnest at its lower edge 66a and thickens upwardly. Those
segments constitute expandible means for engaging the wall
of the hole in which the sleeve is inserted. The way in
which they do so is described below.
Camming plug S4 serves to urge the segments 66 between
the slo~s outwardly or to expand. The plug has a frusto-
conical outer wall of the same slope as that of the inner
wall of the segments. A number of ribs 68 are formed on its
outer wall. The number of ribs is the same as the number of
slots 67. The width of the ribs is slightly less than the
width of the slots and the ribs are so arranged that each
will fit into a separate slot. As a result the plug can be
; positioned concentrically within the sleeve.
The outer diameter of the conical wall of the plug
at its upper wall 70 is slightly greater than the inside
, diameter of the segments. The conical wall of the plug
enlarges downwardly and, at its lower wall, its outer
diameter exceeds the inside diameter of the segments. The
` outer diameter of the ribs is the same from the upper to
:
the lower walls of the plug. A threaded bore 72 exeends
along the longitudinal axis of the plug.
Bolt 56 has a shank 73 which removably passes
through an enlarged aperture 74 in base 30 and downwardly
through the sleeve. As illustrated in Figure 5, head 76 of
the bolt has an outer diameter which is larger than the
width of the aperture so that it cannot pass through the
aperture.
With reference to Figure 6 and 7, the lower por-
tion of the shank is threaded at 78 and those threads matethreadably with the threads in the bore of plug 54. The
ribs 68 of the plug are in the slots between segments 66
and will prevent the plug from rotating as the bolt is
rotated. Rotation of the bolt will accordingly cause the
plug to rise on the shank of the bolt from the position
shown in Fig~re 6 to the position shown in Figure 7, In the
latter figure, the conical wall of the pluq which contacts
the inside wall of the segments causes them to move radial-
ly outwardly of the longitudinal axis 80-80 of the sleeve
and into contact with the wall 82 of the hole in which the
sleeve is located.
Further upward movement of the plug causes the
segments to more firmly contact the inside wall of the hole
and to cause the sleeve to become more and more solidly
.:
11
;
anchored in the hole.
With reference to Figure 8, bolt 56 is rotated by
oscillation of handle or ratchet 82 which is removably
connected to the upper end of a socket extension 84. A
socket 86 at the lower end engages the head of the bolt and
causes it to rotate when the handle is oscillated.
The socket extension is prevented from rocking or
swaying when it is being rotated by means of pair of arms
88 which apply an inward pressure against dia~eterically
opposite sides of an enlarged portion of the socket exten-
sion. The ends of the arms remote from the socket extension
are attached to tabs 90 which fit snugly into the space
between the bands 42 and the pole. The tabs can be with-
drawn from the space and the socket and socket extension
are removed after the bolt has been tiqhtened sufficiently
to anchor the sleeve in the hole.
~ With reference to Figure 10, a template, generally
; 52, facilitates the location of the holes to be drilled
Y where the pole i~ to be anchored by means of three brack-
ets. The template consists of three sleeves 94, 96 and 98,
Sleeve 94 consiste of a lower segment 94a of outside dia-
~; meter slightly less than the diameter of the hole which is
to be drilled and an upper segment 94b of greater diameter.
The other two sleeves 96, 98 have uniform cross-sections
.,.
~; 12
i:
:~ ,
~,
'''
.:
~ c~
thr~ugho~lt tll~i r 1 ~n~ t ~
~ n ex~andihle arn 100 extends between sleeves 94
and 96 and a like arm 102 extends between sleeves 94 and
98. As illustr~ted the longitu~inal axes o~ both arms are
oriented at right angles to the longitudinal axes of the
sleeves and the angle between the axes of the arms is
approxi,nately 60 degrees.
A stud 104 extends inward from each sleeve. The
length of the stud determines the distance of the hole ~rom
the pole in the manner described below.
Arm 100 consists of a hollow rectang~lar first
section lOOa which is attached to sleeve 94. A second
rectangular section lOOb is connected to sleeve 96 and is
slidingly received in the hollow interior of section lOOa.
By means of set screw 106 the two sections can be locked
together in any desired position. The position of sleeve 94
relative to sleeve 96 can accordingly be increased or
decreased.
The construction of arm 102 is the same and lts
length can likewise be adjusted by means of set screw 108.
Fig~res 11 and 12 illustrate the manner in which
the template can be used to locate the position of the
holes which must be drilled in the ground. First a hole is
drilled beside the place where the pole is to stand. Sec-
~'3 ~l~
ondly while the pole is resting horizontally on the ground
the te~plate is placed beside the lower end of the pole
such that the pole is between its arms as illustrated in
those Figures. Thirdly the two set screws are loosened to
allow the length of the arms to be adjusted until the studs
104b and 104c contact the outside wall of the pole portion.
The te~plate is then sepaeated from the pole by moving it
to the end of the pole.
The lower segment of sleeve 94 is then inserted
into the hole that was drilled in the ground. The upper
segment which has an outside diameter greater than the
cross-section of the hole will remain on top of the hole.
Two more holes are then drilled using the other two sleeves
as guides. The three holes will be correctly located ac-
cording to the size of the pole.
In Figure 12 the pole has a smaller outside dia-
meter than the pole illustrated in Figure 11 and the length
of arms 100 and 102 are correspondingly shorter to reflect
the smaller diameter.
The holes which are drilled must have a cross-
sectional area slightly greater than that of the outside
wali of the sleeves so that the sleeves can be easily
inserted into the holes. After the holes have been drilled
and before the pole is moved into position for anchoring,
.: . .
t
.'
~ 14
~ .
one sleeve is attached to a pole-mount by inserting its
Dlate 62 into slots 58 so that the sleeve an~ mount are
connected as illustrated in Figure 5.
Bolt 56 is then inserted downwardly through the
aperture 74 of the pole-mo~nt and through the central bore
of the sleeve and while the sleeve and the mount are out-
side the hole the plug is turned onto the lower end of the
bolt and the bolt is rotated until the upper ends of its
ribs are just within slots 64 of the sleeve. The asse~bly
is then inserted into the hole.
The pole is then raised by some suitable means
such as by a mobile crane and is positioned upright beside
the pole-mount. The other two pole-mounts are then con-
nected to the legs in the manner described above and are
placed in position adjacent to the other two holes. The
three mounts must be at the same level and shims may be
used for this purpose. The three pole-mounts are then
interconnected by means of clamp 26.
....
The three mounts may then be anchored by tighten-
ing the bolts connected to each by means of the socket
~,
assembly 82, 84 and 86 with resulting stabilization and
, anchoring of the pole in an upright position. Should the
r wall of the holes crumble, the mounts will not be satis-
~ factorily anchored. In such case, the mounts must be moved
.
,~
~ ~ Q ; j /1 ,~
to a new loeation where they can be properly anchored.
Once the pole-mounts are properly anchored, grout-
ing of the holes is not necessary since the strength o~ the
installation depends only on the jamming action of the
segments in the holes.
With reference to Figure 3, it will be observed
that the ground on which the pole is mounted is not horiz-
ontal and the hole in which one leg is located is not
vertical. ~11 that is required is that the pole-mounts be
anchored in the ground by means of legs 50. When the pole
is to be mounted on uneven ground the pole-mounts should be
shimmed up with rocks so that the bands of the clamps are
horizontal. After the pole is clamped to the assembly, the
shims may be removed since the pole is supported by the
pole-mounts and legs and not by the weight of the pole on
the ground. Backfilling or grouting of the holes in which
the legs are located are not necessary.
; Sinoe the bracket of the invention does not re-
quire any grout or cement to maintain it in position, the
bracket may bè removed after use. To do so, the pole must
be held upright by means of, for example, a crane and the
three bolts must be loosened~ As the bolts are loosened,
the bolt head will move upward from the base of the brack-
et. A sharp blow to the bolt head will move the bolt down-
:.
~ ~ f' -~ g '~ f.~
ward and release the camming plug from the segments 66 of
the sleeve. The entire assembly can then be lifted easily
~rom ~he hole.
The bracket of the invention is designed to allow
for variations in the size o~ the outer diameter of the
pole. As illustrated in Figure 4, aperture 74 in the base
of the pole-mount is elongated and allows ~he pole-mount to
be moved backward and forward to accommodate poles of
; larger or smaller diameter. In addition by reason of the
; 10 elongated apertures, the leg to which the pole is attached
need not be vertical. The aperture allows the bolt which
passes through it to be oriented in different directions.
Figure 3 illustrates this.
The clamp can likewise accommodate poles of diff-
erent diameters. As illustrated in Figure 2, the effective
length of each link can be changed by means of the nut
which is turned on its threaded end portion. By advancing
the nut toward the hook, for example, the effective length
of the link is shortened. When the link is in the assembly
illustrated in Figure 2, the area bounded by the links and
bands is reduced as the effective length of the links is
reduced. Conversely the area is increased so that a pole of
larger diameter can be accommodated simply by increasing
the effective length of each link in the assembly.
17
,
.
In the event that the links cannot be lengthened
sufficiently to accommodate a large pole all that is neces-
sary is to substitute longer links for the existing links
in the assembly of links and bands.
It will be understood from the foregoing that the
pole-mount of the invention will accommodate all sizes of
- poles normally encountered in practice as will the bands of
the clamp. The only component that may not accommodate
poles of all sizes is the link. For that reason it is
advisable on a job site to stock lin~s of different sizes.
However because of the adjustability of the links very few
different sizes of links are necessary.
In general it is preferable for the pole-mounts
which support a pole to be about 120 degrees apart. However
this is not essential. Where the terrain makes this impos-
sible the design of the clamps is such that the spacing
between adjacent pole-mounts can be ad~usted according to
the spacing between pole-mounts. It is not necessary that
the effective length of the links in an assembly of links
, 20 and bands be the same.
,. Preferably the pole-mount and the camming plug are
....
cast in malleable iron and the clamps and the remaining
components of the legs are formed of galvanized steel.
It will be understood of course that modifications
,
,.,
~ 1~
. ~
., .
~'~ih~ f~
can be made in the preferred embodiment described herein
without departing from the scope and purview of the invent-
ion as defined in the appended claims.
.~
~.
,
