Field of the Invention
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The present invention relates to a lacing system for an article of footwear
and more specifically, the invention relates to a lacing device for fastening a boot.
Background of the Invention
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A most common form of footwear lacing assembly uses a simple lace passing
through a series of eyelets located on both sides of the footwear opening. The
lace is pulled to close the opening about the user's foot and the tension in the
lace can be adjusted for a comfortable fit. This basic system, entirely satisfactory
for light shoes having but a few eyelets on each side of the opening, becomes
less satisfactory with boots where the length of the lace and the number of
eyelets make it cumbersome to adjust the tension along the entire opening of the
boot. The lace must often be tightened in sections starting from the lower portion
of the opening to the upper portion of the opening while holding on to the lace to
maintain the tension when moving the hands to the next section.
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US Pat. No. 245,387 discloses eyelets having V-shaped formations in which the
lace is wedged during the tightening process. US Pat. No. 245,387 also
discloses a lacing hook having a V-shaped formation of a different design.
These eyelets and hooks provide a means of wedging the lace at least partially in
order to help in the tightening of the boot. However, the user must still go
through the tedious process of tightening the boot section by section.
Furthermore, the lace may end up being wedged so tightly that it becomes
difficult to pull.
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Some boots have been fitted in the upper portion of the boot with lacing hooks
having teeth such that when the bottom portion of the boot is tightened, the lace
is engaged to these lacing hooks in order to lock the lace under tension and
complete the fastening of the upper part of the boot. Such a lacing hook is
partially disclosed in US Pat. No. 5,761,777. These locking hooks by their design
do not allow the lace to slide and cannot be used to pull on the lace for
tightening. They serve as a lace locking means to assist in the transition point
between the lower and upper portion of the boot.
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Canadian Patent No. 1,001,843 discloses a skate boot having a plurality of
plastic side loops on each side of the boot's opening instead of the standard
eyelets. The interior portion of the side loops has a curvilinear profile, which
enables the lace to slide therethrough and allow the user to tighten the lace with
a single pull. Top side loops are provided with a locking element in which the
user introduces the lace under tension to lock the lace as the user makes the
final knot.
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US Pat. No. 5,956,823 also discloses a lacing assembly in which a plurality of
low friction guide elements are located on each side of the boot's opening and in
which the lace passes. Guide/blocking elements are located on each side of the
boot opening at the upper end of the lacing zone. The user is able with a single
pull on the end of the lace, to tighten the entire lower portion of the boot. The
guide/blocking element has a cylindrical sliding portion in which the lace is
inserted and a blocking portion comprising a series of teeth. The user pulls the
lace in an upward direction through the sliding portion and when the desired
tension is attained, brings the lace across the opening and into the blocking
portion of the guide/blocking element. The user may complete the knot while the
lace tension is maintained.
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Both lacing assemblies disclosed in Canadian Patent No. 1,001,843 and US Pat.
No. 5,956,823 use guiding and blocking elements having tunnel-like
passageways in which the lace is inserted. The lace must therefor be already
threaded into the passageways prior to tightening the boot. For boots of a
certain height such as in-line roller skate boots, the insertion of the foot may be
impaired or difficult due to the lace being already threaded into the passageways
of the last guide/blocking elements positioned at the top portion of the boot. To
facilitate the insertion of the foot, the user may have to remove the lace from the
last guide/blocking which implies that the user must re-thread the lace into the
tunnel-like passageways every time. To alleviate this drawback, Canadian
Patent No. 1,001,843 limits the number of side loops to a minimum to provide
more length of lace for opening the boot for insertion of the foot. In US Pat. No.
5,956,823, the last guide/blocking elements are positioned on the lower portion of
the boot's opening. The ankle portion of the boot must be tightened by other
means.
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Finally, in each patent is described a method of tightening the lace comprising a
first step of pulling on the lace and a second step of wedging the lace into the
blocking portion of the blocking elements. This method therefore entails two
movements of the hands; the second movement being deliberately away from
the pulling direction in order to secure the lace under tension in the blocking
portion.
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Thus there is a need in the footwear industry for a lacing device that alleviates
some of the limitations encountered in prior art lacing assemblies, and is capable
of acting simultaneously as a guiding member to allow a lace to slide and as a
braking member to maintain tension in a lace once tightened.
Summary of the Invention
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It is an object of the present invention to provide a lacing device adapted to
acting simultaneously as a guiding member to allow a lace to slide and as a
braking member to maintain tension in a lace once tightened.
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In accordance with a broad aspect, the invention provides a lacing stud for
slidably retaining a lace, the lacing stud comprising:
- a post having a top portion, a lower portion and an intermediate portion between
the top portion and the lower portion and mounting means for mounting the
lacing stud to a footwear, the mounting means being connected to the post. The
post includes a curved groove generally parallel to the mounting means and
extending at least partially around the periphery of the post in the intermediate
portion thereof for defining a neck portion for guiding and slidably retaining a lace
engaged therein. The curved groove has braking means for impeding sliding
motion of the lace when a pulling force is applied to the lace in a normal upward
lace tightening direction. The braking means is disposed within a portion of the
curved groove which is engaged by the lace during exertion of a pulling force
applied to the lace in a normal upward lace tightening direction. The braking
means restricts the lace from sliding back through the curved groove even when
the pulling force applied to the lace is substantially less than that required for
normal lace tightening.
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Preferably, the braking means comprises at least one locking tooth protruding
from the inner side surface or the outer side surface. Advantageously, the
braking tooth comprises a leading edge having a mild inclination to allow the lace
to slide smoothly in a first direction and a trailing edge having a sharp inclination
which restricts the motion of the lace in a second direction opposite the first
direction.
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In a specific embodiment, the lacing stud comprises an insertion restriction
adapted to partially enclose the lace within the curved groove such that the lace
has to be snapped in and out of engagement with the curved groove of the lacing
stud.
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In accordance with another broad aspect, the invention provides a boot
comprising a sole and an upper including a left quarter and a right quarter
disposed at opposite sides of the upper and defining an opening therebetween
for insertion of the user's foot inside the boot. The boot includes a tongue
depending from a toe area and connected thereto, the tongue closing the
opening and providing cushioning means for a front portion of the user's foot and
ankle. The upper further comprising:
- a plurality of side loops disposed on both sides of the opening;
- at least one pair of lacing studs for slidably retaining a lace, the lacing stud
comprising:
- a post having a top portion, a lower portion and an intermediate portion between
the top portion and the lower portion and mounting means for mounting the
lacing stud to a footwear, the mounting means being connected to the post. The
post includes a curved groove generally parallel to the mounting means and
extending at least partially around the periphery of the post in the intermediate
portion thereof for defining a neck portion for guiding and slidably retaining a lace
engaged therein. The curved groove has braking means for impeding sliding
motion of the lace when a pulling force is applied to the lace in a normal upward
lace tightening direction. The braking means is disposed within a portion of the
curved groove which is engaged by the lace during exertion of a pulling force
applied to the lace in a normal upward lace tightening direction. The braking
means restricts the lace from sliding back through the curved groove even when
the pulling force applied to the lace is substantially less than that required for
normal lace tightening.
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Other aspects and features of the present invention will become apparent
to those ordinarily skilled in the art upon review of the following description of
specific embodiments of the invention in conjunction with the accompanying
figures.
Brief Description of the Drawings
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A detailed description of the preferred embodiments of the present
invention is provided herein below, by way of example only, with reference to the
accompanying drawings, in which:
- Figure 1 is a perspective view of a boot featuring a first embodiment of a lacing
device in accordance with the invention;
- Figure 2 is a top plan view of the lacing device shown in Figure 1 remove from
the boot;
- Figure 3 is a side elevational view of the lacing device shown in Figure 2;
- Figure 4 is a cross-sectional view of the lacing device taken at line 5-5 of Figure
3 showing the path followed by a lace during tightening and cross over;
- Figure 5 is a cross-sectional view of the lacing device taken at line 6-6 of Figure
3 showing the path followed by a lace during tightening and cross over;
- Figure 6 is a front elevational view of the lacing device shown in Figure 2;
- Figure 7 is a perspective view of a lacing device according to a second
embodiment of the invention;
- Figure 8 is a front elevational view of the lacing device shown in Figure 7;
- Figure 9 a side elevational view of the lacing device shown in Figure 7; and
- Figure 10 is a top plan view of the lacing device shown in Figure 7.
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In the drawings, preferred embodiments of the invention are illustrated by
way of examples. It is to be expressly understood that the description and the
drawings are only for the purpose of illustration and as an aid to understanding.
They are not intended to be a definition of the limits of the invention.
Detailed Description of Preferred Embodiments
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Figure 1 illustrates a typical in-line roller skate boot 20 having a sole 22 and an
upper 24. Upper 24 includes a left quarter 26 and a right quarter 28 disposed at
opposite sides of upper 24 and defining an opening 30 therebetween for insertion
of the user's foot inside boot 20. Boot 20 includes a tongue 32 depending from a
toe area 34 and connected thereto, tongue 32 closing opening 30 and to the
extent required, providing cushioning for the front portion of the user's ankle and
foot.
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Inner edges 36 and 38 of quarters 26 and 28 which define opening 30, include a
plurality of side loops 40 arranged in opposing pairs evenly spaced apart along
the lower portion of opening 30. A single bottom loop 41 is provided at the
bottom edge of opening 30. Two sets of lacing studs 42a and 42b are disposed
on each side of the ankle portion of each quarter 26 and 28 at a short distance
from edges 36 and 38 of opening 30. A lace 45 passes through bottom loop 41
and through each side loop 40 in a conventional crisscross fashion. Above the
series of side loops 40, lace 45 is anchored to first and second sets of lacing
studs 42a and 42b, after which, a knot 49 is tied and boot 20 is fully fastened.
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Each side loop 40 comprises an inner portion 46 enclosed in a fabric band 47
which is wrapped around inner plastic portion 46 thereby closing the loop and
preventing lace 45 from exiting side loops 40. Side loops 40 are sewn or
otherwise attached to the interior portion of edges 36 and 38. The interior portion
of side loop 40 where lace 45 is nested consists essentially of a plastic pathway
on which lace 45 is able to slide easily. Side loops 40 are designed to reduce the
lace friction to a minimum to allow the user to tighten the lower portion of boot 20
with a single pulling action on the lace ends. Prior to engaging lace 45 to the first
set of lacing studs 42a, the user grips the ends of lace 45 above the series of
side loops 40 and pulls to tighten the lower portion of boot 20. The low friction
side loops 40 provides a substantially even distribution of the lace tension to
each pair of opposing side loops 40. Once the lower portion of opening 30 is
firmly tightened, the user then simply loops lace 45 around lacing studs 42a and
42b to complete the fastening of skate boot 20.
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Figures 2-6 illustrate a first embodiment of a lacing stud 42 isolated from boot 20.
Lacing stud 42 is a molded plastic piece comprising a central post 50 and a thin
planar anchoring base 52. Post 50 comprises a top portion 51, an intermediate
portion 53 and a lower portion 55. As shown in Figures 1 and 3, lacing studs 42a
and 42b are installed under the layer of material 25 making up the exterior
portion of boot 20, into apertures 27 made in external material 25; apertures 27
having the general shape of the central post 50. Anchoring base 52 of lacing
studs 42a and 42b and the exterior layer of material 25 are sewn together as
depicted by stitching lines 54 and 57; the thickness of anchoring base 52 being
sufficiently thin to allow stitching therethrough. Other means of securing lacing
studs 42 to boot 20 such as riveting or gluing could be used as well. The boot
construction itself may dictate the preferred type of fastening of lacing stud 42 to
the boot. For example, a hard shell skate boot may require rivets to properly
secure lacing studs 42 to the boot. The anchoring portion of lacing studs 42 may
easily be modified to accommodate different types of fastening. The use of rivets
requires a least one hole and preferable a pair of holes to be made in anchoring
base 52 to accommodate the rivets which may then be fastened to the boot.
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Figure 3 is a side elevational view of lacing stud 42 shown with anchoring base
inserted under the exterior layer of material 25 of boot 20. The intermediate
portion 53 of post 50 comprises a curved groove 60 defined by transversely by
an inner side surface 54, an outer side surface 56 and a bottom surface 58
extending between inner side surface 54 and outer side surface 56. Curved
groove 60 extends at least partially around the periphery of post 50 and defines a
neck portion for guiding and slidably retaining a lace engaged therein. Curved
groove 60 is oriented substantially parallel to anchoring base 52 and therefor
parallel to the side of boot 20 when installed.
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Curved groove 60 includes braking means for impeding sliding motion of the
lace. The braking means includes in a specific embodiment, a pair of teeth 62a
and 62b projecting toward one another and protruding from inner side surface 54
and from outer side surface 56 respectively to reduce the dimension of curved
groove 60 thereby restricting the passage of the lace when the latter is engaged
into curved groove 60. The outer side surface 56 further comprises an insertion
restriction in the form of a snapping knob 64 extending across the entry of curved
groove 60 to partially enclose the lace within curved groove 60 such that the lace
must be forced in and out of engagement with lacing stud 42. Knob 64 restricts
the entrance of the lace into curved groove 60 at a single point by reducing the
the distance between the end of knob 64 and inner side surface 54 to a distance
smaller than the lace diameter such that the user must snap the lace into lacing
stud 42 in order to engage groove 60. In use, knob 64 prevents the lace from
unduly disengaging lacing stud 42 yet enable the user to disengage the lace
easily. As shown in Figure 3, knob 64 extends downwardly from outer side
surface 56 and its end restricts entry into groove 60.
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Figures 4 and 5 are cross-sectional views of the interior portion of lacing stud 42
depicting the curved profile of groove 60. As shown in Figure 4, a lace 45 is
illustrated in dotted lines following a generally curvilinear path around a portion of
post 50. The curvilinear profile of groove 60 enable lace 45 to slide unhindered
up to the point where it engages braking teeth 62a and 62b. Tooth 62a (opposite
tooth 62b, Figure 5) is located into the path of lace 45 when the latter is engaged
to bottom surface 58 and is being pulled in the normal direction "P". In this
specific location, teeth 62a and 62b provide the dual function of allowing lace 45
to slide although partially hindered in direction "P" and preventing the sliding
back of lace 45 when the user reduced the exertion of tension on lace 45. Once
the desired tightening of lace 45 is reached, lace 45 is brought across opening 36
of skate boot 20 and in the same motion is brought into contact with the exiting
portion 70 of curved groove 60. Exiting portion 70 may take on a variety of
shapes since it is non-essential and could be removed altogether without
impairing the workings of lacing stud 42.
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Figure 5 illustrates the outer side surface 56 of curved groove 60 with braking
tooth 62b protruding therefrom. As shown, lace 45 engages braking tooth 62b
when lace 45 is being pulled in the normal pulling direction "P". Teeth 62b and
62a (Figure 4) are substantially triangular and feature a leading edge 68 having a
mild inclination to allow lace 45 to slide relatively smoothly in direction "P", and a
trailing edge 67 having a sharper inclination to restrict the sliding motion of lace
45 in the opposite direction. As previously described, knob 64 also protrudes
from outer side surface 56 and partially prevents the disengagement of lace 45
from locking stud 42.
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Figure 6 illustrates lacing stud 42 viewed from the back of the boot with an arrow
"P" showing the normal upward lace tightening direction. As can be seen, the
profile of tooth 62a is substantially triangular with a leading edge 68 having a mild
inclination to allow the lace to slide relatively smoothly in direction "P" and a
trailing edge 67 having a sharp inclination which restricts the motion of the lace in
the opposite direction. The profile of tooth 62b is a mirror image of tooth 62a as
best seen in Figures 4 and 5. The general shape of teeth 62a and 62b requires
the user to exert on the lace ends a pulling force which exceeds the force
necessary for tightening the footwear by an amount of force at least superior to
the force necessary to overcome the restriction of teeth 62a and 62b against the
sliding motion of lace 45 in the direction "P". When the pulling force is reduced
and the lace brought transversely across opening 36 as shown in Figure 1, the
lace is restricted from sliding back through curved groove 60 by the sharper
trailing edges 67 of teeth 62a and 62b.
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Referring back to Figure 1, when the user engages lace 45 to lacing studs 42a
on each side of boot 29, the user exerts a pulling force on the ends of lace 45 in
the direction "P" corresponding to the normal upward lace tightening motion
when he or she is wearing boot 20. Lace 45 is therefor engaged to curved
groove 60 which is provided with braking means in the shape of teeth protruding
from the inner and outer side surfaces of curved groove 60 as previously
described, while lace 45 is being pulled in the normal upward pulling direction
"P". The braking means impedes the sliding motion of lace 45 yet allows lace 45
to be pulled upward in the direction "P" such that boot 20 may be tightened.
However if and when the user releases the tension on lace 45, lace 45 is
refrained from sliding back through curved groove 60 by the braking means
located in the lace path. The user may therefore tighten lace 45 while engaged
to lacing studs 42a and then bring lace 45 transversely across opening 36 to the
other side in a normal crisscross fashion while exerting very little tension on lace
45 since lace 45 is restricted from sliding back by the braking means. Each lace
end is then brought transversely across opening 36 to reach the upper lacing
studs 42b and in a similar fashion, lace 45 is pulled in the normal upward lace
tightening direction "P" for further tightening of the ankle portion 24 of boot 20.
The user may then complete knot 49 without having to maintain a substantial
tension on the lace end.
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When fastening a boot featuring standard lacing hooks, the user normally
transfers each lace ends to the other hand and must maintain the tension on the
lace while doing so. If tension must be maintain on each lace end, the hand
transfer is somewhat awkward however if lace 45 is prevented from sliding back
by a lacing device such as lacing studs 42a or 42b, the user may leisurely
transfer each lace end to the other hand when fastening the upper portion of boot
20.
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Lacing studs 42 enable the user to tighten lace 45 in a single step or pulling
action without having to, as a second step, bring lace 45 into engagement with
some locking portion. Lace 45 being already engaged to the braking means
when the user is pulling on the lace ends along the normal upward pulling
direction "P", lace 45 is restricted from sliding back through lacing stud 42 without
requiring the user to lock the lace as a second step to the pulling action. This
simplifies the overall tightening operation of a boot.
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Figures 7 to 10 illustrate a second embodiment of a lacing stud according to the
invention. In Figure 7, a lacing stud 80 is shown having a substantially circular
post 82 and a thin planar anchoring base 84 for the purpose of securing lacing
stud 80 to the exterior layer of material of a skate boot as previously described.
Post 82 generally comprises a top portion 51, an intermediate portion 53 and a
lower portion 55. The intermediate portion 53 of post 82 comprises a curved
groove 83 generally parallel to anchoring base 84 and extending at least partially
around the periphery of post 82. Curved groove 83 defines a neck portion for
guiding and slidably retaining a lace engaged thereto. Curved groove 83 is
defined transversely by an inner side surface 90, an outer side surface 92 and a
bottom surface 94. Curved groove 83 comprises three braking teeth 85, 86 and
87 as braking means to restrict the sliding motion of a lace engaged thereto.
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Anchoring base 84 is illustrated as completely surrounding post 82. However,
anchoring base 84 may extend only partially around post 82. Indeed anchoring
base 84 may extend on the side of curved groove 83 such that the extension of
anchoring base 84 provides a retaining force to lacing stud 80 which
counteracting the pulling force in the direction "P" and the lace tension once the
boot is fastened.
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As shown in Figure 8, a first braking tooth 96 having a substantially triangular
profile protrudes from outer side surface 92, its leading and trailing edges having
substantially the same angle. A second braking tooth 97 and a third braking
tooth 98 protrude from inner side surface 90 and are disposed one on each side
of the opposing first braking tooth 96 thereby creating a braking zone in curved
groove 83 of lacing stud 80. The braking zone portion has reduced dimension for
restricting the passage of a lace 45 when the latter is engaged into curved
groove 83 and is bearing against bottom wall 94. As shown in Figures 8 and 10,
the three braking teeth 96, 97 and 98 are positioned such that they engaged lace
45 when the user is pulling lace 45 in the direction "P".
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As shown more specifically in Figure 8, braking teeth 96, 97 and 98 form a
braking zone in which lace 45 must snake its way through causing restriction of
the sliding motion of lace 45 and partially blocking lace 45. Second braking tooth
97 and third braking tooth 98 feature a generally triangular profile. First braking
tooth 96, which is disposed opposite second and third braking teeth 97 and 98,
also has a substantially triangular profile and is positioned half way between
second and third braking teeth 97 and 98. The combination of teeth 96, 97 and
98 forms a restriction into curved groove 83 which impedes sliding motion of lace
45. The braking zone of lacing stud 80 thereby enables the user to tighten his or
her boot in a simple and convenient single step procedure that requires only to
pull in a normal upward direction "P" prior to crossing the lace to the following
lacing stud 80 or completing the knot.
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As shown in Figure 9, braking tooth 96 together with opposing braking teeth 97
and 98 reduce the dimension of curved groove 83 such that a normal lace is
squeezed by teeth 96, 97 and 98 and is restricted from freely sliding once
engaged to lacing stud 80. As shown specifically in Figures 9 and 10, lacing stud
80 is provided with a marker 100 protruding from lower portion 55 of post 80.
Marker 100 is a reference point during installation and positioning of lacing stud
80 onto a boot. Since lacing stud 80 has a circular configuration, it may be
installed improperly on a boot. To avoid this eventuality, marker 100 is
positioned opposite curved groove 83 such that during installation, marker 100
must be oriented facing the opening 36 of boot 20 (fig.1). Advantageously, the
circular configuration of lacing stud 80 as well as the symmetry in the teeth
pattern permits lacing stud to be mounted on either side of a boot opening.
Whether installed on the right side or the left side of the boot's opening, marker
100 simply has to be oriented toward the boot's opening to ensures that curved
groove 83 is oriented away from the opening so that it can perform properly on
either side. In the proper orientation, lacing stud 80 provides the dual function of
allowing lace 45 to slide, although partially hindered in direction "P", and
preventing the sliding back of lace 45 when the user reduces the pulling tension
on the ends of lace 45. Once the desired tightening of lace 45 is reached, the
user brings lace 45 across the boot's opening using only minimal force on the
lace ends.
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In the specific embodiment illustrated in Figures 7-10, the overall shape and
configuration of teeth 96, 97 and 98 requires the user to exert on the lace ends, a
pulling force in the direction "P" which exceeds the force necessary to overcome
the restriction of teeth 96, 97 and 98 against the sliding motion of lace 45 in order
to tighten lace 45. In this embodiment however, the sliding restriction of lace 45
caused by teeth 96, 97 and 98 is identical in both directions due to the
symmetrical disposition of teeth 96, 97 and 98. As previously described, when
the pulling force on the lace ends is reduced, the lace is restricted from sliding
back through curved groove 83 by teeth 96, 97 and 98, therefore easing the
handling of lace 45 when it is brought transversely across opening 36 (Fig. 1) of
boot 20 to either complete the knot or to engage the following lacing stud 80
disposed across boot 20.
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In each embodiment of lacing studs 42 and 80, the braking means is shown as
being positioned substantially parallel to the normal upward lace tightening
direction "P". However it is understood that the braking means may be
positioned at any point within curved grooves 60 or 83 which is engaged to lace
45 when the latter is being pulled along direction "P". For example, the braking
means of curved grooves 60 or 83 may be located in a position preceding the
segment of curved grooves which is parallel to the normal upward lace tightening
direction "P" illustrated in the Figures. Lacing studs 42 or 80 would still perform
their function of braking lace 45 and preventing its sliding back motion such that
the user does not have to insert lace 45 into a lace blocking area. Lacing studs
42 and 80 simultaneously allow the user to tighten lace 45 while providing
adequate braking to prevent lace 45 from sliding back through curved groove
when the tension is reduced on lace 45.
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The above description of preferred embodiments should not be interpreted in a
limiting manner since other variations, modifications and refinements are
possible within the spirit and scope of the present invention. The scope of the
invention is defined by the appended claims and their equivalents.