U.S. patent number 3,755,926 [Application Number 05/248,979] was granted by the patent office on 1973-09-04 for snowshoe harness.
Invention is credited to David M. Schonbrun.
United States Patent |
3,755,926 |
Schonbrun |
September 4, 1973 |
SNOWSHOE HARNESS
Abstract
A snowshoe harness fabricated substantially of flexible
lightweight material with the exception of buckles and the like
wherein the wearer's boot is securely held in position. The
securement of the boot is accomplished without placing a
compressive force upon the toes and thus impairing circulation. The
flexibility of the material allows the harness to be secured to a
relatively fixed portion of the snowshoe and still allow the
harness to pivot relative to the shoe, while at the same time
providing a continual bias or torsion bar effect tending to return
the wearer's boot to proper contact with the snowshoe.
Inventors: |
Schonbrun; David M. (Seattle,
WA) |
Family
ID: |
22941525 |
Appl.
No.: |
05/248,979 |
Filed: |
May 1, 1972 |
Current U.S.
Class: |
36/125 |
Current CPC
Class: |
A63C
13/001 (20130101); A63C 13/005 (20130101) |
Current International
Class: |
A63C
13/00 (20060101); A43b () |
Field of
Search: |
;36/2.5R,2.5AB |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lawson; Patrick D.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are defined as follows:
1. A harness for use upon a snowshoe having a rigid encircling
frame member comprising:
a toe portion having a front, sides and a bottom to cradle the toe
of a wearer's boot,
first strap means of single adjustable length for passing around
the heel of the wearer's boot, secured to the toe portion and
extending laterally outwardly therefrom on both sides for
securement to the snowshoe adjacent the side frames, said strap
means permitting the boot to be secured against the front of the
toe portion preventing relative movement therebetween without
placing an encircling pressure upon the wearer's foot, the
tightness of the strap determining the tension upon the laterally
outwardly extending portions,
second strap means secured to the first strap means and configured
to encircle the boot upper, holding the first strap means fixed
relative to the boot assuring that the boot will be retained within
the harness whereby the wearer retains complete control of the shoe
but does not incur excess weight, the harness being flexible and
versatile and readily adjustable to any size or shape of boot
and
the foot of the wearer is not subjected to a compressive pressure
which reduces circulation and increases the probability of
frostbite and yet the lateral control of the shoe is greatly
increased.
2. A harness as in claim 1 wherein the first strap means is a
single elongated strap which is secured to the toe portion which
allows longitudinal movement of the strap relative to the toe
portion but prevents lateral relative movement thereof.
3. A harness as in claim 2 wherein the first strap means is secured
to the toe portion upon each side and again at the bottom of the
toe portion thereby preventing relative movement when the strap
portion is fastened.
4. A harness as in claim 1 wherein the toe portion is adjustable to
discrete positions to permit a securement and cradling of the toe
portion and prevent the possibility of a too tight lace which could
result in impaired circulation and frost bite.
5. A harness for use upon a snowshoe comprising a toe piece for
securing the toe of a boot to the snowshoe without applying an
encircling compressive pressure, a unitary main strap means secured
to the sides of the toe piece and in a continuous loop, extending
outwardly generally normal to the direction of travel and passing
around a fixed portion of the snowshoe which generally parallels
the direction of travel at opposite sides of the snowshoe and then
about the heel of the boot to form a triangular securement which
allows pivotal movement of the boot relative to the shoe and
provides widely spaced attachment enhancing lateral control.
6. A harness as in claim 5 and further including an instep strap
secured to the main strap and encircling the boot to fixidly secure
the main strap means relative to the boot.
Description
BACKGROUND OF THE INVENTION
Snowshoes comprising a frame enclosing an area which is
criss-crossed with a lacing of rawhide or other material are well
known in the art. Harnesses are required to secure the user's boots
to the snowshoes so he will have control of them at all times both
on a level surface and while traveling over sloping terrain.
In walking on snowshoes, the wearer needs to lift the front end of
the snowshoe at the start of a step and move the snowshoe forward.
At the end of each step the front end of the snowshoe is lowered
again and the user's foot pivots forwardly on the ball of the foot
causing the heel of the user's boot to be lifted from the snowshoe
surface i.e. upwardly from the lacing, as the user advances the
other snowshoe to its forwardmost position. As the user's boot is
pivoted forwardly, the toe of the boot is somewhat tilted
downwardly into an opening normally provided in the lacing for this
purpose.
Since snowshoes are used on sloping terrain as well as on the level
a satisfactory harness must provide complete and continuous control
of the snowshoe at all times, both for travel on the level and on
inclines, including side slopes. When used on an incline sloping
laterally of the direction of travel the strain on the harness is
severe. The heel of the user's boot tends to swing in the direction
of the downward slope and if this occurs the control of the
snowshoe decreases and so it is imperative that the wearer be able
to control lateral movement of the heel portion.
Snowshoe harnesses of the prior art have been unsatisfactory,
failing to provide continuous control. The prior art includes
harnesses comprising flexible straps which are unsatisfactorily
designed for the reason noted above, and harnesses which employ a
rigid U-strap intended to fit forwardly along the sides of the
user's boot in addition to extending around the heel. Such
U-members have been found to be inadequate to withstand the
torsional strain to which they are subjected when the user is
crossing an incline sloping transversely of the direction of
travel. The pressure of the boot against one side of a rigid
U-member when traversing an incline is very tiring and causes wear
on the side of the boot.
Other prior art harnesses particularly those of Harold Howe, U.S.
Pat. Nos. 2,821,031, 2,987,834, 3,000,117, 3,060,600 and No. Re.
25,472 have embodied the principal of holding the heel of the boot
rigid by either a flexible means, 2,821,031, or a rigid means as
taught in the other references.
Another of the problems with the prior art harnesses is the width
of snowshoe which is necessary to provide the rigid structure
necessary for the Howe approach to the problem. After many hours on
the shoe the straddle leg position becomes extremely tiring and
therefor is a definite drawback of this type of harness.
It is an object of the present invention to provide a snowshoe
harness which is capable of providing complete and continuous
control of the snowshoe and yet is extremely lightweight and
versatile.
Another object of the present invention is to provide a snowshoe
harness which is adaptable to any size boot as well as to any
snowshoe, such that it may be readily and rapidly interchanged
between users and snowshoes.
Still another object of the present invention is to provide a
snowshoe harness wherein the user's boot is held firmly in position
providing proper control and yet there is no compressive force upon
the foot of the user and thus does not squeeze the foot which would
cause a decrease in circulation and thus increase the possibility
of frost bite.
Yet another object of the present invention is to provide a
snowshoe harness wherein the boot is held within the harness and
the harness is held in position on the snowshoe by one continuous
strap means such that the control of the shoe is partially a
function of the degree of tightness to which the strap is secured.
Further, the stress generated during use of the shoe is transmitted
from the back of the boot to the snowshoe or vice versa tending to
increase the tension and preventing further relative movement.
Yet another object of the present invention is to provide a
snowshoe harness wherein the attachment of the harness to the
snowshoe allows pivotal movement of the boot and harness about a
horizontal axis at the point of attachment and yet continuously
provides a bias to return the boot and shoe to proper contact
position supplying a torsion bar effect greatly improving the
control.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing the inventive harness as
secured to a snowshoe with a boot shown in phantom.
FIG. 2 is a side view of the inventive harness showing the relative
relationship of the boot, the harness and the snowshoe.
FIG. 3 is a partial view showing the interconnection between the
harness and the shoe itself.
DETAILED DESCRIPTION OF THE DRAWINGS
As can be seen in FIG. 1 the harness is adapted to be used upon a
snowshoe having an outer frame 2 which may be made of ash, plastic
or any other suitable lightweight durable material. The space
between the sides of the frame is filled by webbing 4 which
generally will be secured to the side rails of the frame 2 as well
as one or more cross bars 6 to add stability to the webbing. As can
be seen in FIG. 1 the webbing includes an opening or space at the
front end of the shoe defined by the frame 2 cross bar 6 and toe
cord 8. The webbing, braces and frame allow the wearer to walk on
top of deep snow without significantly sinking into the snow.
The harness itself, as can be seen in the FIGS. comprises, when
flat a toepiece 10, which is of unitary construction having a pair
of opposite ears 12 and a forwardly extending tongue 14. As can be
seen in the Figure when the harness is assembled the tongue 14 is
bent rearwardly to underlie the outermost portion of the ears 12
which are secured about the toe of the boot. It is to be noted that
the ears 12 and the tongue 14 all have eyelets 16 therein, said
eyelets being so placed that when assembled they will be axially
aligned when secured. The placement and cooperation of the holes in
the ears 12 and tongue 14 is critical to the proper operation of
the present harness in that when these elements are properly
secured, the wearer's boot is held against movement within the
harness and there is no compressive pressure upon the wearer's
boot. As seen in FIG. 1 the toe piece when assembled has ears 12
overlying the tongue 14 and a cord 18 is threaded therethrough to
assure that the ears 12 remain in constant relative position with
respect to each other as well as to the tongue and thus does not
impair circulation in the wearer's foot.
The toe piece 10 is secured in position upon the snowshoe and the
boot of the wearer is secured to the toe piece by means of a
unitary continuous strap 20 which extends about the heel of the
boot 22 and then forwardly on opposite sides of the boot to pass
inwardly through a generally vertical slot 24 in toe piece 10 and
then outwardly again through a generally vertical slot 26. The fact
that the strap 20 extends through the two generally parallel slots
24, 26 tends to retain the strap in a generally vertical
orientation, that which it must assume when passing around the heel
of the boot and causes a frictional interlock between the strap and
the harness. The strap 20 then twists through approximately
90.degree. and extends laterally outwardly, as best seen in FIG. 3,
and passes through a metallic stabilizing ring 28 prior to passing
over a portion of the webbing or other stable horizontal element 30
of the snowshoe itself. The strap 10 then passes again through the
stablizing ring 28 and passes through a generally horizontal slot
30 in the bottom of toe piece 10, passes across the upper inner
portion of the toe piece and out through a slot corresponding to
30. The strap 20 generally follows the same path as hereinabove
described to again return about the heel of the boot. The strap 20
has a quick release buckle 32 which allows not only rapid
attachment and release of the snowshoe but further allows the
wearer to provide adequate tension in the strap as to be described
hereinafter.
A second strap 34 is provided which has transverse slots 36, 38
therein. The strap 20 passes through slots 36 and 38 and strap 34
is passed around the instep of the boot 22 and over the upper
portion of the boot to be secured in place by the rapid release
buckle 40. The strap 34 serves to retain the strap 20 in
appropriate position and thus allows the wearer to have proper
security.
The preferred material used for the hereinabove described harnesses
is poromeric and is waterproof, fungus proof, rodent proof and is
non-elastic thus assuring proper fit and constant securement even
under adverse conditions. As can be seen in FIG. 2, when the boot
is properly placed within the harness it will be urged forwardly
into the toe piece so that the toe of the boot contacts the tongue
14. The strap 20 is then pulled tightly about the heel of the boot
holding the boot in position and preventing forward and rearward
movement of the boot. It is to be noted, however, that since the
ears 12 are secured to the toe piece 14 in such a manner that there
is no circumferential pressure on the toes there is no danger of
impaired circulation and frost bite.
The wearer secured strap 20 putting a significant amount of tension
thereon and this tension passes the entire length of the strap 20
and puts an equivalent amount of tension upon the outwardly
extending portions of strap 20 which pass through the rings 28 and
then around a portion 30 of the snowshoe itself. This strain tends
to pull the strap 20 into a uniplanar configuration and the greater
the tension placed upon the strap 20 the more bias is placed into
the outwardly extending ears as shown in FIG. 3.
As can be seen in FIG. 3 the strap 20 goes from the vertical
configuration around the heel to the generally horizontal
configuration whereat it passes and is connected to the snowshoe.
This placement of strap 20 involves a twisting of the material and
the tension once placed upon this portion makes the outwardly
extending portion as seen in FIG. 3 act in the same fashion as a
torsion bar assuring constant proper control of the snowshoe. The
tension upon strap 20 also prevents the harness from moving
relative to the shoe since the tension places a strong frictional
force upon the toepiece where the strap 20 passes therethrough
preventing lateral movement thereof and as can readily be seen the
portion of the strap 20 which extends between the sides of frame 2
prevents forward and rearward movement of the harness relative to
the snowshoe.
Once the wearer has properly secured within the harness he is
capable of rapidly and easily moving the shoe in the rocking motion
necessary for travel and yet is not subjected to undue fatigue
because of excess weight.
* * * * *