U.S. patent number 3,636,642 [Application Number 04/867,493] was granted by the patent office on 1972-01-25 for ski boot.
Invention is credited to Helmut Walther.
United States Patent |
3,636,642 |
Walther |
January 25, 1972 |
SKI BOOT
Abstract
A ski boot provided with an external reinforcing structure which
permits forward bending of the leg relative to the foot of the
wearer, i.e., the normal movement carried out during skiing, said
reinforcing structure being removable to permit the boot to be made
of softer material than that normally used for ski boots so that
the ski boot when used for walking without the reinforcing
structure affords the same convenience to the wearer as a normal
shoe for walking.
Inventors: |
Walther; Helmut (Saluggia,
Vercelli, IT) |
Family
ID: |
25349887 |
Appl.
No.: |
04/867,493 |
Filed: |
October 20, 1969 |
Current U.S.
Class: |
36/117.4;
36/118.2 |
Current CPC
Class: |
A43B
5/0415 (20130101) |
Current International
Class: |
A43B
5/04 (20060101); A43b 000/00 () |
Field of
Search: |
;36/2.5R,2.5AL,7.5 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lawson; Patrick D.
Claims
I claim:
1. In a ski boot haVing an external reinforcing structure formed of
four elements connected in pairs by means of hinges located at the
ankles of the wearer and each pair of elements forms a frame
extending from the top of the ski boot to the sole, embracing the
latter with its narrow ends connected to each other, the
improvement wherein the four elements forming the frame are kept in
position by a plurality of straps connected thereto, surrounding
the ski boot and provided with hook means for tightly closing the
ski boot and keeping the articulated elements in place.
2. A ski boot as claimed in claim 1, wherein the four elements
forming the frames are connected by a plurality of forward and
rearward straps and the forward straps extend downwardly around the
sole and are connected to each other and to the narrow ends of the
frames by a strap for reinforcement of the sole, extending along a
generally central longitudinal line of the sole.
3. A ski boot as claimed in claim 1, wherein the sole is provided
with transverse and longitudinal grooves receiving the straps below
the sole.
4. A ski boot as claimed in claim 1, wherein the straps are
connected to form a network.
5. A ski boot as claimed in claim 1, wherein the straps are
provided with weight-reducing holes.
Description
This invention relates to a ski boot provided with an external
reinforcing structure which permits forward bending of the leg
relative to the foot of the wearer, i.e., the normal movement
carried out during skiing.
It is known that the conventional ski boots must possess sufficient
rigidity and therefore be made of sufficiently hard material
because of the need to render the boot rigid to transverse
movements and the sole of the boot must be rigid as well. Thus
these ski boots have the disadvantage of being too rigid to permit
easy forward bending of the leg.
Many attempts have already been made to eliminate this disadvantage
and to make the instep of the ski boot flexible in a forward
direction, but up to date no satisfactory result has been
obtained.
It is the object of the present invention to eliminate this
disadvantage by providing a ski boot having an external reinforcing
structure which can be removed to permit the ski boot to be used
for walking in streets as with normal walking shoes.
In other words, the ski boot according to the invention is made of
relatively soft but perfectly watertight and snowtight material to
permit the foot to be moved easily in all directions, the ski boot
being enclosed by a reinforcing structure which can be secured
thereto when the wearer intends to go skiing and the reinforcing
structure being articulated at the ankles to permit the wearer to
bend the boot forwardly but prevent lateral movements.
The reinforcing structure itself consists of four metal elements
connected in pairs by means of hinges located at the position of
the ankles, each pair of elements forming a small frame extending
from the top of the boot to the sole thereof and embracing the
latter with its narrow ends connected with each other, the four
elements forming the frames being kept in position by a plurality
of straps of plastic material connected thereto, surrounding the
boot and provided with hook means for tightly closing the boot and
keeping the articulated elements in place.
Conveniently the front straps extend downwardly around the sole and
are connected with each other and with the narrow ends of said
frames by a metal strap extending in the longitudinal central
portion of the sole so as to keep the latter rigid during
skiing.
A preferred embodiment of the invention will now be described by
way of example and with reference to the accompanying drawings, in
which:
FIG. 1 is a side view of a ski boot according to the invention,
provided with a reinforcing structure, as seen from the inner
side;
FIG. 2 is a side view of the same ski boot from the outer side;
FIG. 3 is a rear view thereof, and
FIG. 4 is a plan view thereof as seen from below.
Referring to FIG. 1, the ski boot is formed of the usual uppers A
and sole B and is made of a suitable soft material so that the boot
is not rigid as the usual ski boots and when its reinforcing
structure has been taken off it can be used as a normal shoe for
walking.
The boot is provided with a reinforcing structure formed of four
metal elements 1, 2 and 1', 2' connected together in two similar
pairs by hinges 3, 3' so that the elements 1, 1' can rotate
relative to the elements 2, 2'. The hinges 3 and 3' are located on
the sides of the uppers in the exact position of the ankles. Each
pair of the elements forms a small frame that runs from the top of
the uppers A to the sole B, embracing the latter with its narrower
ends 4 and 4' which are connected to each other.
The four elements 1, 2 and 1', 2' forming the two frames are kept
in position by a plurality of plastic straps 5, 6, 7 and 8 secured
thereto. The straps 5 and 6 embrace the rear portion of the uppers
A while the straps 7 and 8 embrace the vamp on the instep of the
foot. The straps 7 and 8 are provided with hooks 9 for tightly
closing the boot and for keepIng the articulated elements in
place.
The front straps 8 extend downwardly around the sole B and are
connected at the narrow ends of the frames by a metal strap 11
extending below the sole along the centerline thereof so as to make
the sole rigid when using the skis.
For this purpose grooves are provided in the sole B to receive the
straps 8 and 11 and the ends 4, 4' of the elements 2, 2' to ensure
that the straps will remain in alignment with the outer surface of
the sole.
Although only "straps" have been described in the present
specification it is obvious that these "straps" may be connected to
form branches or a network. Also the straps may be provided with
weight-reducing holes 10 and the materials used may be different
from what has been described and illustrated without departing from
the scope of the invention.
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