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Патент USA US3039792

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June 19, 1962
J. A. LEE
3,039,782
SKI BINDING WITH SAFETY RELEASE
Filed Aug. 6, 1959
2 Sheets-Sheet 1
‘mm
mm
June 19, 1962
J. A. LEE
3,039,782
SKI BINDING WITH SAFETY RELEASE
Filed Aug. 6, 1959
2 Sheets-Sheet 2
%»Q£
INVEN TOR.
United States Patent O? ice
3,039,782
Patented June 19, 1962
1
2
3,039,782
rigidly fastened to ski blade 12 by means of four screws
SIG BINDING WITH SAFETY RELEASE
John A. Lee, 4906 Northwest Highway, Dallas, Tex.
Filed Aug. 6, 1959, Ser. No. 832,021
4 Claims. (Cl. 280—11.35)
This invention relates to ski bindings and more par
ticularly to a safety binding to provide for disengagement
of the ski boot from the ski blade so that forces or mo
ments applied to the ski Will not result in injury to the
skier.
In the activity of skiing, forces may be applied between
26, 27, 28, and 29 passing through the plate 23. The
journal is provided with slot, or keyway, 31. The jour
nal is also provided with shoulder 32 at its upper portion.
Bearing 16 is provided with integral tongue 33. The
tongue 33 is provided with shaft receiving means 35. The
bearing is fastened to key holder 18 by means of screws
36 and 37 passing through the key holder 18. Key holder
18 is provided with slot, or keyway, 40. The bushing 19
and the washers 20 and 21 are made of a material such
as Te?on and are positioned as illustrated in order to re
duce friction between journal 15 and bearing 16 and be
tween bearing 16 and plate 23 upon rotation of these
elements with respect to each other.
foot and leg of the skier through the ski boot. Devices 15
In normal position, slot 31 in journal 15 and slot 40
have been constructed and incorporated into ski bindings
in key holder 18 are in line with each other. In these
for the purpose of releasing the boot from the ski when
slots, in line with each other, is key 22. Cylindrical cap
pressures and moments reach some predetermined maxi
41 rests on shoulder 42 at the upper part of bearing 16
mum. Existing release mechanisms have not proved re
and is held in place by spring 43. The cylindrical cap
the ski and the snow or objects in the snow which result
in excessive forces or moments being transmitted to the
liable in releasing consistently under the desired condi~
tions. It is an object of this invention to provide a bind
ing which will reliably release.
In a forward fall by a skier excessive bending stresses
serves to protect the release mechanism 14 from con
tamination by snow and Water and to retain the key 22
in position in slots 31 and 40.
Referring to FIGURE 2, yoke 50 is provided with arms
may occur in the legs or ankles of the skier if means are
51 and 51'. These arms have cable receiving means 53
not provided for releasing the ski boots from the ski 25 and 53’ at their extremities into which the ends of cable
blades. One object of this invention is to provide a bind
55 are threaded and secured as by soldering to washers 56.
ing which will hold the ski boot in place under normal
Cable 55 is ‘designed to ?t into groove 57 of the boot
skiing conditions but will release the ski boot from the ski
heel, such grooves being a standard feature of ski boots.
blade when an excessive upward force is applied by the
At the opposite end of the yoke 50 from the cable, arms
boot to the binding. This object contemplates a weak 30 58 and 58’ extend on either side of the tongue 33 and
link in the form of a rupture key which is designed to fail
receive shaft 60 which is keyed to tongue 33 by means of
at a predetermined pressure and allow the binding to pivot
taper pin 61. A collar 62 is secured to one end of shaftv
up and away from the boot thus releasing the boot from
60 by taper pin 63.
the ski blade.
Referring again to FIGURE 1, collar 62 is provided
Another object of the invention is to provide a heel re
with slot, or keyway, 65 and the yoke 50 is provided with
lease Which operates to free the boot from the ski blade
slot, or keyway, 66. In normal operation slot 66 in yoke
when excessive forces or moments occur parallel to the
50 and slot 65 in collar ‘62 are in line with each other.
plane of the ski blade. A weak link in the form of a
In these slots, in line wtih each other, is key 67 which is
rupture key is contemplated as this object so that when
retained in place by spring clip 68.
predetermined forces are reached the key ruptures allow
Still referring to FIGURE 2, a toe clamp assembly 70
ing the boot heel support to swing parallel to the plane
is shown. This assembly is of conventional design and
of the ski blade thus releasing the boot from the binding
is fastened to the ski blade and in normal operating po
to the ski blade.
sition serves to hold the toe of the boot B to the ski blade
Yet another object of the invention is to provide a toe
and at the same time force the boot B back against the
release similar in construction and operation to the above
cable 55. The cable 55 then serves to hold the heel of the
described heel release to release the ski boot from the ski 45 ski boot to the ski blade.
blade upon the application of excessive force or moments
in a plane parallel to the ski blade.
FIGURE 1 is a vertical view of a heel binding and re
lease mechanism along the line 1—-1 of FIGURE 2.
FIGURE 2 is a plan view of the heel binding and re
lease mechanism.
FIGURE 3 is a horizontal sectional view along the line
3—3 of FIGURE 1.
FIGURE 4 is a vertical view along the line 4-4 of
FIGURE 5.
FIGURE 5 is a plan view of a toe binding and release
The exertion of excessive vertical load on the cable, as
in a forward fall of the skier, tends to make yoke 50 rotate
about shaft 60. Rotation is prevented by key 67 until
50 the vertical load reaches :a predetermined maximum which
causes the key to rupture and allows the yoke to rotate
about shaft 60 thus releasing the boot heel from the cable
and thereby releasing the boot B from the ski blade. The
yoke 50 can be reset by realigning slots 65 and 66 and
inserting a new key 67. The key 67 can be made of
metal, plastic, wood, or other suitable material. The
dimentions from the center of shaft 60 to key 67 and to
mechanism.
cable 55 provide a mechanical advantage so that varia
FIGURE 6 is a vertical view along line 6—6 of FIG
tions in the cross sectional :area of key 67 will have a
URE 7.
minimum effect on the vertical load required ‘at cable 55
FIGURE 7 is a plan view of an alternate design for 60 to effect rupture of key 67.
the release mechanism for either the toe release in FIG
Side thrusts parallel to the plane of the ski blade against
URE 4 or the heel release in FIGURE 1.
the yoke 50 by the boot heel 11 transmit a torque through
Referring to FIGURE 1 the heel binding thereof is in
the tongue 33 of bearing 16 and tend to rotate the bear
dicated generally by the numeral 10 and illustrated in po
ing 16 about the journal 15. Rotation is prevented by
65
sition attached to boot heel 11 and ski blade 12. The
the key 22 until the torque is su?‘icient to exert a prede
numeral 14 designates a release mechanism assembly.
termined rupture pressure on the key 22 which then per
The release mechanism assembly 14 includes journal 15,
mits the yoke 50 to rotate about journal 15 and releases
bearing 16, key holder 18, bushing 19, washers 20 and
the ski boot from the ski blade. The dimensions from
21, and key 22.
the center of the journal 15 to key 22 and to the point of
Journal 15 is rigidly fastened to plate 23 by means of 70 contact between the boot heel 11 and yoke 50 provide a
screws 24 and 25 passing through plate 23. Plate 23 is
mechanical advantage so that variations in the cross sec
3,039,782
'
3
tional area of the key 22 will have a minimum effect on
the total force required between the boot heel 11 and the
yoke 50 to cause rupture of the key 22. The key 22 may
be made of metal, plastic, wood, or other suitable mate
rial.
'
, Referring to FIGURES 4 and 5, another embodiment
of the invention comprises a toe release assembly gen
mechanism bearing 16 is turned by hand about journal 91
until slot 105 in key holder 92 is in line with slot 98 in
journal 91. Key 95 is then advanced by spring 94 until
the end opposite from the spring strikes the beveled stop
102. The right segment of the' key 95, as viewed in
FIGURE 6, which was separated by the above described
rupture is displaced to the right in groove 98. The above
sequence of rupture and reset can be repeated until key
95 is of insufficient length to bridge the gap between slot
attached to ski blade 12 and boot toe 81. The numeral
14' designates a release mechanism assembly which is 10 105 in key holder 92 and slot 98 in journal 91.
erally designated by the number 80 and shown in position
identical in construction with release mechanism assembly
14 previously described and shown in FIGURES 1 and 2
except that the bearing 16 has been modi?ed to provide
As a speci?c example, the keys 22, 67, and 95 might
have a cross section of 1/s" x 1A" with a shearing strength
of 100 pounds. With a mechanical ‘advantage of 10:1
the corresponding force at the heel or toe to produce the
an integral toe piece 82 designed to hold the toe of the
boot 81 in position on the skil blade 12. A toggle assem 15 above force would be 10 pounds.
Having thus described my invention, it will be under
bly 85 and cable 86 of a dmign commonly used in ski
stood that such description has been given by way of illus
bindings is shown and provides a means of holding the
tration and example only and not by way of limitation,
ski iboot B in operating position on the ski blade 12 and
reference for the-latter purpose being had to the appended
against the toe release assembly 80. Moments parallel
to the plane of the ski blade created by pressure from 20 claims.
I claim:v
the toe of the boot 81 against the toe piece 82 tend to
1. A ski binder mounted on a ski blade for releasably
cause toe piece 82 to rotate about the journal 15. Rota
securing a ski boot to said ski blade comprising in com
tion is prevented by the key 22 until the predetermined
bination a journal mounted on said ski blade, means com
force is exerted to rupture key 22 allowing the toe piece
82 to rotate and thereby releasing the toe of the boot 81 25 prising a keyway within said journal, a bearing rotatably
mounted on said journal for movement in a plane parallel
and allowing ski boot‘B to be released from the ski blade.
to the plane of said ski blade, means comprising a keyway
The dimensions from the point of contact between the
within said bearing adapted for alignment with said means
boot toe 81 and toe piece 82 to the center of journal 15
comprising a keyway within said journal, a key within
and key 22 provide a mechanical advantage so that varia
said keyways in alignment with each other capable of
tions in the cross sectional area of the key will have a 30
rupture upon imposition of a predetermined torque upon
minimum effect on the force required at the contact point
said journal, a tongue integral with said bearing, a shaft
between toe piece 82 and boot toe 81 to cause rupture.
?xedly mounted on said tongue, a yoke rotatably mounted
Referring to FIGURES 6 and 7, another embodiment
on said shaft for movement in a plane perpendicular to said
of the invention comprises a release mechanism assembly
ski blade and adapted for engaging a ski boot, means com
90 which can be used interchangeably with release mecha
prising a keyway within said yoke, means comprising a
keyway immovably associated with said shaft adapted for
alignment with said means comprising a keyway within
said yoke, and a key within said last-named keyways in
bushing 19, plate 23, key holder 92, spring 94, key 95,
40 alignment with each other capable of rupture upon im
cover plate 96, and stop plate 97.
position of a predetermined torque upon said tongue.
Journal 91 is rigidly fastened to plate 23 by means of
2. A ski binder mounted on a ski blade for releasably
screws 93 and 93' passing through plate 23. Plate 23
securing a. ski boot to said ski blade comprising in com
nism 14 and 14' previously described.
The release mechanism assembly is indicated generally
by the numeral 90 and includes a journal 91, bearing 16,
is secured to the ski blade 12 by screws 28 and 29 passing
bination a journal mounted on said ski blade, means com
through'plate 23. Journal 91 is provided with slot, or
prisingr a keyway within said journal, a bearing rotatably
45
keyway, 9-8 in its upper part and shoulder 99. The stop
mounted on said journal vfor movement in a plane parallel
plate 97 is fastened to journal 91 by means of screws 100
to the plane of said ski blade, means comprising a keyway
and 100’ passing through stop plate 97. The under side
within said bearing adapted for alignment with said
of the stop plate 97 is provided with a beveled shoulder
means comprising a keyway within said journal, a key
102 which ?ts into the slot 98 in journal 91. Key holder
within said keyways in alignment with each other capable
50
92 is securely fastened to hearing 16 by means of screws
of rupture upon imposition of a predetermined torque
103 and 103’ passing through key holder 92. Key holder
upon said journal, a tongue integral with said bearing a
92 is provided with slot, or keyway, 105 in its upper part.
shaft ?xedly mounted on said tongue, a yoke rotatably
Cover plate 96 is fastened to the top surface of key holder
mounted on said shaft for movement in a plane perpen
92 by means of screw 106 passing through cover plate
55 dicular to said ski blade and adapted for engaging a ski
96 which also serves as a pivot. The cover plate 96 is also
boot, means comprising a keyway within said yoke, a
provided with handle 107 fastened as by brazing to the top
collar ?xedly mounted on said shaft, means comprising a
surface which is used to ‘swing cover plate 96 to the side
keyway within said collar adapted for alignment with said
to permit insertion_ of key 95 in slot 105. Bushing 19
means comprising a keyway within said yoke, and a key
and washers 20 and 21 are made of a material such as
within said last-named keyways in alignment with each
Te?on and are interposed between the bearing 16 and the 60 other capable of rupture upon imposition of a predeter
journal 91 and (between bearing 16 and plate 23 to reduce
mined torque upon said tongue. '
'
friction when relative motion occurs.
3. A ski binder mounted on a ski blade for releasably
In normal position slot 105 in key holder 92 and slot
securing a ski boot to said ski'blade comprising in com
98 in journal 91 are in line with each other. In these
bination a base plate ?xedly mounted to said ski blade,
slots, in line with each other, is key 95 and spring 94. 65 journal means provided with an outwardly extending
The key 95 and spring 94 are retained in position by the
cover‘ plate 96 which may be swung back about the pivot‘
point 106 for inserting or removing the key.
shoulder at one end thereof ?xedly mounted on said base
plate at the other end thereof, means comprising a key
way
within said journal means, a bushing on said jour
- In operation, bearing 16 tends to rotate about journal.
nal
means,
a pair of washers around said bushing, one of
70
91 when a torque is applied to hearing 16 parallel to the
said washers contacting said base plate and the other of
plane of the ski blade 12 as the result of forces transmitted
said washers contacting- the underside of said shoulder
from the ski boot B as described above. At a predeter
on said journaljmeans, bearing means, adapted for en
mined force key 95 will rupture allowing bearing 16 to
gaging a ski boot rotatably mounted'about said bushing
rotate and releasing the boot B'from the ski blade in the
same manner as‘ described above. To reset the release 75 and contacting said washers, a keyholder ?xedly engaged
5
3,039,782
to said bearing means, means comprising a keyway with
in said keyholder adapted for alignment with said means
comprising a keyway Within said journal means, a key
within said keyways in alignment with each other capable
of rupture upon imposition of a predetetermined torque
upon said journal means, and a cap in contact with said
bearing means and maintaining said key in position Within
said keyways.
6
means comprising a keyway within said journal means, a
spring within said last-named keyway within said key
holder, 2. key within said keyways in alignment with each
capable of rupture upon imposition of a predetermined
torque upon said journal means and in contact at one end
thereof with said spring, a cover plate in contact with said
keyholder and covering said keyways, a stop plate ?xedly
attached to said journal means, and a shoulder attached
4. A ski binder mounted on a ski blade for releasably
to said stop plate ?tting into said means providing a key
securing a ski boot to said ski blade comprising in com 10 way ‘within said journal means and in contact with the
bination a base plate ?xedly mounted to said ski blade,
other end of said key.
journal means provided with an outwardly extending
shoulder ?xedly mounted on said base plate, means com
References Cited in the ?le of this patent
prising a keyway within said journal means, a bushing on
UNITED STATES PATENTS
said journal means, a pair of washers around said bush 15
2,517,795
Majneri _________ ________ Aug. 8, 1950
ing, one of said washers contacting said base plate and
2,649,306
Hilding _____________ __ Aug. 18, 1953
the other of said ‘washers contacting the underside of said
shoulder on said journal means, ‘bearing means adapted
FOREIGN PATENTS
for engaging a ski boot rotatably mounted about said
bushing and contacting said washers, a keyholder ?xedly 20
engaged to said ‘bearing means, means comprising a key
way Within said keyholder adapted for alignment with said
169,906
173,073
55,685
Austria ______________ __ Dec. 27, 1951
Austria _____________ __ Nov. 10, 1952
France ______________ __ May 21, 1952
(Addition to 858,446)
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