US3630539A - Heel safety binding for a ski - Google Patents

Heel safety binding for a ski Download PDF

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Publication number
US3630539A
US3630539A US53220A US3630539DA US3630539A US 3630539 A US3630539 A US 3630539A US 53220 A US53220 A US 53220A US 3630539D A US3630539D A US 3630539DA US 3630539 A US3630539 A US 3630539A
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US
United States
Prior art keywords
heel
ski
pressure member
leaf spring
safety binding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US53220A
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English (en)
Inventor
Robert Lusser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKI SICHERHEITSBINDUNGEN KG
LUSSER AND CO GmbH Co
Original Assignee
Individual
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Filing date
Publication date
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Publication of US3630539A publication Critical patent/US3630539A/en
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Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/084—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable
    • A63C9/0847—Details of the manual release
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/084—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable
    • A63C9/0841—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable with a single jaw
    • A63C9/0842—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable with a single jaw the jaw pivoting on the body or base about a transverse axis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/084—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable
    • A63C9/0846—Details of the release or step-in mechanism
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/005—Ski bindings with means for adjusting the position of a shoe holder or of the complete binding relative to the ski
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/086—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings using parts which are fixed on the shoe of the user and are releasable from the ski binding

Definitions

  • a heel safety binding for a ski in which a pressure member extending transversely downwardly toward the front of the ski presses upon the rear edge of the heel of the ski boot or a metal heel fitting under a resilient prestress or tension and, upon attaining admissible maximum load, executes an upward angular movement against the prestress in the vertical longitudinal plane of the ski and during which movement the heel is released from the pressure member after a predetermined point in the upward path of movement.
  • the pressure member is connected at its upper portion with the upper leg of a substantially C-shaped leaf spring, the closed end of which faces the rear of the ski and the lower leg of which is mounted on a baseplate attached to the ski or directly to the ski.
  • This invention relates to a heel safety binding for a ski provided with a pressure member extending transversely downwardly toward the front of the ski under resilient prestress and which member presses upon the rear edge of the heel of the ski boot or a metal fitting at the heel and which, upon reaching a permissible maximum load performs an upward angular movement in the vertical longitudinal plane of the ski against the prestress and during which angular movement the heel of the ski boot will be released from the pressure member after a certain upward path of movement.
  • the transverse downwardly forwardly extending pressure member is guided at its front end by a guide means, which per se, is swingably located in a support positioned in the vertical longitudinal median plane of the ski, with the support extending upwardly from a baseplate mounted on the ski.
  • the resilient prestress which urges the pressure member against a metal fitting at the rear of the heel of the ski boot is effected by a set of springs anchored at the bottom of the baseplate and which at the top engages a selector lever located approximately in the middle of the guide means and which lever from such position extends or projects upwardly.
  • the selector lever is swingable in the same plane as the guide means and the pressure member, namely between a front final position in which the plane of the lines of application of the springs which engage the selected lever lies forwardly of the joint means connecting the selector lever with the guide means, and a rear final position in which such plane lies rearwardly of or behind the joint means.
  • the front final position of the selector lever is the downhill skiing position in which the torsional moment of the tensions of the spring is high as regards the guide means and also in regard to the force with which the pressure member presses against the metal fitting of the heel.
  • the selector lever Upon attaining the permissible maximum load, the selector lever changes to its rear final position and in such position, the known binding allows a considerable movement of the boot heel in an upward direction and therefore is suitable for climbing or cross-country skiing. If, however, even in this position of the selector lever the maximum load is reached, the pressure member swings so far upwardly against the resistance of an additional spring which grips the pressure member that the metal fitting of the heel is released.
  • one forwardly extending leg of an angle lever constitutes the pressure member and such lever is swingable about a horizontal axis extending transversely to the longitudinal direction of the ski.
  • the second leg of the angle lever is tubular and includes a piston as well as a spring which is supported by a threaded plug or stopper at the upper end of the tubular leg and which presses the piston against a flattened portion of the swinging axis.
  • the torsional moment of the spring as regards the swinging axis of the angle lever and also the force with which the pressure member presses against the heel of the boot is dependent upon the breadth of the flattened portion with a given prestress of the spring. ln order that the flattened portion may be sufficiently wide, the diameters of the swinging axis and of the piston must be relatively large and the diameter of the tubular leg of the angle lever is correspondingly larger.
  • the two above-mentioned known bindings have proven satisfactory in practice but do have a considerable height if arranged in such a manner as to be capable of absorbing a certain impact for safety of the skier for which a considerable extent of flexibility of the spring must be available until the ski boot is released from the downhill skiing position.
  • the cost of production of the above two bindings is considerable and in connection with the first-described binding this is due to the number of components and in the second because of the required precision of the components constituting the binding. This cost, however is justified in the first-mentioned binding since it is possible to utilize the binding also for cross country skiing which is seldom done by a large number of skiers.
  • the present invention is predicated on the problem of providing a particularly simple and lightweight heel safety ski binding which is insensitive to wear for downhill skiing and the problem has been solved by a binding in which the pressure member at its upper end is connected with the upper leg of a substantially C-shaped leaf spring connected via its lower leg to a baseplate or to the ski per se and which spring is closed towards the rear end of the ski.
  • the present leaf spring is advantageous as compared to the known guide arrangements in that it is quite resistant against lateral forces even when only of slight thickness with these lateral forces being transferred from the heel of the boot to the ski particularly when skiing on icy steep hills.
  • the width of the leaf spring can be dimensioned at each point in such a manner that the desired flexibility characteristic exists, such as, for example, the spring can be relatively broad at the point located furthest toward the rear and where the sharpest curvature is present and can then taper inwardly towards the free end of the upper leg of the spring.
  • the present binding is particularly light in weight and can be easily produced if the pressure member is an elongation of the upper leg of the leaf spring and the pressure member and leaf spring are made as a single component. ln a different type of construction, the pressure member is connected to the free end of the upper leg of the leaf spring via a suitable joint means.
  • the leaf spring can be selected in such a manner that the prestress developed by the spring and with which the pressure member presses on the rear edge of the heel of the ski boot or a metal fitting, will not be dangerous to sensitive or inexperienced skiers, particularly children, during a fall.
  • the prestress can also be augmented by connecting the two legs of the leaf spring at its open end or mouth with at least one tension spring.
  • tension springs of varying strength and/or diameter can be provided because the open end of the leaf spring provides sufficient space for permitting the attachment of such tension springs. If the pressure member is connected with the upper leg of the leaf spring via a joint means, a tension spring can be attached adjacent each end of the axis of the joint means.
  • the surface with which the pressure member presses against the heel or the metal heel fitting can be a substantially horizontal even plane in the operating position and if the ski is to be removed when attached to the ski boot with the present binding, it is easy to press the lower end of the pressure member rearwardly by hand until it slides off of the heel of the boot or the heel fitting whereby the foot is freed from the binding.
  • Dismounting is even simpler with a preferred embodiment of the present heel binding in which the free end of the upper leg of the leaf spring is rolled around a hinge pin or spindle and is provided with a longitudinal slot or slit which receives the pressure member, with the slit defining a rest portion for the tip of the ski pole which may be pressed from the rear against an extension of the pressure member projecting upwardly above the hinge pin for releasing the lower end of the pressure member from the heel or heel fitting.
  • the skier does not have to bend down if he desires to move the ski since, when the leaf spring is constructed efficiently, its upper leg is so broad that the rear end of the slot in which the pressure member is received can be sufiiciently widened for forming an easily accessible point for receiving the tip of the ski pole.
  • the pivotal stress required for dismounting in regard to the swinging axis which lies lower than such accessible point can simply be produced by pressing the ski pole forward at its handle.
  • the mouth or open end of the C-shaped left spring is to be somewhat widened during such mounting. For example, this can be accomplished by holding the upper leg of the leaf spring and pulling the spring in an upward direction and the upper leg can be provided with a handle or the handle may be at the upper end of the pressure member thereby making it possible to adjust the binding.
  • a smaller left spring may be provided at the underside of the upper leg of the leaf spring and such smaller spring will press the pressure member in a forward direction. If the pressure member is a part of the C-shaped leaf spring, the same action will occur even without an additional leaf spring.
  • a bearing block is provided at the lower leg of the C-shaped leaf spring in which is located a two-armed lever swingable in a vertical longitudinal plane with the rearmost arm extending outwardly through an opening in the leaf spring and which rear arm can be pressed downwardly by the tip of a ski pole and the forwardmost arm is preferably considerably shorter and engages under the lower end of the pressure member which is thrust rearwardly by the heel when the ski boot is placed upon the ski and which is then lifted, by pressing down the rearmost arm into a position in which the pressure member under the action of the forwardly pressing spring force attains its operative position.
  • the axis of the angular movement which is executed by the pressure member during release operation during a fall is not precisely defined. Even if the pressure member is connected via a joint means with the C- shaped leaf spring, the pressure member is not only swung around the axis of the joint means during the release operation but the entire angular movement of the pressure member includes a component which results from the enlargement of the C-shaped leaf spring.
  • the pressure member be provided with a nose or projection below a shoulder which presses on the upper rear edge of the heel or the metal heel fitting, which, if the heel moves upwardly after attaining an allowable maximum load, slides off from the rear edge of the heel or heel fitting and then presses the heel, after a certain upward path of movement, away from the shoulder.
  • the forward end of the lower leg of the C-shaped leaf spring is displaced upwardly and is formed with two spaced-apart tines or prongs which receive the heel fitting and the lower end of the pressure member therebetween.
  • FIG. 1 is a view in side elevation of the present heel safety binding for a ski
  • FIG. 2 is a plan view partly in section of the binding illustrated in FIG. 1,
  • FIG. 3 is an elevational view viewed in the direction of arrow III in FIG. 2,
  • FIG. 4 is a view taken along line IV-IV, the view looking in the direction of the arrows and in which the operative position is illustrated in dot-dash lines and the mounting position in full lines, and
  • FIG. 5 is a fragmentary view in elevation illustrating the release ofthe binding during a fall.
  • a ski to which is to be attached a ski boot 12 is provided with a baseplate 14 which may be secured thereto in any suitable fashion such as by means of screws (not illustrated).
  • the guide plate 14 is bent upwardly and inwardly along its longitudinal edges so that it fits over the lateral edges of a lower substantially horizontal leg 16 of a C-shaped leaf spring generally denoted 18.
  • the leaf spring 18 is capable of adjustment in the longitudinal direction of the guide plate 14 and when in its properly adjusted position is maintained against accidental displacement by means of a knurled head screw 20 whose free end enters one of a plurality of apertures 22 provided in the guide plate 14.
  • the leaf spring 18 is bend upwardly at its rear end or that end facing the rear end of the ski 10 thus providing an upper leg 24 which extends forwardly over the lower leg 16.
  • the upper leg 24 tapers inwardly towards its front or free end.
  • the front end is rolled as indicated at 26a for receiving a hinge pin or pintle 26 and intermediate the ends of the rolled over portion 26a, the leg is provided with a longitudinally extending slot 28 which is open at the front thereof.
  • a pressure member 30 is located on the hinge pin 26 within the slot 28 and the lower end of the pressure member 30 is provided with a shoulder 32 (FIG. 4) which, in the normal operating position of the binding, illustrated in FIG. 1 presses on a metal heel fitting 36 attached to heel 34 of the ski boot 12.
  • the forward end of the leg 16 of the spring 18 is displaced upwardly at approximately a right angle and is bifurcated to provide two prongs or tines 38 (FIG. 2) between which the pressure member 30 extends and into which the heel fitting 36 engages in such a fashion that the latter is prevented from a lateral displacement.
  • the tines or prongs 38 can be omitted if in some other manner there is provided means for preventing lateral displacement of the heel 34 of the boot 12 such as, for example, by retaining clips fixed to the ski 10 or the heel fitting 36 per se being bifurcated with the pressure member engaging between the sidewalls of the cupshaped rear portion of the heel fitting and which are elongated in an upward direction similar to tines or prongs.
  • each spring 40 is provided with a hook or the like at its lower end which engages an eye 42 while the upper end of the spring is disposed in a groove provided adjacent the end of the hinge pin or spindle 26.
  • the eyes 42 constitute part of the bearing block generally denoted 44 and at which is swingably positioned a lever 46 having front and rear arms 48 and 52 respectively. It will be seen that the lever 46 is disposed in the vertical longitudinal median plane of the ski and the binding.
  • a small leaf spring 50 is rivited or otherwise secured at its rear end portion of the lower surface of the upper leg 24 of the spring 18 and the forward end of the spring 50 presses upon the front arm 48 of the lever 46.
  • the small spring 50 serves for maintaining the two armed levers 46 in the angular position illustrated in FIG. 4 and at the same time the spring 50 serves for pressing the lower end of the pressure member 30 in a forward direction.
  • the rear arm 52 of the lever 46 projects rearwardly through a suitably formed opening 54 in the C-shaped leaf spring 18 and its rear portion is provided with a recess 52a which can receive the tip 56 ofa ski pole to enable pressure to be exerted on the arm 52 (FIG. 4) for swinging the lever 46 against the action of the leaf spring 50.
  • This particular arrangement serves the following purpose:
  • the ski boot illustrated in FIG. 4 is positioned on the ski in such a manner that the heel fitting 36 engages between the two tines 38, then the fitting presses the lower end of the pressure member 30 rearwardly in the position illustrated in FIG. 4.
  • a nose or projection 58 provided at the lower end of the pressure member 30 and extending downwardly is located immediately above the front arm 48 of the lever 46. If the rear end 52 of the lever 46 is pressed downwardly by the tip of the ski pole, the front arm 48 of the lever 46 acts upon the pressure member 40 during its upwardly directed swing until the shoulder 32 of the pressure member attains the height of the upper edge of the cup-shaped rear portion of the heel fitting 36.
  • the leaf spring 50 presses the pressure member 30 into the operative position illustrated by FIG. 1 by full lines and in FIG. 4 by dotdash lines.
  • the rear arm 52 of the lever 46 is approximately three times the length of the front arm 48 and consequently the force with which the arm 52 must be pressed downwardly merely amounts to one third of the prestress with which the pressure member 30 presses upon the heel fitting 36 in the operative position.
  • the nose or projection 58 at the lower end of the pressure member 30 serves yet another purpose namely the purpose of increasing the safety of the binding. If, during a forward fall, the inertia which induces the skier to fall forwardly becomes so great that the heel 34 of the ski boot is drawn upwardly with a force which is greater than the prestress of the pressure member 30, the two helical springs 40 and the opening of the leaf spring are enlarged.
  • the hinge pin or spindle 26 of the pressure member 30 moves upwardly and at the same time somewhat rearwardly with the pressure member 30 executing a swinging motion around the axis. During this motion, the nose or projection 58 comes into contact with the rear wall of the heel fitting 36 and is in camming engagement therewith.
  • the position of the pressure member in relation to the heel fitting 36 is obtained as is illustrated in H0. 5.
  • the nose or projection functions as a release and ensures that the fitting 36 is indeed released from the shoulder 32 of the pressure member 30.
  • the upward path of movement which must be covered by the heel 34 until it is completely released by the binding is predetermined sufficiently precisely for avoiding injuries to the skier by possible delayed release of the binding even though the adjustment of the springs 18 and 40 was correct.
  • the tip 56 of a ski pole (FIG. 2) can be inserted into the rear portion of the slot 28 which is a funnellike component 60 and thus exert a forwardly directed pressure onto portion 62 of the pressure member 30 which extends upwardly above the hinge pin or spindle 26.
  • the lower end of the pressure member is swung rearwardly and the shoulder 32 slides off the heel fitting 36.
  • a heel safety binding comprising a pressure member mounted for swinging movement in a vertical longitudinal plane on a ski, said pressure member extending downwardly and forwardly for pressing on the rear edge or heel fitting of a ski boot under a resilient prestress, and upon attaining an admissible maximum load executing an upward angular movement against the resilient prestress in the vertical longitudinal plane and during which the heel of the ski boot is released from the pressure member after a predetermined point in the upward angular path.
  • a C-shaped leaf spring having an upper leg, a lower leg, a closed end, and an open end, said lower leg being mounted on the ski with said closed end facing the rear of the ski, and means operatively connecting the upper portions of the pressure member to the upper leg of the leaf spring
  • said pressure member is connected by means of a hinge pin with a free end of said upper leg.
  • the heel safety binding as claimed in claim 2 including a small leaf spring connected at one end of the undersurface of the upper leg of said C-shaped leaf spring and the opposite end of said small leaf spring pressing said pressure member forwardly.
  • the heel safety binding as claimed in claim 1 including a bearing block provided on the lower leg of said C-shaped leaf spring, a two-armed lever mounted on said bearing block for swinging movement in the vertical longitudinal plane, the rear arm of said lever extending through an opening in the closed end of said leaf spring capable of being pressed downwardly by the tip of a ski pole, the front arm of said-lever being of lesser length than the rear arm and engaging under the lower end of said pressure member which is pressed rearwardly by positioning a ski boot onto the ski thereby raising the pressure member into a position from which it will independently arrive at its operative position under the action of a spring force which presses the same forwardly.
  • said pressure member at its downward end pressing on the rear edge or heel fitting of the ski boot comprises: a shoulder formation engaging said rear edge or heel fitting in normal skiing operation; and an extension which partly forms said shoulder, the extension being in the form of a rounded nose which comes into camming engagement with the rear face of the rear edge or heel fitting of the ski boot so as to assist in the release of the boot from the safety binding when the heel of the boot is drawn upwardly with a force greater than a predetermined limit.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US53220A 1969-07-23 1970-07-08 Heel safety binding for a ski Expired - Lifetime US3630539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937501A DE1937501C3 (de) 1969-07-23 1969-07-23 Fersenhaltevorrichtung für Skisicherheitsbindungen

Publications (1)

Publication Number Publication Date
US3630539A true US3630539A (en) 1971-12-28

Family

ID=5740691

Family Applications (1)

Application Number Title Priority Date Filing Date
US53220A Expired - Lifetime US3630539A (en) 1969-07-23 1970-07-08 Heel safety binding for a ski

Country Status (7)

Country Link
US (1) US3630539A (fr)
AT (1) AT302854B (fr)
CA (1) CA921951A (fr)
CH (1) CH529573A (fr)
DE (1) DE1937501C3 (fr)
ES (1) ES192372Y (fr)
FR (1) FR2053102B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754769A (en) * 1971-11-30 1973-08-28 Dovre Ski Binding Inc Ski binding
US3785664A (en) * 1971-01-16 1974-01-15 Ver Baubeschlag Gretsch Co Heel supporting device of a ski safety binding
US9220968B2 (en) * 2014-06-03 2015-12-29 William J Ritter Heel lock for splitboard binding interface
US10814210B2 (en) 2018-01-24 2020-10-27 Spark R&D Ip Holdings, Llc Heel-locking device for snow glide board bindings

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684016B1 (fr) * 1991-11-25 1994-01-14 Salomon Sa Element de fixation de securite de ski alpin.
DE4238657A1 (de) * 1992-11-16 1994-05-19 Marker Deutschland Gmbh Auslösende Skibindung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823922A (en) * 1954-05-10 1958-02-18 Bernard E Berlenbach Safety binding for a ski
US3379447A (en) * 1965-05-28 1968-04-23 Webster Gordon Ashton Ski safety binding device
US3467407A (en) * 1966-08-27 1969-09-16 Paul Unger Safety binding with double crank means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823922A (en) * 1954-05-10 1958-02-18 Bernard E Berlenbach Safety binding for a ski
US3379447A (en) * 1965-05-28 1968-04-23 Webster Gordon Ashton Ski safety binding device
US3467407A (en) * 1966-08-27 1969-09-16 Paul Unger Safety binding with double crank means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785664A (en) * 1971-01-16 1974-01-15 Ver Baubeschlag Gretsch Co Heel supporting device of a ski safety binding
US3754769A (en) * 1971-11-30 1973-08-28 Dovre Ski Binding Inc Ski binding
US9220968B2 (en) * 2014-06-03 2015-12-29 William J Ritter Heel lock for splitboard binding interface
US10814210B2 (en) 2018-01-24 2020-10-27 Spark R&D Ip Holdings, Llc Heel-locking device for snow glide board bindings

Also Published As

Publication number Publication date
FR2053102B1 (fr) 1973-05-25
AT302854B (de) 1972-10-25
DE1937501B2 (de) 1974-03-07
CH529573A (de) 1972-10-31
DE1937501A1 (de) 1971-02-11
ES192372U (es) 1974-11-01
FR2053102A1 (fr) 1971-04-16
ES192372Y (es) 1975-02-16
DE1937501C3 (de) 1974-10-03
CA921951A (en) 1973-02-27

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