US3396987A - Safety head for ski binding - Google Patents

Safety head for ski binding Download PDF

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Publication number
US3396987A
US3396987A US570343A US57034366A US3396987A US 3396987 A US3396987 A US 3396987A US 570343 A US570343 A US 570343A US 57034366 A US57034366 A US 57034366A US 3396987 A US3396987 A US 3396987A
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United States
Prior art keywords
lug
irons
boot
ski
binding
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Expired - Lifetime
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US570343A
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English (en)
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Zimmermann Werner
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Individual
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Individual
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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
    • A63C9/085—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable

Definitions

  • ABSTRACT OF THE DISCLOSURE A safety head for a ski binding wherein a baseplate is fixed on the ski having a pivot pin.
  • a pivoting member is pivotally mounted on the pin and at each flank of the pivoting member a lug iron is independently mounted to pivot about a vertical axis.
  • a separate securing means cooperates with the front edge of the boot sole maintaining each of the lug irons in normal position.
  • the lug irons are slidable in opposite directions and substantially parallel to the longitudinal axis of the ski under a force from the ski boot so that at least one of said lug irons can swivel laterally about its axis to disengage the boot.
  • the ski boot sole has a notch and each of the lug irons has a tip cooperating with such notch.
  • the lug irons are held together by an elastic member.
  • My present invention relates to a safety head for ski bindings, which is combinable with any desired circumferential components, heel clamps and automatic heel restraining means.
  • Such safety heads shall allow of an automatic boot release in the case of a plunge or fall or other extraordinary stresses and thereby prevent a torsional stress of the skiers foot or leg which easily might lead to fractures.
  • it has been tried to attain such object by accommodating the front sole-edge of the boot in a toe lug iron which on exceeding a certainforce is adapted to yield laterally as well as axially in the skiers direction of movement and thereby release the skiers boot.
  • the magnitude of the force required for release which de pends, not only on the body weight of the skier but also substantially on the snow conditions, is adjustable only very roughly. In the case of a long descent in which the skier for example meets first with powdery snow and then with wet snow of continually increasing water content, a continual readjustment would be required. Further, the accurate rel ase force solely may be found by experimentation which, of course, already is risky.
  • the detent lug of the head is mounted on a plate which in turn is pivotably mounted by two depending pins in arcuate elongated slots of a second plate.
  • the force required for releasing a ball-lock has to be set up before the lug can be laterally pivoted.
  • the correct and appropriate adjustment of the releasing force is an unsolved problem, and the binding in ice many cases will respond either too frequently or too late.
  • a third known safety binding are .provided two separate lugs which may be pushed aside against the pressure of a helical spring. As the counter-pressure of the helical spring increases with the increasing extent of pivotal movement, the risk of a torsional stress of the foot or leg still is relatively great.
  • the safety binding disclosed by my present invention does not have any of the disadvantages mentioned above.
  • This invention is characterized by a member pivotable in a horizontal plane, to each of the two flanks of which is pivoted a toe lug iron on a substantially vertical axis, said two lug irons being equally spaced from the pivotal axis so that they are axially movable in opposite directions and also laterally pivotable.
  • the safety head disclosed herein responds at once to a torsional movement of the foot since there is practically no force opposing a lateral pivotal movement. A premature release, however, is altogether out of question, since the two toe lug irons in the normal boot position are held together by the boot itself and can only separate from each other after a pivotal movement of the boot tip.
  • the binding head disclosed by my present invention may be used with or without extensions, since the torsional safety will only be improved yet by such extensions.
  • FIG. 1 is a top plan view of the safety head
  • FIG. 2 is a section on the line IIII of FIG. 1,
  • FIG. 3 is a sideview of the binding
  • FIG. 4 shows a detail of the head
  • FIGS. 5 to 7 show structural details
  • FIGS. 8 and 9 illustrate the mode of operation of the safety head.
  • Plate 1 substantially has the form of a horseshoe (FIG. 4) and at its two corners comprises a recess 4 and 5 respectively, the purpose of which will be explained later.
  • stud 7 is integral with base plate 1.
  • Stud 7 serves for centering and fixing a balance beam 8 which through its underside is seated on the top side of base plate 1 and is pivotable thereon about stud 7.
  • Balance beam 8 is adapted to the shape of the base-plate front portion, and comprises a central indentation 9 which lies coaxially with stud 7 and serves for receiving a nut 10. By screwing down the nut 10 on stud 7, the balance beam 8 thus can be pressed down on the base plate 1.
  • the balance beam 8 comprises two lateral projections 8a (FIGS. 1 and 3) which protrude horizontally from the balance-beam body and which are engaged in the forklike connection portions 11a of two toe lug irons 11.
  • Each of the two projections 8a has a bore 8b, and these two bores are equally spaced from the longitudinal axis of the binding and are in registry respectively with two bores 11b (FIG. 3) provided in the forks 11a so that the toe lug irons 11 through their connecting portions 11a may be rotatably anchored to the projections 8a.
  • balance beam 8 (FIGS. 1 and 2) is forked.
  • an elastic tensible element 14 which by means of two pins 15 engages the two toe lug irons 11 and tends to pull same continually towards each other.
  • the mutual contact faces 16 of the lug irons 11 are so formed that the two lug irons may be axially moved relatively to each other whereby the contacting faces 16 slide on each other.
  • the endfaces of the lug irons 11, which are opposite to or remote from the axes 11b, are adapted in shape to the front portion of a ski boot.
  • Each of the two toe lug irons 11 further comprises a tip 17 (FIG. 4) adjacent to the axis of the binding, so that when the two lug irons 11 contact each other, there is produced a beaklike prominence towards the ski boot.
  • FIG. 4 shows the base plate by itself, only one of the two toe lug irons being indicated by dots and dashes.
  • the two rear corner portions of the base plate, which face the ski boot (not shown), are recessed at 4 and 5.
  • Each of the two lug irons 11 comprises a stop 19 (FIG. 3) at its exterior bottom edge, which is engaged in the recess 4 or and thereby prevents the lug iron from being swung beyond the axis of the binding.
  • FIG. 3 the sole 2% of the ski boot is slid underneath the projecting top portions of the two lug irons 11.
  • an auxiliary device known per se (see FIGS. 5 to 7).
  • This device substantially comprises an angular clamping member 21 (FIG. 7) of which the vertical portion has an elongated hole 22 and a lateral serrated edge 23. The latter may be brought into engagement with a similar serration provided in the two lug irons 11 and be fixed in any height desired by means of a screw 24.
  • screw 24 only has to be loosened somewhat and clamping member 21 fixed again at the desired height.
  • FIG. 8 depicts the binding gear in its normal position.
  • the lug irons 11 pivoted to balance beam 8 are disposed exactly symmetrical as to the longitudinal axis of binding and ski.
  • Boot 20 provided with a frontal notch 25 holds the toe lug irons on their tips 17.
  • the assembly comprisin balance beam 8 and toe lug irons 11 is statically determined and cannot move. Smaller forces slightly deviating from the direction of the arrow are taken up by the friction existing between beam 8 and base plate 1 and, therefore, cannot lead to a pivotal movement of the assembly. An accurate adjustment of said friction is possible by means of nut according to the body weight of the skier, the snow conditions and the like.
  • the foot turns for example to the position shown in FIG. 9 in which the axis of the boot deviates from the longitudinal axis of the ski.
  • the toe lug iron 11 positioned on the left in FIG. 9 will be slightly displaced in the direction of arrow 27 while the right-hand lug iron 11 executes a movement (arrow 28) in the opposite direction.
  • Thetwo tips 17 have become separated during this movement so that only the tip associated with the right-hand lug iron is still in the boot notch 25.
  • the right-hand lug iron can swing out in direction of the arrow 29 whereby the boot 20 is released and the risk for a fractured leg will be avoided.
  • the assembly described will also function positively if the two toe lug irons are not provided with tips 17.
  • the axial thrust exercised by boot 20 in its normal position (FIG. 8) generally will already suffice for holding together the lug irons 11, assuming that the spacing between the pivotal axes 8b and the axis of threaded stud 7 has been chosen accordingly.
  • the pressure exerted by the nut 10 has, as already mentioned, an influence on the moment of release. By tightening the nut more or less, there may be attained a harder or softer release respectively.
  • the elastic tensile element 14 may either be a rubber band, a spring or any other resilient spring means. It may be omitted too, since its function is not absolutely necessary for the positive and reliable operation of the binding and since the axial .pressure of the boots holds the toe lug irons together if same are formed correspondingly.
  • extensions may be mounted on the toe lug irons 11, which in no way will impair the readiness for release of the safety head disclosed, but which will improve same, Such extensions may be made integral with the lug irons 11 or detachable.
  • the sensitivity of response of the safety head may be lowered by tightening the nut 10.
  • the front portions of the toe lug irons are lengthened somewhat so that they partly cover the nut 10 (FIG. 1).
  • each of the two toe lug irons 11 a notch on the face opposite the boot, in which were engaged, in the normal position of the boot, a tip that projects from the boot-sole front edge.
  • the lug-iron faces adjacent to the boot could be provided with a friction lining, for example of rubber vulcanized thereto.
  • the safety head may be provided with an auxiliary device which is indicated in FIGS. 2 and 4 by dots and dashes.
  • the threaded stud 7 in this case is connected to a small plate 18 that is capable of executing an axial displacement in a recess 30 by a measure a.
  • Said plate on the side facing the ski tip has a horseshoelike recess 31 with which it engages, from one side, an elastic bumper 32 that is anchored in baseplate 1.
  • plate 18 which through stud 7 is connected to balance beam 8, presses against bumper 32 and slightly compresses same, depending on the intensity of the shock or bump.
  • Such buffer action thus permits to elastically take up any sudden shock stresses and allows of a less tiring travel.
  • Such buffer action furthermore, allows of a quicker travel, as the friction of the ski on the snow also will be decreased somewhat.
  • Body 32 may be made of any suitable elastic material such as rubber or plastic.
  • a safety head for a ski binding for a boot having a boot sole compriisng a baseplate fixed on a ski, a pivot pin mounted on said base plate, a pivoting member pivotally mounted on said pivot pin, a lug iron independently mounted to pivot about a substantially vertical axis on each flank of said pivoting member at the same distance from its pivoting axis, a separate securing means on each lug iron cooperating with the front edge of the boot sole maintaining each of said lug irons in its normal position, said lug irons being slidable in opposite directions and substantially parallel to the longitudinal axis of the ski under the influence of a unilateral force emanating from the ski boot, so that at least one of said lug irons can swivel laterally about its axis.
  • a safety head for a ski binding according to claim 1 wherein a tip protrudes from the boot-sole front edge, and each of said lug irons on the face adjacent the boot has an indentation in which in the normal position of the boot said tip engages.
  • a safety head as set forth in claim 9 wherein a plate is mounted axially movable fixedly connected to said threaded stud and a buffer element is anchored in said base plate to serve as a resilient stop for said plate.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US570343A 1965-08-07 1966-08-04 Safety head for ski binding Expired - Lifetime US3396987A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1116565A CH465465A (de) 1965-08-07 1965-08-07 Sicherheitskopf für Skibindung
CH1353965A CH453986A (de) 1965-08-07 1965-09-30 Sicherheitsvorrichtung an Skibindung

Publications (1)

Publication Number Publication Date
US3396987A true US3396987A (en) 1968-08-13

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ID=25707906

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Application Number Title Priority Date Filing Date
US570343A Expired - Lifetime US3396987A (en) 1965-08-07 1966-08-04 Safety head for ski binding

Country Status (5)

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US (1) US3396987A (de)
BE (1) BE685133A (de)
CH (2) CH465465A (de)
FR (1) FR1488691A (de)
NL (1) NL6611107A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508761A (en) * 1967-03-13 1970-04-28 Marker Hannes Toe iron for safety ski bindings
US3514120A (en) * 1967-04-18 1970-05-26 Smolka & Co Wiener Metall Ski binding
US3603607A (en) * 1967-09-28 1971-09-07 Hannes Marker Toe iron for safety ski bindings
US3734521A (en) * 1970-07-10 1973-05-22 Marker Hannes Toe iron for safety ski bindings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105696A (en) * 1960-01-16 1963-10-01 Smolka & Co Wiener Metall Safety binding with swivel jaw
US3282599A (en) * 1964-07-10 1966-11-01 Hvam Hjalmar Sole-protecting toe ski binding
US3298703A (en) * 1964-04-17 1967-01-17 Marker Hannes Toe iron for safety ski bindings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105696A (en) * 1960-01-16 1963-10-01 Smolka & Co Wiener Metall Safety binding with swivel jaw
US3298703A (en) * 1964-04-17 1967-01-17 Marker Hannes Toe iron for safety ski bindings
US3282599A (en) * 1964-07-10 1966-11-01 Hvam Hjalmar Sole-protecting toe ski binding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508761A (en) * 1967-03-13 1970-04-28 Marker Hannes Toe iron for safety ski bindings
US3514120A (en) * 1967-04-18 1970-05-26 Smolka & Co Wiener Metall Ski binding
US3603607A (en) * 1967-09-28 1971-09-07 Hannes Marker Toe iron for safety ski bindings
US3734521A (en) * 1970-07-10 1973-05-22 Marker Hannes Toe iron for safety ski bindings

Also Published As

Publication number Publication date
FR1488691A (de) 1967-10-25
CH465465A (de) 1968-11-15
CH453986A (de) 1968-03-31
NL6611107A (de) 1967-02-08
BE685133A (de) 1967-01-16

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