US3909023A - Safety ski binding - Google Patents

Safety ski binding Download PDF

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Publication number
US3909023A
US3909023A US488004A US48800474A US3909023A US 3909023 A US3909023 A US 3909023A US 488004 A US488004 A US 488004A US 48800474 A US48800474 A US 48800474A US 3909023 A US3909023 A US 3909023A
Authority
US
United States
Prior art keywords
pivotal axis
ski binding
housing
pivot tab
opening
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
US488004A
Other languages
English (en)
Inventor
Reinhold Zoor
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.)
Heinrich Wunder GmbH and Co KG
Original Assignee
Heinrich Wunder GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AT622973A external-priority patent/AT325487B/de
Application filed by Heinrich Wunder GmbH and Co KG filed Critical Heinrich Wunder GmbH and Co KG
Application granted granted Critical
Publication of US3909023A publication Critical patent/US3909023A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A63C9/0805—Adjustment of the toe or heel holders; Indicators therefor

Definitions

  • a ski binding holding and release mechanism for engaging the sole and/or heel of a ski boot includes a sole hold-down device which occupies one of two stable positions corresponding to the open and closed conditions, respectively, of the release mechanism. These stable positions are associated with the extrema of a spring loaded knee-joint which snaps from one position tothe other.
  • a pivoting tab connects the knee-joint to the sole hold-down device through a pin and slot mechanism. The form of the slot is so designed that the force bearing on the sole hold-down device during the process of opening the release mechanism can change in a desired manner; in particular, it may remain constant during the initial portion of the opening process.
  • This invention relates to safety ski binding with a sole hold-down device loaded by a release mechanism where the hold-down device is moved in the open position either by an overload substantially perpendicular to the ski surface or else by actuation of a release member wherein the release mechanism comprises a twoarmed pivot tab whose one lever arm is loaded by a spring and forms a pivoting knee-joint therewith, whereas the other lever arm is operatively connected with the sole hold-down device by a control pin disposed thereon, which engages a control slot within the pivot tab and wherein it is displaced during the opening or closing of the release mechanism.
  • the sole hold-down device is guided by pins in two slots affixed to the skis where the lower slot extends perpendicular to the ski surface and the upper slot is bent and first extends obliquely upward and to the rear and then extends substantially horizontally toward the rear end of the ski.
  • the upper control pin cooperates with the upper slot and influences the motion of the sole hold-down device, by engaging a straight, elongated hole within a double arm pivot .tab
  • the pivot tab fixedly mounted to the housing.
  • the free end of the pivot tab is engaged by a spring whose other end engages a further pivot tab attached to the ski and also provided with an elongated slot that is engaged by the lower pin guided within the lower slot.
  • the upper pin In the closed position, the upper pin is located at a point of the elongated hole which is farthest away from the pivotal axis of the pivot tab.
  • the pin is guided in the upper, cally fixed slot and travels in the direction of the pivotal axis of the pivot tab.
  • the load arm i.e., that lever arm of the pivot tab engaged by the load on the sole hold-down device
  • the power arm i.e., the lever arm engaged -by the spring.
  • the load bearing on the sole hold-down device compresses the spring approximately three and a half times as much as at the termination of the opening motion.
  • the resistance of the sole hold-down device to pivotal motion is much smaller at the beginning than at the end of the opening phase, i.e., before the pivoting knee-joint mechanism consisting of the pivot tab and the spring has reached its dead center position.
  • the kneejoint mechanism urges the sole hold-down device in the sense of the opening motion. It is possible to improve this unfavorable force-path diagram somewhat by means of the second pivot tab associated with the lower pin and engaged by the other end of the spring. However, the change in the lever arm ratio is relatively small so that the force-path diagram which governs the release process remains unfavorable in spite of the increased expenditure.
  • control pin and control slot In the description of the known embodiment, mention is made of control pin and control slot but only because, clue to the disposition of the elongated hole, referred to as a slot (and which is unconditionally required because otherwise the control pin guided in the locally fixed slot could not be in operative connection with the pivoting tab), there is a certain, albeit unfavorable, effect on the sole hold-down device which varies during the opening process and thus tends to influence and control the opening process.
  • the force-path diagram in a safety ski binding of this type many also be altered by changing the locally fixed slots in which the sole hold-down device is guided but such a change alters the opening motion of the sole hold-down device and this is not desirable.
  • the control pin In the closed position of the sole holddown device, the control pin is located at the starting point of the control slot, adjacent to the pivotal axis of the pivot tab, hence its distance to the pivotal axis, i.e., the load arm of the pivot tab, continuously increases during the opening motion.
  • the opening force applied to the sole hold-down device need not be increased.
  • the lever ratio in the twoarmed pivotal path i.e., the ratio of the power arm, engaged by the spring, to the load arm, engaged by the control pin thus changes from some predetermined and selectable value to a smaller value, also selectable within wide limits.
  • the variation in the force acting on the sole hold-down device depends on the form of the control slot.
  • the construction characteristics will first be determined by an expert, who will consider, for example, the height of the bind ing, the path of motion of the sole hold-down device with respect to the boot, the path of the spring up to the dead-center position, the residual spring path reserved for setting the spring stiffness and other parameters. Starting with a favorable disposition of these individual elements, he would than obtain the desired force-path diagram by choosing a particular form for the control slot.
  • control slot makes it possible to obtain a force-path diagram in which, after a steep onset of the force, immediately at the beginning of the opening motion, the force acting upon the sole hold-down device remains substantially constant during the further opening motion until the dead-center position of the knee-joint mechanism is reached, after which the force will decrease again.
  • the heel encounters substantially the same resistance during the entire opening path of the release process.
  • the guide slots for the sole hold-down device would have to be altered if a similar influence by means of the second pivoting tab is no longer possible.
  • the opening motion of the sole hold-down device is changed, and this is not desirable.
  • the force-path diagram may be changed by merely changing the form of the control slot without altering the path of motion of the sole hold-down device during the opening process.
  • the ski binding according to the invention is particularly simple in its construction due to the fact that it includes only a single pivot tab to influence the opening process of the sole hold-down device yet, nevertheless, makes possible the realization of any desired reasonable force-path diagram since that merely requires changing the form of the control slot.
  • a preferred embodiment of the invention is characterized in that the control slot has a first region adjacent to the pivotal axis of the pivot tab, which region either extends in the direction of the line connecting the attack point of the spring and the pivotal axis or else extends obliquely along one of the possible directions and it further has a second region, which is inclined with respect to the first region in a direction such as to accelerate the motion of the sole hold-down device while the motion of the pivot tab remains constant.
  • the control pin will travel a shorter or longer path from its starting point in the control slot before the dead-center of the knee-joint mechanism is reached.
  • the control pin travels farther on its track than if the first or inner region of the control slot is inclined opposite to the pivotal motion of the load arm of the pivot tab, assuming, of course, that the same conditions prevail at the power arm of the pivot tab.
  • the intitially posed condition according to which the tracks of motion of the control pin and of the starting point in the control slot continuously move away from one another, is particularly important, because this condition insures that the control pin always moves in one direction during the opening process. If this condition were not met, then the control pin would stop or might even reverse its motion and this could have a disadvantageous consequence if this reversal of motion takes place at the precise moment when the control pin is at the inflection point of the control slot because this would block the entire mechanism since, after traversing the inflection point, the control pin cannot return to the first region during the opening process.
  • control slot is embodied as an appropriately formed elongated hole within the pivot tab because this is the cheapest form of making a control slot, but in principle it could also be formed by milling a groove in a pivot tab of appropriate thickness or by providing raised limiting walls on the tab.
  • a particularly simple embodimental form of the safety ski binding results if the sole hold-down device and the pivot tab are each mounted pivotably about an axis running transverse to the longitudinal direction of the ski because fixed pivoting by means of a pivotal axis is less expensive than if the sole hold-down device and the pivotal axis of the pivot tab are guided in corresponding guides which, according to the invention, could in principle be used under the condition that the tracks of the control pin and of the starting point in the control slot, beginning from a mutual point shared in the closure position of the sole hold-down point, continually move away from one another during the opening process and that, in this process, the control pin continuously moves away from the pivotal axis of the pivot tab.
  • pivotal axis of the pivot tab lies beneath the pivotal axis of the sole hold-down device, resulting in a low profile construction for the ski binding which makes it usable not only for holding the heel but also suitable, in cooperation with a lateral pivotability, for holding the tip of the boot, which creates the possibility that the front binding releases the ski boot even during a backward fall.
  • the ratio of the two lever arms of the two-armed pivot tab i.g., the power arm which is engaged by the spring, and the load arm which is engaged by the control pin, is preferably 2:1 in the closure position and changes to approximately 1:1 in the open position.
  • the pivotal axis of the pivot tab lies belowthe pivotal axis of the sole hold-down device and is located between that device and the heel of the boot, whereas the support point of the spring is located in a housing fixed to the ski which also contains the pivotal axes, and lies at approximately the same height as the pivotal axis of the pivot tab.
  • a second, two-armed lever serving as a release member is pivotably mounted in the housing which contains the release mechanism and one of its lever arms engages the pivot tab, whereas the other lever arm is preferably equipped with a pulling means, for example, a grappling rope.
  • a preferred embodiment provides that the second lever arm serving for arbitrary actuation forms a part .of the housing.
  • the second lever arm which can be en- :gaged by the pulling means, extends beyond the spring of the ski binding and thus forms the cover of the housing, thereby reducing the expense.
  • FIG. 1 is a longitudinal section through the safety ski binding, according to an exemplary embodiment of the invention, in the closure position of the sole hold-down device, i.e., in its opeational position;
  • FIG. 2 shows the safety ski binding in the open position of the sole hold-down device.
  • a base plate 1 is to be screwed on a ski and, adjustably mounted thereon in the longitudinal direction of the ski is a housing 2 in the form of a slide which can be secured in the adjusted position.
  • a sole hold-down member 3 with an extension 4 is pivotably mounted about a pivotal axis 5 lying perpendicular to the longitudinal direction of the ski. Pivotable about the same axis is a release member 6 further described below, which has two lever arms 7, 8 of unequal length.
  • the sole hold-down device 3 includes a sole holding wind 10, mounted adjustable in height on a perpendicular, threaded bolt 9 and including a heel plate 11.
  • a double-armed pivot tab 13 pivoting about a second horizontal pivot axis 12 which lies below pivot axis 5 but closer to the boot.
  • the pivot tab 13 points obliquely downward in the closed position of the sole hold-down device, as may be seen in FIG. 1.
  • the load arm 14 of pivot tab 13, which, in this position, is the lower arm of pivot tab 13, is provided with a control slot 15 embodied as an elongated hole, whose outer region 16 is angled in the direction of opening of the sole hold-down device 3, identified by the arrow A, with respect to the inner region 16 of the control slot 15.
  • Engaging the control slot 15 is a control pin 17, fixedly connected with the sole hold-down device 3.
  • the pivot tab 13 is acted upon by a compressed spring 18 whose one end is supported on a set screw 20, pivotably mounted on a further horizontal transverse axis 19 fixed to the housing and whose other end is supported on an axis 22 located at the free end of the power arm 21 of pivot tab 13, whereby the spring 18 and the pivot tab 13 together form a knee-joint mechanism which pivots from one inflection position to another inflection position after overcoming a deadcenter position.
  • the control pin 17 travels from it starting position at the starting point C in the inner region 16 of the control slot 15 up to the cross-over point of the control slot at which the dead-center of the knee joint mechanism is reached, and into the second region 16.
  • the sole hold-down device 3 After traversal of the dead-center position, the sole hold-down device 3 is pushed into the open position by the effect of the spring.
  • the set screw 20 and/or its spring support 23 are so designed that turning the screw causes an axial motion of the spring support 23 and hence a change of the degree of compresion of the spring.
  • the angled release member 6 has a short lever arm 8 which engages the power arm2l of pivot tab 13 and a longer lever arm 7 with a loop 27 at its end for actuating the release member 6.
  • the sole hold-down device 3 At departure, the sole hold-down device 3 is in the closed position shown in FIG. 1 in which the knee-joint formed by pivot tab 13 and spring 18 points upwardly and the control pin 17 is located in the inner region 16' of the control slot 15 at the starting point adjacent to the pivotal axis 12. In this position, the sole hold-down device, whose sole holdiing wind 10, which is adjustable in height, abuts the sole of the ski boot, can exert a certain predetermined pressure.
  • controlpin 17 describes an arcuate track S about the pivotal axis 12 in the clock-wise sense as seen in the drawing where the radius of the track S is equal to the distance between the pivotal axis 5 and the control pin 17.
  • the result is that, starting at the common point C in the closure position of the sole hold-down device, the two tracks move away from one another and hence the lever ratio changes continuously with respect to the point of attack of spring 18 at the pivot tab 13, because, during the opening period, the control pin 17 starts from the starting point of the control slot 15 in the inner region 16' and nearest the pivotal axis 12 and moves beyond the cross-over point into the outer region 16.
  • the construction is such that the knee-joint mechanism is in its dead-center position when the control pin 17 reaches the crossover point of the control slot 15.
  • the knee-joint mechanism flexes into its lower position while the pivot tab 13 has rotated only by a relatively small angle.
  • the control pin travels within region 16 of the control slot 15. Since the outer region 16 of the control slot 15 is inclined, with respect to the inner region 16', in the direction of motion of the pivot tab, the control pin 17 and hence the sole hold-down device 3 are moved by a relatively large amount in spite of the small pivotal motion of pivot tab 13 and this amount is greater than it would be if the control pin 17 were within the inner region 16', for the same angular motion of the pivot tab.
  • the lever ratio of the power arm 21, whose length corresponds to the distance between the point of attack 22 of spring 18 and the pivotal axis 12, with respect to the constantly varying length of the load arm, corresponding to the distance between the pivotal axis 12 and the control pin 17, is 2:1 in the closure position of the sole hold-down device and 1:1 in the open position shown in FIG. 2.
  • a safety ski binding comprising, in combination: a. a housing adapted to be affixed to a base plate; b. means defining a first pivotal axis, attached to said housing and extending transversely to the longitudinal direction of said housing; c. a sole hold-down device mounted for movement about the first pivotal axis, and including a laterally protruding pin; and
  • a release mechanism including means defining a second pivotal axis, attached to said housing substantially parallel to and below said first pivotal axis, a pivot tab means mounted for movement about said second pivotal axis, said tab including two lever arms, one of which contains an opening, and a spring, pivotably mounted on said housing, one end of said spring engaging one of said lever arms so as to form a knee-joint and the opening within the other of said lever arms being engaged by said laterally protruding pin;
  • said sole hold-down device can move between two spring-loaded, stable angular positions, corresponding to an open and a closed condition of the release mechanism.
  • the load arm of the pivot tab points obliquely downwardly and the longitudinal axis of the spring points obliquely upward from the point of support on the housing.
  • bination further comprising a two armed release lever

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US488004A 1973-07-16 1974-07-12 Safety ski binding Expired - Lifetime US3909023A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT622973A AT325487B (de) 1973-07-16 1973-07-16 Sicherheits-skibindung
DE2411163A DE2411163C3 (de) 1973-07-16 1974-03-08 Sicherheits-Skibindung

Publications (1)

Publication Number Publication Date
US3909023A true US3909023A (en) 1975-09-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US488004A Expired - Lifetime US3909023A (en) 1973-07-16 1974-07-12 Safety ski binding

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US (1) US3909023A (enrdf_load_html_response)
CH (1) CH581483A5 (enrdf_load_html_response)
FR (1) FR2237656B1 (enrdf_load_html_response)
IT (1) IT1017125B (enrdf_load_html_response)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082315A (en) * 1974-07-26 1978-04-04 Gertsch Ag Safety ski binding
US4336955A (en) * 1978-02-06 1982-06-29 Hannes Marker Safety ski binding
US4444413A (en) * 1980-09-02 1984-04-24 Marker-Patentverwertungsgesellschaft Mbh. Heelholder for safety ski bindings
US4457534A (en) * 1980-09-05 1984-07-03 Marker-Patentverwertungsgesellschaft Mbh. Heelholder for safety ski binding
US5106111A (en) * 1987-10-23 1992-04-21 Ondrasik V John Wheeled grocery cart
US7832754B2 (en) * 2005-03-07 2010-11-16 Salomon S.A.S. Dual-control binding device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768822A (en) * 1970-09-16 1973-10-30 H Kanno Metal binding for a heel of ski boots
US3773341A (en) * 1970-12-07 1973-11-20 Carpano & Pons Ski binding
US3788660A (en) * 1970-02-03 1974-01-29 Gertsch Ag Spring lock
US3810644A (en) * 1971-07-30 1974-05-14 J Beyl Ski binding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788660A (en) * 1970-02-03 1974-01-29 Gertsch Ag Spring lock
US3768822A (en) * 1970-09-16 1973-10-30 H Kanno Metal binding for a heel of ski boots
US3773341A (en) * 1970-12-07 1973-11-20 Carpano & Pons Ski binding
US3810644A (en) * 1971-07-30 1974-05-14 J Beyl Ski binding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082315A (en) * 1974-07-26 1978-04-04 Gertsch Ag Safety ski binding
US4336955A (en) * 1978-02-06 1982-06-29 Hannes Marker Safety ski binding
US4444413A (en) * 1980-09-02 1984-04-24 Marker-Patentverwertungsgesellschaft Mbh. Heelholder for safety ski bindings
US4457534A (en) * 1980-09-05 1984-07-03 Marker-Patentverwertungsgesellschaft Mbh. Heelholder for safety ski binding
US5106111A (en) * 1987-10-23 1992-04-21 Ondrasik V John Wheeled grocery cart
US7832754B2 (en) * 2005-03-07 2010-11-16 Salomon S.A.S. Dual-control binding device

Also Published As

Publication number Publication date
IT1017125B (it) 1977-07-20
FR2237656A1 (enrdf_load_html_response) 1975-02-14
FR2237656B1 (enrdf_load_html_response) 1981-04-17
CH581483A5 (enrdf_load_html_response) 1976-11-15

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