US3399902A - Safety toe iron for ski bindings - Google Patents

Safety toe iron for ski bindings Download PDF

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Publication number
US3399902A
US3399902A US616710A US61671067A US3399902A US 3399902 A US3399902 A US 3399902A US 616710 A US616710 A US 616710A US 61671067 A US61671067 A US 61671067A US 3399902 A US3399902 A US 3399902A
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US
United States
Prior art keywords
pivoted member
boot
toe iron
ski
pivot pin
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
US616710A
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English (en)
Inventor
Adam Gunter
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.)
Marker International Co
Original Assignee
Individual
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
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Application granted granted Critical
Publication of US3399902A publication Critical patent/US3399902A/en
Assigned to MARKER-PATENTVERWERTUNGSGESELLSCHAFT MBH., A SWISS CORP. reassignment MARKER-PATENTVERWERTUNGSGESELLSCHAFT MBH., A SWISS CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MARKER, HANNES
Anticipated expiration legal-status Critical
Assigned to MARKER INTERNATIONAL COMPANY reassignment MARKER INTERNATIONAL COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MARKER-PATENTVERWERTUNGSGELLSCHAFT GMBH
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
    • A63C9/085—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08557—Details of the release mechanism
    • A63C9/08578—Details of the release mechanism using a plurality of biasing elements
    • 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
    • A63C9/08535—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a mobile body or base or single jaw
    • A63C9/0855—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable with a mobile body or base or single jaw pivoting about a vertical 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
    • A63C9/085—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A63C9/08557—Details of the release mechanism
    • A63C9/08564—Details of the release mechanism using cam or slide surface
    • 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 safety toe iron for ski bindings comprises a main pivoted member, which is pivoted to the ski, and a sole holder member, which is engageable by the forward edge of the sole of the skiing boot under the action of a tightener on the heel of the boot.
  • One of these two members carries two pivot pins, which are equally spaced on opposite sides of its longitudinal center line.
  • the other of these two members is formed with two guide slots, which are respectively engaged by said pivot pins and extend each along an arc of a circle, which is centered on the rear end of the respective other guide slot, if the slots are formed in the sole holder, or on the forward end of the respective other guide slot if the slots are formed in the main pivoted member.
  • the arrangement is such that the pivot pins engage the rear ends of said slots in the normal position of the toe iron.
  • a piston-like restoring member extends horizontally in the pivoted member of the toe iron and is urged by a strong coil spring against a fiat of the pivot pin for the pivoted member.
  • the restoring member Upon any pivotal movement of the pivoted member, the restoring member is urged back by one of the edges of the flat and under the action of the coil spring tends to return to its initial position so that the pivoted member is returned to its normal position.
  • These known safety toe irons may consist of double-pivot assemblies, in which a sole holder is pivoted to the main pivoted member.
  • the pivoted member itself may be formed with the surface for engaging the forward edge of the sole of the boot so that the release causes the forward edge of the sole of the boot to roll along the abutment surface of the pivoted member.
  • the tightener which bears on the heel directly or by a wire cable, applies pressure to the boot immediately after the beginning of the pivotal movement and pushes the boot forwardly in unison with the forward movement of the sole holder.
  • the coil spring which acts by means of the piston member against the flat of the pivot pin, can effect a return movement only if the spring overcomes the force of the tightener, which acts in the longitudinal direction of the ski. This is possible only after relatively small pivotal movements of the foot, which cannot result in a considerable forward displacement.
  • the foot held by the known binding may come to rest in a dead-center position, from which it cannot be returned against the tightener pressure by the force of the spring which is contained in the pivoted member, and, on the other hand, the foot is not released in said position.
  • a fall of the skier is almost inevitable.
  • the safety toe iron should be designed so that the force exerted by the tightener in the longitudinal direction of the ski is utilized for restoring the foot to its normal position after an action of slight forces so that no separate spring means are required which are adjustable to the limiting torque which is tolerable by the foot. This concept results in a safety toe iron which has no adjusting elements so that it can be manufactured at particularly low cost.
  • the invention provides a known double-pivot safety toe iron for ski bindings, which toe iron comprises a main pivoted member, which is rotatable about a pivot pin that is at right angles to the surface of the ski, and a sole holder, which is pivoted to the main pivoted member and has a vertical abutment surface, against which the forward edge of the sole of the skiing boot bears with a wide surface, as the boot is elastically urged forwardly by a tightener.
  • the sole holder In response even to a slight deflection of the main pivoted member from its normal position, the sole holder will be pivotally moved in the opposite direction and will be immediately moved forwardly so that the tightener is relieved.
  • the object of the invention is accomplished in that the sole holder is pivoted to the main pivoted member by two vertical pivot pins, which are spaced on opposite sides from the longitudinal center line of the main pivoted member and engages respective guide slots formed in the sole holder in accordance with arcs of a circle, each of which arcs is centered on the forward end of the other guide slot, the rear end faces of the guide slots engaging the pivot pins in the normal position.
  • the sole holder urges the boot rearwardly to some extent against the action of the tightener during an outward pivotal movement of the main pivoted member because that of the eccentric pivot pin which is trailing in the direction of the outward pivotal movement is then constrained to perform a movement along an arc of a circle which has a component that is rearwardly directed in the longitudinal direction of the ski.
  • this pivot pin bears on the rear end of its guide slot, the sole holder cannot yield, but must urge the boot rearwardly.
  • This adjustment will also determine the magnitude of the forces which move the boot to a position from which it is subsequently restored because the tightener force which acts in the longitudinal direction of the ski tends to urge the toe iron back to its normal position as long as the pivot pin which is trailing in the direction of the outward pivotal movement has not traversed the longitudinal center line of the ski.
  • the angle through which the main pivoted member must be moved until the pivot pin which is trailing in the direction of the outward pivotal movements has traversed the longitudinal center line of the ski is thus the range from which an elastic restoring action takes place after the occurrence of relatively small lateral impacts and torsional stresses.
  • the foot is not released unless it is acted upon by a force which is so strong or has continued for such a long time that the pivot pin which is trailing in the direction of the outward pivotal movement has traversed the longitudinal center line of the ski so that the boot is no longer urged to the rear by the sole holder.
  • the pivot pin which is leading in the direction of the outward pivotal movement slides in its guide slot because the pivot pin which is leading in the direction of the outward pivotal movement is not significant for the specific function of the toe iron according to the invention.
  • the guide slot which guides said leading pivot pin extends along an arc of a circle about the point where the pivot pin which is trailing in the direction of the outward pivotal movement is then disposed so that the relative movement between the pivot pin which is leading in the direction of the outward pivotal movement and its guide slot is not obstruced.
  • the sole holder is mounted by two vertical pivot pins, which are eccentrically secured to the sole holder on both sides of the longitudinal center line of the sole holder, and the pivot pins extend into respective guide slots formed in the main pivoted member, each of said guide slots forming a portion of an arc of a circle centered on the forward end of the respective other guide slot and the pivot pins engaging the forward end faces of the guide slots in the normal position.
  • means may be provided for elastically holding the main pivoted member and/or the sole holder in the normal position. These means are not significant for the releasing function of the toe iron and serve only to facilitate the stepping into the toe iron without need for holding the toe iron by hand while the foot is stepping into the binding.
  • FIG. 1 is a sectional view taken on line II of FIG. 2 and showing a safety toe iron according to the invention
  • FIG. 2 is a horizontal sectional view taken on line II-II of FIG. 1,
  • FIG. 3 is a view similar to FIG. 2 and shows the toe iron according to the first embodiment during the releasing operation
  • FIG. 4 is a view similar to FIG. 1 and shows a second embodiment in a sectional view taken on line IV-IV of FIG. 5,
  • FIG. 5 is a top plan view showing the embodiment of FIG. 4.
  • FIGS. 1 to 3 The first embodiment of a safety toe iron according to the invention is shown in FIGS. 1 to 3 and comprises a base plate 3, which is secured to a ski 1 by screws 2 and carries a screw-threaded pivot pin 4 for mounting the toe iron.
  • a main pivoted member 5 has a tapped bore 6 and is rotatably mounted on the pivot pin 4. By one or more revolutions of the main pivoted member 5 about the pivot pin 4, the main pivoted member can be adjusted in height when a stop screw 7 has been removed. This screw serves to prevent an unintended adjustment in height.
  • the forward edge of the sole of the boot is engageable with a sole holder 8, which forms a wide-mouthed sole holder and entirely embraces the forward edge of the sole of the boot.
  • the forward edge of the sole of the boot bears on a vertical abutment surface 9 of the sole holder 8.
  • a flange 10 of the sole holder prevents a lifting of the boot from the ski.
  • the sole holder is pivoted to the main pivoted member by a pivot pin, which is disposed in the longitudinal center line of the main pivoted member so that an outward pivotal movement of the main pivoted member will impart to the sole holder from the beginning a movement which has a forwardly directed component.
  • the pivoted member is provided with two eccentric pivot pins 11, 12, which are spaced from its longitudinal center line and extend into guide slots 13, 14 formed in the sole holder 8.
  • Each of the guide slots 13, 14 is formed in accordance with an arc of a circle, which is centered on the rear end of the opposite guide slot or on the left-hand end thereof as viewed in the drawing.
  • each pivot pin 11, 12 extends .from above entirely through the main pivoted member 5 so that a stable mounting is ensured.
  • the skiing boot is elastically forced against the sole holder 8 by a tightener, which acts on the heel of the boot.
  • a tightener which acts on the heel of the boot.
  • the rear ends of the guide slots 13, 14, or the left-hand ends thereof as viewed in the drawing bear on the pivot pins 11, 12, which are secured to the main pivoted member 5.
  • the main pivoted member is reliably held in its central position without need for a detent device or another retaining device for this purpose.
  • FIGS. 4 and 5 like reference characters as in FIGS. 1 to 3 are used for like parts. The description of these parts need not be repeated.
  • the embodiment differs from the embodiment first described in that pivot pins 15, 16 are secured to the sole holder 8 rather than to the main pivoted member 5 and guide slots 17, 18 are formed in the main pivoted member 5. In th normal position of the toe iron, the pivot pins 15, 16 engage the forward ends of the guide slots 17, 18.
  • a screw 19 holds a weak torsion spring 20, which automatically swings the sole holder 8 back to its initial position when the foot has been released. This torsion spring has no function during the release because it is too weak to exert any appreciable force on the foot.
  • a leaf spring 21 is secured by the stop screw 7 to the forward end of the baseplate 3.
  • the leaf spring 21 embraces the forward end of the pivoted member 5 in its normal position so that the main pivoted member 5 is held in this position and need not be moved to and held in the central position when the skier desires to step into the binding. It will be understood that a torsion spring could be provided which cOrresponds to the spring 20 and returns the main pivoted member 5 elastically to its central position after a fall.
  • the safety toe iron according to the invention comprises no adjusting means for adjusting the above-mentioned force which is required for a release because this required force depends only on the adjustment of the tightener acting on the heel.
  • the spacing of the pivot pins 11, 12 or 15, 16 and of the guide slots associated with them may be varied because the rearward movement of the pivot pin which is trailing in the direction of the outward pivotal movement will be the smaller the smaller is the spacing of this pivot pin from the longitudinal center line of the ski when this pin is in its normal position.
  • a double-pivot safety toe iron for ski bindings comprising a pivot pin mounted at right angles to the surface of a ski, a main pivoted member rotatably mounted about said pivot pin, a sole holder having a vertical abutment surface against which the forward edge of the sole of a skiing boot bears with a wide surface as the boot is elastically urged forwardly by a tightener, and means pivotally mounting the sole holder to the main pivoted member including two vertical pivot pins which are spaced on opposite sides from the longitudinai centerline of the main pivoted member and engage respective guide slots formed in the sole holder in accordance with arcs of a circle, each said arc centered on the rear end of the other guide slot, the rear end faces of the guide slots engaging the pivot pins in the normal position.
  • a double-pivot safety toe iron for ski bindings comprising a pivot pin mounted at right angles to the surface of a ski, a main pivoted member rotatably mounted about said pivot pin, a sole holder having a vertical abutment surface against which the forward edge of the sole of the skiing boot bears with a wide surface as the boot is elastically urged forwardly by a tightener, and means pivotally mounting the sole holder including two vertical pivot pins which are eccentrically secured to the sole holder on both sides of the longitudinal centerline of the sole holder, said pivot pins extending into respective guide slots formed in the main pivoted member, each of said guide slots forming a portion of an arc of a circle centered on the forward end of the respective other guide slot, and the pivot pins engaging the forward end faces of the guide slots in the normal position.
  • a safety toe iron according to claim 1 characterized by means for resiliently holding one of the main pivoted member .and the sole holder in a rest position.
  • a double-pivot safety toe iron for ski bindings comprising a pivot pin mounted at right angles to the surface of a ski, a main pivoted member rotatably mounted about said pivot pin, a sole holder having a vertical abutment surface against which the forward edge of the sole of a skiing boot bears with a wide surface as the boot is elastically urged forwardly by a tightener, and means pivotally mounting the sole holder to the main pivoted member including two vertical pivot pins which are spaced on opposite sides from the longitudinal centerline of the main pivoted member and engage respective guide slots formed in the sole holder in accordance with arcs of a circle, each said are centered on the rear end of the other guide slot.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US616710A 1966-02-24 1967-02-16 Safety toe iron for ski bindings Expired - Lifetime US3399902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0068519 1966-02-24

Publications (1)

Publication Number Publication Date
US3399902A true US3399902A (en) 1968-09-03

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ID=7312642

Family Applications (1)

Application Number Title Priority Date Filing Date
US616710A Expired - Lifetime US3399902A (en) 1966-02-24 1967-02-16 Safety toe iron for ski bindings

Country Status (5)

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US (1) US3399902A (fr)
AT (1) AT282434B (fr)
CH (1) CH457233A (fr)
ES (1) ES337117A1 (fr)
FR (1) FR1511859A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823954A (en) * 1971-10-01 1974-07-16 W Suhner Ski binding
US4134603A (en) * 1976-05-15 1979-01-16 Heinrich Wunder Kg. Safety ski binding

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518050Y2 (fr) * 1977-12-03 1980-04-25

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079164A (en) * 1959-08-21 1963-02-26 Place Henri De Safety knock-off devices for ski binders
US3107101A (en) * 1961-03-07 1963-10-15 Micro Mega Sa High-speed rotary tool holder
US3288477A (en) * 1963-06-27 1966-11-29 Beyl Jean Joseph Alfred Safety ski binding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079164A (en) * 1959-08-21 1963-02-26 Place Henri De Safety knock-off devices for ski binders
US3107101A (en) * 1961-03-07 1963-10-15 Micro Mega Sa High-speed rotary tool holder
US3288477A (en) * 1963-06-27 1966-11-29 Beyl Jean Joseph Alfred Safety ski binding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823954A (en) * 1971-10-01 1974-07-16 W Suhner Ski binding
US4134603A (en) * 1976-05-15 1979-01-16 Heinrich Wunder Kg. Safety ski binding

Also Published As

Publication number Publication date
CH457233A (de) 1968-05-31
FR1511859A (fr) 1968-02-02
ES337117A1 (es) 1968-01-16
AT282434B (de) 1970-06-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MARKER-PATENTVERWERTUNGSGESELLSCHAFT MBH., BAAR, S

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MARKER, HANNES;REEL/FRAME:004089/0014

Effective date: 19820804

AS Assignment

Owner name: MARKER INTERNATIONAL COMPANY, P.O. BOX 26548, SALT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MARKER-PATENTVERWERTUNGSGELLSCHAFT GMBH;REEL/FRAME:004906/0245

Effective date: 19880331

Owner name: MARKER INTERNATIONAL COMPANY,UTAH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MARKER-PATENTVERWERTUNGSGELLSCHAFT GMBH;REEL/FRAME:004906/0245

Effective date: 19880331