US3261615A - Safety tensioning device for ski binding cable - Google Patents

Safety tensioning device for ski binding cable Download PDF

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Publication number
US3261615A
US3261615A US345731A US34573164A US3261615A US 3261615 A US3261615 A US 3261615A US 345731 A US345731 A US 345731A US 34573164 A US34573164 A US 34573164A US 3261615 A US3261615 A US 3261615A
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cable
ski
lever
base member
control lever
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Expired - Lifetime
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US345731A
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English (en)
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Beyl Jean Joseph Alfred
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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
    • A63C9/083—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with loosenable cable strap

Definitions

  • This invention relates to tighteners or like tensioning devices adapted to keep under a proper mechanical tension a fastening cable which, in certain types of ski bindings, is passed around the heel of the ski boot for urging or holding the toe end of the ski boot in engagement against a strap or abutment.
  • Hitherto known cable tighteners devised for this specific use consist as a rule of a lever pivotally mounted about a pin extending across the ski in front of the space occupied by the boot, the fastening cable being attached to said lever with a tension spring interposed between the cable and the lever in order to keep the former under an elastic tension.
  • the point of anchorage of the front end of the cable is so positioned that, with due account for the direction of movement of the lever to its set position, the lever is then kept automatically in this position.
  • tensioning devices of this character which incorporate a cable-tensioning lever so disposed as to be raised automatically when an abnormally high effort is exerted on the skiers leg, thus releasing the cable, for instance in case of forward fall.
  • the device comprises either a complementary mechanism adapted automatically to raise the lever in the occurrence of these abnormal conditions, or some special mounting of such lever with a view to remove the lever stability in the closed or set position and thus raise the lever automatically to release the cable
  • Other safety tightening devices are known which are based on different principles.
  • the lever cannot remain by itself in a stable manner in the set position, but is retained in this position by some type of locking or anchoring member or mechanism adapted to release it in case an abnormally high tension is applied to the cable.
  • the first solution consists in so adjusting the device that the cable will be released very rapidly, with the consequent risk of producing an untimely release of the skiers boot, for example in case of moderate tractive efforts.
  • the second solution consists on the other hand in adopting the opposite adjustment, and in this case the risk is that the skiers foot remains attached to the ski in case of dangerous efforts.
  • the device of this invention comprises a control lever pivotally mounted on a pivot pin extending across the ski ahead of the skiers boot, the safety cable being attached to this lever.
  • this improved device is characterized essentially in that it comprises a spring-loaded mechanism providing an elastic connection between the aforesaid pivoting lever and the base member carrying its pivot pin, said springloaded mechanism constantly urging said lever to its nor mal operative or down position in which the cable is properly tensioned. Under these conditions the springloaded mechanism will ensure both the normal cable tension and the automatic release of the cable in case of an abnormally high tensional eifort were applied to the skiers leg, since in this case the lever can pivot against the elastic resistance of this mechanism.
  • the spring-loaded elastic mechanism connecting the pivoting lever to the fixed base member supporting same consists of a piston slidably mounted in a cylinder-forming cavity formed in one of these two elements, this piston being urged by spring means against a cam-forming flat seat provided on the other element, the plane of said fiat seat being so disposed that the thrust exerted by the piston on said seat constantly tends to hold or return said pivoting lever to its set position corresponding to the tensioning of said cable.
  • FIGURE 1 is a fragmentary side elevational view showing a ski equipped with a safety cable tensioning device constructed according to the teachings of this invention
  • FIGURE 2 is a view similar to FIGURE 1 showing the operation of the device when a stretching effort is exerted on the skiers foot;
  • FIGURE 3 is a side elevational view showing the same device on a larger scale
  • FIGURE 4 is a plan view from above of the device shown in FIGURE 3;
  • FIGURE 5 is a cross-sectional view of the device, the section being taken upon the line V--V of FIGURE 3;
  • FIGURE 6 is a longitudinal section taken upon the line VI-VI of FIGURE 4 and illustrating the tightener during its operation;
  • FIGURE 7 is a side elevational view showing a modified embodiment of the tightening device
  • FIGURES 8 and 9 are longitudinal sections similar to FIGURE 6 but showing two different forms of embodiment of the tensioning device.
  • FIGURES l0 and 11 are a longitudinal section and a plan view from above, respectively of a different form of embodiment of the device of this invention.
  • the cable tightener or tensioning device of this invention is designed for maintaining under an elastic tension a fastening or binding cable 1 forming a loop around the heel of a ski boot C so as to urge the latter forwards against a fixed strap or front safety stop or knock-off member B.
  • the tightener illustrated in FIGURES 1 to 6 of the attached drawings comprises a control lever 4 pivotally mounted about a fixed pivot pin 5 extending across the ski S ahead of the location of the boot on the ski surface.
  • This pivot pin is carried by a fixed base member 6 consisting for example of a pair of lateral straps secured on the ski, on either side of control lever 4, the upper horizontal portion of each strap fitting in a diametral slot 7 formed in the corresponding end of pivot pin 5, so that the latter is 'held against rotation about its axis.
  • the lever 4 consists of a hollow member formed with a transverse bore 7a open on both sides and receiving the pin 5 for the pivotal mounting of this lever.
  • This lever is also provided with a longitudinal cavity communicating with the transverse bore 7a and serving as a cylinder to a sliding piston 9 having a stem surrounded by a coil compression spring '10 bearing with one end against said piston 9 and with the opposite end against a screw plug 11 closing the cylinder-forming cavity 8 and permitting the adjustment of the spring pressure.
  • a cam-forming fiat seat 12 adapted to be engaged by the piston 9.
  • the plane of this fiat seat is substantially perpendicular to the top surface of the ski.
  • the front end of the ski-boot binding cable 1 forms a loop 1a (FIGURE 3) around the body of lever 4.
  • the end of this loop underlies the lower surface of this lever body, and its sides pass over a pair of corresponding shoulders '13 formed on the upper portion of the lever (body and laterally thereto.
  • these two shoulders have the shape of circular arcs centered on the point *0 coincident with the axis of the fixed pivot pin 5.
  • the upper face of each semi-circular shoulder 13 is provided with a groove engaged by the corresponding portion of the cable loop.
  • the body of lever 4 acts somewhat like a pulley or winch drum for winding the front end of the cable.
  • the length of cable 1 is so adjusted that it can exert the desired forward pull on the ski boot and urge the latter against the toe stop device B when the lever 4 is in its forward down position corresponding actually to the cable tensioning position.
  • the cable length is so adjusted that the piston 9 does not bear completely on the fiat seat 12 when the boot heel engages the top surface of the ski.
  • the tightener of this invention permits a partial lifting of the boot heel, to an extent sufficient to avoid the detrimental consequences of a complete locking of the heel on the ski.
  • the tightening device of this invention is characterized by several advantageous features with respect to hitherto known safety tighteners:
  • this device does not provide an increasing resistance to the upward movement of the skiers heel.
  • the return force exerted by the mechanism conmeeting the pivoting lever to the fixed base member remains practically constant for, as spring 10 is compressed by the backward movement of piston 9 in its cavity, the angle formed between this piston and its flat seat 12 increases.
  • the tightening device provides an approximately constant resistance and the boot is finally released but not abruptly as in hitherto known devices of this character, thus avoiding an objectionable acceleration of the forward fall movement of the skier.
  • the mounting of the cable 1 on the semi-circular shoulders 13 is advantageous in that the lever arm through which the return force is exerted has a constant length.
  • This feature is particularly advantageous in that it avoids the untimely releases frequently observed with conventional or known devices in case of relatively moderate efforts.
  • the adjustment of the safety cable tensioning device of this invention is particularly easy in that it consists simply in modifying the compressive force of spring 10 by screwing the plug 11 in or out, after having adjusted the cable 1 to the desired length.
  • the tightening device of this invention is particularly simple to operate.
  • the user simply raises the lever 4 by rotating same in the direction of the arrow F against the action of the return mechanism, in order to release enough cable 1 to this end.
  • the lever 4 By subsequently releasing the lever 4 it resumes automatically its normal down position under the control of the return mechanism, thus tensioning the cable.
  • the two sides of the loop 1a formed by the front end of the cable may be assembled by means of a connecting member or bridge piece 14 (see FIGURES 3 and 4) to prevent the cable from escaping fromthe grooves of shoulders 13 of the lever body.
  • a strap or like member 25 may be provided under said lever.
  • the fastening cable 1 utilised in conjunction with the tightening device of this invention comprises means permitting an easy and quick adjustment of its useful length, in order to ensure a proper adherence of the ski boot on the ski.
  • Various known and suitable means may be provided to this end.
  • the base member 6 of the tightening device is mounted in slideways to permit the adjustment of its position in the longitudinal direction of the ski.
  • These slideways may comprise in this case mean-s for safely locking the base member in the desired position of adjustment.
  • the pivot pin 5 of control lever 4 may be so mounted on the base member 6 as to be movable in the longitudinal direction of the ski for adjusting the useful length of the cable; in this case, the base member may be mounted at a fixed location on the ski.
  • FIGURE 7 shows in this connection a modified embodiment wherein the front end of the fastening cable 1d is attached by means of a suitable anchor element on a lug 20 carried by the upper face of the pivoting lever 4d of the device.
  • this tensioning device is exactly similar to that shown in FIGURES 1 to 6.
  • the anchor element for attaching the front end of the cable may consist of a screw-threaded shank 21 engaging a tapped hole formed in a lug or nut 22 carried by another screw-threaded shank 23 engaging a corresponding tapped hole formed in the lug 20.
  • the adjustment of the useful length of cable 1d may be effected by screwing the shank 21 in one or the other direction.
  • FIGURE 8 illustrates a further modified form of em bodiment of the device wherein the tension adjuster is so designed that the user has to rotate the lever 4 backwards for tensioning the fastening cable 12.
  • the general structure of .the device does not differ appreciably from that shown in FIGURES 1 to 6, except that the flat tace Reformed on the fixed pivot pin 52, which constitutes a cam-face engageable by the piston 9, is formed on the rear face instead of the front face of the pin.
  • the elastic return mechanism will constantly urge the control lever 4 to its backward folded position.
  • the front end of cable 1e must be mounted in a different way on this lever, for example as shown in FIGURE 8, so that the rotation of this lever in the direction of the arrow F will actually wind and tension the cable.
  • the sliding piston of the elastic return mechanism is always mounted in the piston-forming bore of the hollow body constituting the control lever of the device, and the flat seat co-acting with this piston is formed on the fixed pin on which the lever is .pivoted.
  • the relative arrangement of these two essential component elements of the return mechanism may be inverted, if desired.
  • FIGURE 9 illustrates another form of embodiment wherein the pivoting lever 41 carries a cross pin or trunnion 5f acting as a pivot.
  • This pin is jonrnalled in a transverse bore 7 formed in a base member consisting of a hollow body 6f secured on the ski top.
  • the bore 7f opens on either side of this base member and the two ends of pin 5 are solid with side flanges 24 of lever 41.
  • the piston 91 of the elastic return mechanism is slidably mounted in a longitudinal cavity 81 formed in the fixed base member 6f. This cavity is closed by a screw plug 11) for adjusting the compression spring acting upon the piston 9f.
  • the flat seat 12 co-acting with this piston is formed in this case on the front face of the rotary pin 5 in a plane substantially perpendicular to the upper face of lever 41.
  • this tightener may be mounted the opposite way on the ski, as well as the tightener shown in FIGURE 10, so that its lever be rotated backwards to its cable-tensioning position.
  • the relative arrangement of the base member and lever may also be reversed so that the body of the base member lies on the side opposite to that toward which the lever is rotated to assume its cabletensioning position.
  • FIGURES l0 and 11 illustrate another form of embodiment wherein the elastic mechanism urging the lever 4g to its cable-tensioning position consists simply of a torsion spring 26 disposed around the fixed pivot pin 5g of said lever, within the transverse bore 7g formed therein.
  • One end 26a of the torsion spring is anchored on the pivot pin and the opposite end 2611 is attached to the lever 4g proper.
  • This spring will thus constantly urge the lever toward the top face of the ski in order to tension the cable (not shown).
  • the tightener thus constructed operates substantially like the one illustrated in FIGURES l to 6 of the drawings. I
  • a safety tensioning device for ski binding cable comprising a base member adapted to be secured on the ski; a fixed pivot pin solid with said base member, which is parallel and perpendicular to the ski; a control lever pivotally mounted on said pivot pin and adapted to be rotated in a predetermined direction in relation to said cable in order to move toward said ski and to tension said cable; means for attaching said cable on said control lever, said means being such that the rotation of said control lever towards the ski in said predetermined direction will tension said cable; a transverse bore formed in said control lever and receiving said fixed pivot pin, and a cavity extending at right angles to and opening into said bore; a piston slidably mounted in said cavity; on said fixed pivot pin, a flat cam-forming seat lying in a plane substantially perpendicular to the axis of said cavity when said lever is rotated home toward the ski in said predetermined direction, in said cavity a compression spring urging said piston against said flat seat, whereby said piston will constantly tend to rotate said control lever toward its ski-ward position corresponding to
  • a safety tensioning devce for ski binding cable comprising a base member adapted to be secured on the ski; a pivot pin journaled in said base member, which is parallel and perpendicular to the ski; a control lever rigid with said pivot pin, and adapted to be rotated in a predetermined direction in relation to said cable in order to move towards said ski and to tension said cable; means for attaching said cable on said control lever, said means being such that the rotation of said control lever toward the ski in said predetermined direction will tension said cable; a transverse bore formed in said fixed base member, in which said pivot pin of said control lever is rotatably mounted; in said base member, a cavity extending at right angles to and communicating with said bore; a piston slidably mounted in said cavity; on said pivot pin, a cam-forming fiat seat lying in a plane substantially perpendicular to the axis of said cavity when said lever is rotated towards the ski in said predetermined direction; in said cavity, a compression spring urging said piston against said flat seat, whereby said piston
  • a safety tensioning device for ski binding cable comprising a base member adapted to be secured on the ski, a control lever pivotally mounted on a pivot pin carried by said base member and extending across and parallel to the ski, said control lever being adapted to be rotated toward the ski on the side opposite to said binding cable, means for anchoring said cable on said control lever and such that when said lever is rotated towards the ski and away from said cable said binding cable is tensioned, elastic means connecting said control lever to said base member, said elastic means comprising a spring within said lever and being adapted to constantly and resiliently urge said lever to its ski-engaging position away from said cable, said means permitting however the rotation of said control lever in the opposite direction in case a tractive eilort of predetermined value is exerted on said cable in the direction away from said base member, and wherein said control lever is formed on the side of said pivot pin with a pair of grooves in the form of. circular arcs disposed each on one side of said control lever and having their centre coincident with the axis of said pivot
  • a safety tensioning device for ski binding cable comprising a base member adapted to be secured on the ski, a control lever pivotally mounted on a pivot pin carried by said base member and extending across and parallel to the ski, said control lever being adapted to be rotated toward the ski on the side opposite to said binding cable, means for anchoring said cable on said control lever and such that when said lever is rotated towards the ski and away from said cable said binding cable is tensioned, elastic means connecting said control lever to said base member, said elastic means comprising a piston slidably mounted in a cavity formed in one of said two connected elements, a flat seat formed on the other element and registering with said piston, spring means urg- 5i ing said piston against said cam-forming flat seat, the plane of said flat seat being so directed that the thrust exerted by said piston against said seat due to said spring means will constantly urge said pivoting control lever to its cable-tensioning position toward the ski.
  • a safety tensioning device for ski binding cable comprising a base member adapted to be secured on the ski, a control lever pivotally mounted on a pivot pin carried by said base member and extending across and parallel to the ski, said control lever being adapted to be rotated toward the ski on the side of said binding cable, means for anchoring said cable on said control lever and such that when said lever is rotated toward the ski and toward said cable said binding cable is tensioned, elastic means connecting said control lever to said base member, said elastic means comprising a piston slidably mounted in a cavity formed in one of said two connected elements, a flat seat formed on the other element and registering with said piston, spring means urging said piston against said cam-forming flat seat, the plane of said flat seat being so directed that the thrust exerted by said piston against said seat due to said spring means will constantly urge said pivoting control lever to its cabletensioning position toward the ski.

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US345731A 1963-02-18 1964-02-18 Safety tensioning device for ski binding cable Expired - Lifetime US3261615A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR925164A FR1357018A (fr) 1963-02-18 1963-02-18 Tendeur de sécurité pour câble de fixation de ski

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US3261615A true US3261615A (en) 1966-07-19

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US345731A Expired - Lifetime US3261615A (en) 1963-02-18 1964-02-18 Safety tensioning device for ski binding cable

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US (1) US3261615A (hu)
AT (1) AT260747B (hu)
CH (1) CH396724A (hu)
DE (1) DE1428869A1 (hu)
FR (1) FR1357018A (hu)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060001240A1 (en) * 2004-06-30 2006-01-05 Ben Walker Ski binding
US20150119204A1 (en) * 2013-10-31 2015-04-30 R Joel Loane Ski Exersize Apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR671329A (fr) * 1928-03-12 1929-12-11 Attache pour skis
CH166826A (de) * 1932-01-23 1934-01-31 Forster Jakob Skibindung mit federndem Vordergelenk.
CH261406A (de) * 1947-07-11 1949-05-15 Brunschweiler & Co A Skibindung.
FR1034246A (fr) * 1951-03-21 1953-07-21 Tendeur de sécurité pour fixation de ski
US3027173A (en) * 1957-12-23 1962-03-27 Beyl Jean-Joseph Alfred Safety ski binder
FR1294261A (fr) * 1961-04-13 1962-05-26 Dispositif de fixation de sécurité pour ski

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR671329A (fr) * 1928-03-12 1929-12-11 Attache pour skis
CH166826A (de) * 1932-01-23 1934-01-31 Forster Jakob Skibindung mit federndem Vordergelenk.
CH261406A (de) * 1947-07-11 1949-05-15 Brunschweiler & Co A Skibindung.
FR1034246A (fr) * 1951-03-21 1953-07-21 Tendeur de sécurité pour fixation de ski
US3027173A (en) * 1957-12-23 1962-03-27 Beyl Jean-Joseph Alfred Safety ski binder
FR1294261A (fr) * 1961-04-13 1962-05-26 Dispositif de fixation de sécurité pour ski

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060001240A1 (en) * 2004-06-30 2006-01-05 Ben Walker Ski binding
US7216890B2 (en) * 2004-06-30 2007-05-15 Black Diamond Equipment, Ltd. Ski binding
US20150119204A1 (en) * 2013-10-31 2015-04-30 R Joel Loane Ski Exersize Apparatus
US9186543B2 (en) * 2013-10-31 2015-11-17 R. Joel Loane Ski exersize apparatus
US9339687B2 (en) * 2013-10-31 2016-05-17 R Joel Loane Ski exercise apparatus

Also Published As

Publication number Publication date
FR1357018A (fr) 1964-04-03
DE1428869A1 (de) 1968-12-12
CH396724A (fr) 1965-07-31
AT260747B (hu) 1968-03-25

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