US3786579A - Adjustable crampons - Google Patents

Adjustable crampons Download PDF

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Publication number
US3786579A
US3786579A US00327465A US3786579DA US3786579A US 3786579 A US3786579 A US 3786579A US 00327465 A US00327465 A US 00327465A US 3786579D A US3786579D A US 3786579DA US 3786579 A US3786579 A US 3786579A
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United States
Prior art keywords
bars
adjustable
crampon
overlap
members
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Expired - Lifetime
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US00327465A
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English (en)
Inventor
J Clark
L Gearheard
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SEATTLE Manufacturing CORP
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SEATTLE Manufacturing CORP
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
    • A43C15/00—Non-skid devices or attachments
    • A43C15/06—Ice-gripping devices or attachments, e.g. ice-spurs, ice-cleats, ice-creepers, crampons; Climbing devices or attachments, e.g. mountain climbing irons
    • A43C15/068—Climbing devices or attachments, e.g. glacier crampons, mountain climbing irons

Definitions

  • ABSTRACT An adjustable crampon with a frame which is articulated for width adjustment and has extensible rear frame members for length adjustment, and is made rigid after being fitted to a given boot.
  • the present invention relates to adjustable crampons applied to climbing boots for alpinism, ice climbing, walking on icy surfaces, and other mountaineering pursuits, and more particularly, relates to rigid type crampons as distinguished from the hinged type.
  • the rigid type the full length of the crampon is a rigid frame
  • the hinged type shown for example in US. Pat. No. 3,685,173
  • the portions of the crampon beneath the boot heel is free to flex relative to the portion beneath the sole.
  • Some rigid type crampons have been made adjustable in the past both in length and width to accommodate a range of boot sizes and sole shapes, but the adjustment system has had the drawback of not being such as to make it possible to adjust for the full expanse of boot widths in such a manner as to locate the depending point elements substantially as far out laterally as the extent of the boot sole, particularly in the region of the widest part of the boot.
  • Such a point location is vital so that the climber, especially when having to make footing on a narrow ledge or step, can locate crampon points close to the inner side of the ledge without interference by way of engagement of the side of the boot sole with the adjoining rock or ice wall.
  • An important object of the present invention is to eliminate the above-mentioned drawback in the rigid crampons of the known adjustable types.
  • Another object is that of providing an adjustable crampon that is sturdy and safe to use and yet can be economically produced.
  • FIG. I is a bottom perspective view of the crampon in operative position in a boot shown in phantom;
  • FIG. 2 is a top plan view of the crampon
  • FIG. 3 is a longitudinal vertical sectional view taken along the line 3-3 of FIG. 2;
  • FIG. 4 is a detail fragmentary bottom plan view of one of the center articulations as indicated by line 4-4 in FIG. 3;
  • FIG. 5 is a transverse cross-sectional view to the rear taken along the line 5-5 of FIG. 2;
  • FIG. 6 is a transverse cross-sectional view to the front taken along the line 6-6 of FIG. 2.
  • the crampon is provided with three pairs of strap posts 30-31, 32-33 and 34-35 at the rear, center and front, respectively. Each of these has a slot 36 for receiving a lace style crampon strapping for holding the crampon onto a boot in the conventional manner. It will be noted that the rear strap posts 30-31 diverge in the forward direction to serve as a rear stop for the boot heel and that the front strap posts converge in the forward direction.
  • the point elements are integral extensions of rear, center and front pairs of longitudinal frame members 38-39, 46-41 and 42-43, respectively, which are interconnected by a pivot screw 44 at the rear, a two-piece adjustable cross-link 46-47 at the center, and a pivot screw 48 at the front. Also integral with the rear members 38-39 and front members 42-43 are the rear strap posts 30-31 and front strap posts 34-35, respectively.
  • the center strap posts 32-33 upstand integrally from the outer ends of the adjustable center cross-links 46-47. It is preferred that frame members and crosslinks of the crampon be formed from high strength chrome molybdenum steel.
  • the rear frame members 38-39 are each provided with a longitudinal row of equally spaced holes 50 from a straight section forwardly of the points 22-23, and the center frame members 40-41 are perforated along most of their length with holes 51 spaced apart in like manner to the holes 50.
  • Two pairs of screws 52-53 and 54-55 passing through mating of the holes 50, 51 are used to rigidly clamp the center and rear frame members together in adjusted position with the front portion of the rear members 38-39 overlapping a rear portion of the center members 40-41.
  • Width adjustment of the crampon at the front and back is accomplished by respective sets of matching holes 56 and 57 formed in lateral front extensions 42a-43a and rear extensions 38a-39a. So that both sides of the crampon will be at the same sole level, the lateral extensions 38a and 42a are offset downwardly to extend beneath the extensions 39a and 43a, respectively, as shown in FIGS. 5 and 6. Similarly, the rear end portions of the front members 42-43 are offset downwardly, as indicated at 43a for member 43 in FIG. 3, to extend beneath the forward end portions of the center members 411-41 to receive therethrough pivot screws 58-59 and set screws 60-61 threaded into overlying holes in the center members. The set screws 60-61 pass through lateral slots 62-63 as best seen in FIG. 4. It will be noted that the center member 4 0 may be straight throughout its length whereas the other center member 41 bends outwardly forwardly of the point element so as to complement the curved shape of the rear portion of the respective front member 43.
  • the center cross-links 46-47 overlap, the cross-link 46 being downwardly offset at 46a to pass beneath the cross-link 47.
  • the overlapped portions have respective rows of holes 62-63 along their length for receiving a center adjusting screw 64 and side adjusting screws 66-67, the latter two passing through selected of the holes 51 in the center members 40-41.
  • There is a differential spacing between the two sets of holes 62-63 so that small endwise adjustments of the center crosslinks 46-47 will always place two of these holes in registration to receive the screw 64.
  • the upper sets are tapped from beneath and the lower sets are clearance holes.
  • the screws are threaded into their respective holes from the underside to leave flat top surfaces. It is preferred that the screws be of the allen head type.
  • the width at the front and rear are first-set by adjusting the screws 48 and 44 in the respective holes 56-57 so that the front points 18-19 project the desired amount forwardly of the toe of the boot when the boot is jammed against the front posts 34-35, and so that the rear posts -31 bear against the rear rounded corner portions of the heel.
  • the front adjustment is made after the center sections -41 have been connected to the front sections by the screws 58 through 61, but that is optional. Howbeit, usually the crampon is next adjusted for length and the locking screws 52 through set in place to rigidly secure the center and rear members together.
  • the crampon frame is articulated as a four bar closed linkage such as to locate the points 26-27 beneath the outer edge of the widepart of the boot sole. Then the fore-going six screws are tightened. To securely lock this adjustment the cross-links 46-47 are then positioned with the center strap posts 32-33 at the proper instep location and the screws 64, 66 and 67 set and tightened in place. With all of the screws tightened the crampon frame is not only locked against articulating but is rigid in the vertical direction. This rigidity is assisted by having central longitudinal ribs 68 formed at the underside of the front members 42-43.
  • the crampon frame comprises a closed four-bar linkage in which the rear member 38 and center member 40 together are a first link, the other rear member 39 and center member 41 together are a second link, and the front members 42-43 are the other two links, and in which the four articulations of the linkage are the screws 44, 48, 58 and 59.
  • the first and second links, and hence the entire linkage, is locked by the cross-link assembly 46-47.
  • the effective length of the linkage is adjusted by varying the lengths of the first two links, and namely by changing the registration of the sets of holes 50 and 51 and shifting the screws 52 through 54 accordingly.
  • the width across the widest part of the other two links 42-43 of the four-bar linkage is varied by laterally expanding or retracting the linkage by articulating it with the cross-link assembly 46-47 disconnected.
  • the cross-link assembly not only serves to lock the linkage after adjustment but also permits ready adjustment of the center strap posts lengthwise of the crampon.
  • the design of the parts is such as to provide production economies.
  • a right foot crampon has been illustrated in the drawing.
  • the rear elements 38-39 can remain unchanged, and the center cross-links 46-47, center members 40-41 and front members 42-43 need only be turned over during fabrication and the respective point elements and posts bent in the opposite directions from the right foot version.
  • the present invention not only provides a rigid crampon with great versatility of adjustment, but also provides a unit that only requires a minimum of parts and fabrication dies to manufacture a right and left pair.
  • a crampon according to the present invention can be applied to a large variety of boot types, sizes and dimensions in a simple, safe and reliable manner insuring that the point elements 26-27 can always be at least as far out laterally as the overlying outer edge portions of the boot.
  • An adjustable crampon comprising:
  • a closed four-bar articulated linkage having two front and two rear bars with integral point elements depending at their outer edges and the front bars being shaped to generally conform with the periphery of a boot sole, forwardly of the instep,
  • length adjusting means for adjusting the length of the two rear bars
  • adjustable-length cross-link means laterally interconnecting the two rear bars between said length adjusting means and said front bars for locking the linkage after the width between the rear ends of the front bars had been adjusted.
  • An adjustable crampon comprising:
  • an elongated open frame assembly providing around its periphery a plurality of depending points and providing front and rear upstanding boot engaging means near its opposite ends,
  • articulating means for selectively varying the central width of the frame assembly relative to the width of the frame assembly near its ends
  • locking means including laterally extending means of adjustable effective length operatively connected to the frame assembly for making the crampon rigid after width adjustment.
  • An adjustable crampon according to claim 11 in which said laterally extending means is adjustable in location endwise of the frame assembly independently of said extensible means and has upstanding means at its ends independent of said front and rear means for con necting to boot attaching means.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00327465A 1973-01-29 1973-01-29 Adjustable crampons Expired - Lifetime US3786579A (en)

Applications Claiming Priority (1)

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US32746573A 1973-01-29 1973-01-29

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US (1) US3786579A (enrdf_load_stackoverflow)
JP (1) JPS5351261Y2 (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947571A1 (de) * 1979-01-19 1980-07-31 Salewa Gmbh Sportgeraetefab Aufbau eines steigeisens und verfahren zur befestigung des steigeisens
EP0083050A1 (de) * 1981-12-29 1983-07-06 Paul Werne Orthopädischer Sohlenuntersatz
US4480396A (en) * 1979-01-19 1984-11-06 Lowe Greg E Crampon construction and method of attachment
EP0334299A1 (de) * 1988-03-23 1989-09-27 GEORG GABRIEL & SOHN Steigeisen
US5729912A (en) * 1995-06-07 1998-03-24 Nike, Inc. Article of footwear having adjustable width, footform and cushioning
US5732483A (en) * 1995-07-17 1998-03-31 Skis Rossignol S.A. Shoe for the practice of snowboarding
US5867922A (en) * 1997-02-28 1999-02-09 Zoomers Noise reducing footwear
US6449878B1 (en) 2000-03-10 2002-09-17 Robert M. Lyden Article of footwear having a spring element and selectively removable components
US20030135306A1 (en) * 2001-11-16 2003-07-17 Driscoll Joseph T. Rotor torque predictor
US6601042B1 (en) 2000-03-10 2003-07-29 Robert M. Lyden Customized article of footwear and method of conducting retail and internet business
US6766597B1 (en) * 2002-03-26 2004-07-27 Zedel Ice spike for mountaineering comprising a lengthwise adjustment device
US20040231200A1 (en) * 2003-01-30 2004-11-25 Forrest William Edwin Frame and binding for a snowshoe, and related systems and methods
US7016867B2 (en) 2000-03-10 2006-03-21 Lyden Robert M Method of conducting business including making and selling a custom article of footwear
US7107235B2 (en) 2000-03-10 2006-09-12 Lyden Robert M Method of conducting business including making and selling a custom article of footwear
US20070043630A1 (en) * 2000-03-10 2007-02-22 Lyden Robert M Custom article of footwear and method of making the same
US20130180130A1 (en) * 2012-01-16 2013-07-18 Kahtoola, Inc. Footwear accessory binding system
US20170304710A1 (en) * 2014-06-20 2017-10-26 Philippe Gallay Attachment for holding a boot on a snowshoe
WO2021234237A1 (fr) * 2020-05-19 2021-11-25 Blue Ice Europe Crampon à glace
USD952309S1 (en) * 2021-07-07 2022-05-24 Hk Sanli Trading Co., Limited Crampon for footwear
USD996026S1 (en) * 2022-06-16 2023-08-22 Yongsheng He Climbing crampon
EP4501163A1 (en) * 2023-08-03 2025-02-05 Camp S.p.A Costruzione Articoli Montagna - Premana Connection system for crampons

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4521689B2 (ja) * 2006-10-25 2010-08-11 株式会社シューターズ 身障者用歩行補助靴

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350197A (en) * 1919-12-22 1920-08-17 Wood Walter Attachment for shoes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5121869U (enrdf_load_stackoverflow) * 1974-08-08 1976-02-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350197A (en) * 1919-12-22 1920-08-17 Wood Walter Attachment for shoes

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947571A1 (de) * 1979-01-19 1980-07-31 Salewa Gmbh Sportgeraetefab Aufbau eines steigeisens und verfahren zur befestigung des steigeisens
US4480396A (en) * 1979-01-19 1984-11-06 Lowe Greg E Crampon construction and method of attachment
EP0083050A1 (de) * 1981-12-29 1983-07-06 Paul Werne Orthopädischer Sohlenuntersatz
EP0334299A1 (de) * 1988-03-23 1989-09-27 GEORG GABRIEL & SOHN Steigeisen
US5729912A (en) * 1995-06-07 1998-03-24 Nike, Inc. Article of footwear having adjustable width, footform and cushioning
US5732483A (en) * 1995-07-17 1998-03-31 Skis Rossignol S.A. Shoe for the practice of snowboarding
US5867922A (en) * 1997-02-28 1999-02-09 Zoomers Noise reducing footwear
US20070043630A1 (en) * 2000-03-10 2007-02-22 Lyden Robert M Custom article of footwear and method of making the same
US8209883B2 (en) 2000-03-10 2012-07-03 Robert Michael Lyden Custom article of footwear and method of making the same
US6601042B1 (en) 2000-03-10 2003-07-29 Robert M. Lyden Customized article of footwear and method of conducting retail and internet business
US7770306B2 (en) 2000-03-10 2010-08-10 Lyden Robert M Custom article of footwear
US7752775B2 (en) 2000-03-10 2010-07-13 Lyden Robert M Footwear with removable lasting board and cleats
US7016867B2 (en) 2000-03-10 2006-03-21 Lyden Robert M Method of conducting business including making and selling a custom article of footwear
US7107235B2 (en) 2000-03-10 2006-09-12 Lyden Robert M Method of conducting business including making and selling a custom article of footwear
US6449878B1 (en) 2000-03-10 2002-09-17 Robert M. Lyden Article of footwear having a spring element and selectively removable components
US20080060220A1 (en) * 2000-03-10 2008-03-13 Lyden Robert M Custom article of footwear, method of making the same, and method of conducting retail and internet business
US20030135306A1 (en) * 2001-11-16 2003-07-17 Driscoll Joseph T. Rotor torque predictor
US6766597B1 (en) * 2002-03-26 2004-07-27 Zedel Ice spike for mountaineering comprising a lengthwise adjustment device
US20040231200A1 (en) * 2003-01-30 2004-11-25 Forrest William Edwin Frame and binding for a snowshoe, and related systems and methods
US12193544B2 (en) * 2012-01-16 2025-01-14 Kahtoola, Inc. Footwear accessory binding system
US20130180130A1 (en) * 2012-01-16 2013-07-18 Kahtoola, Inc. Footwear accessory binding system
US10136702B2 (en) * 2012-01-16 2018-11-27 Kahtoola, Inc. Footwear accessory binding system
US20170304710A1 (en) * 2014-06-20 2017-10-26 Philippe Gallay Attachment for holding a boot on a snowshoe
WO2021234237A1 (fr) * 2020-05-19 2021-11-25 Blue Ice Europe Crampon à glace
FR3110356A1 (fr) * 2020-05-19 2021-11-26 Blue Ice Europe Crampon à glace
US12213563B2 (en) 2020-05-19 2025-02-04 Blue Ice Europe Ice crampon
USD952309S1 (en) * 2021-07-07 2022-05-24 Hk Sanli Trading Co., Limited Crampon for footwear
USD996026S1 (en) * 2022-06-16 2023-08-22 Yongsheng He Climbing crampon
EP4501163A1 (en) * 2023-08-03 2025-02-05 Camp S.p.A Costruzione Articoli Montagna - Premana Connection system for crampons

Also Published As

Publication number Publication date
JPS49116277U (enrdf_load_stackoverflow) 1974-10-04
JPS5351261Y2 (enrdf_load_stackoverflow) 1978-12-07

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