CA1106417A - Running surface for skis resp. for running bases and method for producing said running surface - Google Patents
Running surface for skis resp. for running bases and method for producing said running surfaceInfo
- Publication number
- CA1106417A CA1106417A CA298,646A CA298646A CA1106417A CA 1106417 A CA1106417 A CA 1106417A CA 298646 A CA298646 A CA 298646A CA 1106417 A CA1106417 A CA 1106417A
- Authority
- CA
- Canada
- Prior art keywords
- running surface
- ribs
- profilings
- ski
- running
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/04—Structure of the surface thereof
- A63C5/0428—Other in-relief running soles
Landscapes
- Coating Apparatus (AREA)
- Road Paving Structures (AREA)
- Motorcycle And Bicycle Frame (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Tires In General (AREA)
Abstract
RUNNING SURFACE FOR SKIS RESP. FOR RUNNING BASES
AND METHOD FOR PRODUCING SAID RUNNING SURFACE
ABSTRACT OF THE DISCLOSURE
The invention relates to a running surface for skis whereby at least one portion of the running surface is provided with profilings, such as steps or scales, and with ribs extending in the longitudinal direction of the ski, said ribs surmounting the surfaces of the profilings and terminating above a planar portion of the profilings with a backward directed face.
AND METHOD FOR PRODUCING SAID RUNNING SURFACE
ABSTRACT OF THE DISCLOSURE
The invention relates to a running surface for skis whereby at least one portion of the running surface is provided with profilings, such as steps or scales, and with ribs extending in the longitudinal direction of the ski, said ribs surmounting the surfaces of the profilings and terminating above a planar portion of the profilings with a backward directed face.
Description
sackground of the Invention Field of the Invention The invention relates to a running surface for skis, whereby at least one portion of the running surface is provided with profilings, such as steps or scales which have surfaces rising at least partially in the back-ward direction, and with ribs extending in the longitudinal direction of the ski.
Description_of the Prior Art lQ A ski of the above-mentioned kind has, for ex ample, already been described in the Austrain patent No. 330.625. Further suggestions have also been made to provide the running surface of the ski with pro-filings, such as scales or steps, which offer far less resistance against forward gliding than against back-ward sliding (e.g. United States Patent No. 3.408.086, laid open German Specification 1.954.075). ~unning surfaces of this kind are first of all intended for cross-country skis. Scaled or stepped running bases which ~0 haye been known so far either pro-vide satisfactory glid-ing characteristics for the forward gliding bu~ at the same time insufficient resistance against backward sliding (climbing characteristics~ or they provide suffIcient climbing characteristics kut insufficient gliding char-acteristics for foward gliding.
It was the obiect of seyeral known suggestions with regard to stepped or scaled running bases to improve the tracking of the ski by a special arrangement of the profilings of the running surface, i.e. in such a way that the usual central guiding groove can be omitted or be of very shallow cross-section.
A former suggestion (Austrian Patent No.
151.363) pro~ides a stepped running surface and breaking and guiding members on the individual steps, said members haying a skid-shaped edge at their front end and a break-ing tip at their rear end. Such a construction of the 10. running surface should not only prevent backward sliding when climbing upwards but aboye all provide a better guiding of the ski on crus.ty or icy tracks, the skid-shaped edges of the breaking and guiding mem~ers obvious-ly having or complementing the function of gripping means . on crusty tracks.
.
Summary o the I.nyention It is the object of the present invent~on to produce running surfaces for sk~s for cross-country skis in particular, which come close to an ideal relation be-tween satisfactory forward gliding characteristics and sufficient resistance against backward s~.iding on the one : hand and which, on the other hand, makes the guiding of : :
, - .
`: :
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the ski (tracking) possible without the usual central guiding groove or im-proves the guiding in addition to one (or several longitudinally extending) guiding groove(s).
The invention provides a running surface for skis, at least part of the running surface being provided with two kinds of profilings compris-ing:
a) first profilings, having surfaces with an inclined front portion rising in the backward direction of the ski and a planar rear portion that is parallel to the major plane of the running surface, and b) second profilings in the form of ribs extending in the longi-tudinal direction of the ski, said ribs surmounting at lcast said planar rear portion of the surface of said first profilings by a substantia~ly constant height (c) with respect to the surface of said first profilings, and said ribs terminating above said planar rear porticn of the surface of said first profilings in a rearwardly directed face.
According to another aspect of the invention, there is provided a method for producing a r~mning surface of skis, the latter having at least one part of a running surface provided with two kinds of prcfilings, com-prising the steps of: providing a plurality of longitudinally extending ribs in said running surface without cutting of said surface; and cutting the running surface transversely to produce a plurality of first profilings in the area of said longitudinally extending ribs each having a forward inclined portion and a rear planar portion.
The ribs according to the invention superi~posed on the profilings, i.e. s~ales, steps or the like, do not only influence the longitudinal guiding, i.e. the tracking of the ski, but their faces being turned into the backward direction also increase the resistance of the ski against backward sliding, also in the case of hard snow or icy tracks, without im-pairing the forward gliding characteristics to the same extent. Due to the invention the scales, steps or the like can either have a longitudinal 641~
profiling that is better suited for gliding than conventional mounting o gliding bases, thereby obtaining improved gliding characteristics for gliding forwards, the mounting characteristics remaining at least the same. It is, furthermore, possible to use a conventional arrangement of profilings pro- -viding good gliding characteristics and to improve the mounting character-istics by means of the invention. Moreover, the ribs according to the invention provide a good longitudinal guiding of the ski.
Brief Description of the Drawings _ _ .
In the following, embodiments of the invention will be described in more detail by means of the drawings without being limited thereto.
Figure 1 shows a top view of the running surface of the ski;
Figure 2 shows an enlarged view according to A of figure l;
Figure 3 shows a cross-section according to III-III of figure 2; -Figure 4 shows a longitudinal section according to IV-IV of `-figure 2;
Figure 5 shows a further enlarged section according to B of figure 4;
Figure 6 shows a section of the running surface of the ski being a different embodiment of figure 2;
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' ~ ~ :
~ -4-:
C
ti 4 17 Fig. 7 shows a top view of the running surface of the ski;
Fig. 8 ~hows an enlarged longitudinal section according to VIII VIII of fisure 7;
Fig. 9 shows a top view of the running surface of :~
the ski;
Fig. 10 shows an enlarged longitudinal section -~-according to X-X of figure 8;
Fig. 11 shows a top view of a portion of a running -surface of a running base;
Fig. 12 shows a longitudinal section of the running base according to XII-XII of figure 11;
Fig. 13 shows a top view of a portion of the running surface of a running base of a ski;
Fig. 14 shows a longitudinal section of the running base according to XIV-XIV of figure 13;
Fig. 15 shows a further-top view of the running surface of a ski;
Fig. 16 shows an enlarged portion according to C of figure 15;
Fig. 17 shows a cross-section according to XVII-XVII
of ~igure ~6; ~
Fig. 18 shows a longitudinal section according to XVIII-XVIII of figure 16; and Fig. 19 shows a further enlarged portion according to D of f igure 16.
Description of the Preferred_Embodiments In the embodiment according to figures 1 through 5 a running base 2 which is advantageously of plastics, polyethylene for example, is mounted in the lower part of the body 1 ~f the ski.
The running surface in the central portion of the ski is provided with stepped profilings which are superimposed by longitudinally extending ribs 3. The running surface of the front and rear portion of the ski has longitudinally extending ribs 4 which surmount the plane 5 of the running surface.
The stepped profilings have a surface 6 rising in the backward direction and having a planar portion in front of the step edge 7, said portion being positioned in the extension of the plane 5 of the running surface of the front and rear step-free portion of the ski~ The planar portion of the surface 6 is of great importance to good gliding characteristics of the ski resp. of its running base. The greater the length a of said planar portion, the~better the gliding characte~istics :
of the longitudinal profile of the steps. In the embodiment the ratio between length a of the planar portion of the surface 6 of the step and length b of the rising portion is, therefore, bigger than one ( b ~ 1 ) .
.
~ - 6 -In the embodiment according to figures 1 through 5 the portions of the surfaces 6 do not surmount the plane 5 of the running surface. The plane 5 -of the running surface is, however, partially ~
near step edge 7 - surmounted by the ribs 3 superimposed on the steps and by the ribs 4 in the step-free portions. . . .-The ribs 3 extend from the lowest portion of a step --~ at a constant height over the surface 6 preferably -.... -o onto the step edge 7. The height c of ribs 3 is advantageousl:y relatively reduced, i.e. less than the depth d of the steps. The height o:the ribs - ~ ~~ is, for-éxample, 0,1 to 0,3 mm, the depth of the . .-steps 0,4 to 0,6 mm. The width e of the ribs 3 .~ 15 is smaller than the width f of the gliding portions of the surface 6 positioned between two ribs (fig. 2). --This measure and, furthermore, the feature providing s-that the height c of the ribs is smaller than (or e~ual to) the depth d of the steps, and, moreover, the feature providing that the length a of the planar portion of the surface 6 is bigger than (or equal to) the length b of the rising portion of the surface 6 attribute to an ideal realization of the object of ; 25 the invention, particularly with regard to good forward gliding characteristics of the ski.
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~ 6 ~ ~ 7 The ribs 4 in the front and rear step-free portion of the ski advantageously have the same height and width~ the same distances and the same cross-sectional profile as the ribs 3 in the stepped --~ortion. Figure 3 illustrates an advantageous cross-sectional profile of the ribs 3 (and of the ribs 4). Other cross-sectional profiles of the ribs 3 resp. 4 are also possible.
.
In the embodiment according to figures 1 through 5 the ribs 3 of two adjacent steps are aligned.
Moreover, the ribs 4 of the step-free portions of the running surface are aligned with the ribs 3 of the steps. As can be seen in figure 6, the ribs 3 of two adjacent steps can also be staggered. The ribs 3 of the first step are, moreover, staggered . , .
, in respect of the ribs 4 of the step-free portion of the running surface.
... . . ...
In the embodiment according to figures 7 and 8, too, a running base 2 of plastics is mounted on the body 1 2Q ~ of the ski, the running surface of the central portion , of the ski being provided with stepped profilings which are superimposed by longitudinally extending ribs 3.
As compared to the embodIments according to figures 1 through 5, figures 7 and 8 illustrate that the , ... . . . . . .. . . . . . .. . .
5tep-free portions of the running surface have the usual central guiding groove 8. (Several longitudinally extending guiding grooves could be provided, too.) Figures 7 and 8, furthermore, illustrate that the surface 6 of the steps rising in the backward direction terminates in front of the step edge 7 ~
in a plane lying deeper than the plane 5 o~ the running surface of the step-free portion of the ski, i.e. deeper by the height of the ribs 3, so that the ribs 3 do not surmount the plane 5 of the running surface but that their head portions lie in the plane 5 of the running surface.
In the embodiment according to figures 9 and 10, too, a running base 2 of plastics is mounted on the body 1 of the ski, the running surface of the central portion of the ski being provided with stepped ~ -profilings which are superimposed by longitudinally extending ribs 3.
As compared to the afore-mentioned embodiments figures 9 and 10 illustrate that a running groove 8 which extends continuously and substantially over the entire length of the ski and also over the stepped portion. Figures 9 and 10,furthermore, illustrate that the surface 6 of the steps rising _ g _ 6~17 in the backward direction terminates in front of the step edge 7 in a plane lying deeper than the plane 5 of the running surface of the -step-free portions of the ski surface by more than the height of the ribs 3, so that the head portions of the ribs 3 lie below the plane 5 of the running surface.
' = ......... .' In the embodiment according to figures 7 and 8 as well as in the embodiment according to figures 9 and 10 a special form similar to figure 6 --having staggered ribs 3 is possible. The features of figures 7 and 8 resp. figures 8 and 9 with regard to the step height in the step-free portion I in respect of the plane 5 of the running surface I 15 can, for example, also be applied in the ., .
,~ embodiment according to figures 1 through 5.
i .
The illustrated embodiments show "straight" stepped profilings as the terminating lines of the steps resp. step edges 7 take a straight, transversal portion in respect of the longitudinal axis of the ski. This is, no must, however;
the terminating lines of the steps resp. step ~ edges can also be curved.
i: .
1: :
Z~ The illustrated embodiments show stepped profilings ~ 25 of the running surface of the ski. The invention can be , : , .
', ' ' ' ' ' '' ' ' .. . .
.
~1~64~7 equally applied to scaled running bases. Figures 11 and 12 show a portion of a scaled running ~ase with p~sitive scales being superimposed by ribs 3 according to the invention. Figures 13 and 14 show a portion of a scaled running base with `
negative scales also being superimposed by ribs 3 according to the invention. In figures 11 and 13 - -the upward direction is orientated towar~s the ski tip and the downward direction towards the 10 rear and of the ski. According to figures 11 . --through 13 one rib 3 each is disposed on each scale.
It is also possible, however, to dispose two or more ribs extending parallel to one another on each scale.
In the embodiment according to figures 15 through 19 a running base 2, preferably of plastics, e.g. of - polyethylene, is mounted on the lower surface of the body 1 of the ski. The central portion of the running surface of the ski has stepped profilings which are superimposed by longitudinally extending ..
ribs 3 in the portion 6' of the surface~ The running surface of the front and rear portions of the ski has longitudinally extending ribs 4 surmounting the plane 5 of the running surface.
The stepped profilings have a surface portion 6"
rising in the backward direction and changing over 69~
into a plane surface portion 6' said surface portion 6' lying in the extension of the plane 5 of the running surface of the front and rear step-free portions of the ski. The plane portion 6' of the surface is of essential importance to the gliding characteristics of the ski resp~
of the running base. The greater the length a of said planar portion 6', the better the gliding characteristics of the longitudinal profile of the steps. In the embodiment the ration between length a of the planar portion 6' of the step surface and length b of the rising portion 6" is bigger than one (b > 1 ) .
In the embodiment according to figures 15 through 19 the planar surface portions 6' do not surmount the plane 5 of the running surface. The plane 5 of the running surface is, however, surmounted by the ribs 3 superimposed on the steps and by the ribs 4 in the step-free portions.
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The ribs 3 only extend over the planar surface portions 6' of the stepped profilings and terminate in a backward directed face 3' (tGwards the ski end).
The face 3' is advantageously vertically positioned in respect of the plane 5 of the running surface but it can also include a small angle with the vertical - ~2 -11~6417 line of the plane of the running surface. Moreover, the face 3' can be planar or curved, concave in particular. The feature of the backward directed face 3' of the ribs 3 is of paxticular importance to good mounting characteristics of the ski. The front end of the ribs 3 directed towards the ski tip are inclined and gradually and smoothly change over into the surface portion 6" of the steps rising in the backward dlrection. These measures are important with regard to good forward gliding characteristics.
In this embodiment, too, the height c of the ribs 3 is advantageously relatively reduced, i.e. less than the depth d of the steps. The height of the ribs is, for example, 0,1 to 0,3 mm the depth of the steps O,4 to 0,6 mm. The width e of the ribs 3 is smaller than the width f of the gliding portions of the step surface 6' positioned between two ribs (fig. l6).
20- This measure and, furthermore, the feature providing that the height c of the ribs is smaller than (or e~ual to) the depth d of the steps and, moreover, the feature providing that the length a of the planar portion of the step surface 6' is bigger than (or equal to) the length b of the rising portion of the step surface 6" also produce good forward gliding characteristics of the ski.
The ribs 4 in the front and rea~ step-free portion of the ski advantageously have the s~me height and width, the same distances and the same cross-sectional profile as the ribs 3 in the stepped portion. Figure 17 illustrates an advantageous cross-sectional profile of the ribs 3 ~and of the ribs 4). Other cross-sectional profiles of the ribs 3 resp. 4 are also possible.
In the embodiment according to figures 15 through 19 the ribs 3 of two adjacent steps are aligned. Moreover, the ribs 4 ~f the step-free portion of the running surface are aligned with the ribs 3 of the steps.
The ribs 3 of two adjacent steps can also be staggered. Furthermore, it is possible to provide step-free portions of the running surface of the ! ski without ribs 4 and to provide the usual central guiding groove instead. The central guiding groove can also extend over the profiled portio~ of the running surface of the ski.
In the embodiment according to figures 1 through 5 as well as in the embodiment according to figures 15 through 19 the width e of the ribs 3 resp. 4 is smaller than the width f of the gliding portions lying between the ribs. This is no must, however;
on the contrary, the ribs 3 resp. 4 can also be broader than the intermediate portions between the ribs.
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4~7 The running surface according to the invention can be produced by non-cutting (e.g. by stamping by means of stamping rolls) or cut,ing methods.
The running surface according to figures 14 through 19 is particularly suited for a process comprising a first step in which the profilings without ribs are produced by a non-cutting method, e.g. by stamping, and a second step in which several grooves are milled by a cutting method at least into that portion of the running surface of the ski which has profilings, said grooves having a planar bottom surface, being spaced beside one another and extending in the longitudinal direction of the ski, whereby the depth of the grooves is smaller than the depth of the profilings. The planar bottom surfaces of the milled grooves, thus, form the planar surface portions of the profilings and the webs remaining between the grooves form the ribs according to the invention being superimposed on the planar surface portions of the profilings.
. .
The production can, for example, also be carried out by producing the running surface with the longitudinal ribs in a first production step, preferably by a non-cutting method, e~g. by extrusion, without steps, scales or similar profilings, whereupon, in a second step, the portions of the steps, scales or simliar .
~ 15 -. .
-6~17 profilings lying below the pl~ne of the running surface are milled transverse in respect of the longitudinal axis of the ski.
In the illustrated embodiments the steps resp.
the scale rows extend over the whole width of the ski. This is, however, no essential feature of the invention. Bordex or central strips, for example, can remain without stepped or scaled profilings, whereby the surfaces of said strips can, for example, be positioned in the plane 5 of the running surface of the front and rear step-free resp. scale-free portions of the running surface of the ski. The border strips can, e.g. in the case of touring skis, take up steel edges.
t`
.. . . . ..
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Description_of the Prior Art lQ A ski of the above-mentioned kind has, for ex ample, already been described in the Austrain patent No. 330.625. Further suggestions have also been made to provide the running surface of the ski with pro-filings, such as scales or steps, which offer far less resistance against forward gliding than against back-ward sliding (e.g. United States Patent No. 3.408.086, laid open German Specification 1.954.075). ~unning surfaces of this kind are first of all intended for cross-country skis. Scaled or stepped running bases which ~0 haye been known so far either pro-vide satisfactory glid-ing characteristics for the forward gliding bu~ at the same time insufficient resistance against backward sliding (climbing characteristics~ or they provide suffIcient climbing characteristics kut insufficient gliding char-acteristics for foward gliding.
It was the obiect of seyeral known suggestions with regard to stepped or scaled running bases to improve the tracking of the ski by a special arrangement of the profilings of the running surface, i.e. in such a way that the usual central guiding groove can be omitted or be of very shallow cross-section.
A former suggestion (Austrian Patent No.
151.363) pro~ides a stepped running surface and breaking and guiding members on the individual steps, said members haying a skid-shaped edge at their front end and a break-ing tip at their rear end. Such a construction of the 10. running surface should not only prevent backward sliding when climbing upwards but aboye all provide a better guiding of the ski on crus.ty or icy tracks, the skid-shaped edges of the breaking and guiding mem~ers obvious-ly having or complementing the function of gripping means . on crusty tracks.
.
Summary o the I.nyention It is the object of the present invent~on to produce running surfaces for sk~s for cross-country skis in particular, which come close to an ideal relation be-tween satisfactory forward gliding characteristics and sufficient resistance against backward s~.iding on the one : hand and which, on the other hand, makes the guiding of : :
, - .
`: :
~, ~. , , ~ .
. ' .
~1~641~
the ski (tracking) possible without the usual central guiding groove or im-proves the guiding in addition to one (or several longitudinally extending) guiding groove(s).
The invention provides a running surface for skis, at least part of the running surface being provided with two kinds of profilings compris-ing:
a) first profilings, having surfaces with an inclined front portion rising in the backward direction of the ski and a planar rear portion that is parallel to the major plane of the running surface, and b) second profilings in the form of ribs extending in the longi-tudinal direction of the ski, said ribs surmounting at lcast said planar rear portion of the surface of said first profilings by a substantia~ly constant height (c) with respect to the surface of said first profilings, and said ribs terminating above said planar rear porticn of the surface of said first profilings in a rearwardly directed face.
According to another aspect of the invention, there is provided a method for producing a r~mning surface of skis, the latter having at least one part of a running surface provided with two kinds of prcfilings, com-prising the steps of: providing a plurality of longitudinally extending ribs in said running surface without cutting of said surface; and cutting the running surface transversely to produce a plurality of first profilings in the area of said longitudinally extending ribs each having a forward inclined portion and a rear planar portion.
The ribs according to the invention superi~posed on the profilings, i.e. s~ales, steps or the like, do not only influence the longitudinal guiding, i.e. the tracking of the ski, but their faces being turned into the backward direction also increase the resistance of the ski against backward sliding, also in the case of hard snow or icy tracks, without im-pairing the forward gliding characteristics to the same extent. Due to the invention the scales, steps or the like can either have a longitudinal 641~
profiling that is better suited for gliding than conventional mounting o gliding bases, thereby obtaining improved gliding characteristics for gliding forwards, the mounting characteristics remaining at least the same. It is, furthermore, possible to use a conventional arrangement of profilings pro- -viding good gliding characteristics and to improve the mounting character-istics by means of the invention. Moreover, the ribs according to the invention provide a good longitudinal guiding of the ski.
Brief Description of the Drawings _ _ .
In the following, embodiments of the invention will be described in more detail by means of the drawings without being limited thereto.
Figure 1 shows a top view of the running surface of the ski;
Figure 2 shows an enlarged view according to A of figure l;
Figure 3 shows a cross-section according to III-III of figure 2; -Figure 4 shows a longitudinal section according to IV-IV of `-figure 2;
Figure 5 shows a further enlarged section according to B of figure 4;
Figure 6 shows a section of the running surface of the ski being a different embodiment of figure 2;
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' ~ ~ :
~ -4-:
C
ti 4 17 Fig. 7 shows a top view of the running surface of the ski;
Fig. 8 ~hows an enlarged longitudinal section according to VIII VIII of fisure 7;
Fig. 9 shows a top view of the running surface of :~
the ski;
Fig. 10 shows an enlarged longitudinal section -~-according to X-X of figure 8;
Fig. 11 shows a top view of a portion of a running -surface of a running base;
Fig. 12 shows a longitudinal section of the running base according to XII-XII of figure 11;
Fig. 13 shows a top view of a portion of the running surface of a running base of a ski;
Fig. 14 shows a longitudinal section of the running base according to XIV-XIV of figure 13;
Fig. 15 shows a further-top view of the running surface of a ski;
Fig. 16 shows an enlarged portion according to C of figure 15;
Fig. 17 shows a cross-section according to XVII-XVII
of ~igure ~6; ~
Fig. 18 shows a longitudinal section according to XVIII-XVIII of figure 16; and Fig. 19 shows a further enlarged portion according to D of f igure 16.
Description of the Preferred_Embodiments In the embodiment according to figures 1 through 5 a running base 2 which is advantageously of plastics, polyethylene for example, is mounted in the lower part of the body 1 ~f the ski.
The running surface in the central portion of the ski is provided with stepped profilings which are superimposed by longitudinally extending ribs 3. The running surface of the front and rear portion of the ski has longitudinally extending ribs 4 which surmount the plane 5 of the running surface.
The stepped profilings have a surface 6 rising in the backward direction and having a planar portion in front of the step edge 7, said portion being positioned in the extension of the plane 5 of the running surface of the front and rear step-free portion of the ski~ The planar portion of the surface 6 is of great importance to good gliding characteristics of the ski resp. of its running base. The greater the length a of said planar portion, the~better the gliding characte~istics :
of the longitudinal profile of the steps. In the embodiment the ratio between length a of the planar portion of the surface 6 of the step and length b of the rising portion is, therefore, bigger than one ( b ~ 1 ) .
.
~ - 6 -In the embodiment according to figures 1 through 5 the portions of the surfaces 6 do not surmount the plane 5 of the running surface. The plane 5 -of the running surface is, however, partially ~
near step edge 7 - surmounted by the ribs 3 superimposed on the steps and by the ribs 4 in the step-free portions. . . .-The ribs 3 extend from the lowest portion of a step --~ at a constant height over the surface 6 preferably -.... -o onto the step edge 7. The height c of ribs 3 is advantageousl:y relatively reduced, i.e. less than the depth d of the steps. The height o:the ribs - ~ ~~ is, for-éxample, 0,1 to 0,3 mm, the depth of the . .-steps 0,4 to 0,6 mm. The width e of the ribs 3 .~ 15 is smaller than the width f of the gliding portions of the surface 6 positioned between two ribs (fig. 2). --This measure and, furthermore, the feature providing s-that the height c of the ribs is smaller than (or e~ual to) the depth d of the steps, and, moreover, the feature providing that the length a of the planar portion of the surface 6 is bigger than (or equal to) the length b of the rising portion of the surface 6 attribute to an ideal realization of the object of ; 25 the invention, particularly with regard to good forward gliding characteristics of the ski.
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~ 6 ~ ~ 7 The ribs 4 in the front and rear step-free portion of the ski advantageously have the same height and width~ the same distances and the same cross-sectional profile as the ribs 3 in the stepped --~ortion. Figure 3 illustrates an advantageous cross-sectional profile of the ribs 3 (and of the ribs 4). Other cross-sectional profiles of the ribs 3 resp. 4 are also possible.
.
In the embodiment according to figures 1 through 5 the ribs 3 of two adjacent steps are aligned.
Moreover, the ribs 4 of the step-free portions of the running surface are aligned with the ribs 3 of the steps. As can be seen in figure 6, the ribs 3 of two adjacent steps can also be staggered. The ribs 3 of the first step are, moreover, staggered . , .
, in respect of the ribs 4 of the step-free portion of the running surface.
... . . ...
In the embodiment according to figures 7 and 8, too, a running base 2 of plastics is mounted on the body 1 2Q ~ of the ski, the running surface of the central portion , of the ski being provided with stepped profilings which are superimposed by longitudinally extending ribs 3.
As compared to the embodIments according to figures 1 through 5, figures 7 and 8 illustrate that the , ... . . . . . .. . . . . . .. . .
5tep-free portions of the running surface have the usual central guiding groove 8. (Several longitudinally extending guiding grooves could be provided, too.) Figures 7 and 8, furthermore, illustrate that the surface 6 of the steps rising in the backward direction terminates in front of the step edge 7 ~
in a plane lying deeper than the plane 5 o~ the running surface of the step-free portion of the ski, i.e. deeper by the height of the ribs 3, so that the ribs 3 do not surmount the plane 5 of the running surface but that their head portions lie in the plane 5 of the running surface.
In the embodiment according to figures 9 and 10, too, a running base 2 of plastics is mounted on the body 1 of the ski, the running surface of the central portion of the ski being provided with stepped ~ -profilings which are superimposed by longitudinally extending ribs 3.
As compared to the afore-mentioned embodiments figures 9 and 10 illustrate that a running groove 8 which extends continuously and substantially over the entire length of the ski and also over the stepped portion. Figures 9 and 10,furthermore, illustrate that the surface 6 of the steps rising _ g _ 6~17 in the backward direction terminates in front of the step edge 7 in a plane lying deeper than the plane 5 of the running surface of the -step-free portions of the ski surface by more than the height of the ribs 3, so that the head portions of the ribs 3 lie below the plane 5 of the running surface.
' = ......... .' In the embodiment according to figures 7 and 8 as well as in the embodiment according to figures 9 and 10 a special form similar to figure 6 --having staggered ribs 3 is possible. The features of figures 7 and 8 resp. figures 8 and 9 with regard to the step height in the step-free portion I in respect of the plane 5 of the running surface I 15 can, for example, also be applied in the ., .
,~ embodiment according to figures 1 through 5.
i .
The illustrated embodiments show "straight" stepped profilings as the terminating lines of the steps resp. step edges 7 take a straight, transversal portion in respect of the longitudinal axis of the ski. This is, no must, however;
the terminating lines of the steps resp. step ~ edges can also be curved.
i: .
1: :
Z~ The illustrated embodiments show stepped profilings ~ 25 of the running surface of the ski. The invention can be , : , .
', ' ' ' ' ' '' ' ' .. . .
.
~1~64~7 equally applied to scaled running bases. Figures 11 and 12 show a portion of a scaled running ~ase with p~sitive scales being superimposed by ribs 3 according to the invention. Figures 13 and 14 show a portion of a scaled running base with `
negative scales also being superimposed by ribs 3 according to the invention. In figures 11 and 13 - -the upward direction is orientated towar~s the ski tip and the downward direction towards the 10 rear and of the ski. According to figures 11 . --through 13 one rib 3 each is disposed on each scale.
It is also possible, however, to dispose two or more ribs extending parallel to one another on each scale.
In the embodiment according to figures 15 through 19 a running base 2, preferably of plastics, e.g. of - polyethylene, is mounted on the lower surface of the body 1 of the ski. The central portion of the running surface of the ski has stepped profilings which are superimposed by longitudinally extending ..
ribs 3 in the portion 6' of the surface~ The running surface of the front and rear portions of the ski has longitudinally extending ribs 4 surmounting the plane 5 of the running surface.
The stepped profilings have a surface portion 6"
rising in the backward direction and changing over 69~
into a plane surface portion 6' said surface portion 6' lying in the extension of the plane 5 of the running surface of the front and rear step-free portions of the ski. The plane portion 6' of the surface is of essential importance to the gliding characteristics of the ski resp~
of the running base. The greater the length a of said planar portion 6', the better the gliding characteristics of the longitudinal profile of the steps. In the embodiment the ration between length a of the planar portion 6' of the step surface and length b of the rising portion 6" is bigger than one (b > 1 ) .
In the embodiment according to figures 15 through 19 the planar surface portions 6' do not surmount the plane 5 of the running surface. The plane 5 of the running surface is, however, surmounted by the ribs 3 superimposed on the steps and by the ribs 4 in the step-free portions.
- .
The ribs 3 only extend over the planar surface portions 6' of the stepped profilings and terminate in a backward directed face 3' (tGwards the ski end).
The face 3' is advantageously vertically positioned in respect of the plane 5 of the running surface but it can also include a small angle with the vertical - ~2 -11~6417 line of the plane of the running surface. Moreover, the face 3' can be planar or curved, concave in particular. The feature of the backward directed face 3' of the ribs 3 is of paxticular importance to good mounting characteristics of the ski. The front end of the ribs 3 directed towards the ski tip are inclined and gradually and smoothly change over into the surface portion 6" of the steps rising in the backward dlrection. These measures are important with regard to good forward gliding characteristics.
In this embodiment, too, the height c of the ribs 3 is advantageously relatively reduced, i.e. less than the depth d of the steps. The height of the ribs is, for example, 0,1 to 0,3 mm the depth of the steps O,4 to 0,6 mm. The width e of the ribs 3 is smaller than the width f of the gliding portions of the step surface 6' positioned between two ribs (fig. l6).
20- This measure and, furthermore, the feature providing that the height c of the ribs is smaller than (or e~ual to) the depth d of the steps and, moreover, the feature providing that the length a of the planar portion of the step surface 6' is bigger than (or equal to) the length b of the rising portion of the step surface 6" also produce good forward gliding characteristics of the ski.
The ribs 4 in the front and rea~ step-free portion of the ski advantageously have the s~me height and width, the same distances and the same cross-sectional profile as the ribs 3 in the stepped portion. Figure 17 illustrates an advantageous cross-sectional profile of the ribs 3 ~and of the ribs 4). Other cross-sectional profiles of the ribs 3 resp. 4 are also possible.
In the embodiment according to figures 15 through 19 the ribs 3 of two adjacent steps are aligned. Moreover, the ribs 4 ~f the step-free portion of the running surface are aligned with the ribs 3 of the steps.
The ribs 3 of two adjacent steps can also be staggered. Furthermore, it is possible to provide step-free portions of the running surface of the ! ski without ribs 4 and to provide the usual central guiding groove instead. The central guiding groove can also extend over the profiled portio~ of the running surface of the ski.
In the embodiment according to figures 1 through 5 as well as in the embodiment according to figures 15 through 19 the width e of the ribs 3 resp. 4 is smaller than the width f of the gliding portions lying between the ribs. This is no must, however;
on the contrary, the ribs 3 resp. 4 can also be broader than the intermediate portions between the ribs.
. .
4~7 The running surface according to the invention can be produced by non-cutting (e.g. by stamping by means of stamping rolls) or cut,ing methods.
The running surface according to figures 14 through 19 is particularly suited for a process comprising a first step in which the profilings without ribs are produced by a non-cutting method, e.g. by stamping, and a second step in which several grooves are milled by a cutting method at least into that portion of the running surface of the ski which has profilings, said grooves having a planar bottom surface, being spaced beside one another and extending in the longitudinal direction of the ski, whereby the depth of the grooves is smaller than the depth of the profilings. The planar bottom surfaces of the milled grooves, thus, form the planar surface portions of the profilings and the webs remaining between the grooves form the ribs according to the invention being superimposed on the planar surface portions of the profilings.
. .
The production can, for example, also be carried out by producing the running surface with the longitudinal ribs in a first production step, preferably by a non-cutting method, e~g. by extrusion, without steps, scales or similar profilings, whereupon, in a second step, the portions of the steps, scales or simliar .
~ 15 -. .
-6~17 profilings lying below the pl~ne of the running surface are milled transverse in respect of the longitudinal axis of the ski.
In the illustrated embodiments the steps resp.
the scale rows extend over the whole width of the ski. This is, however, no essential feature of the invention. Bordex or central strips, for example, can remain without stepped or scaled profilings, whereby the surfaces of said strips can, for example, be positioned in the plane 5 of the running surface of the front and rear step-free resp. scale-free portions of the running surface of the ski. The border strips can, e.g. in the case of touring skis, take up steel edges.
t`
.. . . . ..
.
Claims (19)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A running surface for skis, at least part of the running surface being provided with two kinds of profilings comprising:
a) first profilings, having surfaces with an inclined front portion rising in the backward direction of the ski and a planar rear portion that is parallel to the major plane of the running surface, and b) second profilings in the form of ribs extending in the longitudinal direction of the ski, said ribs surmounting at least said planar rear portion of the surface of said first pro-filings by a substantially constant height (c) with respect to the surface of said first profilings, and said ribs terminating above said planar rear portion of the surface of said first pro-filings in a rearwardly directed face.
a) first profilings, having surfaces with an inclined front portion rising in the backward direction of the ski and a planar rear portion that is parallel to the major plane of the running surface, and b) second profilings in the form of ribs extending in the longitudinal direction of the ski, said ribs surmounting at least said planar rear portion of the surface of said first pro-filings by a substantially constant height (c) with respect to the surface of said first profilings, and said ribs terminating above said planar rear portion of the surface of said first pro-filings in a rearwardly directed face.
2. A running surface according to claim 1, wherein said height (c) of said ribs is equal to or smaller than a maximum depth (d) of said first profilings.
3. A running surface according to claim 1, wherein said height (c) of said ribs is 0.1 to 0.3 mm.
4. A running surface according to claim 1, wherein a width (e) of said ribs is smaller than a width (f) of portions of said surface of said first profilings lying between said ribs.
5. A running surface according to claim 1, wherein said ribs have a rounded cross-sectional profile.
6. A running surface according to claim 1, wherein said first profilings are arranged in rows transversely across the ski, with said ribs of said rows being staggered in the longitudinal direction.
7. A running surface according to claim 1, wherein said first profilings are arranged in rows transversely across the ski, with said ribs of said rows being aligned in the longitudinal direction.
8. A running surface according to claim 1, further including an additional part of the running surface lying adjacent to the part of the running surface including said first profilings, and longitudinally extending ribs surmounting the plane of said additional part of the running surface.
9. A running surface according to claim 8, wherein said ribs of said addition part of the running surface are aligned with said ribs of said part including said first profilings.
10. A running surface according to claim 1, wherein a length (a) of said planar rear portion of said first profilings is bigger than a length (b) of said inclined front portion.
11. A running surface according to claim 8, wherein said ribs of said addition part of the running surface surmount said major plane of the running surface by a height (c).
12. A running surface according to claim 8, wherein said ribs of said part including said first profilings do not extend to said additional part.
13. A running surface according to claim l, wherein said ribs extend to said inclined front portion of said first profiling.
14. A running surface according to claim l, wherein said ribs extending in the longitudinal direction of the ski are only disposed on said planar rear portion of said first profilings, said ribs terminating in a backwardly directed face.
15. A running surface according to claim 14, wherein said ribs surmount said planar rear portion of said first profilings over the larger part of the longitudinal extension of said rear portion, by a constant height.
16. A running surface according to claim 14, wherein a front end of said ribs, directed toward the ski tip, is inclined.
17. A running surface according to claim 16, wherein said front end of said ribs directed toward the ski tip, gradually and smoothly inclines forwardly into said inclined front portion of said first profilings and rises in the backward direction.
18. A method for producing a running surface of skis, the latter having at least one part of a running surface provided with two kinds of profilings, the method comprising the steps of:
impressing the running surface in a first production step to form first profilings without cutting, said first profilings including inclined front portions rising in a backward direction along the running surface and planar rear portions substantially parallel to a major plane of the running surface; and cutting a plurality of grooves into the at least one part of the running surface provided with the two kinds of profilings, the grooves being spaced from each other and extending in a longitudinal direction of the running surface with each groove having a planar bottom surface and a depth smaller than the depth of the first profilings, the plurality of spaced grooves defining a plurality of longitudinally extending ribs therebetween which are disposed on said planar portions of said first profilings.
impressing the running surface in a first production step to form first profilings without cutting, said first profilings including inclined front portions rising in a backward direction along the running surface and planar rear portions substantially parallel to a major plane of the running surface; and cutting a plurality of grooves into the at least one part of the running surface provided with the two kinds of profilings, the grooves being spaced from each other and extending in a longitudinal direction of the running surface with each groove having a planar bottom surface and a depth smaller than the depth of the first profilings, the plurality of spaced grooves defining a plurality of longitudinally extending ribs therebetween which are disposed on said planar portions of said first profilings.
19. A method for producing a running surface of skis, the latter having at least one part of a running surface provided with two kinds of profilings, comprising the steps of: providing a plurality of longitudinally extending ribs in said running surface without cutting of said surface; and cutting the running surface transversely to produce a plurality of first profilings in the area of said longitudinally extending ribs each having a forward inclined portion and a rear planar portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1648/77 | 1977-03-11 | ||
| AT164877A AT347832B (en) | 1977-03-11 | 1977-03-11 | RUNNING AREA OF SKIS AND SKI LAYERS |
| ATA1193/78 | 1978-02-20 | ||
| AT119378A AT357447B (en) | 1978-02-20 | 1978-02-20 | RUNNING AREA OF SKIERS OR SKI COVERINGS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1106417A true CA1106417A (en) | 1981-08-04 |
Family
ID=25595148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA298,646A Expired CA1106417A (en) | 1977-03-11 | 1978-03-10 | Running surface for skis resp. for running bases and method for producing said running surface |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS53113636A (en) |
| CA (1) | CA1106417A (en) |
| CH (1) | CH627656A5 (en) |
| DE (1) | DE2810242A1 (en) |
| FI (1) | FI780774A (en) |
| FR (1) | FR2382909A1 (en) |
| IT (1) | IT1093226B (en) |
| NO (1) | NO144319C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223909A (en) * | 1979-03-01 | 1980-09-23 | Trak Incorporated | Ski with improved three-dimensional running surface |
| AT368012B (en) * | 1980-10-02 | 1982-08-25 | Staufer Adolf Dipl Ing | OUTSOLE COVER FOR SKI AND METHOD FOR THE PRODUCTION THEREOF |
-
1978
- 1978-03-09 DE DE19782810242 patent/DE2810242A1/en not_active Withdrawn
- 1978-03-09 CH CH260678A patent/CH627656A5/en not_active IP Right Cessation
- 1978-03-10 FR FR7806975A patent/FR2382909A1/en active Granted
- 1978-03-10 IT IT21115/78A patent/IT1093226B/en active
- 1978-03-10 FI FI780774A patent/FI780774A/en not_active Application Discontinuation
- 1978-03-10 CA CA298,646A patent/CA1106417A/en not_active Expired
- 1978-03-10 NO NO780851A patent/NO144319C/en unknown
- 1978-03-10 JP JP2675678A patent/JPS53113636A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FI780774A (en) | 1978-09-12 |
| FR2382909B3 (en) | 1980-11-07 |
| NO780851L (en) | 1978-09-12 |
| JPS53113636A (en) | 1978-10-04 |
| CH627656A5 (en) | 1982-01-29 |
| FR2382909A1 (en) | 1978-10-06 |
| IT7821115A0 (en) | 1978-03-10 |
| IT1093226B (en) | 1985-07-19 |
| DE2810242A1 (en) | 1978-09-14 |
| NO144319C (en) | 1981-08-12 |
| NO144319B (en) | 1981-05-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |