CA1102842A - Ice skate blade with passageway and longitudinal anchors - Google Patents
Ice skate blade with passageway and longitudinal anchorsInfo
- Publication number
- CA1102842A CA1102842A CA306,745A CA306745A CA1102842A CA 1102842 A CA1102842 A CA 1102842A CA 306745 A CA306745 A CA 306745A CA 1102842 A CA1102842 A CA 1102842A
- Authority
- CA
- Canada
- Prior art keywords
- blade
- edge
- projection
- aperture
- extremity
- 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
- A63C1/00—Skates
- A63C1/30—Skates with special blades
- A63C1/32—Special constructions of the simple blade
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Abstract of the Disclosure A blade for ice skating having a transverse,longitudinally extend-ing passageway, desirably centrally located, and at least one longitudinally extending structural configuration for securely and partially embedding the blade in a supporting body that is in turn affixed to a shoe. The longitudin-ally extending passageway and member avoid the structural weaknesses of the prior art and permit the rigid and partial embedding of the blade in the supporting body.
Description
1 ~ 2~ Z
The present invention relates to a blade for ice skates, and, more particularly, to a blade which can be partially embedded in a supporting body of plastic material that is, in turn, affixed to a shoe for skating.
In the use of ice skates, each blade and its support are constant-ly subjected to pressures that depend in severity upon the particular activity for which the skates are used. The pressures are particularly severe, for example, when the skates are used for ice hockey.
The resulting pressure,have an adverse effect on the supporting body of each skate, particularly in the connection of the support body and the blade. To realize a suitable blade-support combination, it is necessary to select an appropriate plastic material for the support, and, in particular, an appropriate anchorage of the blade to the support.
In one prior art technique for attempting to realize an anchorage that can withstand rough treatment, a support body had been molded directly over the blade, with a plurality of transverse links between the blade and the support. For that purpose, the blade is provided, along a side that is embedded in the support, with a number of transverse holes of various forms and more or less regular distribution. The dimensions of the holes are chosen to facilitate the flow of fluid or semi-fluid plastic material that forms the desired links when the plastic becomes cold.
In another prior art technique for attempting to achieve a suit-able anchorage, the upper edge of the blade that is embedded in the support is provided with a plurality of protuberances, each essentially in the form of a "T" with wings parallel to the edge to form passages. These serve to provide transverse links that correspond to those provided by the holes men-tioned above. This last technique, using "T" wings provides better anchorage between the blade and the support body than does the use of apertures alone.
Both techniques, however, present a technical difficulty not heretofore overcome. Considering the high temperatures used during the mold-ing of the support, the shrinkage of the selected plastic material during ~2~42 cooling, and the presence of transverse links realized in corresponding positions at opposite extremities of the blade, internal stresses are produced which are localized near the blade or passages of the blade. As a consequence during use of skates that are produced in a conventional way relatively minor pressures can cause the formation of cracks that can rapidly lead to a fracture.
The invention provides an ice skating blade that is anchored to a support in a way that overcomes the difficulties mentioned above.
In accordance with the invention, an ice skating blade is provided with an upper edge to be embedded in a supporting body of plastic material by which the blade is affixed to a shoe for skating, comprising a centrally located transverse aperture near said edge and a first projection above said edge and spaced from said aperture, this first projection being provided with a respective appendix formed at an extremity of the blade and extending towards said aperture, parallel to and spaced from said edge.
According to one realization of the invention, the transverse aperture is in a central portion of the blade near its upper edge. The coupling instrumentality can take the form of a projection at an extremity of the blade, or two projections at opposite extremities of the blade. In the latter case, the projections are turned towards the transverse aperture in parallel alignment with the upper edge of the blade. The coupling instrumentality may also take the form of one or more longitudinally extending grooves positioned near the upper, embeddable edge of the blade.
The transverse aperture can be in the body of the blade or in a projection of the blade above its upper edge. The projection containing the aperture can be at an extremity or an intermediate position.
The principal advantage of the invention is that the anchorage of the blade to the supporting body is insured with transversal tightness between the blade and the body. During the cooling of the plastic material chosen for the supporting body, the material shrinks in a longitudinal direction with respect to the blade in such a way that there is an apparent ~ 2 -k~
~Z84Z
absence of any zones of undesired stress.
Other characteristics of the invention will become apparent from a description of several realizations of a blade for ice skates with reference to, but not limited to, embodiments described below:
Figure 1 represents a side view of a first realization of a blade for ice skates according to the invention;
Figure 2 represents the blade of Figure 1 anchored to a support body shown in phantom;
Figures 3 and 4 represent two alternative variations of the blade of Figure l; and Figure 5 is a sectional view of the blade of Figure 4 taken along the line V-V.
With reference to Figures 1 and 2, an ice skating blade 1 accord-ing to the invention is shown with an edge 2 and associated structure to be embedded in a support 3 (in phantom) realized using an appropriate plastic material.
Along the edge 2 the blade 1 has three projection portions 4, 5 and 6 of which the intermediate portion 5 has a transverse passage or hole 7 of prescribed form. The particular passage 7 is oblong with major axis extending longitudinally in alignment with the edge 2. The remaining projec-tions 4 and 6 are formed at counterpart extremities of the blade and define respective appendages 4a and 6a. The appendages extend toward the inter-mediate projection 5 in parallel alignment with associated portions of the edge 2 of the blade 1.
The appendages 4a and 6a have a prescribed length in accordance with the coefficient of shrinkage of the plastic material chosen for realiza-tion of the supporting base 3. The appendages are separated from edge 2 of the blade 1 to form respective oblong passages 8 and 9 of prescribed width.
As illustrated in Figure 1 the passages 8 and 9 desirably have substantially the same width and length as the transverse passage 7. The illustrated length 4~
of each passage is about eight per cent of the overall length of the blade 1.
The blade 1 described above is rigidly fixed in the supporting body 3 by molding. During the molding operation, which is completely conven-tional, plastic material in fluid form engulfs the projections 4 and 6 with their respective appendages 4a and 6a, the intermediate projection 5 and parts of the blade in proximity to the edge 2. This completely fills the hole 7 of the intermediate portion 5 and the passages 8 and 9 of the appendages 4 and 6. As indicated in Figure 2, the overlap of the plastic material from the edge 2 along the lateral faces of the blade 1 is advantageously approximately the same as the widths of the passages 7, 8, and 9.
During the subsequent cooling of the molded plastic material and its consolidation into the support 3, there is an attendant shrinkage of the plastic. Because of the oblong form of the support body 3, the fixed trans-verse and oblong passages formed between the support and the blade 1 and the partially embedding of the blade in the body in correspondence with the hole 7 of the intermediate projection 5, the blade resists the phenomenon of shrinkage corresponding to the movement of the material from the extremity of the support body 3 towards its central portion. This movement is nGt ab-solutely stopped by the configuration of the blade but is guided, particularly for the plastic material contained between the appendages 4a and 6a and the edge 2 of the blade, so that internal localized stresses are avoided in the support body 3.
In other words, an anchorage with the desired resistance character-istic is insured by the complete embedding of the appendages 4a and 6a of the projections 4 and 6 and the intermediate projection 5, along with the realization of transverse links by the solidification of plastic material in the passage 7 of the projection 5.
The length of each of the appendages 4a and 6a associated with the projections 4 and 6 is chosen so that when there is consolidation of the sup-porting body, notwithstanding the effects of shrinkage of the plastic material in the directions indicated by the arrows, leaving voids in the passages 8 and 9 as shown in Figure 2, the appendages are nevertheless totally embedded in the body 3.
In Figure 3 there is illustrated a variant ice skating blade of the invention. With reference to that figure, a blade 11 intended to be partially embedded in the body (not shown) of plastic material is equipped along an edge 12 with projection portions 13 and 14 at corresponding opposite extremities. The portion 13 is pierced by a hole 15, preferably oblong, while the projection 14 forms an appendage 14a turned towards the portion 13 exten-ding parallel to and in alignment with the edge 13 of the blade. Between the appendage 14 and the edge 12 there is formed a passage 16 of prescribed length and width, which is advan~ageously similar to that of the passage 15.
With reference to Figures 4 and 5 there is illustrated an alter-native form of the invention. The blade 17 is provided with a hole 18 in its central portion. On opposite sides 17a and 17b of the blade 17, as further indicated in the cross-sectional view of Figure 5, there is an anchorage in the form of corresponding grooves 19 and 20 which extend parallel to the upper edge 17c of the blade in prescribed relation and distance with respect to it. The grooves 19 and 20, for example produced by milling, are dimension-ed for hooking together the plastic material of the support body (not shown) during molding directly with the blade 17. They confine the shrinkage to movement in the desired longitudinal direction.
While various aspects of the invention have been set forth by the drawings and specification, it is to be understood that the foregoing detailed description is for illustration only and that various changes in parts, as well as the substitution of equivalent constituents for those shown and des-cribed may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
The present invention relates to a blade for ice skates, and, more particularly, to a blade which can be partially embedded in a supporting body of plastic material that is, in turn, affixed to a shoe for skating.
In the use of ice skates, each blade and its support are constant-ly subjected to pressures that depend in severity upon the particular activity for which the skates are used. The pressures are particularly severe, for example, when the skates are used for ice hockey.
The resulting pressure,have an adverse effect on the supporting body of each skate, particularly in the connection of the support body and the blade. To realize a suitable blade-support combination, it is necessary to select an appropriate plastic material for the support, and, in particular, an appropriate anchorage of the blade to the support.
In one prior art technique for attempting to realize an anchorage that can withstand rough treatment, a support body had been molded directly over the blade, with a plurality of transverse links between the blade and the support. For that purpose, the blade is provided, along a side that is embedded in the support, with a number of transverse holes of various forms and more or less regular distribution. The dimensions of the holes are chosen to facilitate the flow of fluid or semi-fluid plastic material that forms the desired links when the plastic becomes cold.
In another prior art technique for attempting to achieve a suit-able anchorage, the upper edge of the blade that is embedded in the support is provided with a plurality of protuberances, each essentially in the form of a "T" with wings parallel to the edge to form passages. These serve to provide transverse links that correspond to those provided by the holes men-tioned above. This last technique, using "T" wings provides better anchorage between the blade and the support body than does the use of apertures alone.
Both techniques, however, present a technical difficulty not heretofore overcome. Considering the high temperatures used during the mold-ing of the support, the shrinkage of the selected plastic material during ~2~42 cooling, and the presence of transverse links realized in corresponding positions at opposite extremities of the blade, internal stresses are produced which are localized near the blade or passages of the blade. As a consequence during use of skates that are produced in a conventional way relatively minor pressures can cause the formation of cracks that can rapidly lead to a fracture.
The invention provides an ice skating blade that is anchored to a support in a way that overcomes the difficulties mentioned above.
In accordance with the invention, an ice skating blade is provided with an upper edge to be embedded in a supporting body of plastic material by which the blade is affixed to a shoe for skating, comprising a centrally located transverse aperture near said edge and a first projection above said edge and spaced from said aperture, this first projection being provided with a respective appendix formed at an extremity of the blade and extending towards said aperture, parallel to and spaced from said edge.
According to one realization of the invention, the transverse aperture is in a central portion of the blade near its upper edge. The coupling instrumentality can take the form of a projection at an extremity of the blade, or two projections at opposite extremities of the blade. In the latter case, the projections are turned towards the transverse aperture in parallel alignment with the upper edge of the blade. The coupling instrumentality may also take the form of one or more longitudinally extending grooves positioned near the upper, embeddable edge of the blade.
The transverse aperture can be in the body of the blade or in a projection of the blade above its upper edge. The projection containing the aperture can be at an extremity or an intermediate position.
The principal advantage of the invention is that the anchorage of the blade to the supporting body is insured with transversal tightness between the blade and the body. During the cooling of the plastic material chosen for the supporting body, the material shrinks in a longitudinal direction with respect to the blade in such a way that there is an apparent ~ 2 -k~
~Z84Z
absence of any zones of undesired stress.
Other characteristics of the invention will become apparent from a description of several realizations of a blade for ice skates with reference to, but not limited to, embodiments described below:
Figure 1 represents a side view of a first realization of a blade for ice skates according to the invention;
Figure 2 represents the blade of Figure 1 anchored to a support body shown in phantom;
Figures 3 and 4 represent two alternative variations of the blade of Figure l; and Figure 5 is a sectional view of the blade of Figure 4 taken along the line V-V.
With reference to Figures 1 and 2, an ice skating blade 1 accord-ing to the invention is shown with an edge 2 and associated structure to be embedded in a support 3 (in phantom) realized using an appropriate plastic material.
Along the edge 2 the blade 1 has three projection portions 4, 5 and 6 of which the intermediate portion 5 has a transverse passage or hole 7 of prescribed form. The particular passage 7 is oblong with major axis extending longitudinally in alignment with the edge 2. The remaining projec-tions 4 and 6 are formed at counterpart extremities of the blade and define respective appendages 4a and 6a. The appendages extend toward the inter-mediate projection 5 in parallel alignment with associated portions of the edge 2 of the blade 1.
The appendages 4a and 6a have a prescribed length in accordance with the coefficient of shrinkage of the plastic material chosen for realiza-tion of the supporting base 3. The appendages are separated from edge 2 of the blade 1 to form respective oblong passages 8 and 9 of prescribed width.
As illustrated in Figure 1 the passages 8 and 9 desirably have substantially the same width and length as the transverse passage 7. The illustrated length 4~
of each passage is about eight per cent of the overall length of the blade 1.
The blade 1 described above is rigidly fixed in the supporting body 3 by molding. During the molding operation, which is completely conven-tional, plastic material in fluid form engulfs the projections 4 and 6 with their respective appendages 4a and 6a, the intermediate projection 5 and parts of the blade in proximity to the edge 2. This completely fills the hole 7 of the intermediate portion 5 and the passages 8 and 9 of the appendages 4 and 6. As indicated in Figure 2, the overlap of the plastic material from the edge 2 along the lateral faces of the blade 1 is advantageously approximately the same as the widths of the passages 7, 8, and 9.
During the subsequent cooling of the molded plastic material and its consolidation into the support 3, there is an attendant shrinkage of the plastic. Because of the oblong form of the support body 3, the fixed trans-verse and oblong passages formed between the support and the blade 1 and the partially embedding of the blade in the body in correspondence with the hole 7 of the intermediate projection 5, the blade resists the phenomenon of shrinkage corresponding to the movement of the material from the extremity of the support body 3 towards its central portion. This movement is nGt ab-solutely stopped by the configuration of the blade but is guided, particularly for the plastic material contained between the appendages 4a and 6a and the edge 2 of the blade, so that internal localized stresses are avoided in the support body 3.
In other words, an anchorage with the desired resistance character-istic is insured by the complete embedding of the appendages 4a and 6a of the projections 4 and 6 and the intermediate projection 5, along with the realization of transverse links by the solidification of plastic material in the passage 7 of the projection 5.
The length of each of the appendages 4a and 6a associated with the projections 4 and 6 is chosen so that when there is consolidation of the sup-porting body, notwithstanding the effects of shrinkage of the plastic material in the directions indicated by the arrows, leaving voids in the passages 8 and 9 as shown in Figure 2, the appendages are nevertheless totally embedded in the body 3.
In Figure 3 there is illustrated a variant ice skating blade of the invention. With reference to that figure, a blade 11 intended to be partially embedded in the body (not shown) of plastic material is equipped along an edge 12 with projection portions 13 and 14 at corresponding opposite extremities. The portion 13 is pierced by a hole 15, preferably oblong, while the projection 14 forms an appendage 14a turned towards the portion 13 exten-ding parallel to and in alignment with the edge 13 of the blade. Between the appendage 14 and the edge 12 there is formed a passage 16 of prescribed length and width, which is advan~ageously similar to that of the passage 15.
With reference to Figures 4 and 5 there is illustrated an alter-native form of the invention. The blade 17 is provided with a hole 18 in its central portion. On opposite sides 17a and 17b of the blade 17, as further indicated in the cross-sectional view of Figure 5, there is an anchorage in the form of corresponding grooves 19 and 20 which extend parallel to the upper edge 17c of the blade in prescribed relation and distance with respect to it. The grooves 19 and 20, for example produced by milling, are dimension-ed for hooking together the plastic material of the support body (not shown) during molding directly with the blade 17. They confine the shrinkage to movement in the desired longitudinal direction.
While various aspects of the invention have been set forth by the drawings and specification, it is to be understood that the foregoing detailed description is for illustration only and that various changes in parts, as well as the substitution of equivalent constituents for those shown and des-cribed may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An ice skating blade provided with an upper edge to be embedded in a supporting body of plastic material by which the blade is affixed to a shoe for skating, comprising a centrally located transverse aperture near said edge and a first projection above said edge and spaced from said aperture, this first projection being provided with a respective appendix formed at an extremity of the blade and extending towards said aperture, parallel to and spaced from said edge.
2. A blade according to Claim 1, wherein said aperture is formed in a central projection above said edge and said first projection provided with a respective appendix is formed at an extremity of the blade.
3. A blade according to Claim 2, wherein a further projection is formed at the other extremity of the blade, this further projection being provided with a respective appendix extending towards the aperture, parallel to and spaced from said edge.
4. A blade according to Claim 1, wherein said aperture is located at an extremity of the blade and said first projection provided with a respective appendix is formed at the other extremity of the blade.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH14,579/77 | 1977-11-29 | ||
| CH1457977A CH617354A5 (en) | 1977-11-29 | 1977-11-29 | Blade for ice-skates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1102842A true CA1102842A (en) | 1981-06-09 |
Family
ID=4402039
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA306,745A Expired CA1102842A (en) | 1977-11-29 | 1978-07-04 | Ice skate blade with passageway and longitudinal anchors |
| CA000483606A Expired CA1216603B (en) | 1977-11-29 | 1985-06-10 | Ice skate blade with passageway and longitudinal anchors |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000483606A Expired CA1216603B (en) | 1977-11-29 | 1985-06-10 | Ice skate blade with passageway and longitudinal anchors |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS6051914B2 (en) |
| CA (2) | CA1102842A (en) |
| CH (1) | CH617354A5 (en) |
| DE (1) | DE2858337C2 (en) |
| SE (1) | SE441416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6105975A (en) * | 1998-01-30 | 2000-08-22 | Nike, Inc. | Skate blade holding system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1105510A (en) * | 1979-07-13 | 1981-07-21 | George Couture | Skate blade |
| USD992649S1 (en) * | 2021-06-15 | 2023-07-18 | G20 holding SA | Skate assembly for scooter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA585720A (en) * | 1959-10-27 | E. Kirkpatrick John | Ice skate | |
| DE359420C (en) * | 1922-09-22 | Stanley Earle Collinson | Ice skate | |
| CA1067530A (en) * | 1975-08-28 | 1979-12-04 | Alan F. Chambers | Ice skate blade held in synthetic plastic support |
-
1977
- 1977-11-29 CH CH1457977A patent/CH617354A5/en not_active IP Right Cessation
-
1978
- 1978-05-30 DE DE2858337A patent/DE2858337C2/de not_active Expired
- 1978-07-04 CA CA306,745A patent/CA1102842A/en not_active Expired
- 1978-11-27 JP JP53146428A patent/JPS6051914B2/en not_active Expired
- 1978-11-28 SE SE7812262A patent/SE441416B/en not_active IP Right Cessation
-
1985
- 1985-06-10 CA CA000483606A patent/CA1216603B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6105975A (en) * | 1998-01-30 | 2000-08-22 | Nike, Inc. | Skate blade holding system |
Also Published As
| Publication number | Publication date |
|---|---|
| SE7812262L (en) | 1979-05-30 |
| JPS54100838A (en) | 1979-08-08 |
| CA1216603B (en) | 1987-01-13 |
| SE441416B (en) | 1985-10-07 |
| DE2858337C2 (en) | 1989-02-16 |
| JPS6051914B2 (en) | 1985-11-16 |
| CH617354A5 (en) | 1980-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MZSU | Surrender | ||
| MKEX | Expiry |