CA2260531A1 - Device for bringing object to be sharpened into contact with grinding wheel - Google Patents
Device for bringing object to be sharpened into contact with grinding wheel Download PDFInfo
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- CA2260531A1 CA2260531A1 CA 2260531 CA2260531A CA2260531A1 CA 2260531 A1 CA2260531 A1 CA 2260531A1 CA 2260531 CA2260531 CA 2260531 CA 2260531 A CA2260531 A CA 2260531A CA 2260531 A1 CA2260531 A1 CA 2260531A1
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Abstract
A device is disclosed which facilitates vertical aligning between an ice skate clamping jig (20) and a grinding disc (35) or roller (39). The grinding tool is spaced above a planar top (31 a) of a table (31 ) of the sharpening device.
It may be a single grinding tool such as a grinding disc (35) rotated about a vertical axis, or there can provided one disc (35) as described and a grinding roller (39) rotated about a horizontal axis on the same table (31) of the skate sharpening machine. The device has a hand wheel (60, 60a) remote from a jig supporting column (37, 37a) which is mounted close to the grinding tool. The hand wheel (60, 60a) is conveniently located for an operator to readily adjust the instant height of the column (37, 37a) to vertically align the jig (20) and thus the skate runner (23) with the respective grinding tool. The invention significantly speeds up the operation of precise ice skate sharpening.
It may be a single grinding tool such as a grinding disc (35) rotated about a vertical axis, or there can provided one disc (35) as described and a grinding roller (39) rotated about a horizontal axis on the same table (31) of the skate sharpening machine. The device has a hand wheel (60, 60a) remote from a jig supporting column (37, 37a) which is mounted close to the grinding tool. The hand wheel (60, 60a) is conveniently located for an operator to readily adjust the instant height of the column (37, 37a) to vertically align the jig (20) and thus the skate runner (23) with the respective grinding tool. The invention significantly speeds up the operation of precise ice skate sharpening.
Description
DEVICE FOR ALIGNING A SKATE SHARPENING JIG
WITH A GRINDING TOOL
Background of the Invention The present invention relates to ice skate sharpening devices and in particular to skate sharpeners operating with a skate clamping jig having two support legs and a planar, downwardly directed guide surface parallel with the planes of the clamps of the jig.
An example of such jig or clamp is shown in Figure 1. It comprises a lower clamping member having an L-shaped cross section defined by a horizontal flange 11 and a vertical lower jaw 12. The downwardly facing underside 1 1 a formed by a stainless steel layer affixed to the flange 1 1 is precisely ground to a planar shape parallel with the narrow, likewise planar, clamping edge 13. A first corner column 14 is fixedly secured to one end of the clamping member 10. An integrally formed leg 15 projects rearwards from the column 14. It comprises a generally horizontal portion 16 and a vertical portion 17 terminating at a downwardly turned slide surface 18 provided with a Teflon (T"") layer. The teflon layer normally rests on a planar top of a table of a skate sharpening apparatus as will be described. The opposite end of the clamping member 10 is similarly structured with the corresponding parts 15a -18a. Each corner column 14 carries an upwardly projecting threaded stem (not visible in the drawings) passing through a respective cylindric end member 19, 19a integrally formed with an inverted L-shaped upper clamping member including a horizontal flange 21 and a downwardly dependent upper jaw (not visible in Fig. 1 ). The threaded stem of each column 14, 14a passes freely through the associated end member 19, 19a and is engaged by a hand nut 22, 22a. The jig presents a simple holder of the skate ready for sharpening. With the runner 23 secured between the clamping jaws, the downwardly facing side of the runner is parallel with the underside of the lower clamping member.
Accordingly, when the underside 1 1 a is slidably supported by a column, while the teflon surfaces 18, 18a slide on the planar base or table of the sharpening apparatus, the jig is held in a position shown in Fig. 1. Such position can be finely adjusted by raising or lowering the support post or column (not shown in Fig. 1 ~ to vertically align the edge of the runner 23 with the respective sharpening tool.
The described type of jigs is known to have been used with a skate sharpener having a planar table, a grinding disc and a supporting post having a top face spaced vertically above the table and adapted to support the jig holding the skate, by slidably supporting the guide surface. The jig is of a simple structure. Several jigs of different size may be provided for a given sharpening device, to accommodate the desired variety of ice skates, for instance, figure skating, ice hockey, or recreational ice skates.
In competitive or professional sports involving ice skating, e.g. figure skating, ice hockey, speed skating, it is of utmost importance that the skates of the performer be sharpened within very close tolerances to the specific requirements of the skater or skaters. While the ice hockey skates are usually sharpened to provide a radius of the groove at the edge of the skate runner of about 1 /2", the radius of figure skating blades varies from about 3/8" to about 3/4", depending on the performer's preferred skates. In any event, the concave longitudinal groove in the edge of the runner of the skate must be perfectly centred with respect to the cross-section of the edge.
An accurate skate sharpening is significant for success in ice skating sports. Some of hockey teams involved in top competition even bring their own technician with a specific sharpening device to keep the players' skates sharpened to their liking. Indeed, cases have been reported, where the performance of a hockey team participating in a world championship was seriously hampered as its sharpening technician's machine could not be used for difference in voltage of the electric network at the championship venue.
The situation is even more serious and demanding in figure skating. A very slight deviation from the required shape of the edge of the skate runner may inhibit the performance of the competitor and result in substantially lower marks in a competition, often with serious financial consequences where a future professional carrier of a competitor is at stake.
The accuracy of the ice skate sharpening depends on the accuracy of alignment of the edge of the runner with the sharpening disc or roller. To this end, many complex skate clamping jigs exist. However, such jigs have a complicated structure and thus are expensive. Also, they require considerable skill of the operator to adjust.
The jig shown in Fig. 1, provided with two separate legs integrally formed with the lower clamping jaw 12, combined with a support post fixedly secured to the sharpening device near the grinding tool is known to possess the advantage of relatively low production costs while securing the desired flexibility and accuracy.
The jig of this kind requires a supporting post close to the grinding tool.
In prior art devices, the post is threaded into an inner thread of a vertical bore in the table of the sharpening device. A locking nut is used to secure the post at an adjusted height. If it is desired to raise or to lower the post to properly align the clamped skate runner, the jig is removed from the post, the locking nut released and the post turned in the desired direction, followed by the tightening of the locking nut. This is a much simpler operation than the adjustment of other known jigs.
Summary of the Invention It is an object of the present invention to further advance the art of ice skate sharpening by further facilitating the operation of alignment of the skate runner being sharpened with the sharpening or grinding tool.
WITH A GRINDING TOOL
Background of the Invention The present invention relates to ice skate sharpening devices and in particular to skate sharpeners operating with a skate clamping jig having two support legs and a planar, downwardly directed guide surface parallel with the planes of the clamps of the jig.
An example of such jig or clamp is shown in Figure 1. It comprises a lower clamping member having an L-shaped cross section defined by a horizontal flange 11 and a vertical lower jaw 12. The downwardly facing underside 1 1 a formed by a stainless steel layer affixed to the flange 1 1 is precisely ground to a planar shape parallel with the narrow, likewise planar, clamping edge 13. A first corner column 14 is fixedly secured to one end of the clamping member 10. An integrally formed leg 15 projects rearwards from the column 14. It comprises a generally horizontal portion 16 and a vertical portion 17 terminating at a downwardly turned slide surface 18 provided with a Teflon (T"") layer. The teflon layer normally rests on a planar top of a table of a skate sharpening apparatus as will be described. The opposite end of the clamping member 10 is similarly structured with the corresponding parts 15a -18a. Each corner column 14 carries an upwardly projecting threaded stem (not visible in the drawings) passing through a respective cylindric end member 19, 19a integrally formed with an inverted L-shaped upper clamping member including a horizontal flange 21 and a downwardly dependent upper jaw (not visible in Fig. 1 ). The threaded stem of each column 14, 14a passes freely through the associated end member 19, 19a and is engaged by a hand nut 22, 22a. The jig presents a simple holder of the skate ready for sharpening. With the runner 23 secured between the clamping jaws, the downwardly facing side of the runner is parallel with the underside of the lower clamping member.
Accordingly, when the underside 1 1 a is slidably supported by a column, while the teflon surfaces 18, 18a slide on the planar base or table of the sharpening apparatus, the jig is held in a position shown in Fig. 1. Such position can be finely adjusted by raising or lowering the support post or column (not shown in Fig. 1 ~ to vertically align the edge of the runner 23 with the respective sharpening tool.
The described type of jigs is known to have been used with a skate sharpener having a planar table, a grinding disc and a supporting post having a top face spaced vertically above the table and adapted to support the jig holding the skate, by slidably supporting the guide surface. The jig is of a simple structure. Several jigs of different size may be provided for a given sharpening device, to accommodate the desired variety of ice skates, for instance, figure skating, ice hockey, or recreational ice skates.
In competitive or professional sports involving ice skating, e.g. figure skating, ice hockey, speed skating, it is of utmost importance that the skates of the performer be sharpened within very close tolerances to the specific requirements of the skater or skaters. While the ice hockey skates are usually sharpened to provide a radius of the groove at the edge of the skate runner of about 1 /2", the radius of figure skating blades varies from about 3/8" to about 3/4", depending on the performer's preferred skates. In any event, the concave longitudinal groove in the edge of the runner of the skate must be perfectly centred with respect to the cross-section of the edge.
An accurate skate sharpening is significant for success in ice skating sports. Some of hockey teams involved in top competition even bring their own technician with a specific sharpening device to keep the players' skates sharpened to their liking. Indeed, cases have been reported, where the performance of a hockey team participating in a world championship was seriously hampered as its sharpening technician's machine could not be used for difference in voltage of the electric network at the championship venue.
The situation is even more serious and demanding in figure skating. A very slight deviation from the required shape of the edge of the skate runner may inhibit the performance of the competitor and result in substantially lower marks in a competition, often with serious financial consequences where a future professional carrier of a competitor is at stake.
The accuracy of the ice skate sharpening depends on the accuracy of alignment of the edge of the runner with the sharpening disc or roller. To this end, many complex skate clamping jigs exist. However, such jigs have a complicated structure and thus are expensive. Also, they require considerable skill of the operator to adjust.
The jig shown in Fig. 1, provided with two separate legs integrally formed with the lower clamping jaw 12, combined with a support post fixedly secured to the sharpening device near the grinding tool is known to possess the advantage of relatively low production costs while securing the desired flexibility and accuracy.
The jig of this kind requires a supporting post close to the grinding tool.
In prior art devices, the post is threaded into an inner thread of a vertical bore in the table of the sharpening device. A locking nut is used to secure the post at an adjusted height. If it is desired to raise or to lower the post to properly align the clamped skate runner, the jig is removed from the post, the locking nut released and the post turned in the desired direction, followed by the tightening of the locking nut. This is a much simpler operation than the adjustment of other known jigs.
Summary of the Invention It is an object of the present invention to further advance the art of ice skate sharpening by further facilitating the operation of alignment of the skate runner being sharpened with the sharpening or grinding tool.
In general terms, the invention provides a skate sharpening device for use with a skate holding clamp which clamp includes a planar, elongated guide surface parallel with a side surface of an ice skate runner when the latter is clamped in said clamp. The device comprises a base which defines a planar support table having a front, operator's end portion and a rear end portion.
The base also defines a top surface coincident with a generally horizontal reference plane. The base supports, at a point remote from the operator's end, a rotatable grinding tool disposed at a spacing above the reference plane. A
post is mounted on said base proximate to the grinding tool between the grinding tool and the operator's end. It projects vertically upwardly from said table to define an upwardly turned support face spaced vertically above the reference plane. According to the invention, the post is operatively associated with a remote control device secured to said base and including a control member, preferably near said operator's end portion, adapted to selectively adjust the distance between said support face and said reference plane, whereby an instant vertical position of said support face is adjustable from a point remote from said grinding tool.
Brief Description of the Drawings The invention will now be described by way of an operative prototype with reference to the accompanying drawings. In the drawings:
Figure 1 is a diagrammatic perspective view showing the skate clamping jig or clamp for use with the present invention;
Figure 2 is a diagrammatic perspective view of a skate sharpening device showing the jig or clamp in use with one of two skate sharpening tools, a large number of obvious parts such as drive motors debris, exhaust covers of the grinding tools or switches being omitted for clarity;
Figure 3 is a sectional view taken along the section line III-III of Figure 2;
and Figure 4 is an enlarged partial sectional view taken along the section line IV-IV of Fig. 2 Detailed Description of Preferred Embodiments A base 30 defines a support table 31. In the embodiment shown, the table 31 is of a rectangular configuration. It includes a front, operator's end portion 32 and an opposed rear end portion 33. The top surface 31 a is planar and coincides with a generally horizontal reference plane 34 (Fig. 3).
At a point remote from the operator's end 32, the base 30 supports a rotatable grinding tool or disc 35 mounted on a driven spindle 36 which maintains the disc 35 spaced above the plane 34. A post 37 is mounted to the base 30 proximate to the grinding disc 35 between the grind disc 35 and the operator's end 32. The post 37 includes an upwardly turned support face 38.
In a preferred embodiment, a second rotatable grinding tool 39 is provided at a lateral spacing from the disc 35. The second tool 39 has a cylindric grinding surface of the diameter twice the required radius of the runner edge groove of the skate. As mentioned above, such radius is about 1 /2" for an ice hockey skate and is from about 3/8" to about 3/4" for figure skating skates. Thus, the diameter of the grinding tool 39, if used for ice hockey skates (where it may not be required), is about 1 inch and, if used for figure skates, from about 3/4" to about 1 '/2 ". Since the grinding surface of the tool 39 is cylindric, the tool 39 may also be referred to as a "grinding roller"
even though the shape shown is a very short roller and thus resembles a disc.
A driven spindle 40 maintains the roller vertically above the reference plane 34.
A second post 37a is mounted to the base 30 proximate to the roller 39.
The post 37a is of identical structure with the post 37. It includes an upwardly turned support surface 38a.
_7_ For clarity, the post 37 is referred to as "a first post" and the post 37a as "a second post" it being understood that the structure of both the first and the second post and of their control devices to be described is identical.
Therefore, it will suffice if only one control device is described, namely the control device of the "second" post 37a shown in Fig. 3. The representation of this figure shows the post 37a in an operative position where it supports the jig as also indicated in broken lines of Fig. 2.
The control device shown includes a horizontal threaded shaft 41 mounted for rotation and for free axial displacement along its axis, relative to the base 30. The shaft 41 is disposed below the table 31 and includes a threaded portion 42. With particular reference to Fig. 4, a guide nut 43 is engaged with the thread 42. The guide nut includes a pair of axially aligned pivot pins 44, 45, projecting horizontally to both sides of the nut 43 and pivotally mounted to a lower end of a pair of links 46, 47 of a first drive link arrangement. Two locking clips such as a circlip 48 retain the links 46, 47 on the pivots 44, 45.
The upper end of the link arrangement 46, 47 is pivotably secured to a lower end of the post 37a by means of a pivot pin 49 with retaining circlips, of which only the clip 50 is visible in Fig. 3. The lower end of the post 37a is pivotably secured, in the embodiment shown, by the same pivot pin 49, to a pair of links 51 ( 52 the lower ends of which are pivotably secured to a bearing sleeve 53 via sideways projecting journals 54, 55 and circlips 56. Two circlips 57, 58 secured to the smaller diameter end 41 a of the shaft 41 retain axial position of the sleeve 53 while permitting its pivoting on the shaft.
Thus, the link arrangements 46-47 and 51-52 are pivotable about lateral axes which are perpendicular to the elongation of the shaft 41. They generally define an inverted V-shaped arrangement having an upper, apex portion 59 which is pivotable about a transverse axis parallel with the said lateral axes.
_$_ A hand wheel 60a (functionally identical with the hand wheel 60 in Fig.
2) serves the purpose of turning the shaft 41 in one direction or another. The turning of the wheel 60a results in spreading or narrowing the angle between the link arrangements 46-47, 51-52 at the apex portion 59 and thus raises or lowers the post 37 to align the runner 23 with the grinding roller 39 or - in case of the first grinding tool - with the disk 35 rotating about a vertical axis.
The corresponding axial displacement of the shaft 41 takes place at the same time.
In operation, the skate is fixed in the clamp or jig by placing the runner 23 between the clamping jaws and tightening hand nuts 22, 22a. The precisely ground underside 1 1 a of the flange 1 1 is then placed on the support surface 38a and the alignment with the grinding disc 35 or roller 39 checked. Any misalignment is compensated for by manipulating the control wheel 60a with the resulting raising or lowering of the post 37a and thus of the support surface 38a. The skate is then sharpened by sliding the jig supported on the surface 38a with the skate across the roller 39. This provides a precise radius of the groove at the edge of the runner. The grinding roller 39 grinds the runner transversely of its elongation. The grinding roller 39, being of a small diameter, is used only for very few pairs of skates, sometimes only one pair, and is often replaced by a fresh roller.
With the skate having been sharpened by the roller 39, a similar alignment, if required, is made at the post 37 of the grinding disc 35. Again, the alignment can be made quickly and readily by simply operating the hand wheel 60 in a desired manner. The disc 35, whose circumference is dressed to the desired convex cross-sectional radius, is then used to smoothen the groove previously ground by the roller 39. This finishes the sharpening operation by fine grinding tangentially of the elongation of the skate runner.
The described mechanism of alignment of the support surfaces 38, 38a has been tested and surprisingly found to provide quick and precise operation despite its structural simplicity and ease of manufacture. This is not to say that _g_ it could not be substituted by many obvious modifications of a mechanism for raising or lowering the post 36 by operating a remote control which does not necessarily have to be a hand wheel 60. Just as an example, a modification comes to mind which would use two counter-directed threads on the rod 41 engaged with compatible guide nuts, one at each end of the links of the inverted V. Another example may have a mechanism of a raising or lowering nut driven by a bevel gear combined with an upright threaded stem. Even a hydraulic or electrical device may be used for the same purpose providing remote control means for the same purpose. Furthermore, while the use of the two sharpening tools as described is clearly preferred, the principle of remotely controlled raising of the support column can be used in machines having only a single sharpening tool which would preferably use a grinding disc such as disc 35. Such arrangement may be suitable for ice hockey skate sharpening.
The shape of the post is optional as well. While a cylindric column is preferred, other shapes, for instance prisms, can also be used as the supporting posts.
Another readily conceivable modification, while not preferred for complexity, would change the pivoting of the apex portion of the links such that each link arrangements would have a separate transverse pivot axis at the column.
These and many other obvious modifications may differ from the structure described but they do not depart from the scope of present invention as defined in the accompanying claims.
The base also defines a top surface coincident with a generally horizontal reference plane. The base supports, at a point remote from the operator's end, a rotatable grinding tool disposed at a spacing above the reference plane. A
post is mounted on said base proximate to the grinding tool between the grinding tool and the operator's end. It projects vertically upwardly from said table to define an upwardly turned support face spaced vertically above the reference plane. According to the invention, the post is operatively associated with a remote control device secured to said base and including a control member, preferably near said operator's end portion, adapted to selectively adjust the distance between said support face and said reference plane, whereby an instant vertical position of said support face is adjustable from a point remote from said grinding tool.
Brief Description of the Drawings The invention will now be described by way of an operative prototype with reference to the accompanying drawings. In the drawings:
Figure 1 is a diagrammatic perspective view showing the skate clamping jig or clamp for use with the present invention;
Figure 2 is a diagrammatic perspective view of a skate sharpening device showing the jig or clamp in use with one of two skate sharpening tools, a large number of obvious parts such as drive motors debris, exhaust covers of the grinding tools or switches being omitted for clarity;
Figure 3 is a sectional view taken along the section line III-III of Figure 2;
and Figure 4 is an enlarged partial sectional view taken along the section line IV-IV of Fig. 2 Detailed Description of Preferred Embodiments A base 30 defines a support table 31. In the embodiment shown, the table 31 is of a rectangular configuration. It includes a front, operator's end portion 32 and an opposed rear end portion 33. The top surface 31 a is planar and coincides with a generally horizontal reference plane 34 (Fig. 3).
At a point remote from the operator's end 32, the base 30 supports a rotatable grinding tool or disc 35 mounted on a driven spindle 36 which maintains the disc 35 spaced above the plane 34. A post 37 is mounted to the base 30 proximate to the grinding disc 35 between the grind disc 35 and the operator's end 32. The post 37 includes an upwardly turned support face 38.
In a preferred embodiment, a second rotatable grinding tool 39 is provided at a lateral spacing from the disc 35. The second tool 39 has a cylindric grinding surface of the diameter twice the required radius of the runner edge groove of the skate. As mentioned above, such radius is about 1 /2" for an ice hockey skate and is from about 3/8" to about 3/4" for figure skating skates. Thus, the diameter of the grinding tool 39, if used for ice hockey skates (where it may not be required), is about 1 inch and, if used for figure skates, from about 3/4" to about 1 '/2 ". Since the grinding surface of the tool 39 is cylindric, the tool 39 may also be referred to as a "grinding roller"
even though the shape shown is a very short roller and thus resembles a disc.
A driven spindle 40 maintains the roller vertically above the reference plane 34.
A second post 37a is mounted to the base 30 proximate to the roller 39.
The post 37a is of identical structure with the post 37. It includes an upwardly turned support surface 38a.
_7_ For clarity, the post 37 is referred to as "a first post" and the post 37a as "a second post" it being understood that the structure of both the first and the second post and of their control devices to be described is identical.
Therefore, it will suffice if only one control device is described, namely the control device of the "second" post 37a shown in Fig. 3. The representation of this figure shows the post 37a in an operative position where it supports the jig as also indicated in broken lines of Fig. 2.
The control device shown includes a horizontal threaded shaft 41 mounted for rotation and for free axial displacement along its axis, relative to the base 30. The shaft 41 is disposed below the table 31 and includes a threaded portion 42. With particular reference to Fig. 4, a guide nut 43 is engaged with the thread 42. The guide nut includes a pair of axially aligned pivot pins 44, 45, projecting horizontally to both sides of the nut 43 and pivotally mounted to a lower end of a pair of links 46, 47 of a first drive link arrangement. Two locking clips such as a circlip 48 retain the links 46, 47 on the pivots 44, 45.
The upper end of the link arrangement 46, 47 is pivotably secured to a lower end of the post 37a by means of a pivot pin 49 with retaining circlips, of which only the clip 50 is visible in Fig. 3. The lower end of the post 37a is pivotably secured, in the embodiment shown, by the same pivot pin 49, to a pair of links 51 ( 52 the lower ends of which are pivotably secured to a bearing sleeve 53 via sideways projecting journals 54, 55 and circlips 56. Two circlips 57, 58 secured to the smaller diameter end 41 a of the shaft 41 retain axial position of the sleeve 53 while permitting its pivoting on the shaft.
Thus, the link arrangements 46-47 and 51-52 are pivotable about lateral axes which are perpendicular to the elongation of the shaft 41. They generally define an inverted V-shaped arrangement having an upper, apex portion 59 which is pivotable about a transverse axis parallel with the said lateral axes.
_$_ A hand wheel 60a (functionally identical with the hand wheel 60 in Fig.
2) serves the purpose of turning the shaft 41 in one direction or another. The turning of the wheel 60a results in spreading or narrowing the angle between the link arrangements 46-47, 51-52 at the apex portion 59 and thus raises or lowers the post 37 to align the runner 23 with the grinding roller 39 or - in case of the first grinding tool - with the disk 35 rotating about a vertical axis.
The corresponding axial displacement of the shaft 41 takes place at the same time.
In operation, the skate is fixed in the clamp or jig by placing the runner 23 between the clamping jaws and tightening hand nuts 22, 22a. The precisely ground underside 1 1 a of the flange 1 1 is then placed on the support surface 38a and the alignment with the grinding disc 35 or roller 39 checked. Any misalignment is compensated for by manipulating the control wheel 60a with the resulting raising or lowering of the post 37a and thus of the support surface 38a. The skate is then sharpened by sliding the jig supported on the surface 38a with the skate across the roller 39. This provides a precise radius of the groove at the edge of the runner. The grinding roller 39 grinds the runner transversely of its elongation. The grinding roller 39, being of a small diameter, is used only for very few pairs of skates, sometimes only one pair, and is often replaced by a fresh roller.
With the skate having been sharpened by the roller 39, a similar alignment, if required, is made at the post 37 of the grinding disc 35. Again, the alignment can be made quickly and readily by simply operating the hand wheel 60 in a desired manner. The disc 35, whose circumference is dressed to the desired convex cross-sectional radius, is then used to smoothen the groove previously ground by the roller 39. This finishes the sharpening operation by fine grinding tangentially of the elongation of the skate runner.
The described mechanism of alignment of the support surfaces 38, 38a has been tested and surprisingly found to provide quick and precise operation despite its structural simplicity and ease of manufacture. This is not to say that _g_ it could not be substituted by many obvious modifications of a mechanism for raising or lowering the post 36 by operating a remote control which does not necessarily have to be a hand wheel 60. Just as an example, a modification comes to mind which would use two counter-directed threads on the rod 41 engaged with compatible guide nuts, one at each end of the links of the inverted V. Another example may have a mechanism of a raising or lowering nut driven by a bevel gear combined with an upright threaded stem. Even a hydraulic or electrical device may be used for the same purpose providing remote control means for the same purpose. Furthermore, while the use of the two sharpening tools as described is clearly preferred, the principle of remotely controlled raising of the support column can be used in machines having only a single sharpening tool which would preferably use a grinding disc such as disc 35. Such arrangement may be suitable for ice hockey skate sharpening.
The shape of the post is optional as well. While a cylindric column is preferred, other shapes, for instance prisms, can also be used as the supporting posts.
Another readily conceivable modification, while not preferred for complexity, would change the pivoting of the apex portion of the links such that each link arrangements would have a separate transverse pivot axis at the column.
These and many other obvious modifications may differ from the structure described but they do not depart from the scope of present invention as defined in the accompanying claims.
Claims (12)
1. A skate sharpening apparatus for use with a skate holding clamp which clamp includes a downwardly facing planar, elongated guide surface parallel with a side surface of an ice skate runner when the latter is clamped in said clamp, said device comprising:
(a) a base which defines a support table, said table including a front, operator's end portion, a rear end portion and a top surface coincident with a generally horizontal reference plane;
(b) said base supporting, at a point remote from the operator's end portion, a rotatable grinding tool disposed at a spacing above the reference plane;
(c) said base supporting an upright post proximate to said grinding tool and defining an upwardly turned support face spaced vertically above said reference plane;
(d) said post being operatively associated with a control device secured to said base and including a control member remote from the post, preferably near said operator's end portion, and adapted to selectively adjust the distance between said support face and said reference plane;
whereby an instant position of said support face is adjustable from a point remote from said grinding tool.
(a) a base which defines a support table, said table including a front, operator's end portion, a rear end portion and a top surface coincident with a generally horizontal reference plane;
(b) said base supporting, at a point remote from the operator's end portion, a rotatable grinding tool disposed at a spacing above the reference plane;
(c) said base supporting an upright post proximate to said grinding tool and defining an upwardly turned support face spaced vertically above said reference plane;
(d) said post being operatively associated with a control device secured to said base and including a control member remote from the post, preferably near said operator's end portion, and adapted to selectively adjust the distance between said support face and said reference plane;
whereby an instant position of said support face is adjustable from a point remote from said grinding tool.
2. The apparatus of claim 1, wherein the grinding tool is a grinding disc rotatable about a generally vertical axis, whereby the device is particularly suitable for grinding ice hockey or speed skating blades.
3. The apparatus of claim 1, wherein said control device is a mechanical control device.
4. The apparatus of claim 1, wherein said control device includes:
(a) a threaded shaft mounted in said base for rotation about a generally horizontal axis disposed below said table, said shaft including a threaded portion;
(b) a pair of drive link arrangements secured to said shaft and to said post and disposed in an inverted generally V-shaped fashion, (c) an apex portion of the V being pivotably secured to a lower end portion of the post for pivoting each said drive link arrangements relative to the post about a first transverse pivot axis;
(d) a free end of one of said link arrangements remote from said apex portion being pivotally secured to a guide nut engaged with said threaded portion, for pivoting relative to the guide nut, about a second transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(e) a free end of the other of said link arrangements being pivotably secured to a bearing sleeve for pivoting relative to the bearing sleeve about a third transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(f) said bearing sleeve being rotatably mounted on said shaft at an axially retained location thereof, for rotation relative to the retained shaft about a longitudinal axis of the threaded shaft at an axially fixed location of the shaft;
(g) said second and third pivot axes being generally horizontal, parallel with each other and extending laterally of the elongation of said threaded shaft;
(h) said post being vertically slidable relative to said base;
whereby the rotation of said shaft in one direction raises and, in the other, lowers the location of said support face relative to the reference plane.
(a) a threaded shaft mounted in said base for rotation about a generally horizontal axis disposed below said table, said shaft including a threaded portion;
(b) a pair of drive link arrangements secured to said shaft and to said post and disposed in an inverted generally V-shaped fashion, (c) an apex portion of the V being pivotably secured to a lower end portion of the post for pivoting each said drive link arrangements relative to the post about a first transverse pivot axis;
(d) a free end of one of said link arrangements remote from said apex portion being pivotally secured to a guide nut engaged with said threaded portion, for pivoting relative to the guide nut, about a second transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(e) a free end of the other of said link arrangements being pivotably secured to a bearing sleeve for pivoting relative to the bearing sleeve about a third transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(f) said bearing sleeve being rotatably mounted on said shaft at an axially retained location thereof, for rotation relative to the retained shaft about a longitudinal axis of the threaded shaft at an axially fixed location of the shaft;
(g) said second and third pivot axes being generally horizontal, parallel with each other and extending laterally of the elongation of said threaded shaft;
(h) said post being vertically slidable relative to said base;
whereby the rotation of said shaft in one direction raises and, in the other, lowers the location of said support face relative to the reference plane.
5. The apparatus of claim 4, wherein the grinding tool is a grinding disc rotatable about a generally vertical axis, whereby the device is particularly suitable for grinding ice hockey or speed skating blades.
6. A skate sharpening apparatus for use with a skate holding clamp which clamp includes a downwardly facing planar, elongated guide surface parallel with a side surface of an ice skate runner when the latter is clamped in said clamp, said device comprising:
(a) a base which defines a support table, said table including a front, operator's end portion, a rear end portion and a top surface coincident with a generally horizontal reference plane;
(b) said base supporting, at a location remote from the operator's end portion, a rotatable first grinding tool, and a rotatable second grinding tool, said grinding tools being laterally spaced from each other and being each disposed at a spacing above the reference plane;
(c) an upright first post mounted to said base proximate to said first grinding tool between the first grinding tool and the operator's end portion, and a second upright post mounted to said base proximate to said second grinding tool between the first grinding tool and the operator's end portion, each said post defining an upwardly turned support face spaced vertically above said reference plane;
(d) said first post being operatively associated with a first control device secured to said base and said second post being operatively associated with a second control device secured to said base and each said control device including a control member remote from the first or second post, respectively and being adapted to selectively adjust the distance between the support face of the first or second post, and said reference plane;
whereby an instant position of support face of said first or second post is adjustable from a point remote from the first or second grinding tool, respectively.
(a) a base which defines a support table, said table including a front, operator's end portion, a rear end portion and a top surface coincident with a generally horizontal reference plane;
(b) said base supporting, at a location remote from the operator's end portion, a rotatable first grinding tool, and a rotatable second grinding tool, said grinding tools being laterally spaced from each other and being each disposed at a spacing above the reference plane;
(c) an upright first post mounted to said base proximate to said first grinding tool between the first grinding tool and the operator's end portion, and a second upright post mounted to said base proximate to said second grinding tool between the first grinding tool and the operator's end portion, each said post defining an upwardly turned support face spaced vertically above said reference plane;
(d) said first post being operatively associated with a first control device secured to said base and said second post being operatively associated with a second control device secured to said base and each said control device including a control member remote from the first or second post, respectively and being adapted to selectively adjust the distance between the support face of the first or second post, and said reference plane;
whereby an instant position of support face of said first or second post is adjustable from a point remote from the first or second grinding tool, respectively.
7. The apparatus of claim 6, wherein said first grinding tool is a grinding disc rotatable about a first axis perpendicular to said reference plane, and said second grinding tool is a grinding roller rotatable about a second axis parallel with said reference plane.
8. The apparatus of claim 7, wherein the diameter of said grinding roller is from about 3/4" to about 1 1/2".
9. The apparatus of claim 6, wherein said control devices are a first mechanical control device and a second mechanical control device, respectively.
10. The apparatus of claim 6, wherein each of said first and second control device includes:
(a) a threaded shaft mounted in said base for rotation about a generally horizontal axis disposed below said table, said shaft including a threaded portion;
(b) a pair of drive link arrangements secured to said shaft and to said post and disposed in an inverted, generally V-shaped fashion;
(c) an apex portion of the V being pivotably secured to a lower end portion of the post for pivoting each drive link arrangement relative to the post about a first transverse pivot axis;
(d) a free end of one of said link arrangements remote from said apex portion being pivotally secured to a guide nut engaged with said threaded portion, for pivoting relative to the guide nut, about a second transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(e) a free end of the other of said link arrangements being pivotably secured, to a bearing sleeve for pivoting relative to the bearing sleeve about a third transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(f) said bearing sleeve being rotatably mounted on said shaft at an axially retained location of the shaft;
(g) said second and third pivot axes being generally horizontal, parallel with each other and extending laterally of the elongation of said threaded shaft;
(h) said post being vertically slidable relative to said base;
whereby the rotation of the respective threaded shaft in one direction raises and, in the other, lowers the location of said support face of the respective post relative to the reference plane.
(a) a threaded shaft mounted in said base for rotation about a generally horizontal axis disposed below said table, said shaft including a threaded portion;
(b) a pair of drive link arrangements secured to said shaft and to said post and disposed in an inverted, generally V-shaped fashion;
(c) an apex portion of the V being pivotably secured to a lower end portion of the post for pivoting each drive link arrangement relative to the post about a first transverse pivot axis;
(d) a free end of one of said link arrangements remote from said apex portion being pivotally secured to a guide nut engaged with said threaded portion, for pivoting relative to the guide nut, about a second transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(e) a free end of the other of said link arrangements being pivotably secured, to a bearing sleeve for pivoting relative to the bearing sleeve about a third transverse pivot axis generally perpendicular to the axis of said threaded shaft;
(f) said bearing sleeve being rotatably mounted on said shaft at an axially retained location of the shaft;
(g) said second and third pivot axes being generally horizontal, parallel with each other and extending laterally of the elongation of said threaded shaft;
(h) said post being vertically slidable relative to said base;
whereby the rotation of the respective threaded shaft in one direction raises and, in the other, lowers the location of said support face of the respective post relative to the reference plane.
11. The apparatus of claim 10, wherein said first grinding tool is a grinding disc rotatable about a first axis perpendicular to said reference plane, and said second grinding tool is a grinding roller rotatable about a second axis parallel with said reference plane.
12. The apparatus of claim 11, wherein the diameter of said grinding roller is from about 3/4" to about 1 1/2 ".
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ771598 | 1998-02-27 | ||
| CZPUV7715-98 | 1998-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2260531A1 true CA2260531A1 (en) | 1999-08-27 |
Family
ID=29555562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2260531 Abandoned CA2260531A1 (en) | 1998-02-27 | 1999-02-01 | Device for bringing object to be sharpened into contact with grinding wheel |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2260531A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016065237A3 (en) * | 2014-10-24 | 2016-06-16 | Velasa Sports, Inc. | Skate blade sharpening system and method of aligning a grinding component in a skate blade sharpening system |
| US9475175B2 (en) | 2014-10-24 | 2016-10-25 | Velasa Sports, Inc. | Grinding wheel arbor |
| US9517543B2 (en) | 2012-12-21 | 2016-12-13 | Aiguisage Elite Inc. | Blade sharpening system and method of using the same |
| US9566682B2 (en) | 2014-10-24 | 2017-02-14 | Velasa Sports, Inc. | Skate blade retention mechanism |
| US9573236B2 (en) | 2015-05-28 | 2017-02-21 | Velasa Sports, Inc. | Skate blade sharpening system with alignment adjustment using alignment wheel |
| US9669508B2 (en) | 2014-10-24 | 2017-06-06 | Velasa Sports, Inc. | Grinding wheel with identification tag |
| USD793830S1 (en) | 2015-07-08 | 2017-08-08 | Velasa Sports, Inc. | Skate blade sharpening system |
| US9902035B2 (en) | 2014-10-24 | 2018-02-27 | Velasa Sports, Inc. | Compact grinding wheel |
| US10300574B2 (en) | 2014-10-24 | 2019-05-28 | Velasa Sports, Inc. | Skate blade sharpening system |
| CN115139175A (en) * | 2022-08-03 | 2022-10-04 | 武汉市依翎针织有限责任公司 | Full-automatic sewing table plate processing equipment |
| US11969851B2 (en) | 2020-08-10 | 2024-04-30 | Velasa Sports, Inc. | Skate blade sharpening system |
-
1999
- 1999-02-01 CA CA 2260531 patent/CA2260531A1/en not_active Abandoned
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9517543B2 (en) | 2012-12-21 | 2016-12-13 | Aiguisage Elite Inc. | Blade sharpening system and method of using the same |
| US10300574B2 (en) | 2014-10-24 | 2019-05-28 | Velasa Sports, Inc. | Skate blade sharpening system |
| US9475175B2 (en) | 2014-10-24 | 2016-10-25 | Velasa Sports, Inc. | Grinding wheel arbor |
| US9566682B2 (en) | 2014-10-24 | 2017-02-14 | Velasa Sports, Inc. | Skate blade retention mechanism |
| US9669508B2 (en) | 2014-10-24 | 2017-06-06 | Velasa Sports, Inc. | Grinding wheel with identification tag |
| US9902035B2 (en) | 2014-10-24 | 2018-02-27 | Velasa Sports, Inc. | Compact grinding wheel |
| WO2016065237A3 (en) * | 2014-10-24 | 2016-06-16 | Velasa Sports, Inc. | Skate blade sharpening system and method of aligning a grinding component in a skate blade sharpening system |
| US11919119B2 (en) | 2014-10-24 | 2024-03-05 | Velasa Sports, Inc. | Skate blade sharpening system |
| US9573236B2 (en) | 2015-05-28 | 2017-02-21 | Velasa Sports, Inc. | Skate blade sharpening system with alignment adjustment using alignment wheel |
| US10065282B2 (en) | 2015-05-28 | 2018-09-04 | Velasa Sports, Inc. | Skate blade sharpening system with alignment adjustment |
| USD793830S1 (en) | 2015-07-08 | 2017-08-08 | Velasa Sports, Inc. | Skate blade sharpening system |
| US11969851B2 (en) | 2020-08-10 | 2024-04-30 | Velasa Sports, Inc. | Skate blade sharpening system |
| CN115139175A (en) * | 2022-08-03 | 2022-10-04 | 武汉市依翎针织有限责任公司 | Full-automatic sewing table plate processing equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |