CA1115529A - Ice skate sharpening apparatus - Google Patents
Ice skate sharpening apparatusInfo
- Publication number
- CA1115529A CA1115529A CA340,501A CA340501A CA1115529A CA 1115529 A CA1115529 A CA 1115529A CA 340501 A CA340501 A CA 340501A CA 1115529 A CA1115529 A CA 1115529A
- Authority
- CA
- Canada
- Prior art keywords
- grinding wheel
- housing assembly
- work
- tool
- supporting surface
- 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
Abstract
Abstract of the Disclosure Ice skate-sharpening apparatus including a housing assembly carrying a vertically extending drive shaft on which a grinding wheel is mounted. Adjustable mounting means supports the housing assembly on a work table for vertical movement with respect to the work table to position the grinding wheel at a predetermined work-performing posi-tion above the work table. Drive transmission means connects the grinding-wheel drive shaft with a motor that is fixedly mounted at a position adjacent to the work table. The drive transmission means provides for the rotation of the grinding wheel in any of a plurality of vertical positions spaced above the work table. The housing assembly also carries a wheel-dressing tool which is simply moved to a wheel-dressing position.
Description
ICE SKATE-SHARPENING APPARATUS
1 Background o~ the Invention The present invention relates generally to abrasive metal-removing apparatus, and more particularly, to ice skate-sharpening apparatus employing a grin~ing wheel for sharpening ice skate blades.
Conventional ice skate-sharpening apparatus includes a grinding wheel directly connected to a motor which usually is fixedly mounted on a work-supporting surface such as a flat work table so that the grinding wheel rotates at a fixed lC location. An ice skate, either of the hockey or figure type, then is secured to a fixture which is moved on a work-su~port-ing surface or table in a defined path contacting the ice skate blade with the grinding wheel to sharpen the blade along its particular contour. Since the grinding wheel is rotated in a fixed position, the fixture carrying the ice skate must be equipped with adjusting mechanisms capable of vertically and horizontally positioning the ice skate blade relative to the grinding wheel. Such ice skate-carrying fixtures are complex and expensive.
Other ice skate-sharpening mechanisms movably mount the grinding wheel and drive motor as a unit 90 that the grinding wheel itself can be moved relative to the ice ~kate blade. Since the drive ~otor is generally heavy, the opera-tor usually encounters difficulty with the manually operated adjusting mechanisms in making minor adjustments of the posi-tion of the grinding wheel. Also, the structure carrying the grinding wheel and drive motor fails to completely dampen the vibra~ions generated by the motor which results in the ice skate blade being ground with a less-than-ideal surface.
It is therefore the object of the present invention to provide an improved ice skate-sharpening apparatus which is actuated to quickly and accura~ely adjust the grinding wheel to a work-performing position. It is a further object o the present invention to provide i~e skate-sharpening appara-35 tus having an adjustably movable grinding wheel driven by a station~ry drive motor. It i~ a ur~her object o~ the presen~
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1 invention to provide ice skate-sharpening apparatus includ-ing grinding-wheel dressing means which is quickly and accurately moved to positions to dress the grinding wheel.
Summary of the Invention In accordance with the present invention, ice skate-sharpening apparatus is provided consisting of a housing assembly carrying an upright grinding-wheel drive shaft on which a grinding wheel is mounted so that its axis of rota-10 tion extends in a vertical direction. The housing as~embly is mounted for vertical movement on a work-supporting sur-face or table on which a ~ix~ure for carrying an ice skate is movably supported. Adjustable mounting means comprising ' fixed guide members mounted on the work-supporting surface ,'15 and follower members mounted on the housing assembly interfit in telescoping relationships to permit only vertical movement of the housing assembly with respect to the work-supporting surface to locate the grinding wheel at the proper work-per~orming position.
The drive shaft extends downwardly through passage-ways formed in primary guide and follower members and through an opening in the work-supporting sur~ace. A prime mover in the orm o an electric motor is fixedly mounted adjacent to and below the work-supporting surface and drive transmission 25 means in the form of pulleys and a drive belt connects the mo~or outpu~ with the drive shaft and rotates the drive shaft in any of a variety of vertical positions of the grinding wheel.
: The adjustable mounti'ng means further includes posi-30 tioning,means in the ~orm of a stationary support structure that straddles the housin~ assembly and includes a threaded screw which is threadably mounted'on the support structure and connected to the housing ~ssembly. Keversible rotation o the threaded screw member raises and'lowers the houfling assembly to position the grinding wheel in the desired verti-' cal position. Locking means in the orm o a locking nutcarried by the threaded screw functions to maintain the housing ~sembly in its work~perorming position.
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1 The ice skate-sharpening apparatus further includes grinding-wheel dressing means in the form of a dres6ing tool carried by a tool-carrying member that is adjustably mounted on the housing assembly. The tool-carrying member is pivotal between a first inoperative position displaced axially above the grinding wheel and positions in general alignment wit'n the periphery of the grinding wheel with which it is engage-able for purposes o~ dressing the grinding wheel. The tool-carrying member is also movable radially in opposite direc-tions with respect to the ~rinding wheel to move the dreseingtool towards and away from the periphery o~ the grinding wheel.
Further objects, features, and advantages of the present invention will become apparant from a consideration 15 of the following description when taken in connection with the appended claims and the accompanying drawing in which:
. FIGURE 1 is a front elevational view of the ice skate-sharpening apparatus of the present invention;
FIGURE 2 is an enlarged elevational view o the ice skate-sharpening apparatus shown in FIG. 1, illustrating in greater detail the components thereof; and FIGURE 3 i8 a side elevational view of the ice skate-sharpening apparatus shown in FIG. 2 wi~h portio~s broken away for purposes o clarity.
-25 Description o~ the Preferred_Embodiment Before explaining the present invention in detail, it is to be understood that the invention i9 not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the 30 invention is capable of other embodiments and of being prac-ticed or carried out in various wàys. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation, Referring to the drawing, the ice skate-sharpening 35 apparatus of ~he present invention, indicated generally at 0, iB shown in FIG. 1 comprising a housing ~sseT~bly 14 which ~ ~ . -, -, . ~.
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1 carries a drive shat 16 on which is mounted a grinding wheel 18. The axis of rotation 20 of the grinding wheel 18 and the drive shaft 16 extends in a vertical direction. The housing assembly 14 is adjustably unted for up and down S movement on a work-supporting surface such as the flat work ~able 22 which is supported by a frame 25. An opening 23 is formed through the work table 22. The drive shaft 16 extends through the opening 23 to positions below the work ,table 22. A prime mover 24 in the form of an electric motor 1~ is fixedly mounted on the frame 25. A pulley 28 is mounted on the drive shaft 16 and a pulley 30 is mounted on the out-put shaft o the electric motor 24 with a drive belt 29 connecting the pulleys 28 and 30. These components form drive transmission means connecting the output o the prime 15 mover 24 with the drive shaft 16. The drive transmissionmeans operates to rotate the grinding wheel 18 in any of a variety of vertical positions. Thus, up and down movement of the drive shaft 16 and the grinding wheel 18 are accomo-dated by the pulley and belt arrangement BO ~hat the grind-20 ing motor 24 can be maintained in a ~ixed position. As canbe seen in FIG. 1 at the broken lines 31, the drive belt 29 will con~inue ~o drive ~he drive shaft 16 when the pulleys 28 and 30 are.vertically displaced with respect to each other.
Thu8, the grinding wheel 18 is isolated from mo~or vibrations 25 and can be adjusted without movement of the motor 24.
The housing assembly 14 is adjustably mounted for l:
vertical movement on the work table 2.2 by adjustable mounting means 34. The housing asse~bly 14 includes a casing 36 which .- substan.~ially surrounds the grinding wheel 18 insuring safe grinding of ~he ice ska~e blade 12 (FIG. 3). An opening 37 (FIG. 3) is provided in the casing 36 through which a portion - . of the grinding wheel 18 protrudes allowing the ice skate blade 12 to engage the grinding wheel 18.
The adiustable mounting means 34 includes a primary : 35 guide member 38 (FIG. 2) which consists of a hollow cylindri-cal tube ~h~;t i8 fi~edly mounted on ~he work table 22. The , . , ~ .
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1 primary guide member 38 has an upright passageway 40 com-munieating with the opening 23 and has an upright axis 42 that coincides with the upright axis 20. The casing 36 carries a primary follower member 44 having a hollow cylin-drical construction similar to the construction of theprimary guide member 38 except that the outer diameter of the primary follower member 44 corresponds to the inner diameter of the guide member 38 enabling the follower member 44 to be slidably telescoped into the guide member 38. The 10 primary follower member 44 also has an upright axis that coincides with the upright axes 20 and 42. Auxiliary up-right guide or pin members 46, of which three are employed, are mounted on the work table 22. Secondary follower mem-bers in the form of hollow sleeves 48 are carried by the 15 housing assembly 14 and are slidably telescoped with the guide members 46 provid~ng for only vertical movement of the housing assembly relative to the work table. As seen with reference ~o FIGS. 2 and 3, the auxiliary guide and follower members 46 and 48 are arranged on both sides and 20 rearwardly of the primary guide and follower members 38 and 44 to define a triangle. This arrangement insures that only vertical movement of the houeing asse~bly wlll occur free of undesirable tilting.
The drive shaft 16 is rotatably mounted on the hous-25 ing assembly 14, as can best be seen in FIG. 2, by a pair of spaced-apart bearings 50 an~ 52 that are axi.ally positioned in the passageway of the follower 44. A spacer 54 maintains the axial spacing between the bearings 50 and 52 which cooperate to support the drive shaft 16 and the grinding 30 wheel 18 on the housing assembly 14 for rotation about the upright axis 20. The bearings 50 and 52 are press fitted in the follower 44 and ~ightly engage the drive shaft 16 provid ing for its rotation and up and down movement coincidental with the movement of the housing assem~ly 14. Further, the 35 bearings 50 and 52 cooperate to maintain the ver~ical sta-bil~y of the drive shaft 16 and hence ~he grinding wheel 18.
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1 The adjustable mounting means further includes positioning means in the form of a stationary support structure comprising an inverted U-shaped assembly 58 which straddles the housing assembly 14. The U-shaped assambly 58 includes a cross bar 60 positioned on upright legs 61 above the housing assembly 14. A threaded bore Ç2 is formed in the cross bar 60 and receives a threaded screw 64 having a knurled knob 65 allowing manual rotation of the screw 64. The end of the screw 64 iB rotatably secured 10 to the housing assembly 14 by means of a scrPw member 67 which is threaded into the end of the ~crew 64 which is rotatably received in a cap 68 secwred to the casing 36 for slidable movement relati~e thereto. Accordingly, revers-ible rotation of the screw member 64 in the bore 62 raises and lowers the housing assembly 14 to locate the grinding wheel in the predetermined work-performing position. Lock-ing means in the ~orm of a nut 70 is threadably mounted on the screw member 64 above the cross member 60. Tightening the nut 70 against the cross member 60 prevents further 20 rotation of the screw member 64 in a direction which would lower the housing assembly 14. Accordingly~ the predetermined work-per~orming position o the grinding wheel 18 is ~nain~ .
tained.
The housing assembly 14 also carries wheel~dressing 25 means consisting of a dressi~g tool 74 (FIG. 1) that i8 carried by a U-shaped tool-carrying member 76 extending across the housing assembly 14. The member 76 has legs 78 and a main portion 79 that are pivotally mounted to a pair o draw bars 80 slidably disposed in longitudinally extending channels 81 on opposite sides of t'ne housing assembly 14.
The draw bars 80 are moved back and forth with respect to the housing assembly 14 by an adju~ting mechanism w~ich consist~
of a screw member 82 that is threadably mounted in a bore formed through an ac~uator bar 84 that extends across the 35 rear portion of the casing 36 and connects to the draw bars 80 ~o provide for their simultaneous back and for~h movemen~. I
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-, ~, . " ~ ` . , , ' ~ ' 1 The screw member 82 extends through the actuator bar 84 and is connec~ed to the casing 36 in a manner similar to the connection of the screw member, 64 to the casing 36. Simi larly, the screw member 82 is mounted on the bar 84 in a manner corresponding to the mounting o ~he screw mem~er 64 to the cross bar 60. Reversible rotation of the screw 82 moves the draw bars 80 and therefore the tool-carrying member 76 back and forth.
The tool-carrying member 76 can be pivoted between an 10 upright inoperative or ~irs~ position as shown in FIG. 3 wherein the dressing tool 74 is displaced axially above the grinding wheel 18 and positions in which the dressing tool 74 is in general alignment with the periphery of the grinding wheel 18. This pivotal movemen~ of the dressing ~ool 74 15 along with its radial inward and outward movement provi~d by the draw bars 80 and the adjusting mechanism enables the grinding wheel 18 to be quickly and easily drsssed to main-tain the proper wheel surface.
In operation, assume the ice skate 12, as shown in' 20 FIG. 3, is mounted on a fixture (not shown) wherein the blade projects in a horizontal direction. The fixture is placed on the work table 22 and i8 movable to engage ~he ; blade wi~h ~he grinding wheel 18. The threaded screw member 64 is rotated ~o either raise or lower the grinding wheel 18 25 so that it is in the precise work-perorming position, as shown in FIG. 3; this position, of course, usually varying for different types of skates. The lock nut 70 then iB
i tightened against the cross bar 60 preventing further down-ward mo~ement of the housing assembly 14. The drive moto'r 24 30 is actuated and the sharpening operation is performed.
Because the drive transmission meàns ~omprises the pulley and ' belt arrangement, the grinding wheel 18 can be raised and lowered wi~hout shutting down ~he mo~or which, as explained I , earlier, is maintained in a fixed position. In this manner, 35 the precise vertical position of the grinding wheel 18 rela-tive to the ice skate blade can be quickly establi6hed and . .
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1 adjusted. When the grindi~g wheel 18 requires dressing, the me~ber 76 is pivotted forwardly and downwardly t~ bring th~
dressing tool 74 in alignment with the grinding surface of the wheel 18. The screw member 82 is then actuated to move the tool 74 towards and away from the wheel 18 to properly dress it.
From the above description, it can be seen that the present invention provides an improved ice skate-sharpening apparatus in which the grinding wheel 18 can be accurately lO and quickly moved verticaLly relative to the work table 22 to predetermined work-performing positions. The adjusting movement of the grinding wheel is performed without any movement of the drive motor 24 thereby minimizing the e~fort and complex mechanisms tha~ would otherwise be required.
15 The vibrations of the motor 24 are isolated from the grind^
ing wheel insuring that the ice skate blade is properly sharpened. Provision of the grinding-wheel dressing tool on the housing assembly decreases the time required ~or accurate dressing of the grinding wheel 18.
What is claimed:
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1 Background o~ the Invention The present invention relates generally to abrasive metal-removing apparatus, and more particularly, to ice skate-sharpening apparatus employing a grin~ing wheel for sharpening ice skate blades.
Conventional ice skate-sharpening apparatus includes a grinding wheel directly connected to a motor which usually is fixedly mounted on a work-supporting surface such as a flat work table so that the grinding wheel rotates at a fixed lC location. An ice skate, either of the hockey or figure type, then is secured to a fixture which is moved on a work-su~port-ing surface or table in a defined path contacting the ice skate blade with the grinding wheel to sharpen the blade along its particular contour. Since the grinding wheel is rotated in a fixed position, the fixture carrying the ice skate must be equipped with adjusting mechanisms capable of vertically and horizontally positioning the ice skate blade relative to the grinding wheel. Such ice skate-carrying fixtures are complex and expensive.
Other ice skate-sharpening mechanisms movably mount the grinding wheel and drive motor as a unit 90 that the grinding wheel itself can be moved relative to the ice ~kate blade. Since the drive ~otor is generally heavy, the opera-tor usually encounters difficulty with the manually operated adjusting mechanisms in making minor adjustments of the posi-tion of the grinding wheel. Also, the structure carrying the grinding wheel and drive motor fails to completely dampen the vibra~ions generated by the motor which results in the ice skate blade being ground with a less-than-ideal surface.
It is therefore the object of the present invention to provide an improved ice skate-sharpening apparatus which is actuated to quickly and accura~ely adjust the grinding wheel to a work-performing position. It is a further object o the present invention to provide i~e skate-sharpening appara-35 tus having an adjustably movable grinding wheel driven by a station~ry drive motor. It i~ a ur~her object o~ the presen~
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1 invention to provide ice skate-sharpening apparatus includ-ing grinding-wheel dressing means which is quickly and accurately moved to positions to dress the grinding wheel.
Summary of the Invention In accordance with the present invention, ice skate-sharpening apparatus is provided consisting of a housing assembly carrying an upright grinding-wheel drive shaft on which a grinding wheel is mounted so that its axis of rota-10 tion extends in a vertical direction. The housing as~embly is mounted for vertical movement on a work-supporting sur-face or table on which a ~ix~ure for carrying an ice skate is movably supported. Adjustable mounting means comprising ' fixed guide members mounted on the work-supporting surface ,'15 and follower members mounted on the housing assembly interfit in telescoping relationships to permit only vertical movement of the housing assembly with respect to the work-supporting surface to locate the grinding wheel at the proper work-per~orming position.
The drive shaft extends downwardly through passage-ways formed in primary guide and follower members and through an opening in the work-supporting sur~ace. A prime mover in the orm o an electric motor is fixedly mounted adjacent to and below the work-supporting surface and drive transmission 25 means in the form of pulleys and a drive belt connects the mo~or outpu~ with the drive shaft and rotates the drive shaft in any of a variety of vertical positions of the grinding wheel.
: The adjustable mounti'ng means further includes posi-30 tioning,means in the ~orm of a stationary support structure that straddles the housin~ assembly and includes a threaded screw which is threadably mounted'on the support structure and connected to the housing ~ssembly. Keversible rotation o the threaded screw member raises and'lowers the houfling assembly to position the grinding wheel in the desired verti-' cal position. Locking means in the orm o a locking nutcarried by the threaded screw functions to maintain the housing ~sembly in its work~perorming position.
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1 The ice skate-sharpening apparatus further includes grinding-wheel dressing means in the form of a dres6ing tool carried by a tool-carrying member that is adjustably mounted on the housing assembly. The tool-carrying member is pivotal between a first inoperative position displaced axially above the grinding wheel and positions in general alignment wit'n the periphery of the grinding wheel with which it is engage-able for purposes o~ dressing the grinding wheel. The tool-carrying member is also movable radially in opposite direc-tions with respect to the ~rinding wheel to move the dreseingtool towards and away from the periphery o~ the grinding wheel.
Further objects, features, and advantages of the present invention will become apparant from a consideration 15 of the following description when taken in connection with the appended claims and the accompanying drawing in which:
. FIGURE 1 is a front elevational view of the ice skate-sharpening apparatus of the present invention;
FIGURE 2 is an enlarged elevational view o the ice skate-sharpening apparatus shown in FIG. 1, illustrating in greater detail the components thereof; and FIGURE 3 i8 a side elevational view of the ice skate-sharpening apparatus shown in FIG. 2 wi~h portio~s broken away for purposes o clarity.
-25 Description o~ the Preferred_Embodiment Before explaining the present invention in detail, it is to be understood that the invention i9 not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the 30 invention is capable of other embodiments and of being prac-ticed or carried out in various wàys. Also, it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation, Referring to the drawing, the ice skate-sharpening 35 apparatus of ~he present invention, indicated generally at 0, iB shown in FIG. 1 comprising a housing ~sseT~bly 14 which ~ ~ . -, -, . ~.
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1 carries a drive shat 16 on which is mounted a grinding wheel 18. The axis of rotation 20 of the grinding wheel 18 and the drive shaft 16 extends in a vertical direction. The housing assembly 14 is adjustably unted for up and down S movement on a work-supporting surface such as the flat work ~able 22 which is supported by a frame 25. An opening 23 is formed through the work table 22. The drive shaft 16 extends through the opening 23 to positions below the work ,table 22. A prime mover 24 in the form of an electric motor 1~ is fixedly mounted on the frame 25. A pulley 28 is mounted on the drive shaft 16 and a pulley 30 is mounted on the out-put shaft o the electric motor 24 with a drive belt 29 connecting the pulleys 28 and 30. These components form drive transmission means connecting the output o the prime 15 mover 24 with the drive shaft 16. The drive transmissionmeans operates to rotate the grinding wheel 18 in any of a variety of vertical positions. Thus, up and down movement of the drive shaft 16 and the grinding wheel 18 are accomo-dated by the pulley and belt arrangement BO ~hat the grind-20 ing motor 24 can be maintained in a ~ixed position. As canbe seen in FIG. 1 at the broken lines 31, the drive belt 29 will con~inue ~o drive ~he drive shaft 16 when the pulleys 28 and 30 are.vertically displaced with respect to each other.
Thu8, the grinding wheel 18 is isolated from mo~or vibrations 25 and can be adjusted without movement of the motor 24.
The housing assembly 14 is adjustably mounted for l:
vertical movement on the work table 2.2 by adjustable mounting means 34. The housing asse~bly 14 includes a casing 36 which .- substan.~ially surrounds the grinding wheel 18 insuring safe grinding of ~he ice ska~e blade 12 (FIG. 3). An opening 37 (FIG. 3) is provided in the casing 36 through which a portion - . of the grinding wheel 18 protrudes allowing the ice skate blade 12 to engage the grinding wheel 18.
The adiustable mounting means 34 includes a primary : 35 guide member 38 (FIG. 2) which consists of a hollow cylindri-cal tube ~h~;t i8 fi~edly mounted on ~he work table 22. The , . , ~ .
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1 primary guide member 38 has an upright passageway 40 com-munieating with the opening 23 and has an upright axis 42 that coincides with the upright axis 20. The casing 36 carries a primary follower member 44 having a hollow cylin-drical construction similar to the construction of theprimary guide member 38 except that the outer diameter of the primary follower member 44 corresponds to the inner diameter of the guide member 38 enabling the follower member 44 to be slidably telescoped into the guide member 38. The 10 primary follower member 44 also has an upright axis that coincides with the upright axes 20 and 42. Auxiliary up-right guide or pin members 46, of which three are employed, are mounted on the work table 22. Secondary follower mem-bers in the form of hollow sleeves 48 are carried by the 15 housing assembly 14 and are slidably telescoped with the guide members 46 provid~ng for only vertical movement of the housing assembly relative to the work table. As seen with reference ~o FIGS. 2 and 3, the auxiliary guide and follower members 46 and 48 are arranged on both sides and 20 rearwardly of the primary guide and follower members 38 and 44 to define a triangle. This arrangement insures that only vertical movement of the houeing asse~bly wlll occur free of undesirable tilting.
The drive shaft 16 is rotatably mounted on the hous-25 ing assembly 14, as can best be seen in FIG. 2, by a pair of spaced-apart bearings 50 an~ 52 that are axi.ally positioned in the passageway of the follower 44. A spacer 54 maintains the axial spacing between the bearings 50 and 52 which cooperate to support the drive shaft 16 and the grinding 30 wheel 18 on the housing assembly 14 for rotation about the upright axis 20. The bearings 50 and 52 are press fitted in the follower 44 and ~ightly engage the drive shaft 16 provid ing for its rotation and up and down movement coincidental with the movement of the housing assem~ly 14. Further, the 35 bearings 50 and 52 cooperate to maintain the ver~ical sta-bil~y of the drive shaft 16 and hence ~he grinding wheel 18.
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1 The adjustable mounting means further includes positioning means in the form of a stationary support structure comprising an inverted U-shaped assembly 58 which straddles the housing assembly 14. The U-shaped assambly 58 includes a cross bar 60 positioned on upright legs 61 above the housing assembly 14. A threaded bore Ç2 is formed in the cross bar 60 and receives a threaded screw 64 having a knurled knob 65 allowing manual rotation of the screw 64. The end of the screw 64 iB rotatably secured 10 to the housing assembly 14 by means of a scrPw member 67 which is threaded into the end of the ~crew 64 which is rotatably received in a cap 68 secwred to the casing 36 for slidable movement relati~e thereto. Accordingly, revers-ible rotation of the screw member 64 in the bore 62 raises and lowers the housing assembly 14 to locate the grinding wheel in the predetermined work-performing position. Lock-ing means in the ~orm of a nut 70 is threadably mounted on the screw member 64 above the cross member 60. Tightening the nut 70 against the cross member 60 prevents further 20 rotation of the screw member 64 in a direction which would lower the housing assembly 14. Accordingly~ the predetermined work-per~orming position o the grinding wheel 18 is ~nain~ .
tained.
The housing assembly 14 also carries wheel~dressing 25 means consisting of a dressi~g tool 74 (FIG. 1) that i8 carried by a U-shaped tool-carrying member 76 extending across the housing assembly 14. The member 76 has legs 78 and a main portion 79 that are pivotally mounted to a pair o draw bars 80 slidably disposed in longitudinally extending channels 81 on opposite sides of t'ne housing assembly 14.
The draw bars 80 are moved back and forth with respect to the housing assembly 14 by an adju~ting mechanism w~ich consist~
of a screw member 82 that is threadably mounted in a bore formed through an ac~uator bar 84 that extends across the 35 rear portion of the casing 36 and connects to the draw bars 80 ~o provide for their simultaneous back and for~h movemen~. I
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-, ~, . " ~ ` . , , ' ~ ' 1 The screw member 82 extends through the actuator bar 84 and is connec~ed to the casing 36 in a manner similar to the connection of the screw member, 64 to the casing 36. Simi larly, the screw member 82 is mounted on the bar 84 in a manner corresponding to the mounting o ~he screw mem~er 64 to the cross bar 60. Reversible rotation of the screw 82 moves the draw bars 80 and therefore the tool-carrying member 76 back and forth.
The tool-carrying member 76 can be pivoted between an 10 upright inoperative or ~irs~ position as shown in FIG. 3 wherein the dressing tool 74 is displaced axially above the grinding wheel 18 and positions in which the dressing tool 74 is in general alignment with the periphery of the grinding wheel 18. This pivotal movemen~ of the dressing ~ool 74 15 along with its radial inward and outward movement provi~d by the draw bars 80 and the adjusting mechanism enables the grinding wheel 18 to be quickly and easily drsssed to main-tain the proper wheel surface.
In operation, assume the ice skate 12, as shown in' 20 FIG. 3, is mounted on a fixture (not shown) wherein the blade projects in a horizontal direction. The fixture is placed on the work table 22 and i8 movable to engage ~he ; blade wi~h ~he grinding wheel 18. The threaded screw member 64 is rotated ~o either raise or lower the grinding wheel 18 25 so that it is in the precise work-perorming position, as shown in FIG. 3; this position, of course, usually varying for different types of skates. The lock nut 70 then iB
i tightened against the cross bar 60 preventing further down-ward mo~ement of the housing assembly 14. The drive moto'r 24 30 is actuated and the sharpening operation is performed.
Because the drive transmission meàns ~omprises the pulley and ' belt arrangement, the grinding wheel 18 can be raised and lowered wi~hout shutting down ~he mo~or which, as explained I , earlier, is maintained in a fixed position. In this manner, 35 the precise vertical position of the grinding wheel 18 rela-tive to the ice skate blade can be quickly establi6hed and . .
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1 adjusted. When the grindi~g wheel 18 requires dressing, the me~ber 76 is pivotted forwardly and downwardly t~ bring th~
dressing tool 74 in alignment with the grinding surface of the wheel 18. The screw member 82 is then actuated to move the tool 74 towards and away from the wheel 18 to properly dress it.
From the above description, it can be seen that the present invention provides an improved ice skate-sharpening apparatus in which the grinding wheel 18 can be accurately lO and quickly moved verticaLly relative to the work table 22 to predetermined work-performing positions. The adjusting movement of the grinding wheel is performed without any movement of the drive motor 24 thereby minimizing the e~fort and complex mechanisms tha~ would otherwise be required.
15 The vibrations of the motor 24 are isolated from the grind^
ing wheel insuring that the ice skate blade is properly sharpened. Provision of the grinding-wheel dressing tool on the housing assembly decreases the time required ~or accurate dressing of the grinding wheel 18.
What is claimed:
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Claims (7)
- Claim 1. Ice skate-sharpening apparatus comprising means defining a horizontal work-supporting surface having an opening extending vertically therethrough, a drive shaft extending vertically through said opening and having a vertical axis of rotation, a grinding wheel positioned for rotation in a generally horizontal plane and mounted on said drive shaft for rotation therewith, a grinding wheel housing assembly supporting said grinding wheel and said drive shaft for rotation of the grinding wheel in said horizontal plane, adjustable mounting means supporting said housing assembly for vertical movement with respect to said work-supporting surface to position said grinding wheel at any one of a plurality of selected work-performing positions above said work-supporting surface, said adjustable mounting means including a hollow tubular guide member spaced radially outwardly from and enclosing said shaft and fixedly mounted on said work-supporting surface, a hollow tubular follower member telescoped with said hollow tubular member for guided vertical movement relative thereto and connected to said drive shaft for vertical movement therewith, and vertical positioning means mounted on said work-supporting surface and connected to said housing assembly for vertically positioning said housing assembly and thereby said grinding wheel relative to said work-supporting surface, a prime mover for rotating the grinding wheel, said prime mover being mounted beneath said work-supporting surface in a fixed position essentially vibrationally isolated from said grinding wheel and said adjustable mounting means, drive transmission means connecting said prime mover with said drive shaft for rotation of said drive shaft and thereby said grinding wheel in any of said plurality of selected work-performing positions, said drive transmission means being connected at one end to said drive shaft and at the other end to said prime mover, said one end being freely movable vertically together with said drive shaft, said adjustable mounting means being mounted on said work-supporting surface on said housing assembly and being operable to adjust the vertical position of said housing assembly and thereby said grinding wheel relative to said work-supporting surface so that an ice skate blade can be supported at a fixed elevation on said work-supporting surface and the position of said grinding wheel can be adjusted relative to the blade to enable the blade to be sharpened in an optimum manner.
- Claim 2. The ice skate-sharpening apparatus that is defined in claim 1, wherein said adjustable mounting means includes a plurality of additional guide members fixedly mounted on said work-supporting surface and located radially outwardly from said first guide member, and a plurality of follower members mounted on said housing assembly, each of said follower members being interfitted in a telescoping relationship with an associated one of said guide members to permit vertical movement of said housing assembly relative to said work-supporting surface and to provide additional stability for said housing assembly.
- Claim 3. The ice skate-sharpening apparatus that is defined in claim 1, wherein said positioning means includes an inverted U-shaped support structure having its lower ends mounted on said work-supporting surface and its upper portion bridging over said housing assembly, and a threaded member threadedly mounted in said upper portion and connected to said housing assembly, said threaded member being rotatable to vary the vertical height of said housing assembly.
- Claim 4. The ice skate-sharpening apparatus that is defined in claim 3, wherein said adjustable mounting means includes locking means engageable with said threaded member and said support structure for restraining movement of said threaded member to maintain said housing assembly in a predetermined vertical position.
- Claim 5. The ice skate-sharpening apparatus that is defined in claim 1, wherein said hollow tubular guide member has an axis coinciding with said vertical axis, said hollow tubular follower member having a passageway with an axis also coinciding with said vertical axis, and bearing means disposed in said hollow tubular follower member for maintaining said drive shaft in an axially fixed position relative to said housing assembly so that said drive shaft is moved axially coincidentally with said housing assembly.
- Claim 6. The ice skate-sharpening apparatus that is defined in claim 1, including grinding-wheel dressing means, said grinding-wheel dressing means including a dressing tool, and a tool-carrying member on which said dress-ing tool is mounted, means mounting said tool-carrying member on said housing assembly for pivotal movement between a position in which said tool is displaced axially from said grinding wheel and positions in which said tool is in general alignment with the periphery of said grinding wheel, said means mounting said tool-carrying member also providing for the longtudinal movement of said tool-carrying member toward and away from said grinding wheel so that said dressing tool can engage and dress said grinding wheel.
- Claim 7. The ice skate-sharpening apparatus that is defined in claim 6, wherein said mounting means for said tool-carrying member is operable to move said tool-carrying member generally radially toward and away from said grinding wheel so that said dressing tool can engage and dress said grinding wheel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96474378A | 1978-11-29 | 1978-11-29 | |
| US964,743 | 1992-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1115529A true CA1115529A (en) | 1982-01-05 |
Family
ID=25508925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA340,501A Expired CA1115529A (en) | 1978-11-29 | 1979-11-23 | Ice skate sharpening apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1115529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127194A (en) * | 1990-08-10 | 1992-07-07 | Jobin Jeane Pierre | Apparatus for sharpening the blade of a skate |
-
1979
- 1979-11-23 CA CA340,501A patent/CA1115529A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127194A (en) * | 1990-08-10 | 1992-07-07 | Jobin Jeane Pierre | Apparatus for sharpening the blade of a skate |
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| Date | Code | Title | Description |
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| MKEX | Expiry |