CA2643560C - Ice scraper blade assembly - Google Patents
Ice scraper blade assembly Download PDFInfo
- Publication number
- CA2643560C CA2643560C CA2643560A CA2643560A CA2643560C CA 2643560 C CA2643560 C CA 2643560C CA 2643560 A CA2643560 A CA 2643560A CA 2643560 A CA2643560 A CA 2643560A CA 2643560 C CA2643560 C CA 2643560C
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- Canada
- Prior art keywords
- blade
- layer
- machinable
- bottom wall
- ice
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- 239000000463 material Substances 0.000 claims abstract description 56
- 238000007790 scraping Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000003754 machining Methods 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims 2
- 238000001125 extrusion Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000003801 milling Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H4/00—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow
- E01H4/02—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow for sporting purposes, e.g. preparation of ski trails; Construction of artificial surfacings for snow or ice sports ; Trails specially adapted for on-the-snow vehicles, e.g. devices adapted for ski-trails
- E01H4/023—Maintaining surfaces for ice sports, e.g. of skating rinks
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
An ice scraper blade assembly is arranged to be supported on an ice scraping device for movement across a sheet of ice to extend transversely to a forward working direction. The assembly includes an extruded steel beam having a layer of machinable material secured along a bottom side of the beam which differs from the material of the beam. A blade is fastened below the layer of machinable material using bolts connected between the blade and the beam. The blade can be straightened and levelled by machining the layer of material on the bottom of the beam so that the extruded beam remains fully intact during the straightening and levelling process and accordingly thermal deformation of the beam during use is predictable and can be accommodated for when machining the layer of machinable material.
Description
ICE SCRAPER BLADE ASSEMBLY
FIELD OF THE INVENTION
The present invention relates to a blade assembly for ice cleaning and levelling equipment, and more particularly relates to a blade assembly for scraping ice for sporting events.
BACKGROUND
In various sports that are played on an ice surface, it is important to maintain a level surface to avoid interference with the play of a game. This is particularly important in the game of curling, since any irreguiarity in the ice surface will cause unwanted movement of a rock across the ice sheet, or an inhibition of such movement when it is desired. To ensure surface regularity, the ice is periodically scraped with a blade. The blade edge must be perfectly linear to ensure the desired flat ice surface.
Most commonly prior art scraper blades have been configured with a main box beam support comprising an extruded hollow tube member onto which the blade is mounted. A significant problem with this arrangement is the thermal deformation of the box beam when the scraper is placed on the ice surface.
Furthermore, a bottom side of the beam typically requires levelling to form a sufficiently level surface to support the blade in a straight configuration thereon. The surface cannot be effectively machined to form the required level surface as machining of the extruded member affects the balance of internal stresses in the beam leading to warping of the beam. The levelling must therefore be accomplished by time consuming placement of various shims between the blade and beam, typically on a trial and error basis.
Canadian Patent Applications 2,451,886 and 2,538,970, both by Albert Thompson, discloses improved beam designs in which the beam comprises a cast
FIELD OF THE INVENTION
The present invention relates to a blade assembly for ice cleaning and levelling equipment, and more particularly relates to a blade assembly for scraping ice for sporting events.
BACKGROUND
In various sports that are played on an ice surface, it is important to maintain a level surface to avoid interference with the play of a game. This is particularly important in the game of curling, since any irreguiarity in the ice surface will cause unwanted movement of a rock across the ice sheet, or an inhibition of such movement when it is desired. To ensure surface regularity, the ice is periodically scraped with a blade. The blade edge must be perfectly linear to ensure the desired flat ice surface.
Most commonly prior art scraper blades have been configured with a main box beam support comprising an extruded hollow tube member onto which the blade is mounted. A significant problem with this arrangement is the thermal deformation of the box beam when the scraper is placed on the ice surface.
Furthermore, a bottom side of the beam typically requires levelling to form a sufficiently level surface to support the blade in a straight configuration thereon. The surface cannot be effectively machined to form the required level surface as machining of the extruded member affects the balance of internal stresses in the beam leading to warping of the beam. The levelling must therefore be accomplished by time consuming placement of various shims between the blade and beam, typically on a trial and error basis.
Canadian Patent Applications 2,451,886 and 2,538,970, both by Albert Thompson, discloses improved beam designs in which the beam comprises a cast
-2-metal member which is less sensitive to thermal deformation. The blade can thus be more reliably levelled and straightened along the beam; however, a cast beam can be costly to manufacture.
SUMMARY
According to one aspect of the present invention there is provided an ice scraper blade assembly for being supported on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the assembly comprising:
a beam arranged to be supported on the ice scraping device such that the beam is elongate in a lateral direction which is transverse to the forward working direction, the beam having a bottom wall extending in the lateral direction along a bottom side of the beam;
a layer of machinable material secured to the bottom wall of the.beam;
a blade comprising an elongate plate with a bevelled scraping edge for being secured beneath the machinable layer on the bottom wall of the beam; and a fastening system arranged for securing the blade to the bottom wall of the beam.
According to a second aspect of the present invention there is provided a method of supporting an elongate blade having a bevelled scraping edge on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the method comprising:
providing a beam arranged to span a length of the blade;
supporting the beam horizontally on the ice scraping device to span in a lateral direction which is transverse to the forward working direction of the ice scraping equipment;
SUMMARY
According to one aspect of the present invention there is provided an ice scraper blade assembly for being supported on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the assembly comprising:
a beam arranged to be supported on the ice scraping device such that the beam is elongate in a lateral direction which is transverse to the forward working direction, the beam having a bottom wall extending in the lateral direction along a bottom side of the beam;
a layer of machinable material secured to the bottom wall of the.beam;
a blade comprising an elongate plate with a bevelled scraping edge for being secured beneath the machinable layer on the bottom wall of the beam; and a fastening system arranged for securing the blade to the bottom wall of the beam.
According to a second aspect of the present invention there is provided a method of supporting an elongate blade having a bevelled scraping edge on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the method comprising:
providing a beam arranged to span a length of the blade;
supporting the beam horizontally on the ice scraping device to span in a lateral direction which is transverse to the forward working direction of the ice scraping equipment;
-3-providing a layer of machinable material on a bottom wall of the beam;
machining the layer of machinable material to form a level bottom surface;
coupling the blade to the beam such that the blade is abutted against the level bottom surface of the layer of machinable material beneath the bottom wall of beam.
By providing a machinable layer along a bottom side of the supporting beam where the scraper blade is supported, a level surface can be machined for supporting the blade in a true level and straight configuration without warping the beam as the original formed shape of the beam remains fully intact during the machining to level and straighten the blade. When the extruded beam is not directly modified by machining, the thermal deformation of the beam is predictable and can be accommodated for when machining the level surface on the layer of machinable material. Accordingly a lower cost extruded beam can be used, thus avoiding the significantly larger cost of providing a cast beam, while still achieving a true straight and level mounting surface for the blade.
The layer may be formed of a material which is non-metallic and different than a material of the beam, for example a plastic material, or more particularly a phenolic material, which is bonded to the bottom wall of the beam along a length of the beam in the lateral direction. Preferably the layer comprises a sufficiently hard and rigid material that the material is arranged to retain shape subsequent to a machining operation for straightening and levelling purposes.
The layer of machinable material may be bonded by applying the material to the beam as an uncured liquid and arranging the liquid to harden or cure on the beam.
machining the layer of machinable material to form a level bottom surface;
coupling the blade to the beam such that the blade is abutted against the level bottom surface of the layer of machinable material beneath the bottom wall of beam.
By providing a machinable layer along a bottom side of the supporting beam where the scraper blade is supported, a level surface can be machined for supporting the blade in a true level and straight configuration without warping the beam as the original formed shape of the beam remains fully intact during the machining to level and straighten the blade. When the extruded beam is not directly modified by machining, the thermal deformation of the beam is predictable and can be accommodated for when machining the level surface on the layer of machinable material. Accordingly a lower cost extruded beam can be used, thus avoiding the significantly larger cost of providing a cast beam, while still achieving a true straight and level mounting surface for the blade.
The layer may be formed of a material which is non-metallic and different than a material of the beam, for example a plastic material, or more particularly a phenolic material, which is bonded to the bottom wall of the beam along a length of the beam in the lateral direction. Preferably the layer comprises a sufficiently hard and rigid material that the material is arranged to retain shape subsequent to a machining operation for straightening and levelling purposes.
The layer of machinable material may be bonded by applying the material to the beam as an uncured liquid and arranging the liquid to harden or cure on the beam.
-4-When the beam comprises an extruded hollow member of generally rectangular cross section comprising a top wall spaced above the bottom and two upright walls spanning up from the bottom wall to the top wall along opposing sides of the top and bottom walls along a length of the beam in the lateral direction, the layer of machinable material on the bottom wall preferably spans a width of the bottom wall between the two upright walls.
The blade can be secured to the bottom wall of the beam by threaded fasteners extending through the layer of machinable material.
Some embodiments of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of the ice scraper blade assembly.
Figure 2 is an end elevational view of the ice scraper blade assembly.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a blade assembly generally indicated by reference numeral 10. The blade assembly 10 is particularly suited for being supported on ice scraping equipment for cleaning and levelling ice in various sports for example. Though various embodiments are shown in the accompanying figures, the common features of each will first be described herein.
The blade assembly 10 includes a beam 12 for supporting the assembly on suitable support arms 14 of the ice scraping equipment. The beam 12 is arranged to be supported in a horizontal orientation which is elongate in a lateral direction extending between opposed ends of the beam. The beam is supported such that the
The blade can be secured to the bottom wall of the beam by threaded fasteners extending through the layer of machinable material.
Some embodiments of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of the ice scraper blade assembly.
Figure 2 is an end elevational view of the ice scraper blade assembly.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a blade assembly generally indicated by reference numeral 10. The blade assembly 10 is particularly suited for being supported on ice scraping equipment for cleaning and levelling ice in various sports for example. Though various embodiments are shown in the accompanying figures, the common features of each will first be described herein.
The blade assembly 10 includes a beam 12 for supporting the assembly on suitable support arms 14 of the ice scraping equipment. The beam 12 is arranged to be supported in a horizontal orientation which is elongate in a lateral direction extending between opposed ends of the beam. The beam is supported such that the
-5-lateral direction which the beam extends is oriented substantially perpendicularly to the forward working direction that the ice scraping equipment is supported for movement across a sheet of ice.
The beam 12 comprises an extruded hollow tube of rectangular cross section including a flat bottom wall 16 spanning a bottom side of the beam, an opposing flat top wall 18 spanning the top side of the beam, and two upright side walls 20 extending upwardly from opposing sides of the bottom wall 16 to span to the top wall 18 parallel and spaced apart from one another along a full length of the beam in the lateral direction. In the illustrated embodiment, the beam dimensions are approximately three inches in width between the two opposed side walls 20 and four inches in height between the bottom wall and top wall. When extruded of steel, a suitable thickness of the walls is approximately'/4 of an inch.
The bottom wall of the beam includes a layer 20 of machinable material thereon. The layer 22 is arranged to fully span the bottom surface of the bottom wall 16 along the full length thereof and substantially across a whole width thereof between the two side walls. The layer 22 in the illustrated embodiment comprises a plastic material which is sufficiently hard and rigid that the material rigidly holds its shape with a flat level bottom surface subsequent to a machining operation being performed thereon by suitable milling equipment for example. The material remains rigid through a range of temperatures close to the freezing point of water. A
suitable thickness of the layer is 1/4 of an inch so as to be substantially identical to the thickness of the walls of the beam. The layer 22 has a width in the order of 2.75 inches between the two walls along the full length of the beam to substantially span the full bottom side of the bottom wall.
The beam 12 comprises an extruded hollow tube of rectangular cross section including a flat bottom wall 16 spanning a bottom side of the beam, an opposing flat top wall 18 spanning the top side of the beam, and two upright side walls 20 extending upwardly from opposing sides of the bottom wall 16 to span to the top wall 18 parallel and spaced apart from one another along a full length of the beam in the lateral direction. In the illustrated embodiment, the beam dimensions are approximately three inches in width between the two opposed side walls 20 and four inches in height between the bottom wall and top wall. When extruded of steel, a suitable thickness of the walls is approximately'/4 of an inch.
The bottom wall of the beam includes a layer 20 of machinable material thereon. The layer 22 is arranged to fully span the bottom surface of the bottom wall 16 along the full length thereof and substantially across a whole width thereof between the two side walls. The layer 22 in the illustrated embodiment comprises a plastic material which is sufficiently hard and rigid that the material rigidly holds its shape with a flat level bottom surface subsequent to a machining operation being performed thereon by suitable milling equipment for example. The material remains rigid through a range of temperatures close to the freezing point of water. A
suitable thickness of the layer is 1/4 of an inch so as to be substantially identical to the thickness of the walls of the beam. The layer 22 has a width in the order of 2.75 inches between the two walls along the full length of the beam to substantially span the full bottom side of the bottom wall.
-6-The plastic material forming the layer 22 of machinable material, typically a phenolic material, may be applied as a liquid in an uncured or flowable state with the aid of a mold which holds the material in place until it is cured or hardens so that that material becomes bonded to the steel beam by the solidifying or curing process. Alternatively, the material forming the layer 22 can be bonded to the beam by various known techniques.
A suitable scraper blade 24 is secured to the flat bottom side of the layer 22 of machinable material. The blade 24 comprises a rigid plate of hardened steel which is elongate to span a full length of the beam while being somewhat wider than the beam in the forward direction extending between the side walls 20. The blade 24 includes two opposed side edges 26 which span the length of the blade in the elongate direction of the beam. Each of the side edges comprises a bevelled scraper edge which slopes downwardly and outwardly from a top side to a bottom side of the plate along the full length thereof.
The blade 24 includes a plurality of mounting apertures 28 extending therethrough between top and bottom sides at a central location between the two opposed side edges 26 at spaced apart positions along the length of the blade.
The mounting apertures 28 each include a suitable counter bore 30 at the bottom side of the blade to permit a head of threaded bolts 32 for fastening the blade 24 to the beam to be recessed upwardly into the blade relative to the. bottom side of the blade. The threaded bolts 32 extend through cooperating apertures 34 in the bottom wall16 of the beam and through the layer 22 so that the bolts can secure the blade 24 directly to the beam with the layer 22 of machinable material clamped therebetween. A
suitable nut 36 is secured to the inner end of the bolt within the hollow interior of the beam.
A suitable scraper blade 24 is secured to the flat bottom side of the layer 22 of machinable material. The blade 24 comprises a rigid plate of hardened steel which is elongate to span a full length of the beam while being somewhat wider than the beam in the forward direction extending between the side walls 20. The blade 24 includes two opposed side edges 26 which span the length of the blade in the elongate direction of the beam. Each of the side edges comprises a bevelled scraper edge which slopes downwardly and outwardly from a top side to a bottom side of the plate along the full length thereof.
The blade 24 includes a plurality of mounting apertures 28 extending therethrough between top and bottom sides at a central location between the two opposed side edges 26 at spaced apart positions along the length of the blade.
The mounting apertures 28 each include a suitable counter bore 30 at the bottom side of the blade to permit a head of threaded bolts 32 for fastening the blade 24 to the beam to be recessed upwardly into the blade relative to the. bottom side of the blade. The threaded bolts 32 extend through cooperating apertures 34 in the bottom wall16 of the beam and through the layer 22 so that the bolts can secure the blade 24 directly to the beam with the layer 22 of machinable material clamped therebetween. A
suitable nut 36 is secured to the inner end of the bolt within the hollow interior of the beam.
-7-To support the blade in a straight and level orientation on the beam of the blade assembly, the bottom surface of the layer 22 of machinable material is machined to form a machined level surface which is straight along a length of the beam against which the blade 24 can be clamped in use.
A CNC milling machine is used to machine a level and straight bottom surface on the layer 22 of machinable material against which the blade 24 is bolted.
In further embodiments, any hard material which permits a sufficient thickness to be applied to allow some removal of material for straightening and which retains a level surface when machined by milling is suitable. Typical materials are non-metal so as to be softer than the material of the beam, for example various hard plastics, resins or industrial coatings may be considered. Preferred materials can be bonded directly to the beam, however any material which can be bonded by use of additional adhesive or fastening techniques may be considered.
While some embodiments of the present invention have been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. It is to be understood that the invention is applicable to manual or power operated scrapers and ice scraping equipment, including those for sheets of ice for curling and the like activities and those for larger skating rinks for recreational and figure skating and ice sports, for example hockey. Since these various applications may involve the use of a variety of scraper devices requiring differing embodiments of the invention, the invention is to be considered limited solely by the scope of the appended claims.
A CNC milling machine is used to machine a level and straight bottom surface on the layer 22 of machinable material against which the blade 24 is bolted.
In further embodiments, any hard material which permits a sufficient thickness to be applied to allow some removal of material for straightening and which retains a level surface when machined by milling is suitable. Typical materials are non-metal so as to be softer than the material of the beam, for example various hard plastics, resins or industrial coatings may be considered. Preferred materials can be bonded directly to the beam, however any material which can be bonded by use of additional adhesive or fastening techniques may be considered.
While some embodiments of the present invention have been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. It is to be understood that the invention is applicable to manual or power operated scrapers and ice scraping equipment, including those for sheets of ice for curling and the like activities and those for larger skating rinks for recreational and figure skating and ice sports, for example hockey. Since these various applications may involve the use of a variety of scraper devices requiring differing embodiments of the invention, the invention is to be considered limited solely by the scope of the appended claims.
Claims (21)
CLAIMED ARE DEFINED AS FOLLOWS:
1. An ice scraper blade assembly for being supported on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the assembly comprising:
a beam arranged to be supported on the ice scraping device such that the beam is elongate in a lateral direction which is transverse to the forward working direction, the beam having a bottom wall extending in the lateral direction along a bottom side of the beam;
a machinable layer of machinable, non-metallic material secured to the bottom wall of the beam;
a blade comprising an elongate plate with a bevelled scraping edge for being secured beneath the machinable layer on the bottom wall of the beam; and a fastening system arranged for securing the blade to the bottom wall of the beam.
a beam arranged to be supported on the ice scraping device such that the beam is elongate in a lateral direction which is transverse to the forward working direction, the beam having a bottom wall extending in the lateral direction along a bottom side of the beam;
a machinable layer of machinable, non-metallic material secured to the bottom wall of the beam;
a blade comprising an elongate plate with a bevelled scraping edge for being secured beneath the machinable layer on the bottom wall of the beam; and a fastening system arranged for securing the blade to the bottom wall of the beam.
2. The blade assembly according to Claim 1 wherein the machinable layer comprises material which is different than a material of the beam.
3. The blade assembly according to either one of Claims 1 or 2 wherein the material of the machinable layer comprises a rigid, plastic material.
4. The blade assembly according to either one of Claims 1 or 2 wherein the material of the machinable layer comprises a phenolic material.
5. The blade assembly according to any one of Claims 1 through 4 wherein the material of the machinable layer is a rigid material arranged to retain shape subsequent to a machining operation.
6. The blade assembly according to any one of Claims 1 through 5 wherein the machinable layer is bonded to the bottom wall of the beam along a length of the beam in the lateral direction.
7. The blade assembly according to any one of Claims 1 through 6 wherein the beam comprises a hollow member of generally rectangular cross section comprising a top wall spaced above the bottom and two upright walls spanning up from the bottom wall to the top wall along opposing sides of the top and bottom walls along a length of the beam in the lateral direction.
8. The blade assembly according to Claim 7 wherein the machinable layer spans a width of the bottom wall between the two upright walls.
9. The blade assembly according to any one of Claims 1 through 8 wherein the beam comprises an extruded member.
10. The blade assembly according to any one of Claims 1 through 9 wherein the blade is secured to the bottom wall of the beam by threaded fasteners extending through the machinable layer between the blade and the beam.
11. A method of supporting an elongate blade having a bevelled scraping edge on an ice scraping device arranged for movement in a forward working direction across a sheet of ice, the method comprising:
providing a beam arranged to span a length of the blade;
supporting the beam horizontally on the ice scraping device to span in a lateral direction which is transverse to the forward working direction of the ice scraping equipment;
providing a machinable layer of machinable, non-metallic material on a bottom wall of the beam;
machining the layer of machinable material to form a level bottom surface;
coupling the blade to the beam such that the blade is abutted against the level bottom surface of the layer of machinable material beneath the bottom wall of beam.
providing a beam arranged to span a length of the blade;
supporting the beam horizontally on the ice scraping device to span in a lateral direction which is transverse to the forward working direction of the ice scraping equipment;
providing a machinable layer of machinable, non-metallic material on a bottom wall of the beam;
machining the layer of machinable material to form a level bottom surface;
coupling the blade to the beam such that the blade is abutted against the level bottom surface of the layer of machinable material beneath the bottom wall of beam.
12. The method according to Claim 11 including forming the layer of a material which is different than a material of the beam.
13. The method according to either one of Claims 11 or 12 including forming the machinable layer of a plastic material.
14. The method according to either one of Claims 11 or 12 including forming the machinable layer of a phenolic material.
15. The method according to any one of Claims 11 through 14 including forming the machinable layer of a material which is arranged to retain a rigid shape subsequent to a machining operation.
16. The method according to any one of Claims 11 through 15 including bonding the machinable layer to the bottom wall of the beam along a length of the beam in the lateral direction.
17. The method according to Claim 16 including bonding the machinable layer by applying the material of the machinable layer to the beam as a liquid and arranging the liquid to harden on the beam.
18. The method according to any one of Claims 11 through 17 including forming the beam to comprise a hollow member of generally rectangular cross section comprising a top wall spaced above the bottom and two upright walls spanning up from the bottom wall to the top wall along opposing sides of the top and bottom walls along a length of the beam in the lateral direction.
19. The method according to Claim 18 including providing the machinable layer on the bottom wall such that the machinable layer spans a width of the bottom wall between the two upright walls.
20. The method according to any one of Claims 11 through 19 including forming the beam by extrusion.
21. The method according to any one of Claims 11 through 20 including securing the blade to the bottom wall of the beam by threaded fasteners extending through the machinable layer between the blade and the beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2643560A CA2643560C (en) | 2008-10-31 | 2008-10-31 | Ice scraper blade assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2643560A CA2643560C (en) | 2008-10-31 | 2008-10-31 | Ice scraper blade assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2643560A1 CA2643560A1 (en) | 2010-04-30 |
| CA2643560C true CA2643560C (en) | 2016-01-05 |
Family
ID=42126241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2643560A Active CA2643560C (en) | 2008-10-31 | 2008-10-31 | Ice scraper blade assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2643560C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011052544A1 (en) * | 2011-08-10 | 2013-02-14 | Michael Hoffmann | Device for replacing a planing blade attached to a cutter bar of an ice-working machine |
-
2008
- 2008-10-31 CA CA2643560A patent/CA2643560C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2643560A1 (en) | 2010-04-30 |
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