Patent Grant
7866673
The present invention relates to an ice skate blade which includes a heating and control system for applying heat to the blade.
This application is related to an application filed ion the same date as the present application by the same applicants and assigned to the present assignee under Ser. No. 11/780,577 and entitled MOUNTING ARRANGEMENT FOR ICE SKATE BLADES.
Common ice skates used in skating have an elongate blade which is arranged to slide along the ice surface. Attempts to minimise the friction between the blade and the ice using heat are shown a number of US patents. The blade when of the heated type also must be mounted in an effective manner which takes into account the provision of the heating and control circuits which become part of the system. A number of prior patents show mounting systems.
U.S. Pat. No. 3,119,921 (Czaja) issued Nov. 2, 1962 discloses a resistant heating element attached along a top of the blade on a skate with a battery mounted in the open area above the blade underneath the connection of the blade to the boot.
U.S. Pat. No. 3,866,927 (Tvengsberg) issued Feb. 18, 1975 discloses a similar arrangement.
U.S. Pat. No. 5,441,305 (Tabar) issued Aug. 15, 1995 discloses a heating system primarily for skis which appears to be speculative in nature and includes a number of different arrangements which could be used.
U.S. Pat. Nos. 6,669,209 issued Dec. 30, 2003, 6,817,618 issued Nov. 16, 2004 and 6,988,735 issued Jan. 24, 2006 all by Furzer an all assigned to the present assignee disclose various arrangements of heated skate blade.
U.S. Pat. No. 5,088,749 (Olivieri) issued Feb. 18, 1992 discloses a skate blade mounting system where a metal blade has hook portions along its top edge which are pulled tight onto the molded plastic base by a screw and lever arrangement.
U.S. Pat. No. 5,248,156 (Cann) issued Sep. 28, 1993 discloses a skate blade with a replaceable runner which is hooked at the font end and fastened by a screw at the rear.
U.S. Pat. No. 5,769,434 (Wurthner) issued Jul. 23, 1998 discloses a skate blade formed of a plastics material with a metal runner.
U.S. Pat. No. 6,523,835 (Lyden) issued Feb. 25, 2003 discloses a skate blade system where the blade can be manufactured from various composites and can be mounted using a hinging system.
US Published Application 2005/0029755 (Fask) published Feb. 10, 2005 discloses a skate blade including an injection molded steel runner which is screw fastened onto a plastic holder.
It is an object of the present invention to provide an ice skate assembly for attachment to a boot which includes a heating arrangement.
According to a first aspect of the present invention there is provided a combination of a skate blade member and support therefor for attachment to a skate boot, comprising:
a skate blade member;
a support for the skate blade member having a bottom slot member defining a downwardly facing slot for receiving the blade member in fixed position along the slot, a front hollow tower member and a rear hollow tower member each extending upwardly from the bottom slot member to a top portion for attachment to the skate boot;
at least one heating element for applying heat to the blade;
a battery power source for supplying power to said at least one heating element;
the battery power source being mounted in one of the front and rear hollow tower members;
and at least said one of the front and rear hollow tower members being between the bottom slot member and the top portion closed and free from perforations to prevent penetration of moisture to the battery power source.
Preferably the battery power source includes within said one of the front and rear hollow members a proximity switch operable by bringing a finger to an exterior surface adjacent the proximity switch.
Preferably the battery power source includes two proximity switches at spaced positions to require simultaneous actuation at the two different positions to prevent unintentional operation.
Preferably the battery power source includes an LED mounted on the support, possibly in the inside of said one of the front and rear hollow members or in the slot member, at a location thereon where the plastics material forming said one is sufficiently thin to observe the LED through the material.
Preferably the battery power source includes a battery and a battery control circuit which are connected by an encapsulating material.
Preferably the encapsulating material is an over-molding having positive and negative terminals for the battery power source exposed at an outside location on the over-molding.
Preferably at least one heating element comprises a heating strip along a top edge of the blade member.
Preferably the blade member includes an over-molding of a plastics material along sides thereof and wherein the heating strip is located above the over-molding.
Preferably the heating strip is formed of a plurality of transistors at spaced positions along the blade.
Preferably each transistor is connected to the blade by a piece of an electrically and thermally conductive adhesive tape.
Preferably the heating strip extends across the space between the hollow tower members so that part of the heating strip is under each tower member.
Preferably at least one heating element includes a heating control circuit attached along the blade.
Preferably the heating element and the heating control circuit are over-molded by an encapsulating material.
Preferably there is provided a connection at the blade between terminals of the heating control circuit and terminals of the battery control circuit.
Preferably the blade is removable.
According to a second aspect of the present invention there is provided a combination of a skate blade member and support therefor for attachment to a skate boot, comprising:
a skate blade member;
a support for the skate blade member having a bottom slot member defining a downwardly facing slot for receiving the blade member in fixed position along the slot, a front hollow tower member and a rear hollow tower member each extending upwardly from the bottom slot member to a top portion for attachment to the skate boot;
at least one heating element for applying heat to the blade;
a battery power source for supplying power to said at least one heating element;
the battery power source being mounted in one of the front and rear hollow tower members;
wherein the battery power source includes two proximity switches at spaced positions to require simultaneous actuation at the two different positions to prevent unintentional operation.
According to a third aspect of the present invention there is provided a combination of a skate blade member and support therefor for attachment to a skate boot, comprising:
a skate blade member;
a support for the skate blade member having a bottom slot member defining a downwardly facing slot for receiving the blade member in fixed position along the slot, a front hollow tower member and a rear hollow tower member each extending upwardly from the bottom slot member to a top portion for attachment to the skate boot;
at least one heating element for applying heat to the blade;
a battery power source for supplying power to said at least one heating element;
the battery power source being mounted in one of the front and rear hollow tower members;
wherein the battery power source includes a battery and a battery control circuit which are connected by an encapsulating material;
and wherein the encapsulating material is an over-molding having positive and negative terminals for the battery power source exposed at an outside location on the over-molding.
According to a fourth aspect of the present invention there is provided a combination of a skate blade member and support therefor for attachment to a skate boot, comprising:
a skate blade member;
a support for the skate blade member having a bottom slot member defining a downwardly facing slot for receiving the blade member in fixed position along the slot, a front hollow tower member and a rear hollow tower member each extending upwardly from the bottom slot member to a top portion for attachment to the skate boot;
at least one heating element for applying heat to the blade;
a battery power source for supplying power to said at least one heating element;
the battery power source being mounted in one of the front and rear hollow tower members;
wherein at least one heating element comprises a heating strip along a top edge of the blade member.
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Referring to the accompanying drawings
The skate blade assembly 1 is generally fastened through the sole plate flange holes 7 through matching holes in the sole of an ice skate boot (not shown) with mechanical fasteners (not shown). The heel 4 and the toe 5 of the skate blade holder 3 generally are hollow.
A heating arrangement 8 is arranged to heat the skate blade 2 such that the heat reduces the coefficient of friction of the blade 2 on an ice surface. The heating arrangement 8 has a heat control circuit board 9 mounted on the top edge of the blade and a battery 14 and battery control circuit board 14A in the hollow heel tower 4 of the holder 3.
A number of different possibilities for generating heat for the blade can be used. In one option, the heating system uses a series of transistors 12A, 12B, 12C and 12D best shown in
By taking the transistors 12 into the linear region of operation, a high efficiency heat source is produced. The power source is a rechargeable battery 14 and is regulated for circuit operation and used to supply the transistors 12, which are preferably a field effect transistor (FET) or a power MOS-FET. However conventional bipolar junction type transistor can also be used.
The holder 3 defines an elongate bottom section 15 which extends along the full length of the holder and defines along a center thereof a slot 16 for receiving the blade. The elongate member 15 is connected to the hollow towers 4 and 5 so that the towers converge downwardly and inwardly from the top flange 6, 6A toward the bottom elongate member 15. At the bottom member 151 the moulded body forming the holder is solid and this solid structure extends upwardly into the structure of the holder until the width expands sufficiently to allow the structure to be formed into the hollow towers 4 and 5 while providing sufficient strength within the holder body from the moulded plastics material.
Between the hollow towers, the holder includes a U-shaped area 17 defining a top edge 18 which is the top edge of the solid part of the body on which the bottom member 15 is formed. The top surface 18 curves upwardly at the forward end to form a wall 18A which is the rear wall of the front tower 5. Similarly the top 18 at its rear curves upwardly to form a upward and forwardly extending portion 18B which forms the front wall of the rear tower 4. The front tower 5 thus has a rear end at the rear end of the flange 6 which overlies the surface 18 and symmetrically a forward end of the flange 6A of the tower 4 also overlies the surface 18.
The front tower 5 has a front wall 21 which extends downwardly to a forward end 22 of the member 15. The rear tower 4 has a rear wall 23 which extends downwardly to a rear end 24 of the member 15. The wall extending upwardly from the member 15 to the base of the towers includes side ribs 25 which extend upwardly and rearwardly as indicated at 25 and 25A together with downwardly extending ribs 26 which connect from the inclined ribs 25 and 25A to the bottom end 15 to provide an attractive appearance.
As best shown in the cross sectional views 6 through 10, the member 15 defines a slot 16 in its bottom surface with the slot 16 extending upwardly to an upper end 27 and defining two side walls 28 and 29 of the slot. The slot extends only partly across the width of the member 15 so that two shoulders 30 and 31 are formed at the bottom of the member 15 on either side of the slot 16. This slot provides a receptacle for the blade so that the blade may be inserted into this slot and pulled up into the slot to be held in fixed position on the bottom of the member 15 and held against side to side movement by engagement between the blade and the slot.
The blade 2 includes a steel blade portion 32 and an over-molded portion 33 of a plastics material. The over-moulded portion is moulded onto the sides of the steel blade 32 and across the top edge of the steel blade 32 so as to form a structural member rigidly and permanently attached to the steel blade and extending out to each side of the steel blade. Thus as shown for example in
As best shown in
The complex upper edge 40 of the steel blade portion is shaped to define a series of hooks which engage into the over-molded plastics portion 33 to maintain permanent engagement therewith. Thus there is a front hook 42 at the forwardmost end of the steel blade and this is received just behind the front edge 43 of the over-molded plastics piece so that it is embedded in the plastics piece and acts to retain the blade within that plastics piece. Similarly there is a rear hook 44 which engages into the plastics piece just in front of the rear edge 45 of the over-molded plastics piece.
The steel blade further includes upwardly projecting elements 46, 47, 48 and 49 in the center section under the surface 18 which project into the area at the transistors 12A, 12B, 12C and 12D respectively to which they are attached. Some of these upwardly projecting members such as the members 47 and 48 have upper hooks which extend forwardly and rearwardly respectively for engaging into the plastics material to provide further engagement therewith. Further upwardly projecting portions 50 at spaced positions along the length of the blade also provide further engagement into the plastics material. The thermistor 12 is mounted on a central one of the projecting elements 12A.
Thus at some locations as shown in
Thus as best shown in
The rearward pulling action on the blade is provided by a rear mounting member 58 of the blade. The rear mounting member 58 also projects upwardly through the over-molded plastics member 33 to provide an upwardly extending portion above that member. The rear mounting 58 includes two arms 59 and 60 between which is mounted a nut 61 received in a cylindrical bearing surface 62 allowing the nut to swivel about an axis at right angles to the axis of the nut. Thus the nut has a cylindrical outer surface which is contained within the cylindrical bearing surface 62 allowing this pivotal action to accommodate slight inaccuracies in the positioning of the blade relative to the holder. The rear wall 23 of the rear tower 4 has a recesses hole 63 for receiving a screw 64. The screw has a head which engages against a base of the recessed hole so that the screw can engage into the nut and by turning the screw the nut is pulled upwardly and rearwardly as the screw head butts against the shoulders on either side of the hole. Thus the turning of the screw 64 acts to pull the blade upwardly and rearwardly along the slot 16 so as to pull the rear part of the blade into the slot and so as to pull the blade rearwardly along the slot to force the front mounting portion 55 into the receptacle 56.
Thus the blade can be mounted on the holder by releasing the screw and by removing the projecting portion of the moulded plastics portion 33 from the slot by pulling the blade downwardly. The blade can be reinserted by simply inserting the blade approximately into its required position thus sliding the front member 55 into the receptacle 56 whereupon the screw and be inserted into the nut and the blade pulled up into place both longitudinally and upwardly.
As shown for example in
As best shown in
As best shown in
Turning now to
The tower 5 at the front is of reduced height relative to the tower 4 at the rear. Thus as is conventional the heel part of the boot is elevated above the toe part of the boot allowing the top flanges 6 and 6A to be attached directly to the bottom surface of the boot without the presence of a heel structure underneath the boot between the rear part of the boot and the top flange 6A.
The flange 6 surrounding the tower 5 is shaped so as to follow approximately the shape of the sole part of the boot and thus is slightly wider than the heel part of the boot at the flange 6A of the tower 4.
Each of the flanges includes a series of holes along the flanges on each side of the hollow tower and these holes are arranged to be fastened to the boot by rivets engaged through the flange from the underside and engaging into the receiving holes in the base of the boot.
Thus the sole has four receiving holes along each side for receiving the four holes of the flange 6. The rear part of the boot has three receiving holes on each side for receiving the rivets from the flange 6A.
The holes 7 in the front tower include some oblong holes or elongate holes 7A on the front flange 6 which are elongated in a direction side to side which are the third ones from the front of the tower 5. The holes 7 in the rear tower 4 include some oblong holes or elongate holes 7B on the rear flange 6A which are elongated in a direction front to rear direction which are the middle ones of tower 4). This allows adjustment of the position of the flange on the base of the boot so as to allow slight side to side and front to rear movement of the mount for the skate blade relative to the boot for improved alignment and ease of installation.
As best shown in
The battery power supply 14 includes a battery 71 and a battery control circuit board 72 located underneath the battery. A conventional battery protection circuit 14A is part of the battery since the batteries are sold with this little circuit incorporated in the battery enclosure. The battery control circuit 72 carries the components for controlling the supply of power from the battery including a low power indicator. The battery 71 and the circuit board 72 are contained within an encapsulating material as an enclosed separate item which can be inserted into the hollow tower as an integral element to be contained therein. The encapsulated battery power supply includes a pair of terminals 74 and 75 which are arranged to be connected to the blade for communication of current from the battery power supply 6 to the heat control circuit carried on the blade.
As previously described, the blade itself can be removed from the mounting and thus the terminal 74 and 75 comprise terminals of the spring-finger type which engage onto fixed terminals on the blade simply by pressing the blade into the gap between the spring fingers of the terminal 74 and 75. Thus simple upward pressure of the blade onto the spring fingers at the required location causes the engagement between the terminals 74 and 75 and the requisite terminal on the blade. The battery power supply further includes a further terminal 76 in the form of a spring finger which extends from one end of the battery control circuit board for engagement with a stud or rivet 77 carried in the tower as best shown in
A charging system for the skate can therefore comprise components which have a first terminal for engagement with the blade 32 and a second terminal for engagement with the head 78 of the stud 77. This provides a connection to the batter power supply through the battery control circuit 72. As explained hereinafter, the transistors are connected to the metal blade so that current can flow from the metal blade 32 through the circuit of the heating control circuit board 70 to the terminal 75 and from the terminal 75 into the battery control circuit board 72 then to the battery 14 through a wire. The opposite connection of the charging power supply provides a connection through the stud 77 and the spring terminal 76 into the battery control circuit board 72 then to the battery 14 through a wire to provide the charging action.
The encapsulated circuit board 70 is thus contained within the slot 16 above the shoulders 37 and 38. The control circuit 70 is also contained below the wall 18 of the support so that it is fully enclosed both by its own encapsulation and by the surrounding structure of the support.
The battery power supply 14 is contained within the rear tower 4 above the elongate member 15 of the support and within the enclosed tower 4. The flange 6A is sealed to the underside of the skate boot with the battery power supply 14 in place. The sealing action can be provided by a gasket which overlies the flange 6A to provide an effective sealing action to prevent the penetration of moisture from the ice or from the environment into the rear tower 4 and thus into the area of the battery power supply. The rear tower 4 is fully enclosed and sealed without any openings for switches or connections since the tapered shoulder 33 seals with the base of the bottom support 15 when the screw 64 is tightened, apart from the stud 77 which is itself sealed into a hole in the rear wall 23 of the tower 4.
In order to avoid unnecessary openings into the hollow rear tower 4, the manually operable switch arrangement for activating the power supply is defined by a pair of proximity switches 79 and 80 mounted on the inside surface of the hollow rear tower 4 at sides of the tower at a position where the fingers and thumb of a user can reach around the rear wall 23 to squeeze together on respective side of the hollow rear tower to engage the areas of the tower at the proximity switches 79 and 80. The use of two proximity switches one on each side prevents inadvertent operation of the switch actuating the power supply by contact with an extraneous item such as a puck or other elements such as an opponent's stick. Thus the actuation of the switch occurs only in the event that both proximity switches are activated simultaneously and are touched in a particular predetermined pattern This the microprocessor may be programmed that the sensors must be touched for a predetermined minimum period of time or in a pattern like a computer mouse double click, that is they may be touched for at least predetermined minimum period of time but not more than a predetermined maximum period of time then released for at least predetermined minimum period of time but not more than a predetermined maximum period of time and then touched for at least a predetermined period of time which is an extremely unlikely event unless controlled by the user reaching to the proximity switches by a finger and thumb.
The use of the proximity switches avoids the penetration of the tower 4 so that there is no possibility for moisture penetration through openings at the switches. Proximity switches are commonly available and utilize the electrical changes effected by bringing the finger or thumb into close proximity with the electrical component on the inside surface.
An indicator light or LED for indicating the activation of the power supply is visible on the exterior of the tower 4 and is provided at the location 81 visible on both sides of the blade indicated on
Turning now to
While the application of heat from the battery power supply to the top edge of the blade is preferably provided by the use of the transistors as previously described and as described in the prior patents of the present Assignees, alternative techniques for generating and applying the heat to the top edge of the blade can be used including commercially available resistant heating systems. In all cases the heating system is preferably contained or encapsulated within the over-molding material applied onto the top edge of the blade to provide the mounting as previously described. The heating system is thus protected by the over-molding plastics material and by the insertion of the heating system into the slot within the base of the support so that it is also therefore contained within that slot and protected from engagement with materials outside of the slot.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2692326 | Crowell | Oct 1954 | A |
| 3119921 | Czaja | Jan 1964 | A |
| 3866927 | Tvengsberg | Feb 1975 | A |
| 3906185 | Gross et al. | Sep 1975 | A |
| 3913312 | Numabe | Oct 1975 | A |
| 3936755 | Sheng | Feb 1976 | A |
| 4761420 | Genain | Aug 1988 | A |
| 5088749 | Olivieri | Feb 1992 | A |
| 5248156 | Cann | Sep 1993 | A |
| 5441305 | Tabar | Aug 1995 | A |
| 5769434 | Wurthner | Jun 1998 | A |
| 6485033 | Nicoletti | Nov 2002 | B2 |
| 6523835 | Lyden | Feb 2003 | B1 |
| 6669209 | Furzer | Dec 2003 | B2 |
| 6817618 | Furzer | Nov 2004 | B2 |
| 6894893 | Hidesawa | May 2005 | B2 |
| 6988735 | Furzer | Jan 2006 | B2 |
| 20030107192 | Furzer et al. | Jun 2003 | A1 |
| 20050029247 | Furzer et al. | Feb 2005 | A1 |
| 20050029755 | Fask | Feb 2005 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20090020967 A1 | Jan 2009 | US |
