U.S. patent application number 09/998933 was filed with the patent office on 2003-06-05 for blade portion for a hockey stick.
Invention is credited to Caron, Daniel.
Application Number | 20030104883 09/998933 |
Document ID | / |
Family ID | 25545674 |
Filed Date | 2003-06-05 |
United States Patent
Application |
20030104883 |
Kind Code |
A1 |
Caron, Daniel |
June 5, 2003 |
Blade portion for a hockey stick
Abstract
A blade portion for a hockey stick comprising a wooden shank
portion, a blade element made of synthetic material and a ground
contacting portion comprising a first segment formed of the lower
edge of the wooden shank portion and a second segment formed of the
lower edge of the blade element extending from the front side of
the wooden shank portion to the distal end of the blade
element.
Inventors: |
Caron, Daniel; (Cowansville,
CA) |
Correspondence
Address: |
FISH & RICHARDSON P.C.
1425 K STREET, N.W.
11TH FLOOR
WASHINGTON
DC
20005-3500
US
|
Family ID: |
25545674 |
Appl. No.: |
09/998933 |
Filed: |
December 3, 2001 |
Current U.S.
Class: |
473/560 |
Current CPC
Class: |
A63B 2209/02 20130101;
A63B 2102/24 20151001; A63B 2102/22 20151001; A63B 59/70
20151001 |
Class at
Publication: |
473/560 |
International
Class: |
A63B 059/12 |
Claims
The embodiments of the invention for which an exclusive privilege
or property is claimed are defined as follows:
1 A blade portion for a hockey stick, comprising: (a) a wooden
shank portion having: (i) a longitudinal axis; (ii) inner and outer
sides extending along said longitudinal axis; (iii) rear and front
sides between said inner and outer sides; (iv) a groove on said
front side, said groove extending along said longitudinal axis; and
(v) a lower edge extending from said rear side to said front side;
(b) a blade element made of synthetic material, said blade element
including; (i) a proximal end portion, said proximal end portion
having a tongue received in said groove; (ii) a distal end portion
remote from said proximal end portion; and (iii) a lower edge
extending from said front side to said distal end portion, the
lower edge of said wooden shank portion being a first lower edge,
the lower edge of said blade element being a second lower edge; and
(c) a ground contacting portion extending from said rear side to
said distal end portion, said ground contacting portion comprising
a first segment formed of said first lower edge and a second
segment formed of said second lower edge.
2. A blade portion as defined in claim 1, wherein said ground
contacting portion includes a protective layer on said first and
second lower edge.
3. A blade portion as defined in claims 1 or 2, wherein said blade
element comprises inner and outer surfaces extending from said
front side to said distal end portion.
4. A blade portion as defined in claim 3, said inner and outer
surfaces are continuous with said inner and outer sides
respectively for defining respective inner and outer puck engaging
portions.
5. A blade portion as defined in claim 4, said blade portion
comprising an inner layer recovering said inner puck engaging
portion and an outer layer recovering said outer puck engaging
portion.
6. A blade portion as defined in claim 5, wherein said inner and
outer layers are made of a material having higher rigidity than
said blade element.
7. A blade portion as defined in claim 6, wherein said inner layer
is thicker than said outer layer.
8. A blade portion as defined in claim 7, wherein said inner and
outer layers are first inner and outer layers, said blade portion
further comprising second inner and outer layers recovering said
first inner and outer layers respectively.
9. A blade portion as defined in claim 8, wherein said blade
element is made of foam.
10. A blade portion as defined in claim 9, wherein said foam
comprises glass fibers.
11. A blade portion as defined in claim 10, wherein said first
inner and outer layers include material selected from the group
consisting of wood, glass fibers, carbon fibers, kevlar, aluminum,
graphite and aramid.
12. A blade portion as defined in claim 11, wherein said second
inner and outer layers are made of woven materials.
13. A blade portion as defined in claim 12, wherein said woven
materials is selected from the group consisting of glass fibers,
carbon fibers, graphite, carbon fibers, quartz fibers and a mixture
of carbon fibers, of quartz fibers and of polyethylene fibers.
14. A blade portion as defined in claims 1 or 2, wherein said shank
comprises a tenon adapted to be inserted into a hollow hockey stick
shaft.
15. A blade portion as defined in claims 1 or 2, wherein said shank
is integrally formed with a wooden hockey stick shaft.
16. A method of manufacturing a blade portion for a hockey stick
comprising: (a) shaping a groove in a wooden shank portion; (b)
making a blade element made of a synthetic material; (c) shaping a
tongue in said blade element; (d) affixing said blade element to
said wooden shank portion by inserting said tongue in said groove;
and (e) recovering a portion of inner and outer sides of said
wooden shank portion and inner and outer surfaces of said blade
element with respective inner and outer layers including material
selected from the group consisting of wood, glass fibers, carbon
fibers, kevlar, aluminum, graphite and aramid.
17. The method of claim 16 further comprising molding said blade
portion.
18. The method of claim 17 further comprising trimming said blade
portion.
19. A hockey stick comprising a blade portion as defined in claims
1 or 2.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a blade portion for a
hockey stick comprising a wooden shank portion and a blade element
made of synthetic material.
BACKGROUND OF THE INVENTION
[0002] Typical hockey stick blades or replacement blades are
generally made of a wooden core reinforced with one or more layers
of synthetic material such as fiberglass, carbon fiber or graphite
and the likes. The core of the blade may also be made of a plastic
material reinforced with layers of synthetic fiber material. The
reinforcement layer is usually a woven filament layer, typically
soaked in a resin and glued to the surfaces of the blade.
[0003] The conventional manufacturing process for a wooden hockey
blade involves a large number of operations such as cutting,
planing, sanding, laminating, bonding and finishing of the various
wood pieces included in the blade. The blade may also be recovering
with glass fibers or other composite reinforcement layers or
braided glass socks. Curvature of the blade is obtained manually.
Since the mechanical properties of the blade may change from one
blade to another, even for the same type of wood, and since the
curvature is obtained through a manual operation, it is almost
impossible to manufacture wooden hockey blades for which the
mechanical properties and the curvature are constant from one blade
to another. With the composite hockey blade, it is however possible
to manufacture hockey blades having specific mechanical properties
and a specific curvature. One disadvantage of the composite hockey
blade is that it does not offer a feeling similar to a wooden
hockey blade. Indeed, it is recognized that a wooden hockey blade
offers a better feeling that a composite hockey blade since the
feel of the ground (or ice) and the ball (or puck) is better
dispersed in the wood.
[0004] Hence, there is a demand for an improved hockey stick blade
that offers the feeling of a wooden blade while allowing having
specific mechanical properties and a specific curvature.
SUMMARY OF THE INVENTION
[0005] As embodied and broadly described herein, the invention
provides a blade portion for a hockey stick, comprising a wooden
shank portion, a blade element made of synthetic material and a
ground contacting portion. The wooden shank portion has (i) a
longitudinal axis; (ii) inner and outer sides extending along said
longitudinal axis; (iii) rear and front sides between said inner
and outer sides; (iv) a groove on said front side, the groove
extending along the longitudinal axis; and (v) a lower edge
extending from the rear side to the front side of the wooden shank
portion. The blade element includes (i) a proximal end portion, the
proximal end portion having a tongue received in the groove of the
wooden shank portion; (ii) a distal end portion remote from the
proximal end portion; and (iii) a lower edge extending from said
front side to said distal end portion, the lower edge of said
wooden shank portion being a first lower edge, the lower edge of
said blade element being a second lower edge. The ground contacting
portion extends from the rear side of the wooden shank portion to
the distal end portion of the blade element and it comprises a
first segment formed of said first lower edge and a second segment
formed of said second lower edge.
[0006] Advantageously, the ground contacting portion includes a
protective layer. The blade element comprises inner and outer
surfaces extending from the front side of the wooden shank portion
to the distal end of the blade element. Moreover, the blade portion
comprises inner and outer puck engaging portions formed of inner
and outer surfaces that are continuous with inner and outer
sides
[0007] Furthermore, the blade portion also comprises an inner layer
recovering the inner puck engaging portion and an outer layer
recovering the outer puck engaging portion, the inner and outer
layers made of material having a higher rigidity than the blade
element. The blade element is made of foam including fiberglass
fibers while inner and outer layers are made of material including
wood, glass fibers, carbon fibers, kevlar, aluminum, graphite
and/or aramide.
[0008] More advantageously, inner and outer layers are first inner
and outer layers, the blade portion also comprises second inner and
outer layers recovering first inner and outer layers respectively,
second inner and outer layers being made of woven materials.
[0009] The present invention seeks to provide a blade portion
having a weight, stiffness and strength adapted for different
hockey players. The hockey player will thus be able to select
different combinations of hockey stick shafts and blade portions
corresponding to his/her need. While allowing to construct a blade
portion having specific mechanical properties by using different
materials, the present invention also allows to construct a blade
portion that offers a feeling which is similar to a blade portion
being entirely made of wood since it comprises a wooden shank
portion having a lower edge being part of the bottom portion of the
blade portion that contacts the ground.
[0010] Other objects and features of the invention will become
apparent by reference to the following description and the
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] A detailed description of the preferred embodiments of the
present invention is provided herein below, by way of example only,
with reference to the accompanying drawings, in which:
[0012] FIG. 1 is a perspective view of a blade portion constructed
in accordance with the invention;
[0013] FIG. 2 is an exploded perspective view of a wood shank and a
blade element used in the construction of the blade portion of FIG.
1;
[0014] FIG. 3 is a perspective view of the wood shank and blade
element of FIG. 2;
[0015] FIG. 4 is an exploded perspective view of the blade portion
of FIG. 1 before molding, trimming and sanding operations;
[0016] FIG. 5 is a side view of the blade portion of FIG. 1 with a
portion being peel off;
[0017] FIG. 6 is a cross sectional view taken along line 6-6 of
FIG. 1;
[0018] FIG. 7 is a cross sectional view taken along line 7-7 of
FIG. 1;
[0019] FIG. 8 is a cross sectional view taken along line 8-8 of
FIG. 1; and
[0020] FIG. 9 is a side view of the blade portion constructed in
accordance with the invention wherein the final blade portion is
illustrated in full line and the blade portion before molding,
trimming and sanding operations is illustrated in dotted lines.
[0021] In the drawings, preferred embodiments of the invention are
illustrated by way of examples. It is to be expressly understood
that the description and drawings are only for the purpose of
illustration and are an aid for understanding. They are not
intended to be a definition of the limits of the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0022] FIG. 1 illustrates a blade portion 10 for a hockey stick.
Referring to FIGS. 1, 5 and 6, blade portion 10 comprises a ground
contacting portion 12 and inner and outer puck engaging portions 14
and 16. It is understood that the word "inner" refers to the inside
of the curvature of the blade while the word "outer" refers to the
outside of the curvature of the blade. In FIG. 1, blade portion 10
is for a left hockey stick.
[0023] Ground contacting portion 12 comprises first and second
segments 18 and 20. First and second segments 18 and 20 contact the
ground but it is also understood that these segments contact the
ice for a ice hockey stick. Inner puck engaging portion 14
comprises first and second inner puck engaging sections 22 and 24
and outer puck engaging portion 16 comprises first and second puck
engaging sections 26 and 28.
[0024] Referring to FIGS. 2, 3 and 5, blade portion 10 comprises a
wooden shank portion 30 and a blade element 32. Wooden shank
portion 30 comprises a longitudinal axis 34, inner and outer sides
36 and 38 and rear and front sides 40 and 42 between inner and
outer sides 36 and 38. As illustrated in FIG. 2, wooden shank
portion 30 comprises a groove 44 on front side 42, groove 44
extends along longitudinal axis 34. Wooden shank portion 30 also
comprises a lower edge 46 extending from rear side 40 to front side
42.
[0025] Blade portion 10 is a replacement blade for a hockey stick
and wooden shank portion 30 comprises a tenon 48 adapted to be
inserted into a hollow hockey stick shaft made of aluminum,
composite or graphite (not illustrated). It is understood that
instead of having tenon 48, wooden shank portion 30 can be
integrally formed with a wooden hockey stick shaft.
[0026] Blade element 32 comprises a proximal end portion 50 having
a tongue 52. As illustrated in FIG. 3, tongue 52 is received in
groove 44. Blade element 32 also comprises a distal end portion 54
that is remote from proximal end portion 50, inner and outer
surfaces 56 and 58 and lower edge 60. Inner and outer surfaces 56
and 58 are continuous with inner and outer sides 36 and 38
respectively.
[0027] Blade element 32 is made of a light material such as foam,
foam including glass fibers, high-density synthetic foam or
thermoplastic polyurethane foam. For example, liquid foam can be
injected in a mold where a glass fiber layer has been inserted
before in order to manufacture a pre-form blade element made of
foam with glass fibers. Such pre-form blade element may be
afterwards sanded if necessary in order to obtain blade element 32.
Liquid foam sold under the trade-mark MODIPUR, number US 476/20
having a density of 579 kg/m.sup.3 can be used. A glass fiber layer
sold under the trade-mark FIBERGLAS, numbers M8608 or M8610 can be
used.
[0028] Referring to FIG. 4, blade portion 10 also comprises inner
and outer layers 62 and 64. Inner layer 62 recovers a portion 36A
of inner sides 36 of wooden shank portion 30 and inner surface 56
of blade element 32 while outer layer 64 recovers a portion 36B of
outer sides 38 of wooden shank portion 30 and outer surface 58 of
blade element 32. In fact, inner and outer layers 62, 64 recover
inner and outer puck engaging portions 14, 16 respectively.
[0029] Layers 62 and 64 are made of a material having rigidity
higher than the rigidity of blade element 32. For example, layers
62 and 64 can be made of wood, glass fibers, carbon fibers, kevlar,
aluminum, graphite or aramid or a combination of these materials.
In fact, layers 62 and 64 can be made of fibers preformed into
laminated sheets with resin wherein the fibers are any combination
of glass, carbon, kevlar, aluminum graphite or aramid fibers
wherein the percentage of each type of fibers can vary from 0% to
100%. In one embodiment, layers 62 and 64 are unidirectional
fiberglass sheets.
[0030] In order to increase the impact resistance of the blade
portion, inner layer 62 is thicker than outer layer 64. Indeed, the
inner side of the curvature of blade portion 10, being the one that
hits the puck more frequently, it is the one that must have a
better impact resistance. In one embodiment, inner layer 62 is a
unidirectional fiberglass sheet having a thickness of 0.75 mm, a
density of 1375 g/m.sup.2 and a tensile strength of 7000 N/cm while
outer layer 64 is an unidirectional fiberglass sheet having a
thickness of 0.35 mm, a density of 635 g/m.sup.2 and a tensile
strength of 3000 N/cm.
[0031] Advantageously, inner and outer layers 62 and 64 are first
inner and outer layers and blade portion 10 also comprises second
inner and outer layers 66 and 68 that recover respectively first
inner and outer layers 62 and 64 respectively. Second inner and
outer layers 66 and 68 are made of woven materials such as glass
fibers, carbon fibers, graphite, carbon fibers, quartz fibers or a
mixture of carbon fibers, of quartz fibers and of polyethylene
fibers or a combination of these materials.
[0032] It is understood that by selecting a specific fiber
architecture (fiber orientation relative to the longitudinal axis
of the blade element) and a specific materials for first inner and
outer layers 62, 64 and second inner and outer layers 66, 68, and
by selecting a specific material for blade element 32, it is
possible to obtain blade portion 10 having the desired mechanical
properties. In that sense, it is possible to construct a blade
portion having a weight, stiffness and strength adapted for
different hockey players as it is now possible to construct a
composite hockey stick shaft being flexible, medium stiff, stiff or
very stiff. The hockey player will thus be able to select different
combinations of hockey stick shafts and blade portions
corresponding to his/her need. For example, a hockey player who
plays defense may select a flexible hockey stick shaft and a very
stiff blade portion in order to increase velocity of his/her slap
shoot.
[0033] While allowing to construct a blade portion having specific
mechanical properties by using different materials, the present
invention also allows to construct a blade portion that offers a
feeling which is similar to a blade portion being entirely made of
wood since it comprises wooden shank portion 30 having lower edge
46 being part of ground contacting portion 12. It is recognized
that the feeling of the ground is dispersed from the heel of the
blade portion, to the hockey stick shaft and then to the hands of
the player. Since the wood is a better material to disperse such a
feeling than a synthetic material, and since the heel is made of
wood (see lower edge 46), blade portion 10 thus offers a feeling
similar to a blade portion entirely made of wood.
[0034] Similarly, since blade portion 10 comprises wooden shank
portion 30 having inner and outer sides 36 and 38 that are part of
inner and outer puck engaging portions 14 and 16, it offers a
feeling similar to a blade portion entirely made of wood. It is
understood that the feeling of the ground is dispersed to lower
edge 46 even if it is recovered with a thin layer of epoxy, of
fiberglass or of other reinforcement materials. In fact, ground
contacting portion 12 may comprise a protective layer made of
epoxy, fiberglass or tape or a combination of these materials, such
protective layer covering lower edge 46 and lower edge 60.
[0035] In order to manufacture blade portion 10, groove 44 is cut
in front side 42 of wooden shank portion 30. Synthetic blade
element 32 is made for example by injecting MODIPUR liquid foam (45
to 70.degree. C.) within a mold where a fiberglass layer has been
inserted before. Upon addition of the liquid foam within the mould,
the fiberglass layer melds with the liquid foam. After five to ten
minutes, the foam is at solid stage and a blade element made of
foam having glass fibers is then manufactured. Tongue 52 may be
shaped on blade element 32 during the molding operation or
afterwards by sanding a portion of blade element 32 in order to
reduce its thickness.
[0036] Blade element 32 is then affixed to wooden shank portion 30
by inserting tongue 52 in groove 44. Before insertion, an adhesive
bonding agent such as epoxy is put on tongue 52 and in groove 44. A
portion of inner and outer sides 36 and 38 and inner and outer
surfaces 56 and 58 are recovered with first inner and outer layers
62 and 64 made of material such as wood, glass fibers, carbon
fibers, kevlar, aluminum, graphite or armid or a combination of
these materials. First inner and outer layers 62 and 64 are wetted
before with a suitable bonding agent such as resin, epoxy or nylon.
First inner and outer layers 62 and 64 are then recovered with
second inner and outer layers 66 and 68 made of woven materials
such as glass fibers, carbon fibers, graphite, carbon fibers,
quartz fibers or a mixture of carbon fibers, of quartz fibers and
of polyethylene fibers or a combination of these materials. Again,
second inner and outer layers 66 and 68 are wetted before with a
suitable bonding agent.
[0037] Blade portion 10 is afterwards inserted in a mold and heat
and pressure is applied thereto. By the application of heat and
pressure, blade portion 10 is curved to any desired curvature
typically used by hockey players. When the resin is cured, the mold
is opened and blade portion 10 is removed. Excess resin and
material along the edges of blade portion 10 are removed with quick
trimming and sanding operations (see FIG. 9 wherein final blade
portion 10 is illustrated in full lines and blade portion before
trimming and sanding operations is illustrated in dotted
lines).
[0038] The above description of preferred embodiments should not be
interpreted in a limiting manner since other variations,
modifications and refinements are possible within the spirit and
scope of the present invention. The scope of the invention is
defined in the appended claims and their equivalents.
* * * * *