U.S. patent application number 10/876945 was filed with the patent office on 2005-12-29 for sports shaft with end stop.
Invention is credited to Hayden, Mark X., Wittman, Chad M..
Application Number | 20050288132 10/876945 |
Document ID | / |
Family ID | 35506686 |
Filed Date | 2005-12-29 |
United States Patent
Application |
20050288132 |
Kind Code |
A1 |
Hayden, Mark X. ; et
al. |
December 29, 2005 |
Sports shaft with end stop
Abstract
The present invention provides a lacrosse shaft. The lacrosse
shaft has an integral or interlocked end stop to inhibit
stoppage.
Inventors: |
Hayden, Mark X.; (Dencer,
CO) ; Wittman, Chad M.; (Denver, CO) |
Correspondence
Address: |
HOLLAND & HART, LLP
555 17TH STREET, SUITE 3200
DENVER
CO
80201
US
|
Family ID: |
35506686 |
Appl. No.: |
10/876945 |
Filed: |
June 25, 2004 |
Current U.S.
Class: |
473/513 |
Current CPC
Class: |
A63B 60/10 20151001;
A63B 2102/14 20151001; A63B 60/06 20151001; A63B 59/20 20151001;
A63B 60/08 20151001 |
Class at
Publication: |
473/513 |
International
Class: |
A63B 059/02; A63B
065/12 |
Claims
We claim:
1. A lacrosse shaft having an integrated end stop, the shaft
comprising: an elongated body having sidewalls defining a shape of
the shaft; the elongated body having a head end and a butt end; and
a protrusion located on and integral to the butt end, wherein the
protrusion extending outward from the sidewalls such that the
protrusion inhibits a player's hand from slipping from shaft.
2. The lacrosse shaft according to claim 1, wherein the protrusion
has outwardly expanding walls.
3. The lacrosse shaft according to claim 2, wherein the outwardly
expanding walls are substantially straight.
4. The lacrosse shaft according to claim 2, wherein the outwardly
expanding walls are substantially curved.
5. The lacrosse shaft according to claim 1, further comprising
beveled edges.
6. The lacrosse shaft according to claim 2, wherein the outwardly
expanding walls have a flared shape.
7. The lacrosse shaft according to claim 2, wherein the outwardly
expanding walls have a conical shape.
8. A sport shaft, comprising: an elongated body having a shaft
defined by a sidewall; the elongated body being made from a
composite, moldable material a butt end at one end of the elongated
body; and an outwardly extending protrusion integral to the butt
end, wherein the outwardly extending protrusion extends beyond the
sidewall and provides a barrier to inhibit a player's hand from
slipping from the sport shaft.
9. The sport shaft of claim 8, wherein the shaft is designed for
use in a sport selected from the group of sports consisting of
lacrosse, hockey, tennis, racketball, and golf.
10. The sport shaft of claim 8, wherein the composite, moldable
material is carbon fiber.
11. The sport shaft of claim 8, wherein the composite, moldable
material is graphite.
12. The sport shaft of claim 8, wherein the composite, moldable
material is carbon based.
13. The sport shaft of claim 8, wherein the outwardly extending
protrusion comprises a disc shape.
14. The sport shaft of claim 8, wherein the outwardly extending
protrusion comprises a flared shape.
15. The sport shaft of claim 8, wherein the outwardly extending
protrusion has walls.
16. The sport shaft of claim 15, wherein the walls are at least one
of straight or curved.
17. A lacrosse shaft, comprising: an elongated shaft having a head
end and a butt end; the butt end having an inner diameter and an
outer diameter; a lip extending inwardly from the butt end and
defining an opening, the lip having an internal surface and an
external surface; an end stop having an anchor portion, a stem, and
a stopper portion, the anchor portion is connected to the stopper
portion by the stem; the stem extending through the opening defined
by the lip; the anchor having a shoulder, the should being
substantially aligned with the internal surface; and the stopper
portion having a protrusion extending beyond the outer diameter of
the butt end.
18. The lacrosse shaft of claim 17, wherein the protrusion
comprises sidewalls extending outwardly from the elongated
shaft.
19. The lacrosse shaft of claim 18, wherein the sidewalls are
straight.
20. The lacrosse shaft of claim 18, wherein the sidewalls are
curved.
21. The lacrosse shaft of claim 17, wherein the elongated shaft
comprises at least a first material and the end stop comprises at
least a second material where the first material and the second
material are different.
22. The lacrosse shaft of claim 21, wherein the first material
comprises graphite and the second material comprises rubber.
23. The lacrosse shaft of claim 22, wherein the rubber is
vulcanized rubber.
24. The lacrosse shaft of claim 17, wherein the lip has a first end
extension and the shoulder has a second end extension such that the
first end extension and the second end extension engage forming a
snap lock.
25. The lacrosse shaft of claim 24, wherein the first end extension
terminates in a first end protrusion and the second end extension
ends in a second end protrusion that overlap.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to sticks and shafts having a
butt end and, more particularly, a butt end terminating in an end
stop.
BACKGROUND OF THE INVENTION
[0002] Referring to FIGS. 1A and 1B, a conventional sports stick
100 is shown, which is represented as a hockey stick, but could be,
for example, a lacrosse stick as well. Conventionally, stick 100
comprises an elongated, hollow shaft 110 or handle. Shaft 110 has a
playing end 112 and a butt end 114 opposite playing end 112.
Playing end 112 may have a blade 116 attached, as shown for a
hockey stick, a lacrosse head attached, for the lacrosse stick, or
the like.
[0003] As best shown by the exploded view of FIG. 1B, attached to
butt end 114 typically is a cap 118 as shown. Cap 118 is designed
with a volumetric space V to frictionally engage the butt end 114
of shaft 110. Cap 118 is frequently designed with a protrusion 120.
Cap 118, frictionally engaged with butt end 114, and protrusion 120
combine to inhibit a player's hand from slipping off the butt end
of shaft 110.
[0004] FIG. 1C shows a plug 122 that may be used as an alternative
to cap 118. Plug 122 may be inserted into a hollow space H at the
end of hollow shaft 110. Plug 122 would be designed to frictionally
engage shaft 110. Plug 122 has a male portion 124 and may have a
protrusion 126 that expands beyond the outer walls 128 of shaft
110. Male portion 124 may be solid or hollow as a matter of design
choice. Plug 122 frictionally engaged in hollow space H and
protrusion 124 combine to inhibit a player's hand from slipping off
the butt end of shaft 110 also. Conventional end caps or plugs have
numerous shapes other than the simple design shown for
convenience.
[0005] Neither cap 118 nor plug 122, however, are particularly
satisfying solutions to preventing a player's hand from slipping
off the butt end of shaft 110. Often cap 118 or plug 122 separates
from shaft 110 because the force associated with the player's hand
overcomes the frictional engagement.
[0006] Thus, it would be desirous to develop and improved butt end
of a sports shaft to further inhibit a player's hand from slipping
during play.
SUMMARY OF THE INVENTION
[0007] The present invention relates to an improved sports
shaft.
[0008] The improved shaft has a butt end with a protrusion. The
protrusion is integral with or interlocking with the butt end to
inhibit a player's hand from slipping. Also, because the protrusion
is integral and/or interlocked with the butt end, the end stop is
inhibited from detaching.
[0009] The foregoing and other features, utilities and advantages
of the invention will be apparent from the following more
particular description of a preferred embodiment of the invention
as illustrated in the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING
[0010] The accompanying drawings illustrate various embodiments of
the present invention and are a part of the specification. The
illustrated embodiments are merely examples and illustrations of
the present invention and do not limit the scope of the
invention.
[0011] FIGS. 1A-1C illustrates a conventional hockey stick;
[0012] FIGS. 2A and 2B illustrate sport shafts consistent with an
embodiment of the present invention;
[0013] FIGS. 3A-3C illustrate other sport shafts consistent with an
embodiment of the present invention; and
[0014] FIG. 4 shows one possible alternative construction of the
present invention.
DETAILED DESCRIPTION
[0015] The present invention will now be described with reference
to the Figures. While the present invention is being described with
particular reference to a lacrosse specific shaft, one of ordinary
skill in the art will recognize on reading the disclosure that the
present invention would be applicable for other sport shafts where
a player's hand has the potential of slipping off the butt end of a
shaft. Examples of other such shafts include, but should not be
limited to, hockey sticks, racketball rackets, and the like.
[0016] With reference now to FIG. 2A, a lacrosse specific sports
shaft 200 consistent with the present invention is shown. Shaft 200
comprises an elongated body 202 having a head end 204 and a butt
end 206. Shaft 200 could be made of carbon, graphite, carbon
fibers, composites, or other moldable composites, and the like.
Using these materials, butt end 206 can be molded such that butt
end 206 has a protrusion 208. Alternatively, (as shown in FIG. 2B)
butt end 206 can have outwardly expanding walls 210, such that butt
end 206 has a flared shape 212. Outwardly expanding walls 210 can
be straight as shown, curved, or beveled. Further, edges 214 may be
sharp edges or corners or beveled as well.
[0017] One method of manufacturing the shaft 200 comprises use of
graphite or other materials. According to this one embodiment, a
graphite sheet is wrapped around an internal member such as a
dowel. The number of times the graphite sheets is wrapped around
the dowel determines the strength of the shaft. Therefore, stronger
shafts may be wrapped multiple times. When the desired number of
graphite layers has been achieved, the dowel is removed, leaving
the graphite in a tubular arrangement. The tubular graphite is then
inserted into a mold, where it is heated and formed into the mold
shape. The mold, in this case, would have the desired shape of butt
end 206 such that, when heated, the tubular graphite forms into the
desired shape.
[0018] The tubular graphite in this methodology is preferably
hollow, but according to some embodiments it may also be solid. The
graphite is subsequently cooled, and the graphite hardens into the
shaft 200.
[0019] While molding butt end 206 to a particular shape is a
possible solution to the problems associated with the prior art,
players may enjoy the feel of a different material of an end stop
from the shaft proper. FIG. 3A is a cross-sectional view of a shaft
300 that provides an alternative solution to inhibit the end stop
from disengaging from the shaft 300. FIG. 3B shows an end view of
shaft 300. FIG. 3B shows shaft 300 in a generally circular shape,
but shaft 300 could be any geometric shape as a matter of design
and player preference.
[0020] Referring first to FIG. 3A, shaft 300 includes an elongated
body 302 having a head end 304 and a butt end 306. Shaft 300 has a
cross-sectional shape S defined by a sidewall 308. Cross-sectional
shape S is shown as a circle for convenience, but could be numerous
geometries configured for performance and player preference. Butt
end 306 terminates in an inwardly extending lip 310. Lip 310
defines an opening 312. Opening 312 occupies a surface area A and,
in the case of a circular shaft, a diameter d1. Lip 310 has a
thickness t1 and a width w1.
[0021] FIG. 3A also shows an end stop 320. End stop 320 may be made
of rubber or other composites as a matter of design choice. End
stop 302 has an anchor portion 322, a stem 324, and a stopper
portion 326. Anchor portion 322 generally has a shape that
complements shaft 300. In the case of circular shaft 300, anchor
portion 322 has a diameter d3. Stem 324 has a diameter of d2.
Stopper portion 326 has a diameter d4. Diameter d3 is generally
greater than diameter d2 such that anchor portion 322 has a
shoulder 328 extending radially outward from stem 324. Further,
diameter d3 is larger than diameter d1 so shoulder 328 abuts lip
310. Diameter d3 should be greater than d1 but no more than d1 plus
2 times w1. While diameter d3 may be oversized, in this case anchor
portion 322 may buckle or cause shaft 300 to bow.
[0022] Stem 324 connects anchor portion 322 and stopper portion
326. Stem 324 has a thickness or length t2. Length t2 should be
equal to or greater than t1 such that should 328 and stopper
portion 326 fit snuggly around lip 310. Stem 324 has a diameter d2
that should be equal to or less than d1 such that stem 324 can fit
in opening 312.
[0023] Stopper portion 326 has a diameter d4. Diameter d4 should be
greater than an outer diameter d5 of butt end 306. Diameter d4
being larger than diameter d5 causes a protrusion 330 of stopper
portion 326 to extend beyond shaft sidewall 308. Protrusion 330
inhibits a player's hand from slipping off of shaft 300. Further,
the abutment of lip 310 and shoulder 328 inhibits end stop 320 from
disengaging with shaft 300.
[0024] Optionally, and shown in phantom, shaft 300 may have an
internal base 332. A volumetric space 334 is defined by base 332,
sidewalls 308 and lip 310. Volumetric space would have a depth of
t3 or greater, t3 being the thickness of anchor portion 322. Using
base 332 would provide a chamber or clamp like mold to grip anchor
portion 322 and shoulder 328.
[0025] FIG. 3C shows a cross-sectional view of butt end 306 with
end stop 320 inserted. In this case, optional base 332 is also
shown and stopper portion 326 has flared and curved walls 336.
Further, an edge 338 is beveled, although it could be provided as a
sharp corner. Stopper portion 326 could have any design and shape,
including the flared or conical shape associated with FIG. 2B.
[0026] FIG. 4 shows an alternative configuration for lip 310 and
shoulder 328. In this case lip 310 has a first end extension 402.
First end extension 402 extends from lip 310 towards shoulder 328.
Shoulder 328 has a second end extension 404. Second end extension
404 extends from shoulder 328 towards lip 310. First end extension
402 comprises a first protrusion 406 and second end extension 404
comprises a second protrusion 408. Protrusions 406 and 408 form a
snap lock or friction fitting between lip 310 and shoulder 328 that
may facilitate the molding process. Protrusions 406 and 408 are
exemplary, and other interlocking devices could be used, such as,
for example, a protrusion and dimple, a lip and barb, or the
like.
[0027] While the invention has been particularly shown and
described with reference to embodiments thereof, it will be
understood by those skilled in the art that various other changes
in the form and details may be made without departing from the
spirit and scope of the invention.
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