U.S. patent number RE34,397 [Application Number 07/814,413] was granted by the patent office on 1993-10-05 for arrow ringed broadhead.
Invention is credited to Nicholas J. DelMonte, Louis M. Fioretti.
United States Patent |
RE34,397 |
DelMonte , et al. |
October 5, 1993 |
Arrow ringed broadhead
Abstract
An arrow broadhead tip having a plurality of .Iadd.triangular
.Iaddend.razor sharp blades .Iadd.with cutting edges
.Iaddend.spaced equidistant around the circumference of the tip's
shaft portion all of which are connected .[.on their outer razor
sharp edge.]. .Iadd.at points spaced between the hypotenuse and
their cutting edges .Iaddend.by a razor sharp ring of steel. When
the arrow is shot or propelled from a bow at a hunting target it
hits the skin or hide of the target animal and cleanly cuts a hole
into it with a diameter larger than the arrow shaft's diameter
thereby providing a means for the animal to profusely bleed to
death unimpeded by loose skin or hide closing the hole or the arrow
shaft itself plugging the hole it helped create.
Inventors: |
DelMonte; Nicholas J. (Buffalo,
NY), Fioretti; Louis M. (Cheektowaga, NY) |
Family
ID: |
27103072 |
Appl.
No.: |
07/814,413 |
Filed: |
December 20, 1991 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
Reissue of: |
683321 |
Apr 10, 1991 |
05044640 |
Sep 3, 1991 |
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Current U.S.
Class: |
473/584 |
Current CPC
Class: |
F42B
6/08 (20130101) |
Current International
Class: |
F42B
6/00 (20060101); F42B 6/08 (20060101); F42B
006/08 () |
Field of
Search: |
;273/416,419-422
;30/302 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Shapiro; Paul E.
Attorney, Agent or Firm: Ralabate; James J.
Claims
We claim: .[.1. An arrow broadhead tip comprising:
a) a central tapered tip shaft made of aluminum comprising at its
formost end a protruding cylindrical feature of diameter smaller
than the smallest diameter of any cross section of said taper, and
also comprising adjacent to and in line with said protuberance a
tapered feature whose foremost diameter is larger than the diameter
of said protuberance and which tapers gradually to a larger
diameter at the opposite end of said tapered feature, and also
comprising adjacent to and in line with said tapered feature a snap
ring groove of cylindrical shape and of diameter equal to the
diameter of said protuberance at the opposite end of said tapered
feature, and also comprising adjacent to and in line with said snap
ring groove an extended shaft feature of cylindrical shape and of
diameter equal to the said formost end of said tapered feature, and
also comprising a threaded shaft feature adjacent to and in line
with said extended shaft feature having an external threaded
fastening means for connecting the entire said tapered tip shaft to
an existing arrow shaft,
b) a plurality of blade grooves equally spaced radially around the
exterior of said tapered feature of central tapered tip shaft, each
being a void with a rectangular box shape penetrating to a depth
which is a few thousandths of an inch below the surface of said
protuberance and said snap ring groove, and extending from said
protuberance to said threaded shaft feature,
c) a plurality of blades equal in quantity to said blade grooves
and each made of a corrosion resistant hardened steel and having a
right-triangular shape with the second longest side of said
right-triangular shape having a sharpened razor edge its full
length and comprising a rectangular shaped void beginning on the
hypotenuse of said right-triangular shape and extending normal to
it to a place midway to said razor edge, and comprising a
rectangular shaped feature which is located at and includes the
corner of said right-triangular shape where said hypotenuse meets
the shortest side of said right-triangular shape, and comprising a
semi-circular shaped void beginning on the side of said rectangular
shape nearest said shortest side of said right-triangular shape and
extending midway toward the opposite side of said rectangular shape
which is co-linear, or in line, with said hypotenuse, and each of
said blades having thickness equal to said blade grooves in said
tapered tip shaft so as to have a slight frictional slip fit when
said blades fit into said blade grooves, and length of said
hypotenuse including said rectangular shape equal to the length of
said tapered tip shaft from the point of the smallest diameter of
said tapered feature to the beginning of said threaded feature,
d) a ring blade having a hollow cylindrical shape of length equal
to the widths of said rectangular voids in said blades, and having
one circumferential edge sharpened to a razor edge, and being made
of a corrosion resistant hardened steel,
e) a tip having a sharp pointed conical shape and having a
cylindrical shaped void extending into its interior from the base
of said conical shape and said void having diameter equal to the
diameter of said protuberance of said tapered tip shaft so as to
fit together with a slight frictional force fit, and said tip being
made of corrosion resistant hardened steel,
f) a snap ring means for holding the entire Arrow Ringed Broadhead
assembly together after said blades with said ring blade are
assembled into said grooves of said tapered tip shaft, said means
accomplishing said assembly by sliding over said threaded portion
and said extended shaft feature and into said semi-circular void of
said blades which are in line with said
snap ring groove..]. .Iadd.2. An arrow broadhead tip comprising in
combination the following components: a shaft, a conical tip, a
plurality of triangular blades, and a ring blade, said triangular
blades each having a substantially right triangular configuration
with a hypotenuse side, a second longest side having a cutting edge
and a shortest side, said shaft having a plurality of blade grooves
which traverse the length of said shaft, said hypotenuse sides of
said blades removably fitted into said grooves, said hypotenuse
sides having rectangular voids that extend upwardly from said shaft
to any point before or below said cutting edges of said second
longest side, said ring blade encircling said shaft and tightly
fitted into said rectangular voids at a circumferential portion,
said ring blade having at a forward edge a sharpened portion, said
conical tip fitted onto said shaft at a front or forwardmost
portion of said shaft. .Iaddend. .Iadd.3. The broadhead tip of
claim 2 wherein said shaft is tapered to a smaller diameter at said
front portion. .Iaddend. .Iadd.4. The broadhead tip of claim 2
wherein said shaft has at a terminal rear portion a threaded
section. .Iaddend. .Iadd.5. The broadhead tip of claim 2 wherein
said blade grooves are located and spaced equidistant from each
other around a circumference of said shaft. .Iaddend. .Iadd.6. The
broadhead tip of claim 2 wherein there are three grooves in said
shaft spaced about 120 degrees apart. .Iaddend. .Iadd.7. The
broadhead tip of claim 2 wherein said second longest side having
said cutting edge located at the upper outer portion of each
triangular blade, said hypotenuse being
at a lower-inner portion of each triangular blade. .Iaddend.
.Iadd.8. The broadhead tip of claim 2 wherein said second longest
side has a slight inward curvature. .Iaddend. .Iadd.9. The
broadhead tip of claim 2 wherein said rectangular voids extend up
to about midway from the distance of the hypotenuse to the junction
of said second longest side and said shortest side. .Iaddend.
.Iadd.10. The broadhead tip of claim 2 which has a rectangular
portion containing a grooved section which overlaps rear corners of
each triangular blade. .Iaddend. .Iadd.11. The broadhead tip of
claim 2 wherein said ring blade has a hollow cylindrical shape of
length substantially equal to the widths of said rectangular voids
so as to fit tightly therein. .Iaddend. .Iadd.12. The broadhead tip
of claim 2 wherein measured from said shaft at a shaft location
encircled by said ring blade, said ring blade has a radius smaller
than the distance of the cutting edges of any of said second
longest sides from the shaft at said shaft location. .Iaddend.
.Iadd.13. The broadhead tip of claim 2 wherein said hypotenuse
sides of said triangular blades are connected via their rectangular
voids by said ring blade, said ring blade also encircling said
shaft. .Iaddend. .Iadd.14. The broadhead tip of claim 2 wherein
said cutting edges define outermost portions of said broadhead tip,
said ring blade being smaller in diameter than said outermost
portions. .Iaddend.
Description
FIELD OF INVENTION
This invention relates to amusement devices and more specifically
to arrows and the configuration and structure of broadheads.
BACKGROUND--DISCUSSION OF PRIOR ART
Heretofore prior art has consisted of a multitude of arrow heads
and particularly broadheads used for hunting. The prior art has
consisted of numerous efforts to simplify assembly of razor sharp
blades in a central core element which mounts to the shaft of the
arrow. The numerous configurations show various blade shapes,
quantities, and interlocking means. The major problem presented
while hunting with such arrows and broadheads is that after the
animal has been hit, such as a deer, the animal will run and then
must be tracked. The animal will slowly bleed to death but not
until after running a great distance and many times will never be
found by the hunter due to difficulty tracking the animal. Tracking
is very difficult because the hole in the animal is limited to
approximately the size of the arrow shaft. This hole in the animal
seals itself around the arrow shaft due to the clotting of the
blood around the wound. The animal will run a great distance as
already mentioned, and will die from internal hemorrhaging and
damage to life support organs. Our invention precludes these
problems without affecting the performance of the arrow and its
accuracy in flight.
OBJECTS AND ADVANTAGES
Accordingly we claim the following objects and advantages of our
invention: to provide an arrow broadhead which provides for
aerodynamic and unimpeded flight after being propelled or launched
from a bow; to provide an arrow broadhead which is capable of
cleanly and easily penetrating a large animals outer skin or hide
after reaching it within the range of normal arrow air speed; to
provide an arrow broadhead which creates a clean void or hole in
the animals skin or hide which is larger than the diameter of the
arrow shaft itself; to provide a means for allowing an animal
struck by our invention, after being legally hunted, to bleed
quickly and profusely; to provide a means for more easily tracking
an animal legally hunted and hit by our invention through the snow
or other ground surface conditions; to provide a means for an
animal legally hunted and hit by our invention to die more quickly
from rapid loss of blood previously mentioned; to provide an arrow
broadhead with a unique means for changing or removing the blades
easily and quickly.
DESCRIPTION OF DRAWINGS
FIG. 1 is a pictorial view of the assembled broadhead tip.
FIG. 2 is an exploded pictorial view of all component parts.
FIG. 3 is a plan view of the tapered tip shaft showing section
cutting plane lines 4--4.
FIG. 4 is a sectional view taken from FIG. 3 showing the cross
section of the tapered tip shaft. This sectional view is shown at
an enlarged scale for clarity.
FIG. 5 is a plan view of a blade showing its features and
contour.
FIG. 6 is a pictorial view of the snap ring. This view is shown at
an enlarged scale for clarity.
FIG. 7 is a sectional profile view of the sharp conical tip. This
view is shown at an enlarged scale for clarity.
LIST OF REFERENCE NUMERALS
10--tip.
12--concave cylindrical void.
14--protuberance.
16--tapered tip shaft.
18--shaft front.
20--shaft rear.
22--snap ring groove.
24--shaft extension.
26--threaded shaft.
28--broadhead shaft.
30 (a through c)--blade grooves.
32 (a through c)--blades.
34--ring blade.
36--sharp cutting edge.
38--major blade portion.
40--second longest side.
42--cutting edge.
44--smaller rectangular shape.
46--shortest side.
48--rectangular void.
50--semi-circular void.
52--snap ring.
DESCRIPTION
Referring to FIGS. 1 and 2 which show assembled and exploded
pictorial views respectively, tip (10) made of corrosion resistant
hardened steel and having a finely pointed and sharp conical tip
and a concave cylindrical void (12) (best shown in FIG. 7) at the
opposite end of the sharp tip which accepts and holds protuberance
(14) by means of a tight frictional press fit. Protuberance (14) is
of cylindrical shape and is a homogenous continuous part of the
aluminum tapered tip shaft (16). .[.The taper of the tapered tip
shaft begins at shaft front (18) and gradually tapers to a larger
diameter at shaft rear (20)..]. .Iadd.The taper of the shaft begins
at shaft rear (20) and gradually tapers to a smaller diameter at
shaft front (18). .Iaddend.The diameter at shaft front (18) is
approximately twice as large as the protuberance (14) diameter
(this is best shown in FIG. 2). Also, a continuous and homogenous
part of the tapered tip shaft is snap ring groove (22), shaft
extension (24), and threaded shaft (26). Snap ring groove (22) is a
void created by metal removal so as to form a cylindrical shape of
diameter equivalent to that of protuberance (14). Shaft extension
(24) is a cylindrical shape of diameter equivalent to the shaft
front (18), and the threaded shaft (26) has a major thread diameter
equal to or slightly more than the diameter of the snap ring
groove. Equally spaced at 120 degrees apart from each other are
three blade grooves (30 a through c) which traverse the length of
the broadhead shaft (28) at a depth sufficient to penetrate the
surface of protuberance (14) along the entire protuberance, tapered
tip shaft, and shaft extension, but not the threaded shaft. The
blade grooves are tangent to a diameter equal to or slightly
greater than the major diameter of the threads on the threaded
shaft. The thread on the threaded shaft of this embodiment is a
#8-32UNC external thread, but may be another size and form in the
infinite other similar embodiments of our invention not shown here.
The width of each blade groove is of sufficient dimension to hold
blades (32 a through c) in their radial positions with a slight
frictional slip fit.
Ring blade (34) made from stainless steel is a hollow cylindrical
cutting blade approximately 0.175" long and having a ground bevel
all around one exterior edge of its cylindrical shape extending
inward until it meets the interior cylindrical surface, thereby
forming a sharp cutting edge (36). Our invention consists of more
than one blade (32), but shown herein in this embodiment are three
blades (32 a through c), all made from stainless steel. Each blade
contour is the sum combination of other more simple or fundamental
geometric shapes which best describe its outline. Each blade's
major blade portion (38) is best described by a right triangle
where the second longest side (40) forms the cutting edge (42) by
virtue of a ground bevel from each surface of the blade extending
inward toward the center of the blades edge or thickness. Where the
hypotenuse meets the shortest side of the triangle, a smaller
rectangular shape (44) overlaps the triangle corner formed there so
that the hypotenuse and one edge of the rectangle are coincident
and that the shortest side of the triangle intersects the opposite
side of the rectangle. Both the second longest side of the triangle
(40) and the shortest side (46) have a slight curvature inward, or
radius, thereby replacing those otherwise straight triangle sides.
Approximately halfway along the hypotenuse is a rectangular void
(48) normal to the hypotenuse extending toward the opposite corner
of the triangular shape. Another void, this one of an extended
semicircular shape (50) extends from where the rectangular shape
meets the shortest side (46) partially through the rectangular
shape. The sharp razor edges of the blades may be either straight
or have a slight concave radius upon completion of their
fabrication and prior to their sharpening, as shown in the
embodiment herein. A snap ring (52) made from a spring-tempered
steel is of hollow cylindrical construction with a narrow void
through its entire length, best shown in FIG. 6.
OPERATION
Assembly of the invention described herein is accomplished in the
following manner: tip (10) is pressed onto protuberance (14). Ring
blade (34) is slid over tapered tip shaft (16) and held in place
there by the user's hand while three blades (32) are placed into
blade slots (30) and so that the front tip of each blade fits
snugly against tip (10). Snap ring (52) is then slid over threaded
portion (26) and shaft extension (24) before snapping into place in
snap ring groove (22) over semi-circular slot (50) of the blades
holding them in place. The entire assembly is then threaded into an
existing arrow shaft (not shown nor a part of this invention). The
arrow is then ready for use with our invention mounted to its front
end. As described earlier in Objects and Advantages of this
invention, upon hitting its target such as a deer during deer
hunting season, a hole significantly larger than the arrow's shaft
will be created in the skin or hide of the animal thereby
expediting the bleeding, internal organ damage, and death
processes.
* * * * *