U.S. patent number 3,910,579 [Application Number 05/480,021] was granted by the patent office on 1975-10-07 for swivel-mounted hunting arrowhead.
Invention is credited to Harold R. Sprandel.
United States Patent |
3,910,579 |
Sprandel |
October 7, 1975 |
Swivel-mounted hunting arrowhead
Abstract
A swivel-mounted hunting arrowhead adapted to be secured to the
front end of an arrow shaft to be rotatable with respect thereto.
Also disclosed is a swivel-action adaptor for securement to the
front end of an arrow shaft, the adaptor being constructed to have
fastened to it a conventional-type head whereby the latter is
rotatably mounted with respect to the shaft. In the case of the
adaptor there is provided a short bushing of small diameter,
arranged to be cemented in the forward end of the arrow shaft.
Turnably carried by the bushing is a spindle which has at its
foremost end a tapered head provided with protuberances by which
the spindle head can be securely cemented in the socket of an
arrowhead of conventional design, thereby to enable the
conventional arrowhead to turn freely with respect to the shaft. In
another embodiment, the arrowhead is made up of a straight shank
and a plurality of tapered blades secured thereto, as well as
manually operable means on the shank for releasably clamping the
blades with their pointed ends foremost. The construction includes
a mounting means in the form of a swivel structure by which the
shank of the arrowhead is turnably mounted on the forward end of
the shaft, so as to be freely rotatable about the axis of the
arrow.
Inventors: |
Sprandel; Harold R. (Monroe,
CT) |
Family
ID: |
23906355 |
Appl.
No.: |
05/480,021 |
Filed: |
June 17, 1974 |
Current U.S.
Class: |
473/584 |
Current CPC
Class: |
F42B
6/08 (20130101) |
Current International
Class: |
F42B
6/08 (20060101); F42B 6/00 (20060101); F41B
005/02 () |
Field of
Search: |
;273/16.5B |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Shapiro; Paul E.
Attorney, Agent or Firm: Lehmann; H. Gibner Lehmann; K.
Gibner
Claims
I claim:
1. An arrowhead construction having, in combination:
a. an arrowhead comprising a body portion and tapered blade
portions,
b. means attached to said body portion, for mounting the same on
the front end of an arrow shaft to constitute an extension
thereof,
c. said mounting means comprising a swivel structure enabling the
body and blade portions to have turning movement with respect to,
and about the axis of, the arrow shaft,
d. the blade portions of the arrowhead having pointed ends and
being disposed around and in coextensive relation to said body
portion, and
e. manually operable means on said body portion for releasably
clamping said blade portions thereto with their pointed ends
foremost,
f. said body portion of the arrowhead comprising a shank
coextensive with the blade portions thereof,
g. said clamping means comprising a nut carried by said shank,
h. said shank and nut having cooperable screw threads enabling the
nut to be advanced against the blade portions,
i. said nut having a recess at one end, constituting a mouth
portion adapted to receive the rear ends of said blade portions to
lock the same to the shank,
j. said swivel structure comprising a smooth end portion of the
shank and a bushing in which the smooth end portion is
turnable,
k. said bushing being adapted for securement in the front end of
the arrow shaft.
2. An arrowhead construction as in claim 1, and further
including:
a. a thrust washer carried on the smooth portion of the shank and
engaged with one end of said bushing to take up thrust forces
between the shank and bushing.
3. An arrowhead construction having, in combination:
a. an arrowhead comprising a body portion and tapered blade
portions,
b. means attached to said body portion, for mounting the same on
the front end of an arrow shaft to constitute an extension
thereof,
c. said mounting means comprising a swivel structure enabling the
body and blade portions to have turning movement with respect to,
and about the axis of, the arrow shaft,
d. a bushing adapted to be received in the shaft of the arrow,
and
e. a spindle extending into said bushing and constructed to rotate
with respect thereto,
f. said spindle having means for attachment to said arrowhead body
portion,
g. said bushing having a stepped bore,
h. said spindle having a stepped exterior bearing surface
receivable and turnable in the bore of the bushing.
Description
BACKGROUND
This invention relates to arrow constructions, and more
particularly to arrowheads of the type intended to be used for
hunting purposes. Heretofore, various types of arrowheads have been
proposed and produced, some including replaceable blades which are
detachably mounted on a tapered shank or body portion to enable
their replacement, sharpening, etc. So far as I am aware, there has
never been proposed or produced an arrow consisting of a blade-type
arrowhead which is turnably mounted on the foremost end of the
arrow shaft. Prior arrows all consisted of arrowheads which were
fixed on their shafts and which turned with the shafts as the
latter rotated during flight. These prior arrows had several
disadvantages and drawbacks. The broadhead, since it was turning at
the time that it struck the animal, tended to tear the flesh and
cause torqueing of the head which reduced the penetration.
Additionally, the broadhead in many instances adversely effected
the accuracy of the flight pattern.
SUMMARY
The above drawbacks and disadvantages of prior gaming or hunting
arrows are obviated by the present invention, which has for an
object the provision of an improved arrowhead construction wherein
the broadhead is turnably mounted with respect to the shaft and
need not turn or spin at the same rate as the latter during flight,
and wherein the arrowhead does not turn at all at the time that the
arrow penetrates the flesh of the animal.
Another object of the invention is to provide an improved arrowhead
construction as above set forth, which results in an arrow that has
a truer flight and that penetrates more deeply into the flesh with
less tearing, at the time it strikes the target game. Still another
object of the invention is to provide an improved arrowhead adaptor
construction characterized by a swivel structure, whereby
conventional arrowheads or broadheads can be mounted on
conventional arrow shafts in a manner to be turnable with respect
thereto, thereby to achieve a truer flight and a greater
penetration of flesh, all without torqueing or binding of the head
or excessive tearing.
The above objects are accomplished by a unique arrow construction
comprising a broadhead or arrowhead which has a body portion and
blade portions, in conjunction with means attached to the body
portion for mounting the same on the front end of an arrow shaft to
constitute an extension thereof, said mounting means comprising a
swivel structure enabling the body and blade portions to have
turning movement with respect to, and about the axis of, the arrow
shaft. The swivel structure may be constituted as an adaptor
attachable to the arrow shaft, or it may be part of an arrowhead
consisting of a shank and removable and replaceable blade portions.
In the latter case, manually operable means are provided for
releasably clamping the blade portions to the shank with their
pointed ends foremost.
Features of the invention include the provision of an improved
arrowhead construction as above characterized, which is especially
simple, economical to fabricate and at the same time effective and
reliable in its operation.
Still other features and advantages will hereinafter appear.
In the accompanying drawings:
FIG. 1 is a view partly in side elevation and partly in axial
section of an arrowhead construction constituting one embodiment of
the invention.
FIG. 2 is a transverse sectional view taken on line 2--2 of FIG.
1.
FIG. 3 is a transverse sectional view taken on line 3--3 of FIG.
1.
FIG. 4 is a transverse section taken on the line 4--4 of FIG.
1.
FIG. 5 is a transverse section taken on the line 5--5 of FIG.
1.
FIG. 6 is a view partly in side elevation and partly in axial
section of an adaptor fitting constituting another embodiment of
the invention.
Referring first to FIGS. 1-5, the improved arrowhead construction
as illustrated therein comprises an arrowhead proper designated
generally by the numeral 10, comprising a body portion 12 and blade
portions 14. The arrowhead 10 is mounted on an arrow shaft 16 by
means attached to the body portion 12, said means being designated
18 and locating the arrowhead so as to constitute a forward
extension of the shaft 16.
In accordance with the present invention, the mounting means 18
comprises a swivel structure which enables the body and blade
portions 12, 14 to have turning movement with respect to, and about
the axis 20 of, the arrow shaft 16.
The blade portions 14 of the arrowhead 10 are seen to have a
triangular shape, with pointed forward ends 22. As shown in FIGS. 2
and 3, the blade portions are disposed symmetrically around the
body portion 12; in FIG. 1 the blade portions 14 are seen to be
coextensive with the body portion 12. As provided by the invention,
the body portion 12 is constituted as a shank or rod 24 of uniform
diameter, provided with a plurality of longitudinally extending,
diametrically opposed grooves 26 in which the hypotenuse portions
of the blades 14 are fitted.
At its foremost end the shank 12 is secured in a pointed tip member
28 which has a socket 30 at its rear to receive not only the
foremost end of the shank, but also the front tip portions of the
blades 14, thereby to confine and secure the blades to the shank. A
suitable cement can be employed to attach the pointed tip 28 to the
assemblage of shank and blades, as will be understood.
In accordance with the invention, the mounting means 18 includes a
manually operable nut 32 which is carried on a threaded portion 34
of the shank 12. The foremost end of the nut 32 has a conical
socket or mouth 36 which can be screwed over the rear sloping edges
38 of the blades 14, thereby to simultaneously securely clamp all
of the blades to the shank 12 against dislodgement. Tightening the
nut 32, that is, screwing it forward or to the left as viewed in
FIG. 1, results in the foremost tip portions of the blades being
forced into the socket 30 of the tip member 28. The nut 32 at the
rear ends of the blades securely holds these in place as it is
tightened.
As provided by the invention, the shank 12 has a smooth bearing
portion 40 which is turnably carried in a bearing sleeve or bushing
42 that is secured in the foremost end of the arrow shaft 16, as by
the use of a suitable cement. The bushing 42 has at its forward end
an outturned flange 44 adapted to engage the front end of the shank
16 to position the bushing, and also adapted to engage a thrust
washer 46 carried on the bearing portion 40 of the shank 12 against
the end of the thread portion 34 thereof. At its rear 48 the shank
12 is of reduced diameter, and carries a clincher washer 50 bearing
against a flat washer 52 which latter engages the inner end of the
bearing bushing 42 and holds the shank 12 captive in the
bushing.
With the above arrangement, the shank 12 is freely turnable in the
bearing bushing 42 and thus with respect to the arrow shaft 16
whereby it need not turn during turning movements of the shaft, as
during the flight of the arrow. Further, when the arrow strikes the
game, the head 10 will not turn, but instead will penetrate the
flesh deeply and with much less tendency to tear the same, even
though the shaft 16 continues its own rotation.
The embodiment of the invention illustrated in FIG. 6 comprises an
adaptor for mounting broadheads 56 of conventional construction on
the conventional shafts 16 of arrows. The adaptor comprises a
spindle member 58 which is carried in a bearing bushing 60 that is
cemented in the front end of the arrow shaft 16, the bushing being
positioned by a foremost outturned flange 62 thereof. The spindle
58 is of stepped construction with a large diameter portion 64 and
a small diameter portion 66, these portions being received
respectively in large and small bores 68, 70 of the bearing
bushing.
The adaptor spindle 58 has an enlarged forward or head portion 72
provided with external threads or circular ribs adapted to be
received in a socket 74 of the broadhead and to be cemented
therein. A retainer washer 76 carried on the innermost tip portion
78 of the spindle retains the latter in the bearing bushing 66.
With the above described adaptor it is possible to mount various
types of arrowheads or broadheads on an arrow shaft in such a
manner that the arrowhead is freely turnable with respect to the
shaft. Accordingly, the adaptor provides the same advantages as
those set forth above in connection with the construction of FIGS.
1-5.
It will now be understood from the foregoing that I have provided a
novel and improved arrowhead construction wherein the turnable
arrowhead improves the penetration of the arrow into the flesh of
the game, without any tendency to tear the flesh. Moreover, by
virtue of the arrowhead being turnable independently of the arrow
shaft, there is had a truer flight due to less tendency for the
arrowhead to adversely influence the path of travel. The blade
portions 14 are easily and quickly removed and replaced by merely
loosening and again tightening the manually operable nut 32, in the
embodiment of FIGS. 1-5. The shank 12 is of uniform diameter along
the blades 14, thereby enabling the fullest penetration of the
arrowhead without hindrance, into the flesh of the game. Either
two, three, four or more of the blades 14 can be utilized,
depending on the number of grooves provided in the shank 12, as
will be understood.
Variations and modifications are possible without departing from
the spirit of the invention.
* * * * *