US3401938A

US3401938A - Arrowhead attaching means

Info

Publication number: US3401938A
Application number: US595312A
Authority: US
Inventors: Fred B Bear
Original assignee: Victor Comptometer Corp
Current assignee: WK 55 Inc; Kidde Inc
Priority date: 1966-11-02
Filing date: 1966-11-02
Publication date: 1968-09-17
Anticipated expiration: 1985-09-17

Description

Sept. 17, 1968 F. B. BEAR 3,401,938

ARROWHEAD ATTACHING MEANS Filed Nov. 2, 1966 INVENT OR FRED B.BEAR

ATTORNEY United States Patent 3,401,938 ARROWHEAD A'ITACHING MEANS Fred B. Bear, Grayling, Mich., assignor, by mesne assignments, to Victor Comptometer Corporation, Chicago, Ill., a corporation of Illinois Continuation-impart of application Ser. No. 495,835,

Oct. 14, 1965. This application Nov. 2, 1966, Ser.

5 Claims. (Cl. 273-1065) ABSTRACT OF THE DISCLOSURE A hollow arrow shaft and arrowhead assembly including an anchor member insertable within the shaft and having means thereon frictionally engaging the member to the interior of the shaft and also providing a threaded connection for the releaseable attachment of the arrowhead.

This is a continuation-in part of application No. 495,- 835, now abandoned.

This invention relates generally to archery apparatus, and more particularly to arrows having removable and interchangeable heads.

The advantages of an arrow provided with means for interchanging the head thereof are numerous and well known, the principal advantage residing within the ease with which the archer may change from say a hunting arrowhead tip to a target or field arrowhead. Such an arrangement obviates the necessity of an archer having to pack a large number of arrows of various types whenever embarking on a trip so that he will be sure to be prepared for any type of shooting. With the present invention an archer nee-d only have a single set of his favorite type, size and weight of arrow shafts and, utilizing these, he may adapt any of numerous types of arrowheads thereto by a simple maneuver while in the field and without the necessity of requiring any tools or other paraphernalia to adapt the arrow shaft to a specific head.

Arrows with replaceable or interchangeable heads are not new as such; however, with the advent of the hollow glass arrow shafts which are becoming increasingly popular, the problem of providing for an interchangeable arrowhead has become quite apparent, particularly in view of the relatively fragile nature of this type of shaft immediately adjacent its area of attachment to the ar rowhead. Practically all of the replaceable arrowhead type of arrows solve the problem of rectifying a damaged arrowhead tip alone since this portion of the arrow assembly can be readily replaced. However, this feature has been of little use when the arrow shaft itself has also been damaged due to impact of the arrow with a hard object, such as a stone, etc., which latter damage is most prevalent when using glass arrow shafts.

Many efforts in the past to provide arrows having replaceable arrowheads have met with little success due to the insecure attachment of the arrowhead anchor means to the arrow shaft. The present construction overcomes this shortcoming which often arose when the arrow struck a relatively fixed or hard object and caused the arrowhead to recoil from the arrow shaft.

Accordingly, one of the primary objects of the present invention is to provide an arrow comprising a shaft having an easily removed and replaced arrowhead.

Another object of the present invention is to provide an arrow having improved anchoring means in the forward portion of the shaft thereof for receiving any one of the several types of arrowheads.

A further object of the present invention is to provide an arrow having a removable arrowhead and including mounting means comprising an anchor screw 3,401,938 Patented Sept. 17, 1968 ICC provided with locking means for securing the anchor screw to the arrow shaft.

Still another object of the present invention is to provide an arrow comprising a shaft of relatively fragile material and containing supporting means at the forward portion thereof, which supporting means includes anchoring means for the removable attachment of any one of a plurality of arrowheads.

With these and other objects in view, which will more readily appear as the nature of the invention is better understood, the invention consists in the novel construction, combination, and arrangement of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is shown in the accompanying drawing in which:

FIGURE 1 is an exploded perspective view of an arrow according to the present invention;

FIG. 2 is a side elevation, partly in section, of the assembled components of FIGURE 1;

FIG. 3 is a side elevation, partly in section, of an embodiment of the present invention;

FIG. 4 is a perspective view of an alternate type of arrowhead used in conjunction with the present invention; and

FIG. 5 is a perspective view of still another type of arrowhead which may be used in conjunction with the present invention.

FIG. 6 is a side elevation, partly in section, of a modification of the present invention.

FIG. 7 is an enlarged perspective view of the anchor screw shown in FIG. 6.

Similar reference characters designate corresponding parts throughout the several views of the drawing.

Referring now to the drawing, particularly FIG. 1, it will be seen that the present invention comprises a plurality of components which when assembled as illustrated in FIG. 2 provide an arrow assembly, generally designated 1, adapted to offer a high degree of resistance to any sudden impact or shock which the arrow may be subjected to.

The assembly 1 comprises, a hollow arrow shaft of a relatively fragile material such as glass designated 2. Adapted to be inserted within the forward end of the arrow shaft is a support sleeve 3 comprising a cylindrical tube preferably constructed of aluminum or other material having a substantially greater resistance to impact than the arrow shaft 2 itself. The support sleeve 3 is provided with an outside diameter corresponding to the inside diameter of the arrow shaft 2 and is adapted to be inserted into the forward portion of the arrow shaft with its forward abutment surface 4 disposed flush with the forward abutment surface 5 of the arrow shaft. A close press-type fit is desired between the juxtaposed surfaces of the inserted sleeve and arrow shaft. However, to preclude subsequent axial displacement of these two components, any suitable adhesive material (not shown) is used to rigidly interlock the support sleeve Within the arraw shaft when in the assembled position as shown in FIG. 2.

As shown in the drawing, any of various types of arrowheads may be used in conjunction with the present invention. FIGURES 1-3 disclose a broadhead for a hunting-type of arrowhead 6 while FIG. 4 discloses a target or field arrowhead 7 and FIG. 5 illustrates a blunt arrowhead 8'. A feature common to all of the arrowheads utilized in the present invention is that each includes a cylindrical tang 9 attached to the base thereof including a central internally threaded bore 10. Surrounding the tang 9 at its juncture with the base of the arrowhead is a circular shoulder 11. The shoulder 11 presents a fiat surface perpendicular to the longitudinal axis of the arrow shaft and is of a width sufficient to completely overlie the combined widths of the abutments 4 and 5 of the support sleeve 3 and arrow shaft 2, respectively, as will be most clearly seen in the assembled view of FIG. 2. The outside diameter of the tang 9 is such as to provide a close sliding fit with the inside diameter of the support sleeve 3.

Fixedly disposed within the support sleeve 3 is an anchor screw generally designated 12 and comprising a head 13 and a forwardly projecting threaded mounting shaft 14. The head 13 is constructed to provide a tight press fit within the support sleeve 3 and, as shown in the drawing, may be knurled to further enhance the rigid interlocking of these two components by preventing axial displacement therebetween once the anchor screw is forcibly installed. With the anchor screw 12 positioned as shown in FIG. 2 within the sleeve 3, the tang 9 of the selected arrowhead is inserted within the forward open end of the arrow shaft containing the supporting sleeve and pushed rearwardly until the threaded mounting shaft 14 of the anchor screw engages the internal threaded bore 10 of the arrowhead. Rotation of the arrowhead then draws the tang 9 rearwardly further into the arrow shaft as the mounting shaft threads 14 mate and turn within the threaded bore 10 of the tang. The arrowhead is turned until the shoulder 11 thereof tightly engages the flush abutments 4 and 5 of the support sleeve 3 and arrow shaft 2.

From the foregoing it will be seen that an arrow assembly is provided permitting of rapid attachment and replacement of any of various types of arrowheads which when in the assembled position as shown in FIG. 2 insures an absolute perfect alignment of the arrowhead with the central longitudinal axis of the arrow shaft by means of the tang 9 securely anchored and centered within the arrow shaft. It will now be apparent that the anchor screw and tang cooperate to insure this alignment while the abutment of the shoulder 11 of the arrowhead with the assembled support sleeve and arrow shaft provides strength and rigidity to a heretofore somewhat fragile assembly.

The embodiment illustrated in FIG. 3 illustrates an adaptation of the present invention to an arrow assembly comprising an aluminum or other type metal arrow shaft 2a. With a metal arrow shaft it is not absolutely necessary to include additional supporting means such as the sleeve 3 as aforementioned and, accordingly, the anchor screw 12 may be press-fitted directly into the internal bore of the metal arrow shaft 2a as shown in FIG. 3. The manner of attaching and removing the various arrowheads is the same in this embodiment as in the previously described form.

A further embodiment illustrated in FIGS. 6 and 7, although shown in combination with a shaft 2 of the glass fiber type, may of course utilize other forms of shafts such as the metal shaft 2a of FIG. 3. The primary distinction afforded by this latter embodiment is the manner of more securely mounting the anchor screw which is most clearly shown in FIG. 7.

The anchor screw 15 may be constructed of any suitable material, similar to the anchor screw, illustrated in FIGS. 1-3; however, experience has shown that a synthetic plastic composition such as nylon is most desirable. A threaded mounting shaft 14a is provided on the anchor screw adjacent the head 13a which is perfectly substantially longer than the head 13 and may include a plurality of axially spaced peripheral grooves or ridges.

In order to preclude the recoiling of the anchor screw from within the hollow shaft should the assembled arrow strike a relatively fixed or hard object, additional locking means are included to more positively secure the anchor screw within either the support sleeve 3 or shaft 2a. This means comprises a metal washer 16 which is mounted upon the anchor screw 15 at the juncture of the mounting shaft 14a and head 13a as most clearly shown in FIG. 7 of the drawing. A critical feature of this arrangement is the relative dimensions of the components of the arrow assembly. It will be understood that for purposes of clarity the illustration in the drawing is exaggerated. The outer diameter of the metal washer is selected so as to exceed, by a small degree, the inner diameter of either the support sleeve 3 or arrow shaft 2a. It has been found that a washer 16 with an OD. .002" greater than the ID. of the mating shaft 2a or sleeve 3 adequately provides additional security as will be described immediately hereinafter.

The diameter of the head 13a may be equal to the ID. of the sleeve or shaft since it will be understood that by nature, the plastic composition of the anchor screw 15 will exhibit a slight deformability due to its inherent resilience and thus may be installed by means of a force fit. It is the inclusion of the slightly oversize metal washer 16 that provides the more permanent attachment of the screw anchor since, during the insertion thereof, it will be seen that the washer 16 which is preferably of steel, will actually scrape the juxtaposed periphery of the sleeve or shaft which will assume a swaged assembled therewith in view of the softer, more yieldable nature of the aluminum or glass fiber shafting.

It is to be understood that the invention is not limited to the specific features shown, but that the means of construction herein disclosed comprise the preferred form of several modes of putting the invention into effect and the invention will therefore be understood in any of its forms or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. An arrow comprising, a shaft having a hollow forward portion, a threaded anchor member secured within said hollow portion, an arrowhead body provided with a rearwardly disposed tang having an exterior mating fit within said shaft and including threaded means engageable with said threaded anchor member, shoulder means on said arrowhead abutting said shaft when said threaded means is tightened about said anchor member, a hollow sleeve mounted within said shaft with its forward end flush with the end of said shaft, and said anchor member secured within said sleeve and including a head and a forwardly directed threaded mounting shaft.

2. An arrow comprising, a shaft provied with a hollow forward portion, a support sleeve disposed within said shaft with its outer end flush with the end of said shaft, a threaded anchor member mounted within said sleeve, an arrowhead body including a rearwardly disposed tang, said tang forming a mating fit when inserted within said sleeve and having threaded means engageable with said threaded anchor member, shoulder means on said arrowhead abutting the flush ends of said shaft and sleeve when said threaded means is tightened about said anchor member, said anchor member including a head secured within said sleeve and a forwardly directed threaded mounting shaft of lesser diameter than said head.

3. An arrow comprising, a shaft having a hollow forward portion, a threaded anchor member secured within said hollow portion, an arrowhead body provided with a hollow rearwardly disposed tang having an exterior mating fit within said shaft and including internally threaded means engageable with said threaded anchor member, said anchor member including a head having a diameter substantially equal to the inner diameter of said shaft hollow portion, metal locking means carried by said anchor member, said locking means having a diameter greater than both said anchor head and the inner diameter of said shaft hollow portion, and shoulder means on said arrowhead abutting said shaft when said threaded means is tightened about said anchor member.

4. An arrow comprising, a shaft having a hollow forward portion, a threaded anchor member secured within said hollow portion, an arrowhead body provided with a rearwardly disposed tang having an exterior mating fit within said shaft and including threaded means engageable with said threaded anchor member, said anchor member including a head having a diameter substantially equal to the inner diameter of said hollow portion, metal locking means carried by said anchor member, said locking means having a diameter greater than the inner diameter of said shaft hollow portion, a mounting shaft adjacent said anchor head, said locking means comprising a washer disposed on said mounting shaft juxtaposed said anchor head, and shoulder means on said arrowhead abutting said shaft when said threaded means is tightened about said anchor member.

5. An arrow comprising, a shaft having a hollow forward portion, a threaded anchor member of synthetic plastic secured within said hollow portion, an arrowhead body provided with a rearwardly disposed tang having an exterior mating fit within said shaft and including threaded means engageable with said threaded anchor member, said anchor member including a head having a ened about said anchor member.

References Cited UNITED STATES PATENTS 2,289,284 7/ 1942 Chandler 273106.5

FOREIGN PATENTS 717,353 10/1954 Great Britain.

RICHARD C. PINKHAM, Primary Examiner.

P. E. SHAPIRO, Assistant Examiner.