Title:
ARCHERY ARROW WITH SHAFT SUPPORTING ARROW HEAD ASSEMBLY
United States Patent 3868114


Abstract:
An arrow head mounted in a hollow arrow shaft by an attachment member in supportive abutting engagement with the inner peripheral surface of the shaft and the end surface of the shaft with a sleeve member held in supportive abutting engagement with the outer peripheral surface of the shaft and abuttingly retained between the attachment member and the arrow head.



Inventors:
GRONER NORMAN A
Application Number:
05/496946
Publication Date:
02/25/1975
Filing Date:
08/13/1974
Assignee:
VICTOR COMPTOMETER CORPORATION
Primary Class:
International Classes:
F42B6/08; (IPC1-7): F41B5/02
Field of Search:
273/16
View Patent Images:
US Patent References:
3741542ARROWHEAD WITH REMOVABLE BLADES1973-06-26Karbo
3401938Arrowhead attaching means1968-09-17Bear
2568417Arrowhead assembly1951-09-18Steinbacher
2289284Interchangeable arrowhead1942-07-07Chandler



Other References:

Archery Magazine, October, 1972, p. 29, Robin Hood Change-A-Points. .
Archery Magazine, January, 1969, p. 25, Fred Bear Converta-Point Set. .
The Sporting Goods Dealer, August, 1972, p. 138, Bear Converta-Point Set..
Primary Examiner:
Shapiro, Paul E.
Attorney, Agent or Firm:
Klaas, Bruce G.
Claims:
The invention claimed is

1. An archery arrow comprising:

2. The invention as defined in claim 1 and wherein:

3. The invention as defined in claim 1 and wherein:

4. The invention as defined in claim 1 and wherein:

5. An archery arrow comprising:

Description:
BACKGROUND AND SUMMARY OF INVENTION

In the archery field, hollow fiberglass arrows have been utilized for some time and it has been common practice to provide removable attachment means for arrow head members for fiberglass arrows as well as other kinds of arrow shafts. In the past, the ends of such arrows have been subject to deterioration and damage due to stressed induced in the relatively thin wall terminal portions primarily as the result of impact forces transmitted thereto from the arrow head in use of the arrow. Some attempts have been made to solve this problem by utilization of a spacing ring located between the end of the arrow shaft and the arrow head. However, the prior solutions have not been completely satisfactory.

The present invention involves the concept of completely confining the end of the arrow shaft between rigid metallic members which are arranged to reduce the stresses imparted to the end of the arrow shaft. In general, the inventive concepts reside in an arrow head attachment member telescopically mounted in the end of the arrow shaft with a cylindrical support and attachment surface of substantial axial length engaging the inner cylindrical surface of the end of the arrow shaft and a radially extending abutment surface engaging the end surface of the arrow shaft, an arrow head member removably mounted within the attachment member without any abutting engagement with the arrow shaft, and a support and spacer sleeve member having a support sleeve portion with an inner cylindrical peripheral surface extending axially a substantial distance in telescopic relationship to the end of the arrow shaft in abutting supportive engagement with the outer cylindrical peripheral surface of the end of the arrow shaft and having an annular spacer portion mounted in abutting relationship between the attachment member and the arrow head member.

BRIEF DESCRIPTION OF THE DRAWING

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

Fig. 1 is a side elevational view, partly in section, of the front end portion of an archery arrow; and

Fig. 2 is an enlarged partial cross-sectional side elevational view of a portion of the apparatus shown in FIG. 1.

DETAILED DESCRIPTION

Referring to the drawing, the front end portion of a conventional arrow shaft member 10 of fiberglass material is shown in supporting engagement with an attachment and support sleeve member 12, a spacer sleeve member 14, and an arrow head member 16.

The shaft member 10 is hollow with a relatively thin cylindrical wall 20 of fiberglass material having a cylindrical outer surface 22 and a cylindrical inner surface 24 defining a cylindrical chamber 26 and terminating at one end in an annular toroidal transverse end surface 28. The outside diameter of such conventional arrow shafts commonly nominally varies between approximately 0.324 inch and 0.360 inch while the inside diameter commonly nominally varies between approximately 0.269 inch and 0.289 inch. Thus, the thickness of wall 20 is relatively narrow and some problems have been encountered with impact deformation and even shattering or cracking of the terminal portion of the arrow shaft caused by impact forces transmitted to the arrow shaft from the arrow head.

The attachment and support sleeve member 12 is preferably made of one piece of machined relatively soft metallic material such as aluminum comprising a generally cylindrical outer surface 30 having a diameter slightly smaller than the inside diameter of shaft surface 24 so as to be fitted and glued therewith. Outer surface 30 is provided with suitable retaining means in the form of a series of alternating sharp annular ridges 32 cooperable with the inner shaft surface 24 and grooves 34 to retain the glue for member 12 is assembled position. A central longitudinal cylindrical bore 36 has a reduced diameter threaded inner end portion 38 connected to an enlarged diameter outer end smooth wall cylindrical support portion 40 by an inclined abutment shoulder 42. A chamber 43 may be provided at the outer end of bore 36. An annular flange portion 44 on the outermost end of member 12 is defined by a flat transverse end surface 46 facing away from the arrow shaft, cylindrical peripheral surface 48 of larger diameter than surface 30 by an amount approximately equal to the thickness of wall portion 20 of shaft member 10, and an oppositely facing arrow shaft abutment side surface 50.

The spacer sleeve member 14 is made of machined relatively soft metallic material such as aluminum with a cylindrical outer peripheral surface 60, a first inner cylindrical surface 62, having a diameter approximately equal to the outside diameter of arrow shaft member so as to be closely slidably fitted thereon, a second inner cylindrical surface 64 having a diameter approximately equal to the diameter of bore portion 40, a first transverse toroidal abutment surface 66 facing toward the shaft member, a second transverse toroidal abutment surface 68 facing away from the shaft member, a spacer wall portion 70 of substantial width between surfaces 66, 68 a chamfered rear surface 72 terminating in a relatively sharp thin rearwardmost edge 74, and a chamfered front surface 76 intersecting surface 68 along the circumference of a diameter approximately equal to the maximum outside diameter of the arrow head member.

The arrow head member 16 is made of relatively hard machined material such as cold rolled steel comprising a threaded mounting shaft portion 80, a cylindrical support shaft portion 82 connected to the shaft portion 80 by an inclined abutment surface 84, an enlarged intermediate cylindrical body portion 86 connected to the shaft portion 82 by a transverse toroidal abutment surface 88, and a forwardly tapered arrow point portion 90 connected to the body portion 86 by an outwardly curved surface 92.

In the assembled position, member 12 is fixedly mounted in the cylindrical chamber 26 in the end of member 10 with side surface 50 abuttingly engaging the front end side surface 28 of the shaft member. Sleeve member 14 is closely slidably fitted over the end of the shaft member with cylindrical inner surface 62 in close fitting sliding engagement with the outer cylindrical surface 22 of shaft member 10. The length of surface 62 is such (e.g. 0.175 inch) as to extend over a substantial length of the end of the shaft member to supportively confine enough of the end of the shaft member to reduce axial compaction, radial expansion, cracking, and fraying of the end of the arrow shaft due to impact forces imparted thereto from the arrow head in use. In addition, the abutment surface 50 extends radially coextensively with the end surface 28 of the shaft member and cylindrical support surface 30 abutingly engages the inner end surface 24 of the shaft to further confine and support all peripheral surfaces of the entire end of the shaft portion.

Arrow head member 16 is inserted through spacer member 14 with threaded end portion 80 threaded into threaded bore portion 38 of member 12. Abutment surface 88 of arrow head member 16 engages abutment surface 68 on spacer member 14 and forces abutment surface 66 of member 14 into tight abutting engagement with abutment surface 46 of attachment member 12.

Thus, in assembled position, the end of the arrow shaft 10 is completely confined by attachment member 12 and sleeve member 14. In addition, the end surface 28 of the shaft member 10 is spaced from the arrow head by the thickness of flange portion 44 of member 12 and the thickness of wall portion 70 of member 14. In this manner, the end of the arrow shaft is protected from the destructive effects of impact forces in use of the arrow.

It is contemplated that the inventive concepts may be otherwise variously embodied and it is intended that the appended claims be construed to cover alternative embodiments except insofar as limited by the prior art.