US2829894A - Arrowhead - Google Patents

Description

E. J. HENKEL April 8, '195s ARROWHEAD Filed Jan. 10. 1956 mownn-An application JanuaryeioasssfserNoassazsi (Ciara-1065) tiisrventionrelates t oanimprove`ment in arrowheads .and ldealsmoreparticularly v'with arrowheadsaxsed 'for 2,829,894 Patented Apr. 8, 1958 iCC lbroadhea'd blade. When so utilized,'theremovable-blade is mounted at "a substantial angle, preferably ninety degrees, to the primary blade to provide "a .-large'cutting -areawithout hicreasingthe 'weight 'sutliciently toxlecrease penetration. :In'this embodiment 'the primary bla'dehas an `opening through its -base 'to receive the ferrule 'and tits, 'at the forward terminus 'of -the opening, into a bifurcatedtip ofthe ferrule and 'is secured therein. The primary blade is further secured -to the ,ferrule by grooved projections on the rearward surface `o'f the ferrule which receive and retain thehlade .edges which bind the openingin this blade. As used herein, forward refers '.tothe pointed end 'of the arrowhead.

Forthepurpose of illustration a specific embodiment of the invention isshown inthe accompanying drawingin which Fig. l is a plan view Aof the arrowhead showingthe auxiliary blade inposition;

.,Fig. 2 is.a side view of the arrowhead;

.Fig. 3 is asection on line '3-3 of Fig. 2;

.Fig- 4 isapl'an view ,of .the ,auxiliary blade .detached from the arrowhead; and

Y Fig. 5 is a, plan view of'the arrowhead .illustratingfthe method of attachingthe auxiliary 'blade'. L. p "The arrowhead llustratdiinthe accompan" 7 .daw7 ing compises 'three main parts, a truncated cqnically shaped ferrule .-A. serving as a .hub,socket.for the .arrowif'nefrbectfof-thc -present invention is to provide` an Another -object to provide a sharpness in an'arrowheddtwqichlwill-bedight-in'weight and 'which will not appreciably reduce velocity and penetration. Further objects are to provide an arrowhead having a blade which need not be sharpened and honed in the eld and to provide an arrowhead wherein the blades are removable and replaceable so that new blades may be inserted easily and rapidly in the field.

In'accordance with the present invention, the above objects are achieved by providing an arrowhead having a blade which is removable and replaceable by insertion of the blade edgewise through a slot in the side of the circular hollow center of the arrowhead, herein called a ferrule to include any hollow structure adapted to receive an arrow-shaft. The blade has a resilient arm and the blade and ferrule have intertting portions which snap into interlocking relationship to detachably hold the blade in the head. The blade is preferably made of hard, extremely thin, razor-like steel so that it will be light and can be pre-honed at the factory to maximum razor sharpness. When the blade is damaged, for example by a shot that misses, the used blade is removed and discarded and a new one inserted.

In a particular aspect the present invention includes an arrowhead having a blade which is provided with an opening through its base to form, at the forward end of the opening, rearwardly projecting shoulders engaging opposite sides of the ferrule and, at the rearward end, C-shaped resilient arms having lugs on the extremity of the nturning ends. The blade is inserted edgewise in a slot extending through the ferrule, the projecting shoulders aligning the blade axially with the ferrule, and the lugs on the arms snapping into cooperating openings in the ferrule to detachably secure the blade to the head.

In the preferred embodiment of the invention, the removable blade is utilized as an auxiliary blade in an arrowhead also having a primary, relatively thick,

shaft,A a` primary 'broad-head bladeB, and a replaceable auxiliary blaileC. Y vy lv i;

"Ihe .ferrule A.has a .bifuncated tip .1, a transverse slot 2, retaining openings 3, and grooved projections 4 :in its rearward wall. .The ,projections 4.are formed, for example,.by.striking themallnf the ferrule. A. V

'The Blade'B.has.sharpened.edges 5 diverging fromran acute angle point 6 and an opening D through its base to receive the ferrule. This opening is enlarged in its middle portion to reduce the weight of the blade. The blade B is secured to the ferrule by-insertion, at the forward terminus 7 of the opening D, into the bifurcated tip 1 of the ferrule and by pinching the sides of the ferrule tip securely against the blade or riveting at 8. The blade is further secured to the ferrule by inserting the edges 9 of the blade into the ferrule projections 4. If desired, the edges 9 may be secured in the projections 4 by brazing or silver soldering.

The auxiliary blade C comprises diverging cutting edges 10 and an opening E through its base to form a transverse abutment edge 1l with rearwardly projecting shoulders l2, and C-shaped arms 13 turning inwardly from the rearward ends 14 of the cutting edges 10. The ends 15 of the projecting arms are provided with lugs 16.

To position the blade C in the ferrule A, one of the C-shaped arms 13 is inserted through the forward slots 2 in the ferrule. The blade is then rotated sufficiently to align it axially with the ferrule and the blade moved rearward of the ferrule to contact the edge 11 of the blade with the rear edge of the slot 2. To facilitate insertion and rotation of the blade C in the slot 2, the other C-shaped arm may be tiexed over the ferrule A or the slot 2 may be extended forwardly sufficiently to make such flexing unnecessary. The shoulders 12 of the blade contact and align with the outside surface of the ferrule. The blade is retained in position by the lugs 16 on the blade arms which snap into the cooperating rear openings 3 in the ferrule. Further alignment of the blade is provided by the edges 1S of the arms which contact the surface of the ferrule rearward of the shoulders 12. To retain alignment of the blade with the ferrule, the length a of the blade C should be substantially the same as the length b between the slot 2 and the opening 3 3 on the ferrule. Alternatively, alignment can be maintained by providing the lugs 16 at substantially the same length as the openings k3. Toremove the b1ade the above" procedure is reversed. This attachment is illustrated in Fig. 5.

An arrowhead is thus provided .with ablade which is extremely thin and pre-honed at'the factory to an extreme degree of edge sharpness. not possible in conventional lixed blades. In addition to a greater cutting area made possible by this invention, the increased sharpness of the blade herein provided will cut through more arteries and veins, cause more hemorrhage, and thus kill game more surely.

In the embodiment illustrated, the ferrule A and the primary broadhead blade B, without the auxiliary blade C, have utility substantially similar to arrowheads used heretofore. This combination'can thus be used .and sold for non-critical purposes while the auxiliary blade can be inserted where damage is desired.

It is evident that dovetailfbarbs can be provided, if desired, by extending the diverging cutting'edges of the blades rearward. It is further evidentthat the ends 15 of the C-shaped arms of the auxiliary bla'de C may be secured to the ferrule A by grooved projections in the wall of the ferrule similar to those illustrated at 4. Such projections would replace the 'openings 3 and would make the lugs 16 unnecessary. It should be understood that such modifications are included within the scope of this invention.

It should be further understoodthat the present disclosure is for the purpose of illu'stration'onlyv and that the invention includes all modilications and equivalents which fall within the scope of theappended claims.

' I claim: 1 1. An arrowhead comprising `a ferrule, a main blade on the ferrule which projects beyond theV forward end thereof, the arrowhead having a slot extending thereand closed at each end, and an arrow-shaped blade recessed at its rearward end, the length of said slot being greater than the length of the blade from its tip to the forward end of said recess so that, after the blade has been inserted into the slot, it has lengthwise movement to an operative position, the blade having abutment surfaces positioned to be brought into abutting relation to the ferrule by said movement and formed to restrain displacement of the blade transversely yof the ferrule, and releasable means to hold the blade against lengthwise movement in said operative position.

2. An arrowhead comprising a ferrule, a main blade on the Iferrule which projects beyond the -forward end thereof, the arrowhead having a slot extending therethrough from side to side transversely of the main blade and closed at each end, and an arrow-shaped blade recessed at its rearward end to form two rearwardly extending legs, the length of said slot being greater than the length of the blade from its tip to the forward end of said recess so that, after the blade has been inserted into the slot by passing one of said legs through the slot, it has lengthwise movement to an operative position, the blade having transverse abutment surfaces positioned to be brought into abutting relation to the ferrule by said movement and formed to restrain displacement of the blade transversely of the ferrule, and releasable means to hold the blade against lengthwise movement in said operative position.

References Cited in the file of-this patent UNrrEDsTATEs PAfrErrrsl

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