US3915455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadhead arrowtip having a single unit solid body receiving removable very sharp quality cutting blades extending from very nearby the tip to the arrow shaft
Assignee: Individual
•
Filing: 1974-10-18
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Granted: 1975-10-28
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Expires: 1994-10-18
Abstract
Abstract Broadhead arrowtips or arrowheads, referred to as broadheads, are used in the bow and arrow hunting of game animals. Each broadhead has a unique single unit solid body, i.e., a solid one piece ferrule having no moving parts. Each broadhead is not permanently attached to an arowshaft, but instead is quickly and simply installed or removed by threaded attachment to an available threaded insert or a threaded sleeve, secured in turn to the leading end of an arrowshaft. Each broadhead has one or more removable very sharp quality cutting blades which are quickly and simply replaced in longitudinal grooves on the single unit solid ferrule by using a unique locking projection on each cutting blade. Each locking projection interfits with a blade locking or blocking device, often a lock ring, in turn surrounding the ferrule in a circumferential groove. Each cutting blade is long, commencing very nearby the tip and continuing until its final locking contact is made with the arrow shaft through its threaded insert on an aluminum or fiberglass shaft or its threaded sleeve on a wood shaft.
Inventors
- 👤 Maurice W Savora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
F; F42; F42B; F42B6/00; F42B6/02; F42B6/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
358 words
A broadhead used as an arrowtip for an arrow used in hunting game animals, comprising: a. a ferrule in a single piece, therefore with no moving parts, having at least one longitudinal groove to receive a cutting blade commencing very near the pointed commencement of the ferrule and extending at least throughout the exposed length of the ferrule, a circumferential groove not as deep as the longitudinal groove about the ferrule to receive a locking and blocking means, and a non exposed threaded connection structure of the ferrule beyond the exposed length of the ferrule to transfer loads as it is threaded to an arrow shaft via an arrow shaft''s self contained threaded insert or sleeve; b. a locking and blocking means, surrounding the ferrule and positioned in the circumferential groove creating at each longitudinal groove a restrictive opening below the locking and blocking means; and c. at least one cutting blade precision ground to function as a broadhead blade formed substantially as a right angle triangle, having a hypotenuse side sized to slidably and snugly fit a longitudinal groove of the ferrule and extending from very near the pointed end of the ferrule to the end of the exposed length of the ferrule, and also having a cutout structure inclusive of a radial entry and a horizontal projection formed at and near this hypotenuse side edge, this cutout structure allowing the cutting blade to radially enter the longitudinal groove without interference with the locking and blocking means; and upon the subsequent forward sliding of the cutting blade, the horizontal projection of the cutout structure enters the restrictive opening formed below by the locking and blocking means at the longitudinal groove, to thereby initially lock the cutting blade against forward and radial motion, the final locking of the cutting blade occuring as the ferrule of the broadhead is threaded upon the arrow shaft using its non exposed threaded connection structure and the arrow shaft''s self-contained threaded insert or sleeve, and having the longest right angle side serving as the cutting edge, and the shortest right angle side serving as the non barbed trailing edge of the cutting blade.
Claim 2
Dependent Claim
358 words
A broadhead used as an arrowtip for an arrow used in hunting game animals, comprising: a. a ferrule in a single piece, therefore with no moving parts, having at least one longitudinal groove to receive a cutting blade commencing very near the pointed commencement of the ferrule and extending at least throughout the exposed length of the ferrule, a circumferential groove not as deep as the longitudinal groove about the ferrule to receive a locking and blocking means, and a non exposed threaded connection structure of the ferrule beyond the exposed length of the ferrule to transfer loads as it is threaded to an arrow shaft via an arrow shaft''s self contained threaded insert or sleeve; b. a locking and blocking means, surrounding the ferrule and positioned in the circumferential groove creating at each longitudinal groove a restrictive opening below the locking and blocking means; and c. at least one cutting blade precision ground to function as a broadhead blade formed substantially as a right angle triangle, having a hypotenuse side sized to slidably and snugly fit a longitudinal groove of the ferrule and extending from very near the pointed end of the ferrule to the end of the exposed length of the ferrule, and also having a cutout structure inclusive of a radial entry and a horizontal projection formed at and near this hypotenuse side edge, this cutout structure allowing the cutting blade to radially enter the longitudinal groove without interference with the locking and blocking means; and upon the subsequent forward sliding of the cutting blade, the horizontal projection of the cutout structure enters the restrictive opening formed below by the locking and blocking means at the longitudinal groove, to thereby initially lock the cutting blade against forward and radial motion, the final locking of the cutting blade occuring as the ferrule of the broadhead is threaded upon the arrow shaft using its non exposed threaded connection structure and the arrow shaft''s self-contained threaded insert or sleeve, and having the longest right angle side serving as the cutting edge, and the shortest right angle side serving as the non barbed trailing edge of the cutting blade.
Claim 3
Dependent Claim
94 words
A broadhead, as claimed in claim 1, wherein the ferrule in its single piece configuration has respective contoured portions commencing in a short point exposed portion, then a longer gradually enlarging tapered exposed portion, followed by a slightly shorter cylindrical exposed portion, and concluding with an overall non exposed connection portion, which has a non threaded snugly fitting load transfer portion thereof and also an externally threaded portion thereof, the sizes of which meet the standard receiving sizes of internally threaded inserts or sleeves conventionally previously Secured to the leading ends of arrow shafts.
Claim 4
Dependent Claim
271 words
A broadhead serving as an arrowtip for arrows used in hunting game animals, comprising: a. a ferrule which is a solid one piece body having at least one longitudinal groove of a depth approximately one quarter the diameter of the ferrule, commencing near the start of the ferrule and extending at least to the finally exposed portions of the ferrule, to receive a cutting blade, having a circumferential groove formed in the ferrule of sufficient depth to receive a circumferential coiled spring; b. a circumferential coiled spring serving as a blocking and locking means fitted into the circumferential groove formed in the ferrule and passing through part of the depth of the longitudinal groove which receives a cutting blade to remain there during the installation and removal of a cutting blade; and c. a cutting blade, removably secured to the ferrule, of a length commencing very near the commencement of the ferrule and extending to the termination of the finally exposed portions of the ferrule, when it is fitted into place on an arrow shaft, whereby the cutting blade bears against an arrow shaft, having a cut out structure in the blade to first radially clear the circumferential coiled spring and thereafter upon longitudinal forward movement of the blade to cause some of the cut out structure to pass under the coiled spring to thereafter prevent any radial movement of the cutting blade out of the longitudinal groove as long as the cutting blade is not thereafter allowed to be longitudinally moved back, as it is so restricted when the broadhead is serving as the arrowtip mounted on an arrow shaft.
Claim 5
Dependent Claim
271 words
A broadhead serving as an arrowtip for arrows used in hunting game animals, comprising: a. a ferrule which is a solid one piece body having at least one longitudinal groove of a depth approximately one quarter the diameter of the ferrule, commencing near the start of the ferrule and extending at least to the finally exposed portions of the ferrule, to receive a cutting blade, having a circumferential groove formed in the ferrule of sufficient depth to receive a circumferential coiled spring; b. a circumferential coiled spring serving as a blocking and locking means fitted into the circumferential groove formed in the ferrule and passing through part of the depth of the longitudinal groove which receives a cutting blade to remain there during the installation and removal of a cutting blade; and c. a cutting blade, removably secured to the ferrule, of a length commencing very near the commencement of the ferrule and extending to the termination of the finally exposed portions of the ferrule, when it is fitted into place on an arrow shaft, whereby the cutting blade bears against an arrow shaft, having a cut out structure in the blade to first radially clear the circumferential coiled spring and thereafter upon longitudinal forward movement of the blade to cause some of the cut out structure to pass under the coiled spring to thereafter prevent any radial movement of the cutting blade out of the longitudinal groove as long as the cutting blade is not thereafter allowed to be longitudinally moved back, as it is so restricted when the broadhead is serving as the arrowtip mounted on an arrow shaft.
Claim 6
Dependent Claim
174 words
A broadhead serving as an arrowtip for arrows used in hunting game animals, as claimed in claim 3, wherein the ferrule solid one piece body has a non threaded cylindrical portion in which the longitudinal groove terminates and which is of the same inside diameter of a receiving interior of an arrow shaft, which if made of wood may have an insert which is unthreaded first and thereafter threaded, to thereby snugly fit therein and transfer impact loads, and has a threaded cylindrical portion, beyond the non threaded cylindrical portion, to be threadably secured to the interior of an arrow shaft, which if made of wood, may have an insert which is unthreaded first and thereafter threaded, the final securement of the ferrule and its installed cutting blade placing a trailing edge of the cutting blade adjacent an arrow shaft to thereafter transmit impact forces from the blade to the shaft and also to keep the cutting blade in position to remain locked by the coiled spring serving as a blocking and locking means.
Claim 7
Dependent Claim
286 words
A broadhead arrowhead for mounting on an arrow shaft, for use in hunting game animals, comprising: a. a solid ferrule having a forward part culminating in a point, and a cylindrical rearward part which has a sufficiently small diameter to fit within an arrow shaft and which also has a structure for fastening the arrowhead to the arrow shaft, said ferrule having at least one longitudinal groove commencing near the pointed end of the forward part and extending into the rearward part, and also having a circumferential groove about the forward part; b. a retaining structure extending around the ferrule, positioned within the circumferential groove at least partly below the outer surface of the ferrule; and c. at least one blade shaped substantially as a right angle triangle, having a hypotenuse side sized to slidably yet snugly fit within one of the longitudinal grooves, a leading right angle side precision ground to function as a cutting edge, and a trailing right angle side, said hypotenuse side having a slot cut into it to receive the retaining structure when the blade is positioned in the longitudinal groove, said slot extending inwardly from the hypotenuse side and rearwardly toward the trailing right angle side and terminating at a point a distance from the trailing end of the hypotenuSe side roughly equal to the distance between the circumferential groove and the trailing end of the forward part of the ferrule, whereby the retaining structure, when positioned in said slot, prevents forward and radial movements of the blade relative to the ferrule, and whereby the blade is locked in place against rearward motion relative to the ferrule by the arrow shaft when the arrowhead is fastened to an arrow shaft.
Claim 8
Dependent Claim
286 words
A broadhead arrowhead for mounting on an arrow shaft, for use in hunting game animals, comprising: a. a solid ferrule having a forward part culminating in a point, and a cylindrical rearward part which has a sufficiently small diameter to fit within an arrow shaft and which also has a structure for fastening the arrowhead to the arrow shaft, said ferrule having at least one longitudinal groove commencing near the pointed end of the forward part and extending into the rearward part, and also having a circumferential groove about the forward part; b. a retaining structure extending around the ferrule, positioned within the circumferential groove at least partly below the outer surface of the ferrule; and c. at least one blade shaped substantially as a right angle triangle, having a hypotenuse side sized to slidably yet snugly fit within one of the longitudinal grooves, a leading right angle side precision ground to function as a cutting edge, and a trailing right angle side, said hypotenuse side having a slot cut into it to receive the retaining structure when the blade is positioned in the longitudinal groove, said slot extending inwardly from the hypotenuse side and rearwardly toward the trailing right angle side and terminating at a point a distance from the trailing end of the hypotenuSe side roughly equal to the distance between the circumferential groove and the trailing end of the forward part of the ferrule, whereby the retaining structure, when positioned in said slot, prevents forward and radial movements of the blade relative to the ferrule, and whereby the blade is locked in place against rearward motion relative to the ferrule by the arrow shaft when the arrowhead is fastened to an arrow shaft.
Claim 9
Dependent Claim
49 words
An arrowhead, as claimed in claim 5, wherein the forward part of the ferrule commences in a short sharply tapered point portion, is followed by a longer more gradually tapered portion, and ends in a cylindrical portion of a length approximately equal to that of the gradually tapered portion.
Claim 10
Dependent Claim
32 words
An arrowhead, as claimed in claim 6, wherein the slot in the blade first extends inwards substantially normal to the hypotenuse side and then extends rearwards substantially parallel to the hypotenuse side.
Claim 11
Dependent Claim
16 words
An arrowhead, as claimed in claim 7, wherein the ferrule is of a single piece construction.
Claim 12
Dependent Claim
16 words
An arrowhead, as claimed in claim 6, wherein the ferrule is of a single piece construction.
Claim 13
Dependent Claim
32 words
An arrowhead as claimed in claim 5, wherein the slot in the blade first extends inwards substantially normal to the hypotenuse side and then extends rearwards substantially parallel to the hypotenuse side.
Claim 14
Dependent Claim
16 words
An arrowhead, as claimed in claim 10, wherein the ferrule is of a single piece construction.
Claim 15
Dependent Claim
16 words
An arrowhead, as claimed in claim 5, wherein the ferrule is of a single piece construction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |