Arrowhead with a pivotal blade selectively positionable in a plurality of different cutting diameters II
First Claim
1. A blade-opening arrowhead comprising:
- (a) an arrowhead body having a central longitudinal axis;
(b) a pivotal cutting blade rotatably mounted to said arrowhead body such that when the arrowhead is penetrating an object said blade abuts against a blade-stop surface so that a furthest cutting section of said blade from said central longitudinal axis is disposed a first shortest distance from said central longitudinal axis, said arrowhead being enabled to have said furthest cutting section of said blade disposed at a second different shortest distance from said central longitudinal axis when said blade is rotatably mounted to said arrowhead body and is abutting against a blade-stop surface when the arrowhead is penetrating an object; and
(c) a deflectable element disposed at least in part rearward of said pivotal blade, said deflectable element producing an urging force in at least a direction substantially parallel to said central longitudinal axis so as to aid in maintaining said pivotal blade selectively in a closed in-flight configuration.
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Abstract
An arrowhead having a pivotal blade rotatably mounted to a corresponding arrowhead body such that the pivotal blade is selectively positionable at different cutting diameters when in corresponding different penetrating configurations so as to enable the arrowhead to have differing penetration and tissue volume cutting capacities. The hinge structure rotatably mounting the pivotal blade to its arrowhead body is positionable at a plurality of different spatial locations relative to the arrowhead body. The blade stop surface, such as a sloped blade abutting surface of a blade stop washer, that the pivotal blade abuts against when penetrating an object or when rotated to an open position is positionable at a plurality of different spatial locations and/or orientations relative to the arrowhead body.
42 Citations
36 Claims
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1. A blade-opening arrowhead comprising:
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(a) an arrowhead body having a central longitudinal axis;
(b) a pivotal cutting blade rotatably mounted to said arrowhead body such that when the arrowhead is penetrating an object said blade abuts against a blade-stop surface so that a furthest cutting section of said blade from said central longitudinal axis is disposed a first shortest distance from said central longitudinal axis, said arrowhead being enabled to have said furthest cutting section of said blade disposed at a second different shortest distance from said central longitudinal axis when said blade is rotatably mounted to said arrowhead body and is abutting against a blade-stop surface when the arrowhead is penetrating an object; and
(c) a deflectable element disposed at least in part rearward of said pivotal blade, said deflectable element producing an urging force in at least a direction substantially parallel to said central longitudinal axis so as to aid in maintaining said pivotal blade selectively in a closed in-flight configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
(a) a recessed annular groove configured upon said arrowhead body, said recessed annular groove having an annular shelf disposed at a forward blind end thereof;
(b) an aperture configured upon said pivotal cutting blade at an attachment end thereof, (c) a hinge shaft extending through said aperture; and
(d) a structural element positionable between said annular shelf and said hinge shaft.
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10. A blade-opening arrowhead as recited in claim 9 wherein said structural element comprises a filler element.
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11. A blade-opening arrowhead as recited in claim 1 wherein said deflectable element is substantially annular.
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12. A blade-opening arrowhead as recited in claim 1 further comprising a plurality of said blades.
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13. An arrowhead comprising:
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(a) an arrowhead body having a blade slot and a substantially internally bound void, said void comprising an interior surface substantially defining the boundary thereof;
(b) a pivotal cutting blade having an aperture disposed at an attachment end thereof;
(c) a hinge shaft disposed in said void and extending through said aperture so as to pivotally attach said blade to said body at least in part within said slot; and
(d) a structural element positionable between said hinge shaft and said boundary. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An arrowhead comprising:
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(a) an arrowhead body having a central longitudinal axis and a substantially internally bound annular groove, said annular groove comprising an annular shelf disposed at a forward blind end thereof;
(b) a pivotal cutting blade having an aperture at an attachment end thereof;
(c) a hinge pin extending through said aperture; and
(d) a structural element positionable between said annular shelf and said hinge pin to space said hinge pin a distance away from said annular shelf so as to enable the arrowhead to define a different cutting diameter than a cutting diameter definable by the arrowhead when said hinge pin is in contact with said annular shelf. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An arrowhead comprising:
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(a) an arrowhead body having a central longitudinal axis;
(b) a pivotal cutting blade;
(c) hinge means for pivotally attaching said blade to said body; and
(d) a blade-stop washer having a plurality of different sloped blade abutting surfaces thereon, wherein when said hinge means is positioned relative to said arrowhead body in a first spatial orientation said arrowhead is enabled to define a plurality of different cutting diameters when said pivotal blade is in abutment against each of said different sloped blade abutting surfaces of said blade-stop washer. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification