Penetration enhancing aerodynamically favorable arrowhead

• US 6,258,000 B1
• Filed: 05/28/1999
• Issued: 07/10/2001
• Est. Priority Date: 05/21/1998
• Status: Expired due to Term

• Current Assignee: Victor Jay Liechty II (Victor Jay Liechty)
• Original Assignee: Victor Jay Liechty II (Victor Jay Liechty)
• Inventors: Liechty, Victor Jay II
• Primary Examiner(s): Ricci, John A.
• Application Number:
  US09/322,278
• Time in Patent Office: 774 Days
• Field of Search: 473/578, 473/582, 473/583, 473/584
• US Class Current: 473/583
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads

Abstract

Aerodynamically favorable arrowheads such as pivotal blade arrowheads and/or blade-opening arrowheads that have a sharp cutting edge located upon their arrowhead bodies at a location forward of a corresponding main cutting blade cutting edge when in a penetrating configuration such that the arrowheads maintain favorable aerodynamic flight characteristics and cut target material in front of the main cutting blades when penetrating a target so as to eliminate the frictional drag that the otherwise dull arrowhead bodies would generate with the target before the main cutting blades began cutting target material thereinfront.

Claims

1. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a cutting blade having a first cutting edge; and

(d) a second cutting edge configured upon said arrowhead such that at least a section thereof extends forward of said first cutting edge when said arrowhead is in a penetrating configuration, wherein when said arrowhead is in an in-flight configuration the perpendicular distance from said longitudinal axis to the furthest section of said cutting blade from said longitudinal axis is longer than the perpendicular distance the furthest section of said second cutting edge is displaced from said longitudinal axis.

2. An arrowhead as recited in claim 1 wherein when said arrowhead is in said penetrating configuration the forward terminus of said second cutting edge is located rearward of said forward leading end of said arrowhead.

3. An arrowhead as recited in claim 2 wherein the rearward terminus of said second cutting edge is located forward of a forward terminus of said first cutting edge.

4. An arrowhead as recited in claim 2 wherein the rearward terminus of said second cutting edge is located closer to said forward leading end of said arrowhead than to a forward end of an arrowshaft when said arrowhead is attached to said arrowshaft.

5. An arrowhead as recited in claim 2 wherein said second cutting edge has a linear length that is less than the linear length of said first cutting edge.

6. An arrowhead as recited in claim 2 wherein at least a section of said cutting blade projects outward from said arrowhead body when said arrowhead is in said in-flight configuration.

7. An arrowhead as recited in claim 2 further comprising an arrowhead tip located at said forward leading end of said arrowhead, said arrowhead tip comprising a facet and a facet boundary such that said second cutting edge is located rearward of said facet boundary when said arrowhead is in said penetrating configuration.

8. An arrowhead as recited in claim 7 wherein said facet boundary is substantially in coplanar alignment with at least a linear section of said second cutting edge.

9. An arrowhead as recited in claim 2 wherein when said arrowhead is in said penetrating configuration a line parallel to said central longitudinal axis that is displaced a distance outward from an exterior surface of said arrowhead body intersects said second cutting edge while intersecting at least a section of said cutting blade.

10. An arrowhead as recited in claim 9 wherein said parallel line intersects said first cutting edge when intersecting said second cutting edge.

11. An arrowhead as recited in claim 9 wherein said cutting blade is pivotally hinged to said arrowhead body.

12. An arrowhead as recited in claim 11 wherein said arrowhead is a blade-opening arrowhead and said cutting blade rotates in a rearward direction when rotating from said in-flight configuration to said penetrating configuration.

13. An arrowhead as recited in claim 12 wherein when said arrowhead is in said penetrating configuration a first plane parallel to a side face of said cutting blade that intersects at least a linear section of said first cutting edge is not in perpendicular alignment with a second plane that is parallel to said central longitudinal axis and intersecting at least a linear section of said second cutting edge.

14. An arrowhead as recited in claim 1 wherein said second cutting edge is disposed on a second cutting blade attached to said arrowhead.

15. An arrowhead as recited in claim 14 wherein said second cutting blade is a fixed blade.

16. An arrowhead as recited in claim 15 wherein said arrowhead is a blade-opening arrowhead.

17. An arrowhead as recited in claim 15 further comprising a shaft configured upon said arrowhead so as to aid in fixedly attaching said second cutting blade to said arrowhead body.

18. An arrowhead as recited in claim 17 wherein at least a section of said shaft is threaded, said arrowhead body comprising a through hole having at least a section thereof threaded so as to receive said threaded section of said shaft therein when said fixed blade is attached to said arrowhead body.

19. An arrowhead as recited in claim 17 wherein said fixed blade has an aperture, said shaft extending through said aperture when said fixed blade is attached to said arrowhead body.

20. An arrowhead as recited in claim 19 wherein said arrowhead is a blade-opending arrowhead.

21. An arrowhead as recited in claim 17 wherein said arrowhead body is a single integral structural entity.

22. An arrowhead as recited in claim 14 wherein said cutting edge of said pivotal blade is substantially in coplanar alignment with said cutting edge of said fixed-blade when said arrowhead is in said penetrating configuration.

23. An arrowhead comprising:

(a) an arrowhead body having;

(i) a central longitudinal axis;

(ii) an exterior surface; and

(iii) a first blade slot and a second blade slot configured thereupon such that at least a section of said second blade slot is located substantially forward of said first blade slot;

(b) a first blade attached to said arrowhead body at least in part within said first blade slot; and

(c) a second blade attached to said arrowhead body at least in part within said second blade slot, wherein a line parallel to said central longitudinal axis intersects both said blade slots.

24. An arrowhead as recited in claim 23 wherein each said slot is externally exposed to only one opposing elongate side of said arrowhead body.

25. An arrowhead as recited in claim 23 wherein each said blade slot comprises a pair of opposing bounding sidewalls that each extend to an exposed exterior corner at their conjunction with said arrowhead body exterior surface so that when said parallel line is displaced a perpendicular distance away from said central longitudinal axis equal to a perpendicular distance that at least one of said second slot exterior corners is displaced from said central longitudinal axis, such that said parallel line is not located outside of said second slot sidewalls, said parallel line intersects at least a section of said first slot.

26. An arrowhead as recited in claim 25 wherein said first slot is substantially parallely aligned with said central longitudinal axis.

27. An arrowhead as recited in claim 23 wherein said second blade is located rearward of the forward leading end of said arrowhead body.

28. An arrowhead as recited in claim 23 wherein a forward terminus of said second slot does not communicate with said longitudinal axis.

29. An arrowhead as recited in claim 23 wherein when said arrowhead is in an in-flight configuration the perpendicular distance between said longitudinal axis and the furthest section of said first blade from said longitudinal axis is longer than the perpendicular distance between said longitudinal axis and the furthest section of said second blade from said longitudinal axis.

30. An arrowhead as recited in claim 23 wherein each said blade comprises a cutting edge.

31. An arrowhead as recited in claim 30 wherein at least a linear section of each said cutting edge is substantially in coplanar alignment with each other when the arrowhead is in a penetrating configuration.

32. An arrowhead as recited in claim 31 wherein a rearward terminus cutting edge of said second blade is situated substantially forward of said first blade when the arrowhead is in an in-flight configuration.

33. An arrowhead as recited in claim 30 wherein when said arrowhead is in an in-flight configuration a plane perpendicular to said longitudinal axis of said arrowhead body intersects both said first blade and said second blade.

34. An arrowhead as recited in claim 30 wherein said arrowhead is a blade-opening arrowhead such that when in an in-flight configuration a non-sharpened leading section of said first blade outwardly projects from said arrowhead body.

43. An arrowhead as recited in claim 31 further comprising a plurality of said blades.

44. An arrowhead as recited in claim 43 wherein said hollow cylinder comprises an elongate central axis, said central axis of said cylinder being collinear with said central longitudinal axis of said arrowhead body.

45. An arrowhead as recited in claim 43 wherein the furthest section of said pivotal blade from said central longitudinal axis is further from said central longitudinal axis than is the furthest section of said fixed blade.

46. An arrowhead as recited in claim 45 wherein at least a section of said shaft is threaded, said arrowhead body comprising a through hole having at least a section thereof threaded so as to receive said threaded section of said shaft therein when said fixed blade is attached to said arrowhead body.

47. An arrowhead as recited in claim 46 wherein said fixed blade has an aperture, said shaft extending through said aperture when said fixed blade is attached to said arrowhead body.

48. An arrowhead as recited in claim 47 wherein said arrowhead is a blade-opening arrowhead.

49. An arrowhead as recited in claim 46 wherein said arrowhead body is a single integral structural entity.

50. An arrowhead as recited in claim 49 wherein the exterior surface of said integral cutting protrusion on at least one side of said integral cutting edge as determined in a plane perpendicular to said central longitudinal axis has at least a section thereof with a differing mathematical slope than at least another section of said exterior surface of said integral cutting protrusion on said side of said integral cutting edge.

51. An arrowhead as recited in claim 47 further comprising a plurality of at least two integral cutting protrusions each having at least one said integrally formed cutting edge thereon, such that at least a section of said exterior surface of said arrowhead body that is not comprised of an integral cutting protrusion extends between at least a first integral cutting protrusion and a second integral cutting protrusion.

52. An arrowhead as recited in claim 47 wherein a line parallel to said central longitudinal axis intersects said blade slot and said integral cutting edge.

53. An arrowhead as recited in claim 52 wherein at least a linear section of said blade cutting edge and at least a linear section of said integral cutting edge are in coplanar alignment with each other.

54. An arrowhead as recited in claim 47 wherein a plane perpendicular to said central longitudinal axis intersects said blade slot and said integral cutting edge.

55. An arrowhead as recited in claim 47 wherein at least a section of said integral cutting protrusion extends forward of said blade slot.

56. An arrowhead as recited in claim 47 further comprising an integral arrowhead tip.

57. An arrowhead as recited in claim 56 wherein said arrowhead tip has an integrally formed cutting edge.

58. An arrowhead as recited in claim 57 wherein at least a linear section of said integrally formed cutting edge of said arrowhead tip is substantially in coplanar alignment with at least a linear section of said integrally formed cutting edge of said arrowhead body.

59. An arrowhead as recited in claim 47 wherein said blade slot is substantially non-radially aligned with said central longitudinal axis of said arrowhead body.

60. An arrowhead as recited in claim 59 wherein said cutting blade is a pivotal blade hingedly connected within said blade slot.

35. An arrowhead comprising:

(a) an arrowhead body having a central longitudinal axis;

(b) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body; and

(c) a fixed-blade attached to said arrowhead body comprising;

(i) an edge extending peripherally thereabout; and

(ii) an exterior side face, wherein a plane coplanar with at least a section of said exterior side face is not parallel to at least another section of said exterior side face.

36. An arrowhead as recited in claim 35 wherein said fixed-blade has a bent portion such that blade material of said fixed-blade is capable of being simultaneously housed within a pair of spaced apart blade slots that communicate with each other.

37. An arrowhead as recited in claim 36 wherein said blade slots communicate with each other at least substantially near said central longitudinal axis.

38. An arrowhead as recited in claim 36 wherein said spaced apart blade slots are off set from each other by substantially 120 degrees.

39. An arrowhead as recited in claim 36 further comprising an arrowhead tip attachable to said arrowhead body so that when attached thereto a plane perpendicular to said central longitudinal axis intersects at least a section of both said fixed-blade and said arrowhead tip.

40. An arrowhead as recited in claim 35 wherein said arrowhead body further comprises a hollow internally bound cylinder having a blade slot communicating therewith, said fixed-blade having a bent portion such that when said fixed-blade is attached to said arrowhead body within said blade slot at least a section of said bent portion is housed within said internal cylinder.

41. An arrowhead as recited in claim 40 further comprising a shaft insertable within said cylinder when said fixed-blade is attached to said arrowhead body, said shaft being disposed within said cylinder so that at least a section of said bent blade portion of said fixed-blade is located between said shaft and an internal wall surface of said cylinder.

42. An arrowhead as recited in claim 41 wherein said shaft is integral with a removably attachable arrowhead tip.

61. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade communicate with each other.

62. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade communicate with each other so as to be substantially the same blade slot.

63. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade are substantially different blade slots wherein a line parallel to said central longitudinal axis intersects both said slots.

64. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade are substantially different blade slots wherein each said slot comprises a bounding sidewall, said sidewall of each said slot being substantially non parallel to each other.

65. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade are substantially different blade slots wherein each said slot comprises a bounding sidewall, said sidewall of each said slot being substantially non parallel to each other and at least one sidewall of the slot housing said fixed-blade is not perpendicular to at least one sidewall of the slot housing said pivotal blade.

66. An arrowhead comprising:

(a) a forward leading end;

(b) an arrowhead body having a central longitudinal axis;

(c) a pivotal blade connected to said arrowhead body so as to be enabled to rotate relative to said arrowhead body, said pivotal blade having a cutting edge which extends to a forward terminus when said arrowhead is in a penetrating configuration; and

(d) a fixed blade having a cutting edge, said fixed blade cutting edge comprising;

(i) a forward terminus; and

(ii) a rearward terminus, wherein when said arrowhead is in said penetrating configuration said forward terminus of said fixed-blade cutting edge is located rearward of said forward leading end of said arrowhead and said rearward terminus of said fixed-blade cutting edge is located forward of said forward terminus of said pivotal blade cutting edge, said pivotal blade and said fixed-blade each being housed within a blade slot such that the blade slot that houses said fixed-blade and the blade slot that houses said pivotal blade are substantially different blade slots wherein said cutting edge of said pivotal blade is substantially in coplanar alignment with said cutting edge of said fixed-blade when said arrowhead is in said penetrating configuration.