Broadhead arrow with axial alignment device

• US 4,621,817 A
• Filed: 12/11/1985
• Issued: 11/11/1986
• Est. Priority Date: 12/11/1985
• Status: Expired due to Term

• Current Assignee: Muzzy Products Corporation
• Original Assignee: John Musacchia
• Inventors: Musacchia, John
• Primary Examiner(s): SHAPIRO, PAUL
• Application Number:
  US06/807,598
• Time in Patent Office: 335 Days
• Field of Search: 273/416,419-422, 403/86
• US Class Current: 473/583
• CPC Class Codes: F42B 6/08 Arrow heads; Harpoon heads
• CPC Class Codes: Y10T 403/32278 Members rotatable about oblique axes

Abstract

An archery arrow includes an arrowhead removably attachable to a shaft with an alignment member disposed therebetween. The alignment member comprises a washer-like element having opposite faces disposed in divergent planes. By rotating the alignment member prior to tightening the arrowhead to the shaft, the axial disposition of the arrowhead relative the shaft may be altered to obtain a balanced arrow free of any wobble when spin tested about the point of the arrowhead.

Claims

1. An arrow including, a shaft provided with a longitudinally extending axis and having a forward portion at one end, an arrowhead provided with a longitudinally extending axis and having a blade and a rearwardly axially extending mounting stud removably attachable to said shaft forward portion, connection means within said shaft forward portion adapted to receive said arrowhead stud, said stud when engaging said shaft connection means allowing of limited radial displacement of said arrowhead relative the longitudinal axis of said shaft, an alignment member having cam means and substantially surrounding said arrowhead stud intermediate said blade and said shaft forward portion whereby, radial displacement of said alignment member alters the relative disposition between said arrowhead longitudinal axis and shaft longitudinal axis to provide a properly balanced arrow about said axes.

2. An arrow according to claim 1 wherein, said alignment member includes a washer element and said cam means comprises opposite faces on said washer element disposed in planes non-parallel to one another.

3. An arrow according to claim 2 wherein, said washer element comprises a radially split lock washer.

4. An arrow according to claim 2 including, a knurled external periphery on said washer element.

5. An arrow according to claim 1 including, abutment means on said stud intermediate said shaft forward portion and arrowhead blade, said shaft connection means comprising a threaded bore whereby, tightening of said stud within said bore captively engages said alignment member with said abutment means bearing upon said cam means.

6. An arrow according to claim 1 wherein, said connection means comprises an insert having a threaded bore axially disposed within said shaft forward portion.

7. An arrow according to claim 1 wherein, said shaft comprises tubular stock and said connection means comprises an insert having a threaded bore axially disposed within said shaft foward portion.

8. An arrow according to claim 1 wherein, said shaft is of solid stock and said connection means comprises a threaded bore.

9. An arrow according to claim 1 including, reference means on said alignment member depicting the angular position thereof relative said arrow shaft.

10. An arrow according to claim 9 wherein, said reference means includes a radially projecting tab on said alignment member.

11. An arrow according to claim 9 wherein, said reference means includes indicia on said alignment.

12. An arrow according to claim 9 including, additional reference means adjacent said shaft forward portion.

13. An arrow according to claim 12 wherein, said additional reference means comprises indicia.