Shooting crossbow

• US 4,766,874 A
• Filed: 05/11/1987
• Issued: 08/30/1988
• Est. Priority Date: 05/11/1987
• Status: Expired due to Fees

• Current Assignee: Jim Z. Nishioka
• Original Assignee: Jim Z. Nishioka
• Inventors: Nishioka, Jim Z.
• Primary Examiner(s): Pinkham, Richard C.
• Assistant Examiner(s): Graham, Mark S.
• Application Number:
  US07/048,245
• Time in Patent Office: 477 Days
• Field of Search: 124/25, 124/23 R, 124/88, 124/DIG. 1, 124/22, 124/24 R
• US Class Current: 124/25
• CPC Class Codes: F41B 5/12 Crossbows

Abstract

A shooting bow includes a bowstring, an elongated frame extending longitudinally in a shooting direction of the bowstring, a pair of arms for providing a tension for the bow, and a pair of rotatable bowstring guide members on the pair of arms, respectively. The bowstring includes a main span extending between the guide members and a pair of end spans or cables extending from the guide members, respectively. The bow also includes a bowstring catch and trigger mechanism positioned on the frame for holding the bowstring in a drawn position and for releasing it to propel a projectile. Each of the arms includes a rigid portion and a flexible portion respectively. The flexible portions extend in a forwardly direction. A pair of pulleys on the frame positions the bowstring end spans forwardly of the guide member.

Claims

1. A shooting bow comprising:

a bowstring including a main span and a pair of end spans,

an elongated frame extending longitudinally in a shooting direction of the bowstring main span,

a pair of arms connected to the frame, the arms each comprising a rigid butt portion and a flexible portion, respectively, the flexible portions providing a tension for the bowstring,

a pair of rotatable bowstring guide members on the flexible portions of the arms, respectively,

said bowstring main span extending between the rotatable bowstring guide members and the pair of bowstring end spans extending from the pair of rotatable bowstring guide members, respectively,

a bowstring catch and trigger mechanism on the frame for holding the bowstring in a drawn position and for releasing it,

said pair of flexible portions of the arms extending in a forwardly direction,

means on the bow for engaging the bowstring end spans, said means being positioned forwardly of the rotatable guide members so that when the bowstring main span is drawn rearwardly said means will cause the end spans to apply an inwardly and a forwardly tension to the flexible portions of the arms.

2. The shooting bow of claim 1 wherein said means includes a pair of rotatable pulleys positioned on the frame for engaging the pair of bowstring end spans, respectively, said pair of pulleys being positioned forwardly of the forwardly extending flexible portions of the bow arms.

3. The shooting bow of claim 2 wherein said pair of pulleys rotate independently of each other, said pair of pulleys being supported on a common shaft.

4. The shooting bow of claim 3 wherein said pulleys rotate in opposite directions during a drawing movement of the bowstring main span.

5. A shooting bow comprising:

a bowstring including a main span and a pair of end spans,

an elongated frame extending longitudinally in a shooting direction of the bowstring main span,

a pair of arms connected to the frame, the arms each comprising a rigid butt portion and a flexible portion, respectively,

said flexible portions extending forwardly from the rigid butt portions, respectively,

a pair of rotatable bowstring guide members on the flexible portions of the arms, respectively,

said bowstring main span extending between the rotatable bowstring guide members and the pair of bowstring end spans extending from the pair of rotatable bowstring guide members, respectively,

a bowstring catch and trigger mechanism on the frame for holding the bowstring in a drawn position and for releasing it,

said elongated frame including elongated opposite sides,

said pair of rigid butt portions of the arms being positioned on the opposite sides of the frame, respectively, and extending in a forwardly direction,

said bow also including connecting means for operatively connecting the forwardly extending butt portions of the arms to the opposite sides of the elongated frame, respectively,

said connecting means also for positioning said forwardly extending butt portions substantially parallel to the elongated sides of the frame,

said rigid butt portions being elongated members integrally connected to the flexible portions, said elongated member butt portions being positioned substantially adjacent to and substantially parallel to the elongated frame and operatively connected thereto.

6. The shooting bow of claim 5 wherein said connecting means extends transversely through at least one of the elongated member butt portions of the arms to connect the latter to the frame.

7. The shooting bow of claim 5 wherein said connecting means connects the pair of elongated member butt portions of the arms directly to the opposite sides of the frame, respectively,

8. The shooting bow of claim 5 wherein said connecting means includes multiple elongated elements extending through both the elongated member butt portions of the arms and also extending transversely into the elongated sides of the frame.

9. A shooting bow comprising:

a bowstring including a main span and a pair of end spans,

an elongated frame extending longitudinally in a shooting direction of the bowstring main span,

a pair of arms connected to the frame, the arms each comprising a rigid butt portion and a flexible portion, respectively, the flexible portions providing a tension for the bowstring,

a pair of rotatable bowstring guide members on the flexible portions of the arms, respectively,

said bowstring main span extending between the rotatable bowstring guide members and the pair of bowstring end spans extending from the pair of rotatable bowstring guide members, respectively,

a bowstring catch and trigger mechanism on the frame for holding the bowstring in a drawn position and for releasing it,

said elongated frame including elongated opposite sides,

said pair of rigid butt portions of the arms being positioned on the opposite sides of the frame, respectively, and extending in a forwardly direction substantially parallel to the frame,

said pair of rigid butt portions of the arms being secured to the opposite sides of the frame, respectively,

said bow including projectile support means for engaging and slidably supporting a projectile,

said pair of flexible portions and pair of rigid butt portions of the arms each having a top side and a bottom side, respectively,

each of said top sides of said flexible portions being positioned above said projectile support means,

each of said top sides of said forwardly extending rigid butt portions being positioned below the bowstring catch.