Crossbow

• US 7,363,921 B2
• Filed: 01/05/2005
• Issued: 04/29/2008
• Est. Priority Date: 01/05/2005
• Status: Active Grant

• Current Assignee: J & S R.D.T. Archery
• Original Assignee: J & S R.D.T. Archery
• Inventors: Kempf, James J.
• Primary Examiner(s): Ricci; John A.
• Application Number:
  US11/029,870
• Publication Number:
  US 20060144380A1
• Time in Patent Office: 1,210 Days
• Field of Search: 124/25, 124/25.6
• US Class Current: 124/25
• CPC Class Codes: F41B 5/105 Cams or pulleys for compound bows
• CPC Class Codes: F41B 5/123 Compound crossbows
• CPC Class Codes: F41B 5/1469 Bow-string drawing or releasing devices F41B5/1473 takes precedence

Abstract

A crossbow having an increased powerstroke and reduced noise. The powerstroke is increased by inverting the limb orientation from the standard crossbow arrangement and locating string guides at least partially forward and rearward of the ends of the limbs. The bowstring is drawn from the tops of the string guides to maximize the powerstroke, reducing noise and increasing the retained and delivered energy over existing crossbows.

Claims

1. A shooting bow comprising:

(a) a frame;

(b) a first limb;

(c) a second limb;

(d) wherein said first limb and said second limb are coupled to said frame in a manner in which said first limb and said second limb extend outwardly away from one another in a direction of shooting;

(e) a first string guide;

(f) means for journaling said first string guide to said first limb;

(g) a second string guide;

(h) means for journaling said second string guide to said second limb;

(i) a first string coupled to said first string guide and to said second string guide;

(j) a second string coupled from a first point on said first string guide forward of said first journaling means to a second point on said second string guide forward of said second journaling means;

(k) means for retaining said second string in a cocked position;

(l) wherein said first string guide journaling means and said second string guide journaling means define a first line;

(m) wherein when said second string is in an uncocked position, said second string defines a second line, wherein said first line is located between said retaining means and said second line; and

(n) trigger means for causing said retaining means to release said second string.

2. The shooting bow of claim 1, wherein said first string is integrally formed with said second string.

3. The shooting bow of claim 1, further comprising a third string coupled to said first string guide and said second string guide.

4. The shooting bow of claim 1, further comprising a projectile track provided on said frame.

5. The shooting bow of claim 4, wherein said retaining means is located within five centimeters of one end of said projectile track.

6. The shooting bow of claim 1, wherein said first string guide is journaled directly to said first limb.

7. The shooting bow of claim 1, wherein said first limb and said second limb are coupled to said frame by a riser.

8. The shooting bow of claim 1, wherein said first string guide is a cam.

9. The shooting bow of claim 8, wherein said second string guide is a pulley.

10. The shooting bow of claim 1, further comprising a projectile track provided on said frame, wherein said projectile track is at least forty centimeters in length.

11. A shooting bow comprising:

(a) a frame;

(b) a first limb;

(c) a second limb;

(d) a first string guide;

(e) means for journaling said first string guide to said first limb in a manner in which at least a portion of said first string guide extends at least partially forward of, and through, said first limb;

(f) a second string guide;

(g) means for journaling said second string guide to said second limb in a manner in which at least a portion of said second string guide extends forward of, and through, said second limb;

(h) a string coupled from a forward portion of said first string guide to a forward portion of said second string guide;

(i) means for retaining said string in a cocked position;

(j) wherein when said siring is in an uncocked position, said first string guide journaling means and said second string guide journaling means define a line located between said string and said retaining means; and

(k) a projectile track provided on said frame, wherein said retaining means is provided within five centimeters of one end of said track.