Dual stirrup crossbow

• US 20130061836A1
• Filed: 07/27/2011
• Published: 03/14/2013
• Est. Priority Date: 08/02/2010
• Status: Active Grant

• Current Assignee: James Jay Kempf
• Original Assignee: James Jay Kempf
• Inventors: Kempf, James Jay
• Granted Patent: US 8,720,424 B2
• Time in Patent Office: Days
• US Class Current: 124/25
• CPC Class Codes: F41B 5/10 Compound bows compound crossbows F41B5/123
• CPC Class Codes: F41B 5/12 Crossbows
• CPC Class Codes: F41B 5/1469 Bow-string drawing or releasing devices F41B5/1473 takes precedence

Abstract

The present invention pertains to the field of archery devices, specifically to devices known as crossbows. Historically. crossbows have had a single foot stirrup, centered at the front end of the crossbow, to assist the user in the cocking procedure. Though functional, a single stirrup does not allow the user to naturally center the crossbow with his body while cocking the crossbow, which may cause miss-alignment of the bow string, as well as possible loss of balance and fatigue. By placing a stirrup on both sides of the barrel of the crossbow, the user may use his left foot, right foot, or both feet to cock the crossbow, and the crossbow is automatically centered to the users body.

Claims

1. A shooting bow comprising

a) a riser frame

b) a first limb assembly

c) a second limb assembly

d) wherein said first limb assembly and said second limb assembly are coupled to said riser frame in a manner in which said first limb assembly and said second limb assembly extend outwardly from one another in a direction away from each other.

e) a first string guide

f) means for journaling said first string guide to said first limb assembly

g) a second string guide

h) means for journaling second string guide to said second limb assembly

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 defines a first line

m) wherein when second said string is in an un-cocked 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.

o) a crossbow stock, coupled to said second string retaining means

p) means for coupling said crossbow stock to said riser frame

2. The shooting bow of claim 1, further comprising a projectile path, the center line of said projectile path is a line from the center of said second string retaining means to a point forward the center line of said riser frame.

3. The shooting bow of claim 2 wherein said riser frame has an opening on a first side of said center line, and an opening on a second side of said center line, where said openings are of a size and shape of a foot stirrup, wherein said first side opening and said second side opening within said riser frame create a dual foot stirrup.

4. The shooting bow of claim 3 wherein said dual foot stirrup portion of said riser frame is located such that when said first limb assembly and said second limb assembly are coupled to said riser frame, said second string is located at least partially rearward of said dual stirrup portion of said riser frame

5. The shooting bow of claim 4 wherein said crossbow stock is coupled to said riser frame by an extension of said riser frame to said crossbow stock

21. A crossbow of claim 5 where the crossbow stock and riser frame are injection molded and integrated as one piece.

6. A shooting bow comprising

a) a riser frame

b) a first limb assembly

c) a second limb assembly

d) wherein said first limb assembly and said second limb assembly are coupled to said riser frame in a manner in which said first limb assembly and said second limb assembly extend outwardly from one another in a direction away from each other.

e) a first string guide

f) means for journaling said first string guide to said first limb assembly

g) a second string guide

h) means for journaling second string guide to said second limb assembly

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 rearward of said first journaling means to a second point on said second string guide rearward 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 defines a first line

m) wherein when second said string is in an un-cocked position, said second string defines a second line, wherein said second 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.

o) a crossbow stock, coupled to said second string retaining means

p) means for coupling said crossbow stock to said riser frame

7. The shooting bow of claim 6, further comprising a projectile path, the center line of said projectile path is a line from the center of said second string retaining means to a point forward the center line of said riser frame.

8. The shooting bow of claim 7 wherein said riser frame has an opening on a first side of said center line, and an opening on a second side of said center line, where said openings are of a size and shape of a foot stirrup, wherein said first side opening and said second side opening within said riser frame create a dual foot stirrup.

9. The shooting bow of claim 8 wherein said dual foot stirrup portion of said riser frame is located such that when said first limb assembly and said second limb assembly are coupled to said riser frame, said second string is located at least partially rearward of said dual stirrup portion of said riser frame.

10. The shooting bow of claim 9 wherein said crossbow stock is coupled to said riser frame by an extension of said riser frame to said crossbow stock.

20. The crossbow of claim 9 where the crossbow stock and riser frame are injection molded and integrated as one piece.

11. A shooting bow comprising

a) a riser frame

b) a first limb

c) a second limb

d) wherein said first limb and said second limb are coupled to said riser frame in a manner in which said first limb and said second limb extend outwardly from one another in a direction away from each other.

e) a first string coupled to said first limb and to said second limb

f) wherein said first string coupling location and said second string coupling location defines a first line

g) means for retaining said first string in a cocked position

h) trigger means for causing said retaining means to release said string.

i) a crossbow stock, coupled to said first string retaining means

j) means for coupling said crossbow stock to said riser frame

12. The shooting bow of claim 11, further comprising a projectile path, the center line of said projectile path is a line from the center of said second string retaining means to a point forward the center line of said riser frame.

13. The shooting bow of claim 12 wherein said riser frame has an opening on a first side of said center line, and an opening on a second side of said center line, where said openings are of a size and shape of a foot stirrup, wherein said first side opening and said second side opening within said riser frame create a dual foot stirrup.

14. The shooting bow of claim 13 wherein said dual foot stirrup portion of said riser frame is located such that where said first limb and said second limb are coupled to said riser frame, said first string is located rearward of said dual stirrup portion of said riser frame.

15. A dual stirrup crossbow riser frame machined from a forging of light weight, strong material

16. A dual stirrup crossbow riser frame made from a die cast light weight, strong material

17. A dual stirrup crossbow riser frame machined from a billet of light weight, strong material

18. A dual stirrup crossbow riser frame machined from an extrusion of light weight, strong material

19. A dual stirrup crossbow riser frame made by compression molding light weight, strong composite materials