Paintball gun with Coanda effect

• US 6,863,060 B2
• Filed: 10/30/2003
• Issued: 03/08/2005
• Est. Priority Date: 11/06/2002
• Status: Expired due to Fees

• Current Assignee: Robert Martinez
• Original Assignee: Robert Martinez
• Inventors: Martinez, Robert
• Primary Examiner(s): Luu, Teri P.
• Assistant Examiner(s): LOFDAHL, JORDAN M
• Application Number:
  US10/695,859
• Publication Number:
  US 20040089281A1
• Time in Patent Office: 495 Days
• Field of Search: 124/73, 124/71, 124/56
• US Class Current: 124/73
• CPC Class Codes: F41B 11/721 for controlling gas pressure for both firing the projectile and for loading or feeding

Abstract

A paintball gun utilizing the Coanda effect in firing and/or loading paintballs. A Coanda chamber located in the bolt, feed tube, or barrel propels, loads, or spins a paintball. The Coanda chambers, which can be used in any combination include a port for receiving air, an inner cell, an outer cell and an annular ring defining a passageway between the cells. The chamber located in the bolt for propelling the ball includes walls in the outer cell. The air follows the sloped walls and hits the ball at its periphery, eliminating distortion and breakage of the ball. The chamber located in the feed tube forces the ball into the barrel and creates a vacuum to eliminate the ball blowing back up the feed tube. The annular ring in the chamber in the barrel is partially blocked, directing the air to put a spin on the ball.

Claims

1. A device having a Coanda chamber comprising:

a paintball gun;

said Coanda chamber located in a portion of said gun and including;

a port for receiving air;

an inner cell into which the air is received through said port;

an annular ring defining a passageway for the air to flow; and

an outer cell into which the air flows for urging a paintball.

2. The device of claim 1 wherein said gun includes a bolt and said chamber is located in said bolt.

3. The device of claim 2 wherein said outer cell of said chamber includes sloping walls such that the air flow is against the walls and will contact a periphery of a paint ball.

4. The device of claim 1 wherein said gun includes a feed tube and said chamber is in said feed tube.

5. The device of claim 1 wherein said chamber is in a barrel portion of said gun.

6. The device of claim 5 wherein a portion of said annular ring is blocked off so air flows in only a portion of said outer cell, whereby a spin is created on a paintball.

7. A paintball gun comprising a bolt, a barrel, and a feed tube, each of said bolt, barrel, and feed tube including a Coanda chamber for propelling, loading, or spinning a paintball, wherein each said Coanda chamber includes:

a port for receiving air;

an inner cell into which the air is received through said port;

an annular ring defining a passageway for the air to flow; and

an outer cell into which the air flows for urging a paintball.

8. The paintball gun of claim 7 wherein said outer cell of said chamber in said bolt includes sloping walls such that the air flow is against the walls and will contact a periphery of a paint ball.

9. The paintball gun of claim 7 wherein a portion of said annular ring of said chamber in said barrel is blocked off so air flows in only a portion of said outer cell, whereby a spin is created on a paintball.