Paint ball gun

• US 6,553,983 B1
• Filed: 03/04/2002
• Issued: 04/29/2003
• Est. Priority Date: 03/04/2002
• Status: Expired due to Fees

• Current Assignee: Kao-Ming Li
• Original Assignee: Kao-Ming Li
• Inventors: Li, Kao-Ming
• Primary Examiner(s): Jordan, Charles T.
• Assistant Examiner(s): Zerr, John W.
• Application Number:
  US10/086,385
• Time in Patent Office: 421 Days
• Field of Search: 124/60, 124/73, 124/74, 124/76, 124/72
• 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 paint ball gun comprises a receiver including an upper compartment and a lower compartment. A bolt is slidably mounted in the upper compartment and includes a chamber in a front end thereof for receiving a bolt pin. A gas control device is mounted in the lower compartment and includes a valve assembly, a striker, and a striker spring, the bolt and the striker being connected together to move jointly. The valve assembly comprises a positioning sleeve secured in the lower compartment, a valve pin, a valve spring mounted in the positioning sleeve, a seal member mounted to a front end of the positioning sleeve, and a cap secured to an end of the valve pin. The valve pin extends through the valve spring and located in the positioning sleeve. The valve pin includes a rear end extending beyond a hole in a rear end of the positioning sleeve.

Claims

1. A paint ball gun comprising:

a receiver (10) including an upper compartment (11) and a lower compartment (12) parallel to the upper compartment (11);

a barrel (14) attached to a front end of the upper compartment (11);

a ball-feeding tube (13) attached to a side of the receiver (10) for feeding a paint ball (60) into the upper compartment (11);

a bolt (15) slidably mounted in the upper compartment (11) and including a chamber (151) in a front end thereof;

a bolt pin (30) mounted in the chamber (151) of the bolt (15);

a gas control device (16) mounted in the lower compartment (12) and including a front striker plug (161), a valve assembly (20), a striker (162), a striker spring (163), and a rear striker plug (164), the bolt (15) and the striker (162) being connected together to move jointly;

an orifice (19) defined between the upper compartment (11) and the lower compartment (12); and

a trigger (41) operably connected to the striker spring (63);

the valve assembly (20) comprising a positioning sleeve (21) secured in the lower compartment (11), a valve pin (22), a valve spring (23) mounted in the positioning sleeve (21), a seal member (24), and a cap (26), the valve pin (22) extending through the valve spring (23) and located in the positioning sleeve (21), the valve pin (22) including a rear end extending beyond a hole (213) in a rear end of the positioning sleeve (21), the positioning sleeve (21) including a front end to which the seal member (24) is mounted, the valve pin (22) including a front end extending beyond the seal member (24) with the cap (26) securely attached to the front end of the valve pin (22) to move therewith;

the valve pin (22) being actuated forward by the striker (162) when the trigger (41) is pulled beyond a predetermined position, the cap (26) being moved away from the seal member (24) to allow gas from the front striker plug (161) to enter the positioning sleeve (21), a portion of the gas entering the chamber (151) of the bolt (15) through the orifice (19) for firing the paint ball (60) through the barrel (14), another portion of the gas exiting the hole (213) in the rear end of the positioning sleeve (21) to move the striker (162) rearward;

the positioning sleeve (21) including an inner threading (211) in a front end thereof and a vent (212) in an outer periphery thereof, the front end of the valve pin (22) including an outer threading (223), the rear end of the valve pin (22) including a beveled section with a beveled face (221) for providing a passageway to the vent (212), a stop (222) being formed on the beveled section, the seal member (24) including a flange (242) on an inner periphery of a front end thereof, the seal member (24) further including a threaded section (241) on an outer periphery thereof for engaging with the inner threading (211) of the positioning sleeve (21), the valve spring (23) including a rear end attached to the stop (222) and a front end attached to the flange (242) of the seal member (24), a washer (25) being mounted around the front end of the valve pin (21) and located in the cap (26), the cap (26) including an inner threading (261) for engaging with the outer threading (223) of the valve pin (22).

2. The paint ball gun as claimed in claim 1, wherein the bolt pin (30) includes a first end and a reduced second end, a conic portion (34) being formed between the first end and the reduced second end of the bolt pin (30), a concave face (31) being defined in the first end of the bolt pin (30), the reduced second end of the bolt pin (30) being securely engaged in the chamber (151) of the bolt (15), at least one longitudinal passageway (33) being defined between the conic portion (34) and the concave face (31) of the bolt pin (30).