Patent Publication Number: US-2009223501-A1

Title: Paintball gun with a pressure gauge device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a paintball gun with a pressure gauge device, and more particularly to a pressure gauge mounted behind a triggering block in a barrel of the paintball gun so that the user may constantly understand the air pressure in the paintball gun to supply air when necessary. 
     2. Description of the Prior Art 
     Air pressure is a major part for a paintball gun to shoot a paint bullet. In order to know the air pressure in the paintball gun, a conventional paintball gun only measures the air pressure of an air cylinder. Another conventional paintball gun is to mount a pressure gauge to the handle or the front of the paintball gun, and then is sealed with glue to prevent leakage. However, the mounting of the pressure gauge may hinder the user to grasp the handle, and is unable to mount or dismount quickly. 
     A later design was delivered as shown in  FIG. 6 , which comprises a fixing tube A, a switch rod B, a pushing rod C, a swivel tube D, and a pressure gauge E. The fixing tube A is connected to a barrel. The barrel is provided with an air passage F and a one-way valve G at one side of the barrel. The fixing tube A interconnects with the air passage F. The pushing rod C is located in the fixing tube A and corresponds in position to the one-way valve G. The switch rod B is mourned to the fixing tube A and engages with the pushing rod C to push the one-way valve G to interconnect with the air passage F. The swivel tube D is connected with the pressure gauge E and fits onto the fixing tube A. The swivel tube D and the fixing tube A are interconnected with each other. The pressure gauge E is adapted to measure the air pressure in the air passage F. 
     Although this design has solved the above-mentioned problems, it still has some shortcomings such as: 
     1. The air pressure device has to be purchased separately, which increases the cost. 
     2. The pressure gauge bulges out of the paintball gun, which may interrupt the user. 
     3. The pressure gauge is far away from the user, which is not easy to read. 
     SUMMARY OF THE INVENTION 
     According to the present invention, there is provided a paintball gun with a pressure gauge device comprising:
     a rear cap having a first end and a second end, said first end being formed with a compartment, said second end being provided with a piston block, a first air sealing ring being provided on said piston block, a second air sealing ring being provided on said rear cap, a first air passage being formed between said first air sealing ring and said second air sealing ring;   a pressure gauge accommodated in said compartment of said rear cap and comprising a guiding rod, two sealing rings being provided on said guiding rod, a second air passage being formed between said two sealing rings, said second air passage interconnecting with said first air passage; and   a barrel comprising a triggering block therein, said barrel having a rear end to connect with said rear cap, said triggering block engaging with said rear cap, said triggering block having a third air passage at a rear end thereof, said third air passage interconnecting with said first air passage.   

     Preferably, said rear cap further comprises a canopy, said canopy being fixed to said rear cap. 
     Preferably, an air room is formed between said triggering block and said barrel, said air room interconnecting with said third air passage of said triggering block. 
     Preferably, a buffering ring is provided on said rear cap for sealing with said triggering block. 
     Preferably, said pressure gauge has an engaging groove for connection of a lid. 
     Preferably, said lid has a first through hole. 
     Preferably, said canopy has a second through hole corresponding to said first through hole of said lid of said pressure gauge. 
     Preferably, said canopy is in a taper shape. 
     It is the primary object of the present invention to provide a paintball gun with a pressure gauge device, which is easy to read the air pressure in the paintball gun. 
     It is another object of the present invention to provide a paintball gun with a pressure gauge device, which provides a pressure gauge installed on the paintball gun directly without any other requirement for reading the air pressure in the paintball gun. 
     It is a further object of the present invention to provide a paintball gun with a pressure gauge device, which is located at the rear of the paintball gun to facilitate the user to read the air pressure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of the present invention; 
         FIG. 2  is a cross-sectional view of the present invention; 
         FIG. 3  is an enlarged view of  FIG. 2 ; 
         FIG. 4  is a rear view of the present invention; 
         FIG. 5  is the rear view of the present invention in operation; and 
         FIG. 6  is a side cross-sectional view of the prior art. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As shown in  FIGS. 1 and 2 , a preferred embodiment of the present invention comprises a rear cap  1 , a pressure gauge  2 , a canopy  3 , a barrel  4  and a triggering block  5 . 
     The rear cap  1  has a first end and a second end. The first end is formed with a compartment  11  adapted to receive the pressure gauge  2 . The second end is provided with a piston block  12 . A first air sealing ring  121  is provided on the piston block  12 . A second air sealing ring  14  is provided on the rear cap  1 . A first air passage  13  is formed between the first air sealing ring  121  and the second air sealing ring  14 , as shown in  FIG. 3 . The rear cap  1  further comprises a buffering ring  15  corresponding to the triggering block  5  to buffer the back fire of the triggering block  5 . A first threaded section  16  and a second threaded section  17  are provided on the rear cap  1 . The first threaded section  16  is for the connection of the barrel  4 , while the second threaded section  7  is for the connection of the canopy  3 . 
     The pressure gauge  2  has a first end and a second end. A guiding rod  21  is provided at the first end of the pressure gauge  2 . Two sealing rings  22  are provided on the guiding rod  21 . A second air passage  23  is formed between the two sealing rings  22 . The pressure gauge  2  is formed with an engaging groove  24  around an inner edge of the second end of the pressure gauge  2  for a lid  25  to be secured threat. The lid  25  has a first through hole  251  at a center portion of the lid  25 . 
     The canopy  3  is in a taper shape and has a threaded hole  32  corresponding to the second threaded section  17  of the rear cap  1  for connection purpose. The canopy  3  further has a second through hole  31  at a center portion of the canopy  3 , corresponding to the first through hole  251  of the lid  25  of the pressure gauge  2 . 
     The barrel  4  is formed with a third threaded section  41  at a rear end thereof adapted to connect with the rear cap  1 . The triggering block  5  is located in the barrel  4 . The triggering block  5  engages with the rear cp  1 . An air room  42  is formed between the barrel  4  and the triggering block  5 . 
     The triggering block  5  has a third air passage  51  at a rear end thereof. The third air passage  51  interconnects with the first air passage  13  of the rear cap  1 . 
     To assemble the present invention, as shown in  FIGS. 2 and 3 , the guiding rod  21  of the pressure gauge  2  is inserted into the compartment  11  of the rear cap  1 . The canopy  3  is screwed to the second thread section  17 . The rear cap  1  is connected to the rear end of the barrel  4 . The triggering block  5  in the barrel  4  engages with the rear cap  1 . The second air passage  23  of the pressure gauge  2 , the first air passage  13  of the rear cap  1 , the third air passage  51  of the triggering block  5 , and the air room  42  formed between the barrel  4  and the triggering block  5  are interconnected. 
     To turn the pressure gauge  2  towards a different direction, as shown in  FIGS. 4 and 5 , a tool is inserted through the second through hole  31  of the canopy  3  and the first through hole  251  of the lid  25  to turn the pressure gauge  2  in a desired direction. 
     Furthermore, the canopy  3  may be welded or glued to the rear cap  1  after screwed together with the second threaded section  17  of the rear cap  1 , so that when it is necessary to disassemble the present invention, the canopy  3  will be rotated to loosen the rear cap  1  at the same time.