Mechanical guns and projectors – Fluid pressure – With control for discharge of fluid pressure
Reexamination Certificate
2001-03-27
2003-01-07
Jordan, Charles T. (Department: 3644)
Mechanical guns and projectors
Fluid pressure
With control for discharge of fluid pressure
C124S076000, C124S048000
Reexamination Certificate
active
06502568
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a model gun in the type of revolver, and more particularly, is directed to improvements in a model gun of the revolver type, which has a cylindrical member containing a plurality of bullet holding chambers which are arranged around a central axis of the cylindrical member at predetermined angular intervals and each of which holds a sham bullet therein, and provided on a frame member between a barrel fixed to the frame member and a hammer attached rotatably to the frame member. The bullet holding chambers are revolved around the central axis of the cylindrical member in accordance with movements of a trigger so that one of the bullet holding chambers is positioned to face closely a rear end portion of the barrel and the sham bullet in the bullet holding chamber facing the rear end portion of the barrel structure is able to be shot through the barrel with gas pressure.
2. Description of the Prior Art
A model gun by which a sham bullet made of plastics or the like is shot with gas pressure is made to imitate a real gun in not only its color and shape but also its apparent operations. As one of these model guns, there has been proposed such a type as to be made to imitate a real gun of the revolver type, namely, a model gun in the type of revolver. In the model gun of the revolver type, a cylindrical movable member which is provided between a barrel and a hammer and in which a plurality of bullet holding chambers each holding a sham bullet therein are arranged around a central axis of the cylindrical movable member at predetermined angular intervals is revolved on the central axis thereof in accordance with movements of a trigger so that one of the bullet holding chambers is positioned to face closely a rear end portion of the barrel structure. The sham bullets put respectively in the bullet holding chambers which are provided in the cylindrical movable member are successively shot one by one with gas pressure which acts on the sham bullet in the bullet holding chamber in synchronism with the revolution of the cylindrical movable member on the central axis thereof.
As for the model gun of the revolver type in which gas pressure is utilized for shooting, it has been proposed to make such an arrangement that a cylindrical movable member which is provided with a plurality of pits arranged at predetermined intervals, into each of which a cartridge containing sham bullets is inserted, so as to form a magazine, is positioned between a barrel structure and a hammer, as shown in, for example, Japanese utility model publication No.07-29435. According to the arrangement thus proposed, a plurality of bullet holding chambers in each of which the sham bullet is put are formed substantially with the cartridges inserted into the pits, respectively, in the cylindrical movable member. The sham bullet put in the bullet holding chamber is shot with air pressure (gas pressure) supplied to the bullet holding chamber through a relatively slender and long tube from an air pump (a pressure accumulating chamber) provided in a grip.
It has been also proposed to make another arrangement that a cylindrical member in which a pressure accumulating chamber which is charged with liquefied gas, a gas leading passage extending from the pressure accumulating chamber, a gas releasing valve, and a plurality of bullet holding chambers in each of which a sham bullet is put and which are arranged at predetermined intervals, are provided, is positioned between a barrel and a hammer, as shown on pages 52 to 56, March 2000 of the monthly magazine: ┌GEKKAN ARMS MAGAZINE┘, published on Mar. 1, 2000 by KABUSHIKIGAISYA HOBBY JAPAN in Japan. According to this another arrangement thus proposed, each of the sham bullets put respectively in the bullet holding chambers provided in the cylindrical member is shot with gas pressure released through the gas releasing valve and the gas leading passage from the pressure accumulating chamber provided in the cylindrical member.
In the model gun of the revolver type in which the sham bullet put in the bullet holding chamber provided in the cylindrical movable member is shot with the gas pressure supplied to the bullet holding chamber from the pressure accumulating chamber provided in the grip as mentioned above, the revolution of the cylindrical movable member on the central axis thereof for causing one of the bullet holding chambers to move into the highest position substantially on a central axis of the barrel structure is carried out in synchronism with the rotary movement of the hammer to a cocked position from an initial position. A nozzle at the end of the relatively slender and long tube extending from the pressure accumulating chamber provided in the grip is moved to come into contact with a rear opening of the bullet holding chamber placed at the highest position when the trigger is pulled. Then, a piston in the pressure accumulating chamber provided in the grip operates to release the gas pressure through the tube from the pressure accumulating chamber and then cause the gas pressure to blow off through the nozzle at the end of the relatively slender and long tube in synchronism with the rotary movement of the hammer to the initial position from the cocked position.
Accordingly, when the trigger is pulled and thereby the hammer is rotated to return to the initial position from the cocked position after the hammer has been moved into the cocking position from the initial position, the gas pressure blowing off through the nozzle at the end of the relatively slender and long tube acts on the sham bullet put in the bullet holding chamber placed at the highest position to face closely the rear end portion of the barrel structure so that the sham bullet is shot with the gas pressure through the barrel structure from the bullet holding chamber placed at the highest position.
In the model gun of the revolver type in which the sham bullet put in the bullet holding chamber provided in the cylindrical member is shot with the gas pressure supplied to the bullet holding chamber from the pressure accumulating chamber provided in the cylindrical member as mentioned also above, the cylindrical member is provided at a fixed position on a frame member. The cylindrical member has a dual structure comprising a fixed portion which is fixed on the frame member and a revolving portion which surrounds the fixed portion in such a manner as to be able to revolve around the central axis of the cylindrical member. The fixed member is provided therein with the pressure accumulating chamber, the gas leading passage extending from the pressure accumulating chamber and the gas releasing valve operative to open and close selectively the gas leading passage. The revolving portion is provided therein with the bullet holding chambers arranged around the central axis of the cylindrical member at predetermined angular intervals.
When the hammer is manually rotated to move into a predetermined position from an initial position, the revolving portion of the cylindrical member is revolved on the central axis of the cylindrical member with rotary movement of a trigger caused by the rotary movement of the hammer so that one of the bullet holding chambers is connected with the gas leading passage provided in the fixed portion and is positioned to face closely a rear end portion of the barrel. Then, when the hammer which has been moved into the predetermined position by manual operation is rotated to return to the initial position from the predetermined position, the gas releasing valve provided in the fixed portion of the cylindrical member is moved to control the gas leading passage to be open from closed in accordance with the movement of the trigger. As a result, the gas pressure is supplied to the bullet holding chamber facing closely the rear end portion of the barrel through the gas leading passage from the pressure accumulating chamber provided in the fixed portion of the cylindrical member so that the sham b
Jordan Charles T.
Nixon & Peabody LLP
Studebaker Donald R.
Western Arms
Zerr John W.
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