A pneumatic nail gun includes a gun body having a cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting high pressure air; a trigger at one end of the main air housing; a main passage disposed at a peripheral portion of the cylinder, the main passage being connec
A pneumatic nail gun includes a gun body having a cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting high pressure air; a trigger at one end of the main air housing; a main passage disposed at a peripheral portion of the cylinder, the main passage being connecting with the main air housing for gathering high pressure air therein; and a bottom valve disposed at a bottom peripheral portion of the cylinder, the bottom valve being driven to upwardly move for continuously guiding high pressure air into the bottom chamber to drive the hitting piston upwardly move to reposit when the trigger is released. When the high pressure air in the main passage is recharged, the bottom valve is driven by the high pressure air gathered in the main passage to move downward to reposit after the hitting piston being reposited.
대표청구항▼
What is claimed is: 1. A pneumatic nail gun comprising: a gun body having a unmovable cylinder therein a hitting piston disposed in the cylinder to divide the cylinder into a top chamber and a bottom chamber a main air housing collecting a compressed high pressure air with a constant pressure and a
What is claimed is: 1. A pneumatic nail gun comprising: a gun body having a unmovable cylinder therein a hitting piston disposed in the cylinder to divide the cylinder into a top chamber and a bottom chamber a main air housing collecting a compressed high pressure air with a constant pressure and a trigger at one end of the main air housing driving the high pressure air to hit a nail; at least one main passage disposed at a peripheral portion of the cylinder or a side of the main air housing, the at least one main passage being connected with the main air housing for introducing and gathering high pressure air therein, the high pressure air in the main passage being discharged after the hitting piston hitting the nail before reposting; at least one top valve hole disposed adjacent to a top portion of the cylinder; at least one top through hole disposed at a side of the main passage, and the top through hole having a cross-section smaller than that of the top valve hole and being used for continuously guiding the high pressure air from the main air housing into the main passage; and a bottom valve disposed at a bottom peripheral portion of the cylinder, the bottom valve being driven to upwardly move for continuously guiding high pressure air into the bottom chamber of the cylinder to drive the hitting piston upwardly move to reposit when the trigger is released, the high pressure air in the main passage being recharged, and the bottom valve being driven by the high pressure air gathered in the main passage to move downward to reposit after the hitting piston being reposited. 2. The pneumatic nail gun as claimed in claim 1, further comprising at least one bottom through hole disposed at a bottom portion in the gun body adjacent to a bottom portion of the bottom valve, after the hitting piston moving downward to hit nails and when the top chamber being closed with main air housing, the bottom through hole being used for guiding the high pressure air in the main air housing to drive the bottom valve to upwardly move; and a plurality of bottom valve holes disposed at outside surface of the gun body adjacent to a bottom portion thereof, when the bottom valve moving downward to reposit, the bottom valve holes shuts off the fluid communication of the high pressure air into the bottom chamber. 3. The pneumatic nail gun as claimed in claim 1, wherein the top valve hole is opened when the hitting piston moves down to hit nails and before reposition, the high pressure air in the main passage are exhausted, when the hitting piston reposits, the top valve hole is closed to gather high pressure air in the main passage. 4. The pneumatic nail gun as claimed in claim 1, wherein the main passage is disposed between an outside surface of the cylinder and a side wall of the gun body, and the side wall is disposed between the main passage and the main air housing, and the top through hole is disposed on the side wall of the gun body. 5. The pneumatic nail gun as claimed in claim 1, wherein the top valve hole is taken as one end of the main passage, a top portion of the top chamber extended to form a concave chamber connected with the top valve hole, and a valve bolt is extended from a top portion of the piston, which is capable of passing in and out of the concave chamber for controlling open and close of the top valve hole. 6. The pneumatic nail gun as claimed in claim 5, wherein the main passage is disposed at an outside of a rib wall in the gun body that formed by the main air housing, and the top through hole is disposed on the rib wall. 7. The pneumatic nail gun as claimed in claim 1, wherein the top valve hole is taken as one end of the main passage, and is connected with side walls of a top portion of the cylinder for controlling open and close of the hitting piston. 8. The pneumatic nail gun as claimed in claim 1, further comprising a lower chamber disposed upon the bottom valve and between the peripheral portion of the cylinder and the inner walls of the gun body, the lower chamber being connected with the main passage for gathering high pressure air to drive the bottom valve to downwardly move to reposit. 9. The pneumatic nail gun as claimed in claim 8, further comprising a bottom spring installing in the lower chamber and abutting the bottom valve, and the bottom spring having a push force less than that of the high pressure air gathering in the main air housing for driving the bottom valve upwardly move. 10. The pneumatic nail gun as claimed in claim 1, wherein the bottom valve is abutted by a spring, and the spring has a push force less than that of the high pressure air gathering in the main air housing for driving the bottom valve upwardly move.
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이 특허에 인용된 특허 (19)
Vornberger George F. (Cincinnati OH) Crutcher John P. (Cincinnati OH), Automatic firing system for pneumatic tools.
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