IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0614071
(2006-12-20)
|
등록번호 |
US-7341174
(2008-03-11)
|
우선권정보 |
TW-95140022 A(2006-10-30) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
12 |
초록
▼
A pneumatic nail gun includes a gun body having a movable cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting a compressed high pressure air with a constant pressure; and at least one main passage disposed at a peripheral portion of the cylinder or a side of th
A pneumatic nail gun includes a gun body having a movable cylinder therein; a hitting piston disposed in the cylinder; a main air housing collecting a compressed high pressure air with a constant pressure; and 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 having a valve bolt therein to divide the main passage into a top passage, a middle valve chamber, and a bottom passage, the top passage and the middle valve chamber being connecting with the main air housing for introducing and gathering high pressure air therein, the middle valve chamber being connecting with the bottom passage via the main valve opening, the valve bolt being capable of controlling the opening and closing of the main valve opening for rapidly repositing the piston.
대표청구항
▼
What is claimed is: 1. A pneumatic nail gun comprising: a gun body having a movable cylinder installed therein, a head valve integrally formed or disposed on the top of the cylinder, a hitting piston disposed in the cylinder to divide the cylinder into a top cylinder chamber and a bottom cylinder c
What is claimed is: 1. A pneumatic nail gun comprising: a gun body having a movable cylinder installed therein, a head valve integrally formed or disposed on the top of the cylinder, a hitting piston disposed in the cylinder to divide the cylinder into a top cylinder chamber and a bottom cylinder chamber; a main air housing accumulating compressed air at a high pressure to drive the hitting piston to downwardly move to hit nails and to upwardly move to reposit; a main passage formed at a peripheral portion or a side of the movable cylinder, having a valve bolt installed therein to divide the main passage into a top passage, a middle valve chamber, and a bottom passage; a top through hole connected between the top passage and the main air housing to guide the high pressure air into the top passage for accumulation; a bottom through hole connected between the middle valve chamber and the main air housing to guide the high pressure air into the middle valve chamber for accumulation; and a main valve opening formed between the middle valve chamber and the bottom passage, to be opened or closed under the controlling of the valve bolt, wherein before the piston hitting the nails, the high pressure air in the top passage drives the valve bolt to downwardly move to close the main valve opening so that air communication between the middle valve chamber and the bottom passage is closed, when the piston hitting the nails and before repositing, the high pressure air in the top passage is discharged to make the high pressure air in the middle valve chamber to drive the valve bolt to upwardly move to open the main valve opening for guiding the high pressure in the main air housing into the bottom cylinder chamber via the middle valve chamber and the bottom passage so that the piston is driven to upwardly move, and after the piston reposited, the valve bolt moves down to close the main valve opening. 2. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in an ear portion disposed on the outer surface of the cylinder, a bottom clip ring is covered on the top of the ear portion, a top clip ring is disposed between under the head valve and a rib wall of the gun body around the peripheral of the bottom clip ring, the top passage is formed at the position surrounded by the top of the valve bolt, the bottom clip ring, the top clip ring and the bottom of the head valve, and the top through hole is arranged on one of the bottom clip ring, the ear portion or the top clip ring. 3. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in a rib wall of the gun body at a side of the cylinder, a bottom clip ring is disposed between the top of the rib wall and the bottom of the head valve, and the top through hole is arranged on the bottom clip ring or the ear portion. 4. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in an ear portion disposed on the outer surface of the cylinder, the ear hole is connected with the bottom cylinder chamber via an air inlet, the bottom passage is formed at the position between the bottom of the valve bolt and the air inlet, and the bottom through hole is arranged at the ear portion. 5. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in a rib wall of the gun body at a side of the cylinder, an air inlet is formed at the bottom of the ear hole to connect with a lower chamber formed between the inner wall of the gun body and the outer surface of the cylinder, a lower air hole is formed near the bottom of the lower chamber to connect with the bottom cylinder chamber, the bottom passage is formed at the position surrounded by the bottom of the valve bolt, the lower chamber and the lower air hole, and the bottom through hole is arranged at the ear portion. 6. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in a rib wall of the gun body at a side of the cylinder, the ear hole is connected with the bottom cylinder chamber via at least one lower air hole, the bottom passage is formed at the position between the bottom of the valve bolt and the lower air hole, and the bottom through hole is arranged at the ear portion. 7. The pneumatic nail gun as claimed in claim 1, wherein the valve bolt is installed in an ear hole formed in the gun body at a side of the cylinder, the valve bolt disposed in the ear hole includes a step surface, two air tight rings and are respectively disposed above and below the step surface to be located between the outer wall of the valve bolt and the inner wall of the gun body, and an air outlet is formed through the gun body to connect the ear hole to atmosphere at a location between two air tight rings. 8. The pneumatic nail gun as claimed in claim 1, wherein the cylinder further comprises at least one top valve hole connecting with the top passage, the top valve hole controls the fluid communication between the top passage and the top cylinder chamber. 9. The pneumatic nail gun as claimed in claim 1, wherein the portion of the valve bolt disposed in the top passage has a surface of a first area, and the portion of the valve bolt disposed in the middle valve chamber has a surface of a second area, the first area is larger than the second area. 10. The pneumatic nail gun as claimed in claim 1, wherein the top passage includes a spring therein abutting the valve bolt to downwardly move to close the main valve opening, the spring has a pushing force smaller than the force of the high pressure air gathering in the bottom passage to drive the valve bolt to upwardly move. 11. The pneumatic nail gun as claimed in claim 1, wherein a clip ring is disposed between the top of the head valve and the cylinder, a chamber is formed between the head valve and the cylinder, and a through hole connected with the chamber is formed on the cylinder so that air flows from the chamber through the through hole to the top cylinder chamber and flow out through a top exhausting hole on the top of the gun body. 12. The pneumatic nail gun as claimed in claim 1, wherein a flange is formed on the top of the cylinder for the head valve pushing the cylinder to upwardly move together therewith, and a chamber is formed between the head valve and the cylinder and connects to atmosphere through an air outlet formed on the side surface near the top of the gun body.
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