IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0299827
(2002-11-20)
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우선권정보 |
FR-2001-115052 (2001-11-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Societe de Prospection et d'Inventions Techniques SPIT
|
대리인 / 주소 |
Lowe Hauptman Gilman & Berner LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
7 |
초록
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A device for securing a plug, of the type involving a piston ( 9 ) propelled by gas, has a combustion chamber ( 5 ) delimited on one side by the piston and on the other side by a cylinder head ( 7 ) with a duct ( 19 ) for injecting combustible gas open via one end ( 19 A) into the chamber. The duct
A device for securing a plug, of the type involving a piston ( 9 ) propelled by gas, has a combustion chamber ( 5 ) delimited on one side by the piston and on the other side by a cylinder head ( 7 ) with a duct ( 19 ) for injecting combustible gas open via one end ( 19 A) into the chamber. The duct ( 19 ) has an orifice for creating a pressure drop between the part of the duct ( 19 ) upstream of the end ( 19 A) and the chamber ( 5 ) itself, so as to at least partially avoid the vaporizing of the combustible gas in the part of the duct upstream of the end.
대표청구항
▼
1. A device for driving a plug, said device comprising:a cylinder having a cylinder head;a piston moveable within the cylinder;a combustion chamber defined between the piston and the cylinder head; anda duct for injecting combustible gas, via an open end of the duct, into the chamber,wherein the ope
1. A device for driving a plug, said device comprising:a cylinder having a cylinder head;a piston moveable within the cylinder;a combustion chamber defined between the piston and the cylinder head; anda duct for injecting combustible gas, via an open end of the duct, into the chamber,wherein the open end of the duct comprisesa lateral orifice having a cross sectional area narrower than that of the duct for creating a pressure drop between a part of the duct upstream of said open end and the chamber, so as to at least partially avoid vaporization of the combustible gas in said part of the duct upstream of the open end; andan axial orifice directed in a direction different from that of the lateral orifice. 2. The device according to claim 1, wherein a sum of the cross sectional areas of the orifices is at least 10% smaller than the cross sectional area of the duct. 3. The device according to claim 1, further comprising a blower for mixing the combustible gas inside the combustion chamber, the duct comprising at least one orifice oriented to direct at least a portion of the combustible gas injected into the chamber toward the blower. 4. The device according to claim 1, wherein the lateral orifice is directed in a direction parallel to a plane of the piston. 5. The device according to claim 1, wherein the duct extends substantially parallel to an axial direction of the cylinder along which the piston is adapted to reciprocate, said axial orifice being directed in said axial direction, and said lateral orifice being directed transversely of said axial direction. 6. The device according to claim 1, wherein the cross sectional area of said axial orifice is about 35% of the cross sectional area of the duct, and the cross sectional area of said lateral orifice is about 50% of the cross sectional area of the duct. 7. An internal combustion tool for driving a plug, said tool comprising:a combustion chamber in which a combustible gas is to be combusted to provide energy that drives the plug; anda duct for introducing the combustible gas into the chamber;whereinthe duct has a portion located within said chamber;said portion has a lateral orifice formed in a side wall of said portion of said duct; andsaid lateral orifice has an opening area smaller than a cross sectional area of said duct in said portion. 8. The tool of claim 7, further comprising an axial orifice formed at a terminal end of said portion of said duct. 9. The tool of claim 8, wherein a sum of the opening area of the lateral orifice and an opening area of the axial orifice is at least 10% smaller than the cross sectional area of the duct in said portion. 10. The tool of claim 8, further comprising a blower for mixing the combustible gas inside the combustion chamber, said axial orifice being oriented to direct at least a portion of the combustible gas injected into the chamber toward the blower. 11. The tool of claim 8, wherein the axial orifice is directed in an axial direction of said portion of said duct and said lateral orifice is directed transversely of said axial direction. 12. The tool of claim 8, wherein the opening area of said axial orifice is smaller than the opening area of said lateral orifice. 13. The tool of claim 7, wherein said portion of said duct comprises multiple orifices, including said lateral orifice, for introducing the combustible gas into said chamber;a sum of opening areas of all said orifices is smaller than the cross sectional area of said duct in said portion. 14. The tool of claim 13, wherein said sum of the opening areas of all said orifices is at least 10% smaller than the cross sectional area of said duct in said portion. 15. The tool of claim 7, whereinsaid portion of said duct comprises said side wall that defines the cross sectional area of said duct in said portion and a transverse wall that defines a terminal end of said portion of said duct;said lateral orifice is spaced from said transverse wall in an axial direction of said duct in said portion; andsaid portion of said duct further comprises an axial orifice formed in said transverse wall. 16. The tool of claim 7, whereinsaid portion of said duct comprises said side wall that defines the cross sectional area of said duct in said portion and a transverse wall that closes off said duct; andsaid lateral orifice is spaced from said transverse wall in an axial direction of said duct in said portion. 17. An internal combustion tool for driving a plug, said tool comprising:a combustion chamber in which a combustible gas is to be combusted to provide energy that drives the plug;first means for delivering the combustible gas from a combustible gas cartridge, where said combustible gas is stored in a liquid state, into said chamber; andsecond means for creating a pressure drop between the first means and the chamber, thereby delaying vaporization of said combustible gas being delivered to said chamber by said first means. 18. The tool of claim 17, wherein said second means is located within said chamber. 19. The tool of claim 17, wherein said first means includes a tube having a substantially constant cross section, and said second means includes at least one orifice formed through a wall of said tube, an opening area of said at least one orifice being smaller than an area of said cross section of said tube. 20. The tool of claim 17, wherein said first means includes a tube having a substantially constant cross section and being in fluid communication with the chamber through a number of orifices that define said second means;a sum of opening areas of all said orifices, through which the tube is communicated with the chamber, being smaller than an area of said cross section of said tube.
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