Securing device involving a piston propelled by compressed gas
AssigneeSociete De Prospection Et D'Inventions Techniques Spit
InventorBruno Toulouse
Life of this patent
Estimating the term…
Abstract
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 (19A) 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 (19A) 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.
Claims20
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;
- and
- a duct for injecting combustible gas, via an open end of the duct, into the chamber,
- wherein the open end of the duct comprises
- a 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;
- and
- an axial orifice directed in a direction different from that of the lateral orifice.
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;
- and
- a duct for introducing the combustible gas into the chamber;
- wherein
- the 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;
- and
- said lateral orifice has an opening area smaller than a cross sectional area of said duct in said portion.
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;
- and
- second 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.
Dependencies are inferred from the claim text.