TANK HAVING A PISTON PRESSURIZED BY HOT GAS

• US 20090206111A1
• Filed: 02/18/2009
• Published: 08/20/2009
• Est. Priority Date: 02/19/2008
• Status: Active Grant

• Current Assignee: ArianeGroup SAS
• Original Assignee: Snecma (Safran SA)
• Inventors: Conrardy, Jean-Marie, Peyrisse, Daniel, Le Louedec, Dominique
• Granted Patent: US 8,499,983 B2
• Time in Patent Office: Days
• US Class Current: 222/386.500
• CPC Class Codes: F02K 9/50 using pressurised fluid to pressurise the propellants
• CPC Class Codes: F02K 9/605 Reservoirs
• CPC Class Codes: F05D 2300/431 Rubber
• CPC Class Codes: F05D 2300/501 Elasticity

Abstract

The tank comprises a variable volume chamber containing a liquid and defined by a wall; and a piston suitable for moving in the tank under thrust from powder gas at a temperature much higher than that of the liquid in order to decrease the volume of the chamber. The tank also comprises a deformable elastomer membrane pressed against a face of the piston outside the chamber, the membrane being suitable for thermally protecting the wall and for providing sealing between the piston and the wall.

Claims

1. A tank comprising:

a variable volume chamber containing a liquid and defined by a wall; and

a piston suitable for moving in said tank under thrust from powder gas at a temperature much higher than that of said liquid in order to decrease the volume of said chamber;

said tank further comprising a deformable elastomer membrane pressed against a face of said piston outside said chamber, said membrane being suitable for thermally protecting said wall and for providing sealing between said piston and said wall.

2. A tank according to claim 1, wherein said piston moves along a shaft forming a duct for delivering said liquid, said duct including an opening formed close to the end of the duct situated at the end of said chamber, and at at least one end that is open for delivering said liquid.

3. A tank according to claim 1, including an opening in its end wall enabling the liquid to be ejected in the travel direction of said piston.