초록 ▼

A valve for controlling flow of cryogenic liquid propellant in a rocket engine comprises a double acting piston-cylinder unit having a first position in which the valve is closed and a second position in which the valve is open, a locking device being engageable with the double acting piston-cylinde

A valve for controlling flow of cryogenic liquid propellant in a rocket engine comprises a double acting piston-cylinder unit having a first position in which the valve is closed and a second position in which the valve is open, a locking device being engageable with the double acting piston-cylinder unit to lock the unit in the closed position of the valve is closed while being free from the valve in its open position. The locking device has a control piston connected to a locking member to selectively lock and unlock the piston-cylinder unit against the force of a spring acting to lock the piston-cylinder unit, and a control chamber capable of receiving a pressure medium to move the piston and to unlock the piston-cylinder unit. A two-way control valve controls flow of the pressure to the control chamber and to valve closing and opening operation chambers of the piston-cylinder unit. The valve opening chamber receives the pressure medium from the control chamber via a passageway which is blocked by the piston until the piston-cylinder unit is unlocked.

대표청구항 ▼

[What is claimed is:] [1.]a double acting piston-cylinder unit having a first position in which the valve is closed and a second position in which the valve is open,a locking device engageable with the double acting piston-cylinder unit to lock said unit in said first position when the valve is clos

[What is claimed is:] [1.]a double acting piston-cylinder unit having a first position in which the valve is closed and a second position in which the valve is open,a locking device engageable with the double acting piston-cylinder unit to lock said unit in said first position when the valve is closed,said locking device including a control piston, a locking member coupled to said control piston to selectively lock and unlock said piston-cylinder unit, a spring acting on said control piston to urge the locking member to lock the piston-cylinder unit, and a control chamber capable of receiving a pressure medium to urge said piston, against the opposition of the spring, to unlock said piston cylinder unit,a two-way control valve having a first position in which said control chamber is connected to a source of said pressure medium and a second position in which a first operating chamber of said piston-cylinder unit is connected to said pressure medium to urge the valve to said closed position, said control chamber in said second position of the two-way control valve being vented and said first operating chamber in said first position of said two-way valve being vented,said piston-cylinder unit having a second operating chamber connected via a passageway to said control chamber to receive said pressure medium and urge the valve to said open position when the two-way control valve is in said first position.