Patent ID: 6038929
Filing Date: 2000-03-21
Classification: B67D

Abstract:
Apparatus for testing fluid pressure in a fluid system, the apparatus comprising:a member for connecting to the fluid system in a manner to receive fluid from the system;a housing,a piston adapted for reciprocal movement in the housing for establishing a fluid pressure;a valve for selectively connecting the housing to the member or to atmosphere, the valve being adapted toconnect the housing to atmosphere so that the movement of the piston in one direction expels any fluid from the housing into the atmosphere, andconnect the housing to the system so that movement of the piston in the other direction draws fluid from the system into the housing to create a negative pressure in the system;wherein after the negative pressure is created in the system, the valve is adapted to reconnect the housing to atmosphere to isolate the system; anda gauge for registering pressure in the system.