Precision liquid injection system

Details Precision liquid injection system Precision liquid injection system

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 45/00 (2006.01)

Patent

CA 2252329

There is provided an injector for use in injecting a liquid into a pressurized system such as an air conditioning system. The injector has a tubular spindle having a longitudinal axis, an open end, and an opposing partially closed end. The spindle open end and spindle closed end define a cylindrical bore along the longitudinal axis of the spindle. A cylindrical piston within the spindle bore is axially aligned with the longitudinal axis of the spindle. There are sealing means such as O-ring seals between the spindle and the piston. The spindle, piston and sealing means define a chamber between the piston and the spindle closed end within the bore. A tubular driver sleeve has a longitudinal axis, an open end and an opposing closed end. The driver sleeve has threads around an interior surface of the sleeve and the spindle has compatible threads around an exterior surface of the spindle such that rotation of the driver sleeve in one direction screws the driver sleeve towards the spindle closed end. This causes the piston to move towards the spindle closed end and exert pressure on the chamber.

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