Valve assembly

A valve for regulating the flow of fuel from a fuel source that contains fuel under pressure to achieve a substantially steady rate of flow of fuel to a fuel consuming apparatus, comprising:

• a valve body having an inlet adapted for connection to the fuel source, a downstream chamber having a restricted outlet orifice adapted for connection to the fuel consuming apparatus and serving as a reservoir of fuel at a chamber pressure to supply fuel through the restricted outlet orifice to the fuel consuming apparatus, a flow passage extending between the inlet and the restricted outlet orifice, a central bore communicating with the flow passage, and a first valve seat disposed in the flow passage between the inlet and orifice;
• a needle body extending into the central bore of the valve body and having a blind bore;
• a pin having a first pin portion disposed in the blind bore;
• a flange extending from the pin;
• a resilient gasket disposed on one side of the flange;
• and
• a spring disposed over the first pin portion and engaging another side of the flange;
• the spring and the chamber pressure applying a compression force on the flange causing the gasket to be compressed against the first valve seat to form a second restricted orifice with a variable second orifice opening between the gasket and the first valve seat while the gasket abuts the first valve seat so that a pressure drop of the fuel occurs between the pressure of the fuel upstream of the second restricted orifice and the chamber pressure and the magnitude of the compression force compressing the gasket and affecting the magnitude of the second orifice opening so that the gasket adjusts the flow of fuel through the second restricted orifice by automatically increasing or decreasing the flow of the fuel into the chamber in response to the chamber pressure and in response to the compression force applied on the gasket by the spring against the first valve seat.