Patent ID: 7647938

Claim:
A fill valve assembly for controlling liquid flow into a reservoir, comprising: a valve body having an outlet opening for directing liquid into the reservoir and an inlet opening; an adaptor having a liquid inlet passage therein and a valve seating face, the adaptor being configured to be demountably fixed at the inlet opening; a pressure-responsive member received in the valve body, the pressure-responsive member being movable in response to variations in a control pressure in a control chamber on a first side of the pressure responsive member with which the liquid inlet passage communicates opposite a second side of the pressure responsive member also in communication with the liquid inlet passage, the pressure-responsive member having a valve surface for sealing against the valve seating face of the adaptor to stop flow of liquid from the inlet passage into the outlet opening; biasing means acting on the pressure-responsive member such that liquid pressure acting on the first side of the pressure-responsive member acts together with the biasing means to force the valve surface toward the valve seating face of the adaptor; and retaining means for retaining the biasing means and pressure-responsive member together as a unit, the retaining means including: a retainer for abutting an end of the biasing means, a pin having a first end fixed to the retainer, the pin extending through the biasing means and being received to slide in an aperture in the pressure-responsive member, and a stop for preventing the biasing means from pulling a second end of the pin through the aperture in the pressure-responsive member; wherein the valve body, the pressure-responsive member, and the biasing means are arranged such that they are demountable from the adaptor as a unit.