Abstract: A diaphragm type of flush valve for use with toilet devices such as urinals and water closets includes a body having an inlet and an outlet. There is a valve seat between the inlet and outlet and a valve member is movable to a closing position on the valve seat to stop flow between the inlet and outlet. The valve member includes a diaphragm assembly peripherally attached to the body. There is a pressure chamber above the diaphragm assembly for holding the valve member on the valve seat. A filter and bypass orifice in the diaphragm assembly connects the inlet and the pressure chamber. The filter includes a circumferential filter ring attached to the underside of the diaphragm and positioned adjacent its periphery. The ring has a plurality of circumferentially spaced filter grooves in communication with the inlet.

Abstract: A compact, self-contained, automatic flow control and venting apparatus for the automatic interruption of liquid flowing into a liquid storage receptacle during the refilling process is disclosed wherein a dual-chambered, offset valve mechanism is controlled by the movement of a float assembly. A bi-directional lever member linked to the float assembly is used to control the movement of the valve mechanism between its open and closed positions. The apparatus also provides for the automatic release of air or vapor from within the receptacle during the refilling process and for the automatic checking of liquid backflow through the valve mechanism.

Abstract: A valve for controlling fluid flow is provided, which permits fluid flow through the valve upon a first exposure to incident light, and prevents fluid flow through the valve upon a second exposure to incident light. The valve includes inlet and outlet passageways that are adapted to divert a portion of the fluid away from a central passageway to shift a plunger between a first position and a second position. In the first position, the plunger permits fluid flow through the valve, and in the second position, the plunger prevents fluid flow through the valve.

Abstract: The invention provides a two part vacuum interlock for a vacuum chamber wh utilizes the chamber itself as an interconnecting member.