Abstract: Apparatus for controlling the level of a fluid in a reservoir. A reservoir has a trough within which is a valve means comprising a hollow cylindrical body having inlet and outlet apertures in fluid communication with a fluid source. A valve shuttle assembly slidingly connected to the valve comprises an "O" ring seal which defines a sealing region. The sealing region can occlude the fluid inlet aperture or permit fluid to pass to the outlet aperture. The valve shuttle is interconnected to a float which rises and lowers depending on the fluid level in the reservoir.

Abstract: An improved sealed dispenser for sequentially dispensing filters utilizing a band tangentially contacting a portion of the periphery of a wheel thereby providing a frictionalized surface. Filters may be added to the top of the dispenser in a prepackaged set and the packaging becomes a sealing top to the dispenser. A single filter can be drawn from a stack of filters positioned in the dispenser by rotating the wheel using an externally attached knob, which passes a single filter by friction between the wheel and the band. The filter exits the dispenser via a pivotably closable door located at the lower part of the front of the dispenser.

Abstract: A dispenser for sequentially dispensing filters has a band that passes in contact with a friction wheel. The band has relatively low frictional characteristics downstream from the wheel and where it contacts the wheel. The band has relatively high friction characteristics upstream of the wheel where a stack of filters may be stowed.