Abstract: A narrow accessway sewage pump remotely operable, multi-part, quick connect/disconnect slide coupling comprising a fixed portion that forms a first part of a slide-together, bayonet-type coupling with a movable portion forming a second part of the coupling. The movable part of the coupling supports a liquid pump and slides together with and is physically supported by the fixed portion. A third slide stop valve portion is positioned intermediate both the fixed and movable portions and all three portions of the coupling have interiorly formed open passageways for passage of liquid therethrough. The passageways in the three portions all come into alignment upon the three portions being properly seated together in assembled relation.

Abstract: A narrow-accessway sewage collection tank assembly and system using a remote operated, two-part, slide coupling for supporting a sewage pump within an enlarged collection tank for installation outside below normal ground level of residences, commercial and industrial buildings for use in the collection and disposal of sewage produced in the buildings. The narrow accessway tank system can be installed with minimum cost and impact on the environment while maintaining proper operating conditions, good scouring of the collection tank bottom and facilitating below ground installation and subsequent maintenance and servicing of the sewage pump unit form the surface. The system comprises an enlarged sewage collection tank to be planted below level in the ground near a building and connected to suitable gravity drain conduits interconnected between the facility to be serviced and the collection tank for collecting raw sewage.

Abstract: A rotating gas diffuser for shearing fine gas bubbles from the surface thereof when the diffuser is immersed in a body of liquid and rotated therein. The rotatable shaft of the diffuser may carry a plurality of main rigid structural spokes and an equal number of rigid hollow gas feed conduits positioned alternately around the shaft. A plurality of plates, each in the form of a section of an annulus with its lateral edges radially positioned with respect to the circular rotating gas diffuser, is supported either on the top or the bottom of the diffuser, or on both, near its perimeter. Each porous plate is carried by a plate holder that has a shape similar to its associated porous plates, and with those plates defines a gas plenum having an area substantially equal in extent to, but no greater than, the area of the plates.