Abstract: A vacuum toilet system for efficient transport of waste material from a toilet bowl to a collection station by means of differential pressure, comprising an actuator button, a discharge valve, a water valve, and a controller valve. The various valves are simple in construction and operate on the basis of pneumatic pressure. The system is compact enough to fit into the cabinet of a conventional toilet fixture.

Abstract: A compact, self-contained, portable vacuum toilet system having a sump for collecting waste liquids by means of gravity, a differential pressure-operated discharge valve for regulating withdrawal of waste liquids from the holding sump for transport to a vacuum collection tank during a transport cycle, differential pressure-operated sensor and controller valves for regulating operation of the discharge valve in response to a hydrostatic pressure condition inside the holding sump, and a push button-operated water valve for adding water to the toilet bowl during and immediately after a flush cycle. A sink and its own push button-operated water valve may also be provided.

Abstract: An integral, vacuum operated, package system for collecting and transporting waste liquids from, e.g., a defrosted freezer, sink, bathtub, or water fountain, to a vacuum transport conduit connected to a vacuum collection station. The package system preferably includes a collection sump, sensor valve, controller valve, vacuum volume, and vacuum valve, which operatively communicate with each other by means of applied differential pressure to withdraw waste liquid from the collection sump and pass it through an opened vacuum valve during a transport cycle. The package system is compact, portable, and easily installed and maintained, and may be concealed in most applications, since it requires a mere volume generally measuring 12".times.8".times.31/2.

Abstract: An improved vacuum sewerage system for transmitting sewage, including at opposite ends a sewage collection tank at atmospheric pressure and a vacuum collection tank under vacuum pressure. The sewage is intermittently injected into a transport conduit under vacuum or subatmospheric pressure when a non-jamming vacuum control valve interposed in the conduit is opened in response to a predetermined pressure condition. The conduit is laid out in a saw-toothed fashion, having a riser, a low point, and a downslope. When no sewage is being transported through the conduit, any residual sewage collects in the low point, which generally does not completely fill with sewage so that vacuum or subatmospheric pressure is communicated throughout the conduit. When the control valve is opened, the sewage transported through the conduit forms a generally hollow cylindrical mass, which is propelled toward the vacuum collection tank.

Abstract: An improved vacuum sewerage system for transmitting sewage through an intermittently opened sewage control valve of a transport conduit by means of differential pressure. The vacuum conduit is laid out in a saw-toothed fashion, having a riser, a low point, and a downslope. When no sewage is being transported through the conduit, any residual sewage in the conduit collects in the low point, with minimal intermittent closure of the conduit over time to permit minimal drop in vacuum or subatmospheric pressure throughout the conduit such that there is more than adequate vacuum or subatmospheric pressure available to operate the control valve. When the control valve is opened, the sewage transported through the vacuum conduit forms a generally hollow cylindrical mass, which is propelled toward a vacuum collection tank.

Abstract: An electric air admission controller ("EAAC") for automatically opening and closing an air control valve connected to a vacuum sewage transport conduit with a sewage control valve, independently of the level of accumulated sewage upstream of the sewage control valve, in order to inject additional air at atmospheric pressure into the vacuum transport lines to apply additional fluid pressure to a mass of sewage therein, and to avoid a waterlogged condition by supplementary transport. In its simplest form, the EAAC system consists of a timer unit which, when activated, causes a solenoid valve to deliver vacuum/subatmospheric pressure or atmospheric pressure to the air control valve to open or close it, respectively, by application of differential pressure. Rather than rely upon the timer unit to determine a valve cycling frequency which will, on average, prevent waterlogging, however, a timer-delay module and pressure switch may be added to the system.

Abstract: A quick-release mounting apparatus for securing a unit controller assembly to the upper housing of an inlet vacuum valve for a vacuum sewerage system, for facilitating quick removal of the unit controller assembly, is disclosed. A base member, having slot-like shoulder portions on each respective side, is heat-staked to the top surface of the upper housing of the inlet vacuum valve. A quick-release mounting key member is then inserted into each of the respective shoulder slot openings on top of the mounting feet. The mounting key has respective keyed apertures to enable it to fit around certain portions of the unit controller. The mounting key has a centrally disposed spacer portion and a pair of elongated tine members, which are tapered and rounded at their respective ends. The mounting key is then pushed into the slot-like openings to secure a tight press fit of the mounting key, the mounting feet of the unit controlled assembly, within the slot-like openings of mounting base member.

Abstract: A vacuum sewerage transport system having a vacuum interface valve apparatus utilizing s sub-surface in-pit breathing, drainage and venting apparatus for a differential pressure controlled sensor-controller unit.

Abstract: A vacuum transport system for intermittently transporting sewage from a source to a collection station through a vacuum conduit under the differential influence of positive atmospheric pressure at the source and substantially lower or vacuum pressure in the vacuum conduit between a primary control valve and the collection station. The control valve of the system is operated by differential pressure to open and close the vacuum conduit at intervals for sewage transport to the collecting station when a pressure differential operated sensor-controller apparatus, which will automatically purge condensate accumulation, selectively controls the operation of the primary control valve.

Abstract: A vacuum system for transmitting intermittently injected sewage including a collection tank fed by a gravity operated sewage pipe for holding sewage at atmospheric pressure. The sewage is intermittently injected into a vacuum line under the influence of atmospheric pressure when a sewage injection valve is opened. The vacuum sewage line is connected between the injection valve and a vacuum collection tank, the vacuum collection tank having a source of vacuum pressure applied thereto. A vacuum line section is laid out in a sawtooth fashion, having a riser, a low point, and a downslope. When no sewage is being transported through the vacuum conduit, the sewage remaining in the conduit collects in the low point. The low point does not completely fill with sewage so that vacuum pressure is communicated throughout the vacuum line. When the sewage injection valve is opened, the sewage going through the vacuum line forms a hollow cylindrical mass which sweeps toward the vacuum collection tank.