Resources Contact Us Home
Vacuum flush valve

Image Number 2 for United States Patent #4376315.

A flexible valve element in the form of a flexible diaphragm movable between open and closed positions for opening or closing the drain. By operation of a control pressure chamber formed over the outer or exterior side of the diaphragm and which operates directly by application or pressure or vacuum to the same to move the diaphragm between the open and closed position. A control valve provides the connection from the control chamber to the passenger cabin to provide operating pressure for closing the valve and is alternatively connectable to an accumulator which stores vacuum normally supplied from a source such as that applied to the downstream side of the drain. The control valve is preferably operated by a solenoid which responds to an electrical signal. A manual override system is provided for closing the valve by hand. The invention finds particular application as a valve for use in a non-circulatory vacuum-operated waste disposal system for passenger conveyances such as aircraft in which a toilet bowl is connected to a vacuum-waste holding tank by a drain connected to the bowl and incorporating a valve.

  Recently Added Patents
Methods for forming patterned structures
Check weigher comprising of a rotating weighing chute with an accumulating and a discharge position that calculates flow rate by measuring weight accumulated during a predetermined time interv
Sacrificial spacer approach for differential source/drain implantation spacers in transistors comprising a high-k metal gate electrode structure
Elastic wave device having a capacitive electrode on the piezoelectric substrate
Method of producing probabilities of being a template shape
System and method for removing oxide from a sensor clip assembly
Co-crystals of agomelatine, a process for there preparation and pharmaceutical compositions containing them
  Randomly Featured Patents
Semiconductor device
Apparatus for securing an opening with a removable cover
Distortion compensation apparatus and method
Method for the treatment of tap water and drinking water
Tri-aza macrocycles and metal complexes thereof
Cylinder head for liquid-cooled multicylinder internal combustion engines
Mechanically driven roller vane pump with channels between corresponding cam and carrier chambers
Modular suspension strut bearing
Frame insert sill
Printing apparatus with a plurality of paper feeding units and controls of same