Resources Contact Us Home
Vacuum flush valve

Image Number 7 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
Driver circuit for driving semiconductor switches
Reuse of static image data from prior image frames to reduce rasterization requirements
System for purifying air through germicidal irradiation and method of manufacture
Processing biomass
Stack and folding-typed electrode assembly and method for preparation of the same
Method of preparing enteric hard capsule and enteric hard capsule prepared thereby
Passive translational velocity measurement from optical information
  Randomly Featured Patents
Antipyretic and analgesic methods using optically pure R-ketorolac
Flush tank system
Method for modeling and rendering complex surfaces using local height maps
Metal gate device with reduced oxidation of a high-k gate dielectric
Power source for wire-cut electric discharge machines
Wellbore top drive systems
Composite compound with mixed crystalline structure
Synchronous flash memory command sequence
Programmable phase detector for sequence equalizer for optical channels
Cutting tool holder