Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Patent
1974-11-01
1976-08-03
Cohan, Alan
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
137418, 137422, 417133, F04F 106
Patent
active
039726509
ABSTRACT:
A sewage system wherein a sewer line for delivering sewage to a discharge point and a compressed air line extend adjacent to each other. A pluraity of tanks at spaced points and serving to collect sewage from different sources are connected to the sewer line and to the air line. Each connection of a tank with the air line is controlled by a multiple stage valve means which normally vents the tank and prevents air flow to the tank. Each multiple stage valve means includes a pilot valve controlled by float means in the associated tank and a pneumatically activated valve. Check valves are interposed adjacent each tank at the sewage collection and sewage discharge points thereof.
The method of operation of the system entails delivery of sewage to each tank while it is vented to atmosphere and closed to said sewer line and said compressed air line until sewage reaches a selected level in the tank at which the float means actuates the multiple stage valve to close the vent of the tank and deliver air to the tank under pressure sufficient to discharge sewage from the tank into the sewer line. When the contents of the tank lower to a selected level the float means actuates the multiple stage valve to terminate delivery of compressed air to the tank and to again vent the tank to atmosphere.
REFERENCES:
patent: 464651 (1891-12-01), Cummings
patent: 664183 (1900-12-01), Shone et al.
patent: 1255306 (1918-02-01), Gilles
patent: 1437686 (1922-12-01), Selin
Cohan Alan
Michalsky Gerald A.
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