Fluid handling – Diverse fluid containing pressure systems – Main line flow displaces additive from shunt reservoir
Patent
1997-12-23
1999-08-17
Michalsky, Gerald A.
Fluid handling
Diverse fluid containing pressure systems
Main line flow displaces additive from shunt reservoir
4431, 4434, 137899, F04F 300
Patent
active
059378883
ABSTRACT:
The unpleasant task of manually removing a sewage holding tank from a recreation vehicle at a campground, and emptying it, is avoided by operatively connecting the RV sewage system to a stationary (preferably underground) vacuum installation at the campground. While the RV is renting space at the campground it is connected to an above ground vacuum hookup (typically including a conduit and a shut-off valve, and usually also a flexible hose with a dripless free end connection), at a campsite. The hookup is, in turn, connected to at least one underground vacuum source. The vacuum source may be a vacuum pump connected to a number of vacuum tanks (one for each hookup), with a check valve (e. g. duckbill valve) isolating each vacuum tank from the others. Alternatively, the vacuum source may be a vacuum generator connected to each hookup, and a common gravity sewer pipe connected to all of the vacuum generators.
REFERENCES:
patent: 4184506 (1980-01-01), Varis et al.
patent: 5408704 (1995-04-01), Bailey et al.
patent: 5621924 (1997-04-01), Friedman et al.
patent: 5653262 (1997-08-01), Hanemaayer
Nuhn Industries Ltd. "Vacuum Sewage Tanker" brochure, admitted prior art. (Undated).
VacuFlush System flyer, admitted prior art. (Undated).
McKiernan Edward F.
Sigler James A.
Michalsky Gerald A.
Sealand Technology, Inc.
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