Excavating – Beneath a body of water – Suction
Patent
1997-03-04
1999-12-14
Pezzuto, Robert E
Excavating
Beneath a body of water
Suction
175 67, E02F 388
Patent
active
060001518
ABSTRACT:
A vacuum excavation system which incorporates a low consumption air lance, a highly efficient multi-stage vacuum generation system effectively isolated from the waste stream and the air source, and a highly portable material collection system. The air lance includes a cylindrical main body which narrows to a flat taper nozzle at the digging end, and a tee-shaped handle with a swivel type air fitting at one end, while the vacuum generation system is a multi-stage ejector fitted onto a collection drum and consisting of successive venturi tubes with pressure equalizing check valves on the second and higher stages, the material collection system consisting of the drum and hoses or pipes connected to the drum through a separate opening. The system can be powered entirely by one 185 cfm portable air compressor, available from local tool rental firms if one is not owned, so than nearly any contractor, utility company, or design firm can easily outfit themselves for vacuum excavation, at a cost for the excavation system less the air compressor of less than one tenth that of a conventional system.
REFERENCES:
patent: 1137767 (1915-05-01), LaBlanc
patent: 1496635 (1924-06-01), Higley
patent: 2655408 (1953-10-01), Williams
patent: 2785926 (1957-03-01), LaTaste
patent: 3177635 (1965-04-01), Cawl et al.
patent: 3512841 (1970-05-01), Kollasch et al.
patent: 3853079 (1974-12-01), Dunne
patent: 3861598 (1975-01-01), Fleischer
patent: 3971096 (1976-07-01), Renholt
patent: 4112695 (1978-09-01), Chang et al.
patent: 4633957 (1987-01-01), Prost
patent: 4696625 (1987-09-01), Greenberg
patent: 4776731 (1988-10-01), Briggs et al.
patent: 4936031 (1990-06-01), Briggs et al.
patent: 5050340 (1991-09-01), Seifert
patent: 5140759 (1992-08-01), Artzberger
patent: 5170943 (1992-12-01), Artzberger
patent: 5212891 (1993-05-01), Schuermann et al.
patent: 5361855 (1994-11-01), Schuermann et al.
patent: 5487236 (1996-01-01), Moon
patent: 5494124 (1996-02-01), Dove et al.
LandOfFree
Vacuum excavation apparatus having an improved air lance, air la does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum excavation apparatus having an improved air lance, air la, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum excavation apparatus having an improved air lance, air la will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-853183