Excavating – Ditcher
Patent
1992-11-25
1994-04-05
Reese, Randolph A.
Excavating
Ditcher
37905, 299 17, E02F 388
Patent
active
052993701
ABSTRACT:
An excavation apparatus includes a tank partitioned into two isolated chambers. One of the chambers is adapted to hold fresh water and communicates with a flexible wand to be carried by operating personnel. The other chamber is adapted to hold excavated material and communicates with a flexible hose also to be carried by operating personnel. A single, positive displacement vacuum pump driven by a motor is selectively connectable to one or both chambers through a series of valves and hoses. Depending on the valve positions, either the intake or exhaust port of the vacuum pump is in communication with one or both the chambers. The vacuum pump can therefore by used to fill the front chamber with fresh water as well as to pressurize the front chamber so that the water held therein can be discharged through the wand under pressure sufficient to dislodge earth at the excavation site. The vacuum pump can then be used to draw the dislodged earth and discharged water into the other chamber. When the other chamber becomes full, the vacuum pump can pressurize that chamber to discharge the contents therein via the flexible hose at a location away from the excavation site.
REFERENCES:
patent: 4479741 (1984-10-01), Berti et al.
patent: 4795217 (1989-01-01), Hilan's
patent: 4854058 (1989-08-01), Sloan et al.
patent: 4936031 (1990-06-01), Briggs et al.
patent: 5016717 (1991-05-01), Simons et al.
Gyori Ronald
Gyori Wendel
Gyori Wesley
Pacey Brian
Badger Daylighting Inc.
McBee J. Russell
Reese Randolph A.
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