Hazardous waste removal devices
AssigneeBurr-Brown Corporation
InventorDennis Murphy
Life of this patent
Estimating the term…
Abstract
An apparatus for transferring toxic waste liquid directly into a 55 gallon waste drum includes a mobile drum cradle that lifts the drum so it can be moved to a container presently holding the toxic liquid. A vacuum is produced in a transfer reservoir, and an inlet valve of the tank is opened and a dump valve of the tank is closed. The vacuum draws waste liquid through a tube and the inlet valve into the transfer reservoir until a full condition is sensed. The vacuum then is released, the inlet valve is closed, and the dump valve is opened, dumping waste liquid from the transfer reservoir through the dump valve directly into the drum. This procedure is automatically repeated until all of the waste liquid is transferred or a drum full condition is sensed. The drum is then carried to a disposal site by the mobile drum cradle.
Claims9
Apparatus for transferring hazardous liquid from a container into a storage drum, comprising in combination:
- (a) a base supported on a floor by wheels;
- (b) an upright member attached to the base;
- (c) a drum cradle connected to the upright member and a clamp assembly releasably attaching the drum to the drum cradle;
- (d) means for raising and lowering the drum cradle and the drum attached thereto to allow transporting the drum by rolling the base along the floor;
- (e) a transfer reservoir;
- (f) an inlet valve coupled between the transfer reservoir and an inlet tube;
- (g) a dump valve coupled between the transfer reservoir and a dump tube extending into an opening in the top of the drum;
- (h) reservoir sensing means for providing a first signal if the transfer reservoir is full, and means for producing a second signal after dumping contents of the transfer reservoir;
- (i) first means for producing a vacuum in the transfer reservoir, closing the dump valve, and opening the inlet valve to draw hazardous liquid into the transfer reservoir in response to the second signal;
- (j) second means for sensing when the transfer reservoir is full, releasing the vacuum in the transfer reservoir, closing the inlet valve, and opening the dump valve to dump the hazardous liquid in the transfer reservoir into the drum in response to the first signal;
- and
- (k) a transfer reservoir stage supporting the transfer reservoir and the third means for raising and lowering the reservoir.
Dependencies are inferred from the claim text.