초록 ▼

A portable eduction unit includes a tank, a single first hose for extending into a source of solids and liquid, such hose being connected to the tank through a check valve which opens in response to a partial vacuum in the tank. A hose within the tank has one end supported by a float and communicate

A portable eduction unit includes a tank, a single first hose for extending into a source of solids and liquid, such hose being connected to the tank through a check valve which opens in response to a partial vacuum in the tank. A hose within the tank has one end supported by a float and communicates with the first hose through a check valve that opens in response to pressurization of the tank, and a shut-off valve for controlling the flow between the first-mentioned hose and the check valves.

대표청구항 ▼

An eduction unit comprising: (a) a portable tank arranged to be selectively evacuated or pressurized to internal pressures respectively below and above atmosphere pressure; (b) a single first hose adapted at one end to be inserted into a mixture of solids and liquids external to said tank, said firs

An eduction unit comprising: (a) a portable tank arranged to be selectively evacuated or pressurized to internal pressures respectively below and above atmosphere pressure; (b) a single first hose adapted at one end to be inserted into a mixture of solids and liquids external to said tank, said first hose being supported at its other end at the top of said tank; (c) a normally closed first check valve communicating said other end of said first hose with the interior of said tank, and openable in response to said tank\s being partially evacuated; (d) a second hose adapted at one end to be inserted into any liquid contents within said tank, said second hose being supported at its other end near the top of said tank; and (e) a normally closed second check valve communicating said other end of said first hose with said other end of said second hose, and openable in response to said tank\s being pressurized above atmospheric pressure.