초록 ▼

An apparatus and method of use thereof includes a rechargeable, pre-charged vacuum canister used to remove viscous fluids, e.g., waste oil, from containers such as engine crankcases through an opening, such as a dipstick tube. The self-contained canister is first pre-charged with a near absolute vac

An apparatus and method of use thereof includes a rechargeable, pre-charged vacuum canister used to remove viscous fluids, e.g., waste oil, from containers such as engine crankcases through an opening, such as a dipstick tube. The self-contained canister is first pre-charged with a near absolute vacuum. Due to the compressibility characteristics of air, conventional, active, continuous pumping techniques, which rely on partial vacuums, do not achieve the pulling force of the near absolute vacuums achieved by the invention. The use of a self-contained, pre-charged near absolute vacuum canister system significantly increases the force applied to the viscous fluid to be extracted. Furthermore, the fluid can be simultaneously contained in a proper disposal container. As a result shortcomings of manual and electric pumping systems are overcome with the added advantage that no external pumping force is required at the site of fluid removal.

대표청구항 ▼

[ What is claimed is:] [10.] An apparatus for transferring fluid from an external reservoir and back to the same or another reservoir, said apparatus comprising: a prechargeable, sealable canister which may be evacuated to form a vacuum to be captured in the canister when the canister is disconnecte

[ What is claimed is:] [10.] An apparatus for transferring fluid from an external reservoir and back to the same or another reservoir, said apparatus comprising: a prechargeable, sealable canister which may be evacuated to form a vacuum to be captured in the canister when the canister is disconnected from a vacuum source and which may also be pressurized to capture and hold a positive pressure in said canister when the canister is disconnected from a pressure source; one or more fluid conducting means in valved fluid conducting relationship with said canister and further in communication externally with an external reservoir; valve means for capturing said vacuum in said canister when the canister is disconnected from the vacuum source such that the vacuum may be controllably exposed to a fluid in another location;means for controllably releasing the captured vacuum in the canister so that the released vacuum suctions fluid from a reservoir through the fluid conducting means into the canister with the fluid thereby partially replacing the vacuum in the canister; pressurized fluid capturing means for capturing and holding fluid in said canister under pressure when the canister is disconnected from a pressure source, which pressurized fluid can be controllably transferred from the canister to an external reservoir; and means controllably releasing the pressurized fluid from within the canister for transferring fluid under positive pressure from said canister to a reservoir.