Patent ID: 8667996

Claim:
A fluid transfer device comprising: a metering reservoir; a manifold forming at least part of a first channel, the first channel fluidly connected with the metering reservoir, the first channel comprising a first cannula extending from the manifold, the manifold forming at least part of a second channel, the second channel fluidly connected with the metering reservoir, the second channel comprising a second cannula extending from the manifold; a third channel extending through the manifold and comprising a third cannula having a first end proximate a distal end of the first cannula and a second end proximate a distal end of the second cannula; a first check valve disposed within the first channel; and a second check valve disposed within the second channel, wherein the distal end of the first cannula and the first end of the third cannula are configured to fluidly couple to a supply reservoir and the distal end of the second cannula and the second end of the third cannula are configured to fluidly couple to a fill reservoir, and wherein when the distal end of the first cannula and the first end of the third cannula are fluidly coupled to the supply reservoir, and the distal end of the second cannula and the second end of the third cannula are fluidly coupled to the fill reservoir, expanding the metering reservoir draws fluid from the supply reservoir into the metering reservoir, compressing the metering reservoir expels the fluid from the metering reservoir into the fill reservoir and expelling the fluid into the fill reservoir displaces air in the fill reservoir into the supply reservoir.