Abstract: There is provided a method of measuring liquid volume in a sealed container of a breast pump of known volume comprising liquid and gas. The method includes a measurement phase, measuring the volume of gas in the container by changing a first parameter of the gas by a known amount. The method also includes measuring a change in a second parameter of the gas; calculating the volume of gas in the container using the measured change and a predetermined operation equation; and determining the volume of liquid in the container based on the calculation.

Abstract: An in-bra wearable breast pump is provided. The breast pump includes an air pump system for generating a base level vacuum and a pumping vacuum, a breast shield for receiving a user's breast and having a first side and a second side, a first channel for drawing the base level vacuum on the first side of the breast shield, and a second channel for drawing the pumping vacuum on the second side of the breast shield.

Abstract: In an ignition assembly for a flare vent having an open terminal end for venting waste gases, a hollow tubular stripper is located adjacent a generally upright exterior wall of the flare vent and has a lower opening and an upper opening proximate to the terminal end of the flare vent. A conduit for diverting some of the waste gases from the flare vent to the stripper is located below both the upper opening of the stripper and the terminal end of the flare vent. A pilot has an ignition end to ignite the diverted waste gases in the stripper to produce an ignition flame at the upper opening of the stripper, which in turn ignites the waste gases exiting the terminal end of the flare vent. The pilot is housed in a sleeve having an open first end for receiving the pilot and an open second end for exposing the ignition end of the pilot to the waste gases in the stripper.