Methods and breast pump devices for simultaneous pumping and feeding breastmilk in the nursing position and quantification of breastmilk consumption are provided. A breast pump device includes a nipple shield for receiving a nipple, a housing having a throughput aperture and a fluid path, the fluid path extending from the nipple shield to the throughput aperture, and a negative pressure source. In some embodiments, the housing further includes a gate to control the quantity of breastmilk displaced to a baby. In some embodiments, the gate operates to respond to the amount of breastmilk displaced to the baby, and thereby allows for quantification. In some embodiments, the quantity of breastmilk displaced is also recorded.

An overflow valve is built into a metering head for a metering pump used with aggressive media and under high pressure. The overflow valve follows the suction valve or expands it, and directly lowers a critical pressure that occurs in the metering head, using an overflow line. In this way, the safety of the arrangement is improved, and at the same time, less construction space is used up by the additional valve.

The present disclosure provides a control method of a fluid device. The control method includes the steps of (a) providing the fluid device, which includes a plurality of flow guiding units manufactured by a micro-electro-mechanical-system process; (b) dividing the flow guiding units into a plurality of groups, which are electrically connected to and controlled by a control module; and (c) generating a driving signal by the control module for a corresponding one of the groups, wherein the control module generates a high level signal to a specific one of the groups, so that the flow guiding units of the specific one of the groups are driven to transport fluid, and thereby controlling the fluid device to discharge a specific amount of fluid.

An ozone injector device comprising a housing having a water passageway through the housing, a corona tube disposed within the housing and configured to generate ozone, an ozone inlet fitting removably coupled to the water passageway, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube, and a spring-loaded clearing piston positioned to move into and out of the water passageway directly opposite the ozone inlet. The clearing piston is biased upwards, towards to the ozone inlet, and configured to prevent flow of ozone into the water passageway.

An ozone injector device comprising a housing having a water passageway through the housing, a corona tube disposed within the housing and configured to generate ozone, an ozone inlet fitting removably coupled to the water passageway, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube, and a spring-loaded clearing piston positioned to move into and out of the water passageway directly opposite the ozone inlet. The clearing piston is biased upwards, towards to the ozone inlet, and configured to prevent flow of ozone into the water passageway.

An ozone injector device comprising a housing, a corona tube disposed within the housing and configured to generate ozone, a check-valve removably coupled to the water passageway, a second end of the check-valve having a cavity with a movable float contained therein, an ozone inlet fitting removably coupled to the check-valve, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube such that ozone entering the water passageway through the ozone inlet fitting must pass through the check valve, and a spring-loaded clearing piston positioned to move into and out of the water passageway, the clearing piston being biased upwards, and configured to prevent flow of ozone into the water passageway.

An ozone injector device comprising a housing, a corona tube disposed within the housing and configured to generate ozone, a check-valve removably coupled to the water passageway, a second end of the check-valve having a cavity with a movable float contained therein, an ozone inlet fitting removably coupled to the check-valve, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube such that ozone entering the water passageway through the ozone inlet fitting must pass through the check valve, and a spring-loaded clearing piston positioned to move into and out of the water passageway, the clearing piston being biased upwards, and configured to prevent flow of ozone into the water passageway.

The present disclosure provides an aerosol delivery device and a liquid delivery and atomization assembly for use with an aerosol delivery device. In one implementation, the liquid delivery and atomization assembly comprises a liquid composition, an atomization assembly, and a liquid delivery component configured to transport at least a portion of the liquid composition to the atomization assembly. The liquid delivery component comprises at least one microchannel configured to deliver the portion of the liquid composition to the atomization assembly, and the microchannel includes a variable flow characteristic defined along at least a portion of the microchannel, the variable flow characteristic being configured to control the flow of the portion of liquid composition through the microchannel.

A pipetting device includes a housing, a valve assembly, and an actuator assembly. The housing includes a tip for receiving a capillary tube. The valve assembly includes a shuttle valve having a filling position and a dispensing position and a valve rod. The actuator assembly includes an actuator, a valve trigger, a piston mount, and an indexing mechanism. The actuator extends from the housing and has a push button coupled to a push rod. The valve trigger being configured to engage the valve assembly and includes an aperture configured to receive the piston mount therein. The indexing mechanism is configured to index a rotated position of the push button to a predefined volume of dispensed fluid.

A pipetting device includes a housing, a valve assembly, and an actuator assembly. The housing includes a tip for receiving a capillary tube. The valve assembly includes a shuttle valve having a filling position and a dispensing position and a valve rod. The actuator assembly includes an actuator, a valve trigger, a piston mount, and an indexing mechanism. The actuator extends from the housing and has a push button coupled to a push rod. The valve trigger being configured to engage the valve assembly and includes an aperture configured to receive the piston mount therein. The indexing mechanism is configured to index a rotated position of the push button to a predefined volume of dispensed fluid.