| 摘要 |
<p><i>In ovo</i> injection delivery devices include a housing; an extendable and retractable injection needle movably disposed within the housing, wherein the needle is configured to deliver a predetermined dosage of a substance into an egg; and a pump assembly disposed within the housing, wherein the pump assembly is configured to deliver a predetermined amount of a substance to the needle for injection into an egg. A pneumatic logic circuit controls the injection needle and pump assembly via pressurized air or other fluid. The pneumatic logic circuit controls priming of the pump assembly with a substance when the injection needle is in a retracted position and controls dispensing of the substance from the pump assembly to the injection needle when the injection needle is in an extended position. A sensor that detects the presence of an egg within an egg flat (or other carrier) beneath the<i> in ovo</i> injection delivery device.</p> |
