Dosing Pump Sleeve With Orthogonal Elongated Ports

The invention applies local quality by making the ports elongated specifically in the direction orthogonal to the plunger reciprocation direction, while other parts of the pump structure remain conventional. This localized modification to the port geometry provides precise control over fluid flow timing and dosage without requiring complex changes to the entire pump structure, thereby achieving high dosing accuracy while maintaining manufacturing simplicity.

The elongated port configuration focuses manufacturing precision requirements on a specific geometric feature (the port elongation in the orthogonal direction) rather than requiring high precision across all pump components. This localized approach ensures consistent dosing performance between different pumps while keeping the overall manufacturing process and costs relatively low, as only the port geometry requires precise control.

The port is elongated specifically in the direction orthogonal to the plunger reciprocation direction, creating a localized geometric feature that precisely controls the timing and precision of dosing start. This targeted modification to port geometry provides superior dosing control without requiring complex mechanisms or additional components, as the elongation itself serves as the precise control feature.

Harder materials are applied specifically to critical components such as the sleeve and plunger that directly interact with the fluid and define dosing geometry, while other non-critical parts of the pump can be made from less expensive materials. This selective material application ensures high dosing accuracy and reproducibility where needed, while controlling overall manufacturing costs by not over-engineering non-critical components.