Fluid dispense tips

Details Fluid dispense tips Fluid dispense tips

2005-05-24

2005-05-24

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including supplemental gas shaping or shielding jet

Air shield surrounds projected airstream

C239S289000

Reexamination Certificate

active

06896202

ABSTRACT:
A fluid dispense tip includes a bevel at an opening to reduce the amount of surface tension, or “land”, at the opening. The bevel is formed by grinding in a longitudinal direction such that any tooling scars resulting from the grinding operation are likewise longitudinally oriented, further reducing the amount of surface tension in the tip, thereby leading to heightened dispensing accuracy. The tip may be machined from stock as a unitary piece, to increase its lifetime, and may be formed with a bore of a relatively large diameter that is tapered down to a smaller diameter near the tip opening, to allow for delivery of fluid through the tip body at a decreased pressure. A cleaning tool may be provided for removing residual material from the inner surfaces of the tip. A removable liner sleeve may be provided within the bore to reduce the effective inner diameter of the dispense tip.

REFERENCES:
patent: 4408699 (1983-10-01), Stock
patent: 4917274 (1990-04-01), Asa et al.
patent: 5177901 (1993-01-01), Smith
patent: 5985216 (1999-11-01), Rens et al.
patent: 6547167 (2003-04-01), Fugere

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