Method and apparatus for modifying pressure within a fluid dispenser

US8147773B2 · kind B2 · utility

Assignee

• Ventana Medical Systems, Inc. · US

Inventors

• Charles D. Lemme · Tucson, US
• Vincent R. Rizzo · Indianapolis, US
• Bobbi Druyor-Sanchez · Mesa, US
• Anthony Ford · Tucson, US
• Bronwen Heilman · Tucson, US
• Darin McDaniel · Tucson, US
• Brian McGraw · Tucson, US
• Stephen Mead · Avon, US
• William Richards · Tucson, US
• Wayne Showalter · Tucson, US

Key dates

• Filing date: Mar 17, 2011
• Grant date: Apr 3, 2012
• Expiry date: Mar 17, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2035/1034
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A fluid dispenser useful in automated biological reaction systems comprising a barrel having a reservoir chamber, the barrel having an upper portion and a lower portion, a cap located on top of the upper portion of the barrel and connected to the reservoir chamber, the cap having an external surface with at least one hole therethrough, a valve comprising a biasing member and a hole sealer, the valve being located in the hole in the cap at the point where a downward force is applied against the cap, a coupler having a dispense chamber, the coupler being coaxial with the barrel and wherein the barrel lower portion moves into the dispense chamber during dispensing of fluid, and a vent located between the cap and the reservoir chamber, the vent including a vent opening and a vent material composed of oliophobic material.