Fluid ejection device

US7517056B2 · kind B2 · utility

Assignee

• HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

• Elizabeth A. Fellner · San Diego, US
• James Pingel · San Diego, US
• Matthew Giere · San Diego, US
• Satya Prakash · San Diego, US
• David W. Jenkins · North Aurora, US
• James A. Feinn · San Diego, US
• Arun Agarwal · Dallas, US
• Julie J. Cox · Albany, US
• Jules G. Moritz, III · Corvallis, US
• Ozgur Emek Yildirim · Bellevue, US

Key dates

• Filing date: Feb 13, 2006
• Grant date: Apr 14, 2009
• Expiry date: Jan 22, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2002/14403
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A fluid ejection device includes a fluid chamber, a fluid restriction communicated with the fluid chamber, and a fluid channel communicated with the fluid restriction. The fluid restriction has a fluid restriction parameter defined as (2*W+2*H)*L/(H*W), wherein W is a width of the fluid restriction, H is a height of the fluid restriction, and L is a length of the fluid restriction. As such, the fluid restriction parameter is in a range of 1.5 to 5.75.