Filter for gas filtration

US4529419A · kind A · utility

Assignee

• Sartorius AG · DE

Inventors

• Horst Perl · Göttingen, DE
• Massoud Karbachsch · Göttingen, DE
• Gunter Pradel · Göttingen, DE
• Fritz Reulecke · Dransfeld, DE

Key dates

• Filing date: May 1, 1984
• Grant date: Jul 16, 1985
• Expiry date: May 1, 2004

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/7536
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter consisting of connected upper housing and lower housing parts and a hydrophobic flat filter disc for gas filtration sandwiched therebetween, intended in particular for an exchange between a container such as a liquid reservoir partially filled with liquid and the surrounding atmosphere. The upper housing part includes an integral channelled filter support having channels for communication into a gas inlet-outlet means of the said upper housing part. The lower housing part includes an integral, channelled filter support having channels for communication into a centrally disposed bore located at a right angle to the filter support and empties into the gas area of a liquid reservoir for instance. The filter support is constructed to prevent liquid from completely blocking the hydrophobic filter disc. The filter support of the lower housing forms a planar plane with an annular channel therein and a series of radially extending channels terminating at a centrally located bore. The channels having a controlled depth. The bore diameter is also controlled. The upper housing is dimensioned to provide a controlled distance for the filter from the filter support in the lower housing.