Vented cover assembly with filter insert for fluid reservoir

US4678572A · kind A · utility

Inventor

• Karl Hehl · Usedom, DE

Key dates

• Filing date: Oct 21, 1986
• Grant date: Jul 7, 1987
• Expiry date: Oct 21, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2201/4015
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A vented cover assembly for a hydraulic fluid reservoir comprising a socket ring mountable in a large opening of the reservoir wall, a filter casing attachable to the socket ring by means of a first bayonet lock, and a cap attachable to the filter casing by means of a second bayonet lock, following insertion of a filter cartridge into the filter casing. The second bayonet lock has a higher release resistance than the first bayonet lock, for the removal of the filter casing, filter cartridge and cap from the socket ring as a closed filter subassembly. Air flowing into or out of the fluid reservoir is strained by the filter cartridge.