초록 ▼

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

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.

대표청구항 ▼

A vented cover assembly adapted for attachment to an aperture in a wall of a fluid reservoir, so as to close the aperture while allowing filtered air to pass into and out of the fluid reservoir, the cover assembly comprising in combination: a socket ring adapted for clamping attachment to the edge o

A vented cover assembly adapted for attachment to an aperture in a wall of a fluid reservoir, so as to close the aperture while allowing filtered air to pass into and out of the fluid reservoir, the cover assembly comprising in combination: a socket ring adapted for clamping attachment to the edge of said aperture, the socket ring including a tubular wall portion defining a substantially cylindrical bore of a diameter which is smaller than the width of the aperture, the axis of said bore being oriented substantially perpendicular to the reservoir wall and defining a rotational center axis for the cover assembly; a generally pot-shaped filter casing having a bottom wall and a adjoining substantially cylindrical side wall cooperating with the bore of the socket ring so as to be insertable therethrough and to extend to the inside of the fluid reservoir, with the bottom wall located at the inner axial end of the side wall; first bayonet-type locking means defined between the socket ring and the filter casing, for the removable attachment of the filter caisng to the socket ring; a removable cap at the axially outer end of the filter casing; second bayonet-type locking means defined between the filter casing and the cap for the removable attachment of the cap to the filter casing; and a filter cartridge arranged inside the filter casing and positioned between the bottom wall of the filter casing and the removable cap, the filter cartridge having an air-permeable filter wall; and wherein the filter casing has in one of its walls a vent opening for the flow of air between the inside of the fluid reservoir and one side of the filter wall ofthe filter cartridge, and the cap has a vent opening for the flow of air between the outside of the fluid reservoir and the other side of said filter wall.