DE1854437U - FILTERS SWITCHED ON IN A LIQUID CIRCUIT. - Google Patents

Description

"Filter that can be switched into a liquid circuit" The invention relates to a fluid circuit, in particular an oil circuit Internal combustion engine, switchable filter with an exchangeable filter insert, which has a diaphragm ring disk designed as part of a check valve.

The membrane ring disc prevents the oil from flowing out of the filter housing when the circuit is at a standstill or when the internal combustion engine is at a standstill.

It has already been proposed that the diaphragm ring washer on the Put the filter insert on loosely. A disk attached in this way is, however, when Easily forget to replace the filter insert. For this reason one already has proposed the membrane ring disk with the cover disk of the filter insert to be inseparably connected to one another by a flare connection. Here you are However, it depends on the choice of material for the cover disc of the filter insert, and with the diaphragm ring disc in place, the cover disc still needs to be reworked of the filter is required.

The invention has a simplified, advantageous connection of the diaphragm ring disc with the filter insert to the goal. This is achieved according to the invention by that the diaphragm washer with the help of a flexible retaining ring is attached to a cover ring of the filter insert.

In this training one is of the material of the cover plate of the filter insert, as these are either made of metal, cardboard, plastisol or Like. Material can exist.

Deforming reworking is also no longer necessary, but rather the retaining ring can simply be inserted into the cover plate because of its flexibility and holds the membrane ring disc to be connected to the cover disc securely fixed.

If the retaining ring is removable from the filter unit, it can be removed from a The used filter insert together with the membrane washer can be easily removed and put on a new replacement filter insert.

However, in cases where there is damage due to the lack of a diaphragm ring disc could occur, the value of a diaphragm ring disc and a retaining ring far exceed it, it can be purpose. be moderate, the filter element together with the retaining ring and to form the diaphragm ring disc as a disposable unit.

A preferred development of the invention is that the resilient retaining ring is approximately U-shaped when seen in cross section and at the same time serves as a sealing ring for the outlet of the filter element. The retaining ring can open these quietly perform two functions and are essential for making the filter cheaper contribute.

In the drawing is an embodiment of the subject matter of Invention shown schematically.

On the engine block of an internal combustion engine, not shown, is a Head piece 1 attached, which has a lubricating oil inlet 2 and a lubricating oil outlet 3. The head piece 1 is used to fasten a housing that accommodates a filter insert 5 4, for example with the help of a bayonet lock happen can. A sealing ring 6 is inserted between the head piece 1 and the housing 4.

The filter insert 5 is designed as a star-shaped folded paper filter. On its underside, it has a full cover plate 7 which is shaped like a segment of a sphere Has indentation 8 which is adapted to an indentation in the housing 4. The cover panel 7 is attached to an inner frame 9 and curved inward disc 10 supported.

On the inner frame 9 is an upper, a central bore having Disk 11 fastened against which a cover ring disk connected to an outer frame 12 13 is applied, the center bore of which corresponds to the center bore of the disk 11.

In the center bores of the ring disks 11 and 13 is a retaining ring 14 made of a flexible material, in particular rubber or a rubber-like material Plastic. The retaining ring 14 is U-shaped when viewed in cross section and has on its inner wall two beads 15 which seal against the through the retaining ring 14 protruding central tube extension of the head piece 1 rest. The retaining ring 14 takes the two annular disks 11 and 11 in its outer annular groove 13 and a diaphragm ring disk 16, which is resilient when installed is supported against the end face of the head piece 1 and together with this one the Forms a non-return valve preventing lubricating oil from flowing back when the engine is at a standstill.

To remove the filter insert 5, the housing 4 is removed from the head piece 1 removed, and by pulling off the filter insert 5, the retaining ring 14 of the central pipe socket of the head piece 1 separated. By postponing a new one with a retaining ring 14 and a membrane ring disk 16 provided filter insert 5 on the pipe socket and after placing the housing 4 on that Head piece 1, the filter is ready for operation again.

Since the retaining ring 14 of the annular discs 11 and 13 together with the If the membrane disk 16 is removable, it can be used together with the membrane ring disk 16 can be placed on a new filter element that replaces the ineffective one the filter insert that has become.

Claims (3)

Protection claims: 1. In a fluid circuit, in particular in an oil circuit of an internal combustion engine, insertable filter with an exchangeable one Filter insert, which is a membrane ring disk designed as part of a check valve has, characterized in that the membrane ring disc (16) with the help of a resilient retaining ring (14) on a cover ring disc (13) of the filter insert (5) is attached. 2. Filter according to claim 1, characterized in that the resilient Retaining ring (14) is approximately U-shaped when seen in cross section and at the same time serves as a sealing ring for the outlet connection (3) of the filter insert (5). 3. Filter according to claims 1 and 2, characterized in that the flexible retaining ring (14) as a slip-on ring on the outlet connection (3) forming pipe socket and at least one sealing bead on its inner wall (15).