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A hydraulic unit for industrial trucks, comprising a motor pump unit which is directly attached to a tank, a reflux filter which has an elongate filter casing for a filtering element adapted to be introduced into the tank through an opening, a hose coupling, and an outlet opening, wherein the filter

A hydraulic unit for industrial trucks, comprising a motor pump unit which is directly attached to a tank, a reflux filter which has an elongate filter casing for a filtering element adapted to be introduced into the tank through an opening, a hose coupling, and an outlet opening, wherein the filtering element is disposed in the flow path between the hose coupling and the outlet opening, a reflux hose between the motor pump unit and the hose coupling, and a closure for the reflux filter, wherein the reflux hose extends within the tank and the hose coupling is disposed within the tank.

대표청구항 ▼

What is claimed is: 1. A hydraulic unit for industrial trucks, comprising: a tank; a motor pump unit attached to the tank by a valve casing; a reflux filter which has an elongate filter casing for a filtering element, the reflux filter being arranged inside the tank through an opening in the tank;

What is claimed is: 1. A hydraulic unit for industrial trucks, comprising: a tank; a motor pump unit attached to the tank by a valve casing; a reflux filter which has an elongate filter casing for a filtering element, the reflux filter being arranged inside the tank through an opening in the tank; the reflux filter having a hose coupling inlet and an outlet opening; a reflux hose (20) extending between the valve casing of the motor pump unit and the hose coupling inlet, the reflux hose and the hose coupling inlet being located within the tank; wherein the filtering element of the reflux filter is disposed in the flow path between the hose coupling and the outlet opening; whereby the reflux hose and the hose coupling inlet are both disposed within the tank. 2. The hydraulic unit according to claim 1, characterized in that the opening in the tank is adapted to be closed by a tank lid (42, 42a), the end of the filter casing (24) that faces the lid has a radial enlargement (28) to which the hose coupling is formed, and the tank lid (42) is adapted to be screwed onto the threaded socket (40) of the tank (16) such as to form a space (46) which connects the interior of the filter casing (24) to the hose coupling (32), between the end of the filter casing (24) that faces the tank lid and the tank lid (42). 3. The hydraulic unit according to claim 1, characterized in that the hose coupling (30) is provided at the end of the filter casing (24) that faces the interior of the tank (16a). 4. The hydraulic unit according to claim 1, characterized in that the filter casing (24) and hose coupling (30, 30a) are integrally formed from a plastic. 5. The hydraulic unit according to claim 1, characterized in that a sealing ring (44) is disposed between the tank lid (42) and a circular circumferential portion of the filter casing (24) and the free end of a threaded socket (40). 6. The hydraulic unit according to claim 1, characterized in that projections (52, 54) are provided on the filter casing (24) which interact with recesses or projections of the opening of the tank for a predetermined rotational position of the filter casing (24). 7. A hydraulic unit for industrial trucks, comprising: a tank; a motor pump unit attached to the tank by a valve casing; a reflux filter which has an elongate filter casing for a filtering element, the reflux filter being arranged inside the tank through an opening in the tank; the reflux filter having a hose coupling inlet and an outlet opening; a reflux hose (20) extending between the valve casing of the motor pump unit and the hose coupling inlet, the reflux hose and the hose coupling inlet being located within the tank; wherein the filtering element of the reflux filter is disposed in the flow path between the hose coupling and the outlet opening; whereby the reflux hose and the hose coupling inlet are both disposed within the tank; and whereby the opening in the tank is adapted to be closed by a tank lid (42, 42a), the end of the filter casing (24) that faces the lid has a radial enlargement (28) to which the hose coupling is formed, and the tank lid (42) is adapted to be screwed onto the threaded socket (40) of the tank (16) such as to form a space (46) which connects the interior of the filter casing (24) to the hose coupling (32), between the end of the filter casing (24) that faces the tank lid and the tank lid (42). 8. A hydraulic unit for industrial trucks, comprising: a tank; a motor pump unit attached to the tank by a valve casing; a reflux filter which has an elongate filter casing for a filtering element, the reflux filter being arranged inside the tank through an opening in the tank; the reflux filter having a hose coupling inlet and an outlet opening; a reflux hose (20) extending between the valve casing of the motor pump unit and the hose coupling inlet, the reflux hose and the hose coupling inlet being located within the tank; wherein the filtering element of the reflux filter is disposed in the flow path between the hose coupling and the outlet opening; whereby the reflux hose and the hose coupling inlet are both disposed within the tank; and whereby the filter casing (24) and hose coupling (30, 30a) are integrally formed.