Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
200 words
An electrohydraulic actuating drive for a valve that includes a valve housing and valve member received in the valve housing for movement along an axis in and opposite to a closing direction, comprising a compact drive block mounted on the valve housing and including a support structure that includes a storage receptacle for a low-pressure hydraulic fluid, including a carrying circumferential wall; a hydraulic actuating cylinder-and-piston unit including a cylinder mounted on said storage receptacle remotely from the valve housing and a piston rod extending through the storage receptacle concentrically to said circumferential wall and connected to the valve member; a force storage spring arranged in said storage receptacle and urging the valve member in the closing direction; and means for operating said hydraulic actuating unit mounted on said support structure and including an electro-hydraulic transducer, a hydraulic pump accommodated in said storage receptacle and having a low-pressure side connected to said storage receptacle and high-pressure side, an electric motor connected to said hydraulic pump for driving the same, and at least one hydraulic pressure storage connected to said high-pressure side of said hydraulic pump and to said hydraulic actuating unit and at least partially accommodated in said storage receptacle.
Claim 2
Dependent Claim
200 words
An electrohydraulic actuating drive for a valve that includes a valve housing and valve member received in the valve housing for movement along an axis in and opposite to a closing direction, comprising a compact drive block mounted on the valve housing and including a support structure that includes a storage receptacle for a low-pressure hydraulic fluid, including a carrying circumferential wall; a hydraulic actuating cylinder-and-piston unit including a cylinder mounted on said storage receptacle remotely from the valve housing and a piston rod extending through the storage receptacle concentrically to said circumferential wall and connected to the valve member; a force storage spring arranged in said storage receptacle and urging the valve member in the closing direction; and means for operating said hydraulic actuating unit mounted on said support structure and including an electro-hydraulic transducer, a hydraulic pump accommodated in said storage receptacle and having a low-pressure side connected to said storage receptacle and high-pressure side, an electric motor connected to said hydraulic pump for driving the same, and at least one hydraulic pressure storage connected to said high-pressure side of said hydraulic pump and to said hydraulic actuating unit and at least partially accommodated in said storage receptacle.
Claim 3
Dependent Claim
37 words
The electrohydraulic actuating drive as defined in claim 1, wherein said storage receptacle has an end wall remote from the valve housing; and wherein said cylinder of said actuating unit is directly connected to said end wall.
Claim 4
Dependent Claim
35 words
The electrohydraulic actuating drive as defined in claim 1, wherein said support structure further includes a base plate arranged next to the valve housing; and wherein said storage receptacle is connected to said base plate.
Claim 5
Dependent Claim
43 words
The electrohydraulic actuating drive as defined in claim 3, wherein said base plate has a region radially protruding beyond said circumferential wall of said storage receptacle; and wherein said hydraulic pressure storage is connected to said radially protruding region of said base plate.
Claim 6
Dependent Claim
40 words
The electrohydraulic actuating drive as defined in claim 1, wherein said support structure further includes a cantilever connected to said circumferential wall of said storage receptacle; and wherein said electric motor and said hydraulic pump are arranged on said cantilever.
Claim 7
Dependent Claim
52 words
The electhrohydraulic actuating drive as defined in claim 1, wherein said hydraulic pump, said storage receptacle, said hydraulic pressure storage, and said hydraulic actuating unit are incorporated in a hydraulic circuit; and wherein said circumferential wall of said storage receptacle has internal channels constituting as least a part of said hydraulic circuit.
Claim 8
Dependent Claim
28 words
The electrohydraulic actuating drive as defined in claim 6, wherein said cylinder of said actuating unit has hydraulic connecting channels therein constituting another part of said hydraulic circuit.
Claim 9
Dependent Claim
24 words
The electrohydraulic actuating drive as defined in claim 1, wherein said circumferential wall of said storage receptacle has cooling ribs at its external periphery.
Claim 10
Dependent Claim
41 words
The electrohydraulic actuating drive as defined in claim 8, wherein said cooling ribs protrude from said external periphery of said circumferential wall of said storage receptacle substantially in radial direction, and extend substantially in the axial direction of said circumferential wall.
Claim 11
Dependent Claim
38 words
The electrohydraulic actuating drive as defined in claim 9, and further comprising a lining surrounding said cylinder of said hydraulic actuating unit with a spacing therefrom; and means for forcing cooling air through said spacing, including a blower.
Claim 12
Dependent Claim
48 words
The electrohydraulic actuating drive as defined in claim 10, wherein said lining is so arranged adjacent to said cooling ribs as considered in the axial direction that the cooling air flowing through said spaces also flows between said cooling ribs of said circumferential wall of said storage receptacle.
Claim 13
Dependent Claim
30 words
The electrohydraulic actuating drive as defined in claim 1 for use on a valve housing including a valve lantern, wherein said compact drive block is mounted on said valve lantern.