Hydraulic valve system
AssigneeSauer-Danfoss ApS
InventorMartin Raadkjaer Joergensen
Life of this patent
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Abstract
A hydraulic valve system (1) has a supply connection arrangement, having a high-pressure connection (P) and a low-pressure connection, with a working connection arrangement, having two working connections (A, B), with a control valve (3), which is arranged between the supply connection arrangement and the working connection arrangement, and with a non-return valve (24, 28) for each working connection (A, B). The valve being arranged between the control valve (3) and the working connection arrangement. A tappet (36) mechanically opening the valve element (25, 29) of said non-return valve.
Claims19
A hydraulic valve system with a supply connection arrangement, having a high-pressure connection and a low-pressure connection, with a working connection arrangement, having two working connections, with a control valve, which is arranged between the supply connection arrangement and the working connection arrangement, and with a non-return valve for each working connection, said valve being arranged between the control valve and the working connection in question, a tappet having a uniform diameter and mechanically opening a valve element of said non-return valve, wherein the uniform diameter of the tappet is less than a diameter of the valve element and wherein, the tappet (36) has a side facing away from the valve element (25, 29), on which side the tappet ends in a pressure chamber (38, 39), which can be acted upon with pressure.
A hydraulic valve system with a supply connection arrangement, having a high-pressure connection and a low-pressure connection, with a working connection arrangement, having two working connections, with a control valve, which is arranged between the supply connection arrangement and the working connection arrangement, and with a non-return valve for each working connection, said valve being arranged between the control valve and the working connection in question, a tappet mechanically opening a valve element of said non-return valve, wherein, the tappet (36) has a side facing away from the valve element (25, 29), on which side the tappet ends in a pressure chamber (38, 39), which can be acted upon with pressure, wherein the valve element (25, 29) can be opened both mechanically by means of the tappet (36) and hydraulically, wherein the valve element is opened mechanically when pressure within the pressure chamber acts upon the side of the tappet facing away from the valve element to displace the tappet toward the valve element such that the valve element is lifted from a valve seat, and wherein one of the two working connections is closed.
Dependencies are inferred from the claim text.