The invention discloses a hydraulic control system of a leveling hydraulic cylinder of a loading head, characterized by comprising a hydraulic pump, a two-position three-way electronic control reversing valve, a three-position four-way electronic control reversing valve, a three-position four-way cam valve and a hydraulic cylinder. The invention not only can perform leveling by using the electric control system, but also comprises the hydraulic cam valve controlling the hydraulic cylinder for self-leveling, and the two leveling manners can be independently used or switched mutually, thus achieving a better leveling effect.

The invention concerns a distribution valve for the use in the feed or return of a medium circuit, with a housing (1) forming the feed line or the return line, respectively, a branch line (2) branching off from the housing (1) and an adjusting unit (3) for adjustment of a flow of medium through the branch line (2), which adjusting unit is formed separately from the housing (1) and opposite to the branch line (2) is arranged at the housing (1) and protrudes the housing wall. The adjusting unit (3) comprises an adjusting spindle (4), the axial position of which with respect to a component (5) of the adjusting unit (3) which is connected to the housing (1) can be changed by twisting it relative to said component (5), thereby changing the flow rate. The valve is designed in such a manner that an axial movement of the adjusting spindle (4) relative to the component (5) in direction towards the branch line (2) effectuates an increase of the flow rate through the branch line (2). Furthermore, adjustable stopper means are present, by means of which, through abutting of a first abutment face (7) which is connected with the adjusting spindle (4) against a second abutment face (8) which is connected with the housing (1), an axial movement of the adjusting spindle (4) with respect to the component (5) in direction towards the branch line (2) can be limited at a specific axial position, for limiting the maximum flow rate through the branch line (2) that can be adjusted.

The invention makes it possible to provide in a cost-efficient manner very compact and simple designed distribution valves at which a once adjusted limitation of the maximum flow rate is preserved in case of a temporarily closing or decrease of the flow rate.

A check valve is disclosed. The check valve, which is installed in a modulator block of a brake system having a flow path forming a hydraulic circuit, may include: a sleeve housing whose both ends open, the sleeve housing having a discharge flow path, wherein at least one outlet is formed in the discharge flow path; a pair of adaptors respectively coupled with both open ends of the sleeve housing, wherein in one end of each adaptor, an inlet connected to a flow path of the modulator block is formed, and in the other end of the adaptor, a valve seat connected to the discharge flow path is formed; an elastic member disposed in the discharge flow path; and a pair of opening and closing members respectively supported on both ends of the elastic member, and disposed to selectively contact each valve seat of the pair of adaptors.

A controlling mechanism for a three-way valve includes a transmission axis movably received in the valve and having first teeth formed on a free end thereof. A rotation axis is movable and intermittently rotatable in the valve and having second teeth integrally formed on the rotation axis to correspond to the first teeth. A spring is received inside the valve to provide a recoil force to the rotation axis to maintain the second teeth of the rotation axis to be in contact with the first teeth of the transmission axis so that movement of the transmission drives the rotation axis to move and rotate simultaneously for selectively blocking the inlet of the valve.

A composite valve provided in a solenoid valve includes a sliding hole having a first port and a second port, a sub-port communication passage branched from the sliding hole and having a third port, a first valve body allowing only the flow of hydraulic oil from the first port to the second port, and a second valve body allowing only the flow of the hydraulic oil from the third port to the second port. The first valve body and the second valve body are displaced along the sliding hole formed to be straight. When the first valve body is opened, the hydraulic oil is introduced from the first port to the second port through a through hole provided in the second valve body.

A valve device for a cooling water system of a motor vehicle, with a housing including a first connection and a second connection for a first liquid circuit, and a third connection and a fourth connection for a second liquid circuit, wherein the first connection is permanently fluidically connected to the second connection, and with a valve unit including a movably mounted valve element with which a thermally activatable spring element is associated, and which opens a connection between the third connection and the fourth connection in a first end position and cuts off the connection in a second end position. The thermally activatable spring element is arranged in a chamber located between the first connection and the second connection, which is permanently cut off from the third and the fourth connection and which preloads the valve element in the direction of the second end position.

A valve assembly for a tire pressure management system includes a housing. A first chamber (32) is provided in the housing. A second chamber (38) is provided in the housing. The second chamber is selectively in fluid communication with the first chamber. A third chamber (44) is provided in the housing. The third chamber is selectively in fluid communication with the second chamber. A deflate piston (120) is at least partially provided in the third chamber and the second chamber. The deflate piston (120) selectively permits or prevents fluid communication between the second chamber and the third chamber. An inflate piston (72) is attached to the deflate piston (120). The inflate piston (72) is at least partially provided in the second chamber and the first chamber. The inflate piston (72) selectively permits or prevents fluid communication between the first chamber and the second chamber. At a first pressure, the second chamber is in direct fluid communication with the first chamber and, at a second pressure, the second chamber is in direct fluid communication with the third chamber. The second pressure is greater than the first pressure and the first pressure is greater than an initial pressure.

A non-return valve with twin plugs is connected to a fluid reservoir and equipment that can receive a small overflow quantity essentially in the gaseous state from the reservoir. This occurs when the primary valve is open. In the case of a larger overflow essentially in the liquid state, the openings are switched over to evacuate the overflow to another outlet branch of the non-return valve, without it being transferred to the equipment. The invention is useful in an oil lubrication circuit, in which a hypothetical fuel leak into the oil could cause the oil reservoir to overflow into the non-return valve and in which a significant flow of liquid to the equipment must be avoided; oil outlet through the other branch of the outlet can remain in a reservoir provided with a drain system.

The invention relates to a mixing apparatus (1) with a main line (3), in which a liquid (F) flows along a direction of flow (FR), and a secondary line (9). The main line (3) has an inlet (4), an outlet (5) for discharging the liquid (F) conducted through the main line (3), and a three-way valve (8) at a beginning (6) and at an end (7). The secondary line (9) is connected via the three-way valves (8) to the main line (3) and, together with the main line (3), forms a mixing circuit (MKL). The liquid (F) can be pumped with a pump (11) through the main line (3) and through the secondary line (9) in the mixing circuit (MKL). In addition, at least one additive inlet opening (26) is provided on the main line (3) for adding an additive into a mixing zone (M) of the main line (3). The mixing apparatus (1) furthermore has at least one swirling means (13) in the main line (3). The invention moreover relates to a washing machine having such a mixing apparatus (1) and to a method for intermixing an additive with a liquid (F).

A slurry injection system has a plurality of slurry valves fluidically coupled to first and second elongated tanks. In the first state, the slurry valves communicate high pressure slurry from the second volume to a site and communicate low pressure slurry to the fourth volume. In the second state, the slurry valves communicate low pressure slurry to the second volume and high pressure slurry from the fourth volume to the slurry injection site and in the intermediate state communicating high pressure slurry simultaneously from the first elongated tank and the second elongated tank to the slurry injection site. In the first state clear fluid valves fluidically communicate high pressure clear fluid to the first volume and low pressure clear fluid from the third volume and, in a second state, communicate low pressure clear fluid from the first volume and high pressure clear fluid to the third volume.