The present invention relates to systems and methods for preventing over pressurization in a fluid management system used in an integrated circuit (IC) device tester. The prevention of the over pressurization in the fluid management system is based on the use of a pressure relief valve coupled to the fluid management system.

A valve including a control assembly that is configured to control fluid flow through the valve, The control assembly includes a driving element and a valve member. The driving element is rotatable about an axis between a first operating state in which the driving element maintains contact between the valve member and a valve seat and a second operating state in which the driving element does not maintain contact between the valve member and the valve seat. The valve member is rotatable about the axis independent of the driving element when the driving element is in the second operating state.

The present disclosure provides an agricultural plant protection machine. The machine includes a frame, a liquid storage tank for storing liquid, a pipeline connected to the liquid storage tank, a nozzle, and a pump for pumping the liquid in the liquid storage tank to the nozzle. The pump includes a pump body including a liquid inlet, a liquid outlet, and a pressure relief port; a pressure relief device disposed at the pressure relief port, the pressure relief device including a valve and an elastic reset member, the valve being disposed corresponding to the pressure relief port for sealing the valve. In response to a hydraulic pressure in the pump body exceeding a preset pressure threshold, the valve is separated from the pressure relief port under the force of the liquid and the liquid flows out of the pressure relief port.

Methods and systems are provided for a lubricant system for an engine. In one example, the system includes external delivery lines coupling an oil reservoir of the engine to a plurality of cylinder head oil galleries, the engine also having internal oil passages. An amount of hydraulic fluid delivered via the external delivery lines is controlled by a pressure control valve having a vent line.

Methods and systems are provided for a lubricant system for an engine. In one example, the system includes external delivery lines coupling an oil reservoir of the engine to a plurality of cylinder head oil galleries, the engine also having internal oil passages. An amount of hydraulic fluid delivered via the external delivery lines is controlled by a pressure control valve having a vent line.

A system and method for protecting a lightweight pressure vessel capable of airborne and underwater use. The system includes an enclosure and a gas container that is capable of holding pressurized or liquefied gas in sufficient quantity to increase internal pressure of the pressure vessel, so that the internal pressure of the pressure vessel equals an external pressure of the pressure vessel. The system also includes a pressure relief device coupled to the enclosure. The pressure relief device is configured to release the pressurized or liquefied gas from the pressure vessel when the internal pressure exceeds the external pressure by a predetermined amount. The system also includes a gas supply mechanism coupled to the gas container, the gas supply mechanism being configured to allow gas from the gas container into order to increase the internal pressure of the pressure vessel until the internal pressure equals the external pressure.

A hydraulic circuit for a hybrid powertrain having an engine and an electric motor. The hydraulic control circuit includes a first pressure regulating valve configured to cooperate with a shift valve for selectively communicating a hydraulic fluid to a hydraulic piston actuator of a clutch assembly for engaging the engine to a driveline. The hydraulic control circuit further includes a second pressure regulating valve configured to selectively communicate a flow of hydraulic fluid to a cooling circuit for the cooling of the electric motor and to cooperate with a check valve and the shift valve to actuate the hydraulic piston actuator during a predetermined fail mode of the first pressure regulating valve, thus providing a limp-home mode by coupling the torque output from the engine to driveline of the vehicle.

The present invention relates to preparing dairy animal teats for being milked, and more particularly to teat preparation, rinsing, and milking that all take place in a milking machine teat cup liner. Such a method includes: applying a teat sanitizer to the teat; injecting air into the liner to force the teat sanitizer toward a waste milk line connected to the liner; pulsating the liner at a first pulsation rate; drawing a rinsing milk from the teat; directing the teat sanitizer, the air, and the rinsing fluid to the waste milk line; pulsating the liner at a second pulsation rate to draw additional milk from the teat; and directing the additional milk to a good milk line.

A valve includes an inlet and an outlet, a body including a first seat and a second seat, wherein the first seat and second seat are spaced apart from each other at a predetermined distance, a cavity in the body, a piston positioned in the cavity, wherein the piston rests against the first seat and the second seat when in the closed position, and a pilot ball adjacent the piston.

A hydrostatic valve arrangement for flushing pressure medium from a working line of a hydraulic circuit includes a flushing valve with a first flushing connection for connecting to a first working line and an output connection for connecting to a pressure medium sink. The arrangement also includes a pressure valve arranged in a pressure medium flow path of the arrangement from the output connection in the direction of the pressure medium sink. The pressure valve has a valve body on which a force equilibrium is formed. The force equilibrium includes a pressure equivalent that acts on the valve body in a direction that blocks the pressure medium flow path and an opening pressure that acts in a direction that opens the pressure medium flow path and is dependent on the pressure at the output connection. The arrangement further includes an adjusting device for shifting the force equilibrium.