The present invention relates to a hydraulic switch arrangement and a fluid switch for incorporating into a hydraulic switch arrangement that may be included in a hydraulic circuit for inhibiting flow of hydraulic fluid through a hydraulic circuit in the event of movement of an apparatus or platform from a stable to an unstable condition. Such platforms or apparatus may include for example, cranes, excavators, teletrucks and forklift trucks and roll over incidents of such machinery is common leading to numerous fatalities. Aspects of the present invention ensure fast switching in the event of a transfer from a stable to an unstable condition.

The invention relates to a safety device (2) for interrupting a gas flow within a gas-conducting device (1). An inertia body (32) moves from a resting position in the case of an acceleration above a specifiable acceleration threshold value acting on it. Due to the movement, the inertia mechanism (3) activates a reaction mechanism (4), which interrupts the gas flow within the gas-conducting device (1). In this process, the safety device (2) is free of gas flowing through it.

A leakage mitigation system to trigger a preventive action against detected leakage from a liquid enclosure, includes a leakage detection device disposed along base of the liquid enclosure. The system includes an absorbent that actuates the leakage detection device from a first state to a second state based on a volume of liquid leaked from the liquid enclosure. The device includes a valve coupled to an inlet pipe of the liquid enclosure and configured to allow flow of liquid through the inlet pipe in an open condition thereof and restrict flow of liquid through the inlet pipe in a closed condition thereof. The system further includes a shut-off actuator coupled to the valve and configured to actuate the valve from the open condition to the closed condition in response to the device being actuated from the first state to the second state.

A check valve can include a valve body defining a valve bore, the valve body comprising an annular body and a cross member secured to and extending in a radial direction across the valve bore from the annular body on one side of the valve body to the annular body on an opposite side of the valve body, the valve bore at the cross member divided into more than one portion by the cross member; a position block extending from the cross member; a pair of valve members, each valve member of the pair of valve members positioned within the valve body and configured to rotate between open and closed positions; and a pivot pin positioned within the valve body and extending through the position block and each valve member of the pair of valve members, the pivot pin being supported only by the position block.

A check valve for a fluid distribution system can include a valve body defining a valve inner cavity defining a valve bore extending from a first axial end to a second axial end; a position block secured to the valve body and defining a pivot bore; a pivot pin positioned within the valve body and extending through the pivot bore of the position block; and a valve member positioned within the valve body and configured to rotate about the pivot pin from an open position to a closed position, the valve member configured to remain in the open position as long as a fluid in the fluid distribution system is moving in a positive flow direction of the check valve, the valve member further configured to close when the fluid is moving in a negative flow direction of the check valve.

Valve device based on a closing disc formed by disc parts which are movably arranged on activation bolts extending between two stop discs, and where movement of the activation bolts or disc parts in longitudinal direction of the valve device results in that the relative position between the disc parts are changed and the valve device opens or closes.

A fluid transportation apparatus includes a first suction pipe having a first intake opening and a second suction pipe having a second intake opening. The first and second suction pipes are attached to a vessel on opposite sides to move in rolling motion. The first intake opening is disposed in a fluid reservoir at a position lower than the second intake opening and a valve device moves toward a maximally opened position for a first proximal end of the first suction pipe and to move toward a maximally closed position for a second proximal end of the second suction pipe, as the first and second suction pipes move with the vessel in a first rolling direction of the rolling motion. The intake openings reverse roles and the proximal ends reverse roles, as the vessel moves in a second rolling direction of the rolling motion opposite from the first rolling direction.

A trip cock valve for a brake system on a rail car includes a valve body that defines an inlet, a chamber downstream from the inlet, and an outlet downstream from the chamber. A piston is inside the chamber. A valve member operably connected to the piston has a first position that prevents fluid flow through the outlet and a second position that permits fluid flow through the outlet. A lever is operably engaged with the valve member to move the valve member from the first position to the second position. A valve position indicator downstream from the inlet is in fluid communication with the inlet when the valve member is in the second position.

Various aspects of the invention are directed to a triggering device for a quickly triggering extinguishing system for explosion suppression. In some embodiments of the present disclosure, the triggering device may include a pawl body having a pawl flank, a catch, at least one electromagnet to transmit an electromagnetic field, and a sliding pin. The sliding pin triggers an extinguishing system for explosion suppression by movement from a blocking position into a release position. In the blocking position, the sliding pin is pushed against the pawl flank of the pawl body by means of the catch and is held in the blocking position by said pawl flank. The pawl body releases the engagement of the catch and the pawl flank, and thereby releases the sliding pin, in response to the at least one electromagnet exerting the electromagnetic field on the pawl body.

Embodiments for an automatic fluid shut off device having a float disposed in a fluid catch basin attached to a first end of a flexible cable movable in an opposite direction of rising fluid in the catch basin; a second flexible cable end extending to a fluid supply base and terminating adjacent to a restrained spider assembly, the spider assembly configured to be rotationally displaceable upon a force by the second flexible cable end in response to a rising fluid in the catch basin; the spider assembly pivotably connected to a shut-off valve; and the shut off valve retained in an open position while the spider assembly is restrained, and under a rotational force to close the shut-off valve upon activation of the spider valve in response to the force by the second flexible cable end.