Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.

Abstract: An earthquake actuated device includes a flapper-valve adapted to block a gas flow and a micro switch for closing or opening a circuit. A seismic sensor responds to accelerations characteristic of an earthquake. The sensor cooperates with a magnet in a flapper arm to hold the flapper-valve open. When the sensor experiences sufficient motion, the flapper arm is released and the flapper-valve falls onto a seat, thereby closing and blocking the gas flow. The closing of the flapper-valve is further coupled into an actuation of the micro switch, thereby opening or closing the circuit.

Abstract: A fully automatic valve closing apparatus that is responsive to movement between the apparatus and a substantially fixed structure, wherein the apparatus includes a supporting frame on which is mounted a pressure activated actuator which is adapted to be fixedly mounted to a main in-line valve of a fluid flow system such as a gas or water utility line. A gas pressure activating system is operably interconnected between the fixed structure by means of a tripping mechanism defining a universal linkage device that removably engages a pair of pressure control valves. The main valve is moved to a closed position when movement occurs between the valve closing apparatus and the substantially fixed structure to which the universal linkage is movably attached. The apparatus which contains no electrical components is pneumatically operated from a self-contained power source.

Abstract: A gas actuated valve system includes a gas switch disposed in a primary gas circuit upstream of a gas driven actuator. The switch is movable to an open position when a pilot gas is supplied under pressure to the gas switch through a pilot circuit, and is movable to a closed position when the pilot pressure is released. A seismic valve coupled to the pilot circuit senses seismic activity and releases pilot gas pressure, thus moving the gas switch to the closed position, when seismic activity is detected.

Abstract: An air actuated valve system for shutting off fluid flow in a fluid conduit includes a seismic valve disposed in a seismic air circuit which is coupled to a primary air circuit. The primary air circuit delivers air at a high pressure to an air driven actuator which maintains a shut off valve in a fluid conduit in an open position. The high air pressure flows through an air switch which is operationally open and coupled to the seismic air circuit such that when the seismic valve is closed a pilot air pressure is prevented from flowing to the air switch. In the absence of the pilot air pressure, air pressure is bled from the air switch, causing the air switch to move from an open to a closed position, thus preventing air from flowing to the air actuator.

Abstract: An air actuated valve system for shutting off fluid flow in a fluid conduit includes a seismic valve disposed in a seismic air circuit which is coupled to a primary air circuit. The primary air circuit delivers air at a high pressure to an air driven actuator which maintains a shut off valve in a fluid conduit in an open position. The high air pressure flows through an air switch which is operationally open and coupled to the seismic air circuit such that when the seismic valve is closed a pilot air pressure is prevented from flowing to the air switch. In the absence of the pilot air pressure, air pressure is bled from the air switch, causing the air switch to move from an open to a closed position, thus preventing air from flowing to the air actuator.

Abstract: An apparatus which is provided for closing a fluid valve in response to initial movement, as for example caused by a seismic disturbance, which is removably mountable to existing inline valves, such as gas valves. The apparatus includes a trigger which is responsive to seismic movement, particularly at a resonant frequency, to release a pressurized fluid supply which in turn drives a mechanical actuator to actuate the subject valve through the existing valve coupling. The existing valve coupling is typically a valve stem which must be rotated approximately ninety degrees from an open position to a closed position. The pneumatic drive is sufficiently powerful to actuate valves which are noticeably difficult to actuate manually. The force required to actuate the trigger mechanism is independent of the force required to actuate the valve, in accordance with the invention.

Abstract: An hydrostatic drive unit for driving a motor vehicle is provided including a pump, a hydraulic motor, connecting means between said pump and motor, a branch line connected to the connecting means, a shut-off means located in said connecting means, measuring means in said shut-off means for measuring the horizontal forces arising in the direction of the longitudinal axis of the vehicle, said shut-off means acting on the hydrostatic drive unit, said measuring means including a mass capable of being displaced in the direction of the longitudinal axis of the vehicle against a forcible stop, resilient means acting on said mass to position the same normally in a center position capable of movement in two directions on the longitudinal axis of the vehicle and in working connection with the shut-off element whereby during the exertion of force upon the forcible stop, said mass acts directly or indirectly on said shut-off element to control fluid flow in said connecting means.

Abstract: An apparatus which is provided for closing a fluid valve in response to initial movement, as for example caused by a seismic disturbance, which is removably mountable to existing inline valves, such as gas valves. The apparatus includes a trigger which is responsive to seismic movement, particularly at a resonant frequency, to release a pressurized fluid supply which in turn drives a mechanical actuator to actuate the subject valve through the existing valve coupling. The existing valve coupling is typically a valve stem which must be rotated approximately ninety degrees from an open position to a closed position. The pneumatic drive is sufficiently powerful to actuate valves which are noticeably difficult to actuate manually. The force required to actuate the trigger mechanism is independent of the force required to actuate the valve, in accordance with the invention.

Abstract: A vibration responsive mechanism having a weight suspension rod pendulum which falls in response to the vibration of a base body. The mechanism comprises a responsive disc secured to said rod normally and coaxially and support balls which contact with and bear against the periphery of the disc, individual set of radial guide races having a biasing means biasing the supporting balls in a centripetal direction and a circular opening through which the responsive disc can pass in a vertical direction and a guide skirt being flared from the inner periphery of a circular opening. This mechanism can be actuated in response not only to horizontal vibration but also to vertical vibration.

Abstract: A master valve adapted for insertion in a fuel line to be controlled and a fluid-pressure-responsive actuator responsive to fuel line pressure for maintaining the valve in open position against the resistance of a valve-closing spring; and a normally closed earth-movement-responsive auxiliary valve connected to the fuel line and the aforesaid actuator and functioning in response to a predetermined minimum severity earthquake to open the auxiliary valve and equalize the pressure in the actuator to effect closing of the master valve by its closing spring.

Abstract: A control valve of the type comprising a rotatable distributing member having a distributing surface having a plurality of coaxial ribs intersected by radially extending rib portions projecting on the distributing surface and engaging a smooth surface of a stationary valve body to define therewith a plurality of coaxial part-annular channels for selectively interconnecting selected ones of a plurality of passages bored through the valve body and opening in the smooth surface. The distributing member is retained in engagement with the valve body by a corrugated spring washer clamped between the outer face of the distributing member and a cap or hood member fastened to the valve body, and the spring washer is fastened against rotation relative to the cap member, while the outer face of the distributing member has a plurality of recesses for receiving the corrugations of the spring washer to hold the distributing member in any one of several angular positions.

Abstract: A control valve is disclosed which includes first and second valves. An inverted pendulum is operative with the valves such that when the pendulum rotates in one direction the first valve is opened and the second valve is closed, and when the pendulum rotates in the opposite direction the valve operation is exactly opposite. An electromagnetic device may also be operative with the inverted pendulum which device when energized causes the inverted pendulum to rotate in one direction or the other. The inverted pendulum may also be rotatably biased for holding one valve opened and the other valve closed. The control valve may be used in any number of control systems and is especially suited for use as a master control valve in a vehicle braking system.