Abstract: A liquid level controller is shown having a housing with a rear wall. A shaft has a first end which extends through the rear wall to a liquid displacement member located within a liquid containing vessel. A second end of the shaft joins a pair of oppositely extending arms. Each of the oppositely extending arms is rotationally mounted on the housing generally parallel to the rear wall in a bearing. Vertical forces responsive to changes in liquid level act on the displacement member and are transmitted as a force tending to rotate the oppositely extending arms. A lever pivotally mounted to the housing is interconnected with a torque bar which, in turn, connects to the oppositely extending arms of the shaft. A valving assembly is engaged by the lever to provide an output for controlling liquid level within the vessel. The valve assembly includes a pneumatic pilot with a contact point which is engageable by a pin carried on the lever.

Abstract: An automatic drain valve for discharging accumulations of fluids and foreign materials from a fluid handling system. The drain valve (10) comprises a reservoir (14) defining a reservoir volume (15) and a thru-port (28), in fluid communication with the reservoir volume (15), that defines an inlet (30) and terminates in a drainage valve (82) for flowthrough communications with a fluid handling system. An actuating mechanism selectively actuates a valve operator. In the preferred embodiment, a pilot valve (41) is mounted in the reservoir (14) for selectively communicating pressurized air to a valve operator (57), such that the valve operator selectively opens and closes the drainage valve (82) communicating with the outlet (88) of the reservoir (14) for selectively draining the reservoir. The pilot valve (41) includes a sensor tube (42) which defines a valve seat (44) and includes a magnetized valve plug (46) for selectively engaging the valve seat (44), the valve plug (46) having a selected magnetic polarity.

Abstract: A straight trap toilet apparatus mainly comprises a main body with a straight trap, a piston, and a toilet bowl. The water outlet of the main body is connected to a waste pipe, and the top of the main body is mounted below the toilet bowl. The main body has a water valve, wherein one end of the water valve is connected to an inlet tube connected to a water-faucet, and the other end of the water valve is connected to an outlet tube that corresponds to the spurt water hole of the toilet bowl. In normal condition, water flows from the outlet tube into the toilet bowel and the main body. A water tank is in fluid communication with the main body by a linking tube such that the water in the toilet bowel and the water tank are at the same level. The motion of the float ball will control a valve handle to control the water valve for controlling the water intake. The water from the outlet tube may gather together in the main body, the toilet bowel, and is in fluid communication with the water tank by a linking tube.

Abstract: A device, and a container having such a device, is provided for permitting filling the container with a predetermined weight of the fluid. The device and container include a main channel to introduce the fluid into the container at a fill pressure; a detector mechanism to detect a "filled" condition based on fluid weight; and a fluid-weight control mechanism to automatically prevent introducing fluid into the container in excess of the "filled" condition. A spring offsets part of the weight of a pivotally mounted displacer mounted on a pivotally mounted lever having an arm configured to permit closure of a ball valve as the container becomes "filled" and the displacer becomes buoyant. The fluid-weight control device, which is substantially independent of the composition and temperature of the fluid and of inertial effects induced in an attempt to thwart the fluid-weight control safeguard, also prevents introduction of fluid into the container as the container is non-upright.

Abstract: An valve assembly for automatically shutting off the flow of a pressurized liquid to a storage tank includes a cam that is rotated in response to the level of a liquid in the storage tank. A follower moves a poppet valve axially with a housing as a nonlinear function of rate of cam rotation. The poppet valve is moved to a closed position to terminate flow of a liquid to the storage tank whenever the liquid level within the storage tank reaches a predetermined level.

Abstract: An overfill preventing valve (20) is adapted to be operatively interposed in a flow path between a fluid source (21) and a compressed fluid storage cylinder (22) to prevent the cylinder from being overly filled. The improved valve includes an elongated tubular body having a first seat (25), a first space (26), a second space (28), a second seat (29), a third space (30), a third seat (31), a fourth space 37 and an entrance portion (32) communicating with a source. A passageway (33) continuously communicates the first and fourth spaces. The second and fourth spaces communicate with the interior of the cylinder. A float (36) is contained within the body for movement toward and away from the first seat in response to the liquid level in the cylinder. A valve member (38) is mounted on the body for sealed movement toward and away from the second seat. This valve member separates the first space from the second space. The valve member is biased to move away from the second seat.

Abstract: An above-ground tank auto-limiter is provided for preventing the overflow of fluid in storage tanks. The auto-limiter includes a valve assembly insertible downward through the top of a fill pipe of the fuel storage tank. The valve assembly has a cylindrical valve housing providing a fluid flow passage directing fuel downward into the storage tank under pressure. A hollow cylindrical float is provided in the valve assembly and is coaxially mounted along the outside surface of the valve housing leading into the storage tank. The float moves vertically to slide freely along the lower portion of the valve housing with the fluctuation of the fuel level within the tank. A series of linkage assemblies communicate the cylindrical float to valve doors. The valve doors prevent any fluid flow from passing through the fluid flow passageway when the doors are in the closed position.

Abstract: An improved overfill shut-off system for a liquid storage tank includes a passage having an inlet end and an outlet end, a valve seat in the passage, a plunger that is movable within the passage for the purpose of engaging the valve seat to impede flow of liquid in the passage, and a guide member for guiding movement of the plunger. The plunger and the guide member are sealed with respect to each other and together define a control space. A first port is defined in the plunger for communicating the control space with an upstream end of the passage, and a second port is defined in the guide member for communicating the control space with a downstream end of the passage. A valve is provided for selectively impeding fluid flow through the second port in response to the level of a float member within the storage tank. When liquid level in the storage tank reaches a predetermined maximum, liquid flowing through the passage will be permitted through the first port, but not through the second port.

Abstract: A device, and a container having such a device, is provided for permitting filling the container with a predetermined weight of the fluid. The device and container include a main channel to introduce the fluid into the container at a fill pressure; a detector mechanism to detect a "filled" condition based on fluid weight; and an fluid-weight control mechanism to automatically prevent introducing fluid into the container in excess of the "filled" condition. A compression spring offsets part of the weight of a displacer such that the displacer becomes buoyant as the container becomes "filled". The displacer has a seat mechanism that sealingly engages an orifice mechanism creating a differential pressure, substantially less than the fill pressure, across a control device causing closure of the main channel.

Abstract: This invention relates to an automatic shut-off valve arrangement for use in fluid transfer systems. In particular, the valve arrangement or assembly may be mounted in a fluid tank or other type of fluid containment zone to automatically shut off flow from a source, when the desired volume of fill is reached. The assembly is for use in automatic or semi-automatic fluid handling systems which include specialized nozzles and coupling systems which eliminate spillage in the process of connection and disconnection of the nozzle and the tank inlet.

Abstract: An above-ground tank auto-limiter is provided for preventing the overflow of fluid in storage tanks. The auto-limiter includes a valve assembly insertible downward through the top of a fill pipe of the fuel storage tank. The valve assembly has a cylindrical valve housing providing a fluid flow passage directing fuel downward into the storage tank under pressure. A hollow cylindrical float is provided in the valve assembly and is coaxially mounted along the outside surface of the valve housing leading into the storage tank. The float moves vertically to slide freely along the lower portion of the valve housing with the fluctuation of the fuel level within the tank. A series of linkage assemblies communicate the cylindrical float to valve doors. The valve doors prevent any fluid flow from passing through the fluid flow passageway when the doors are in the closed position.

Abstract: The present invention relates to a controllable constant flow regulating lift valve of a direct-acting automat ic control type that operates on an operating force derived from the condition of a working fluid, such as valve-inlet pressure prevailing in the inlet passage, valve-outlet pressure prevailing in the outlet passage, variation of liquid level on the side of the outlet and so on. The flow regulating valve comprises a flow regulating valve structure and a slide valve structure for automatic flow restriction control. In the controllable constant flow regulating lift valve, axial thrust acting on the spindle of a lift valve type flow regulating valve structure is balanced such that the constant flow regulating lift valve can be operated for constant flow regulation by a very small power.

Abstract: A system for dispensing liquid from first and second containers is disclosed herein. The liquid dispensing system includes a first media transfer line, positioned in liquid-flow communication with the first container, for transferring liquid from the first container. A second media transfer line, positioned in liquid-flow communication with the second container, is disposed to transfer liquid from the second container. When placed in a first state a switchable valve prevents liquid from flowing through the first media transfer line and allows liquid to flow through the second media transfer line. In a second state the switchable valve prevents liquid from flowing through the second media transfer line while allowing liquid to flow through the first media transfer line. A liquid storage reservoir connected in liquid-flow communication with the switchable valve stores liquid received from the first and second media transfer lines by way of the switchable valve.

Abstract: The valve (30) comprises at least two lateral openings (34, 36) which can be shut off by a plug (40) provided with an axial orifice (48) for the passage of gas, which plug slides axially in the casing (32) between a position in which the openings (34, 36) are shut off under the influence of a spring (44) and an open position counter to the action of the spring (44) under the influence of the pressure of the filling gas, and a level valve (52) activated by a float (62) at the bottom of the casing (32).In order to prevent pressure from building up inside the casing (32) after closure, the latter is provided with escape orifices (50) which are associated with resilient opening means (64).

Abstract: The valve (31) comprises at least two lateral openings (34, 36) which can be shut off by a plug (40) provided with an axial orifice (48) for the passage of gas and sliding axially in the casing (32) between a position in which the openings, (34, 36) are shut off under the influence of a spring (44) and an open position counter to the action of the spring (44) under the influence of the pressure of the filling gas, and a level valve (52) activated by a float (62) at the bottom of the casing (32).The plug (40) comprises an inner cavity (70), the bottom of which has a cross-section in the shape of an open "V". In this cavity (70) is a ball (72) which prevents the cylinder from being filled when the latter is inclined sufficiently for the ball not to be situated at the bottom of the cavity (70).

Abstract: An automatic float-activated drain valve for a liquid reservoir used in the accumulation of condensable materials and other contaminants from pneumatic systems and the like. The float is connected by a flexible tether to a lever arm which opens a pilot valve when the reservoir fills with water and the float moves to the top of the reservoir. The pilot valve permits air pressure to flow to an actuator which opens the drain valve.

Abstract: A system for dispensing liquid from first and second containers is disclosed herein. The liquid dispensing system includes a first media transfer line, positioned in liquid-flow communication with the first container, for transferring liquid from the first container. A second media transfer line, positioned in liquid-flow communication with the second container, is disposed to transfer liquid from the second container. When placed in a first state a switchable valve prevents liquid from flowing through the first media transfer line and allows liquid to flow through the second media transfer line. In a second state the switchable valve prevents liquid from flowing through the second media transfer line while allowing liquid to flow through the first media transfer line. A liquid storage reservoir connected in liquid-flow communication with the switchable valve stores liquid received from the first and second media transfer lines by way of the switchable valve.

Abstract: Liquid level control apparatus consisting of a valve frame with supply gas throughput through an adjustable orifice post and a float actuated release of orifice post pressure to cause a sharp change in pressure to actuate a pressure-responsive dump valve. Proposed then is the further interconnection of the valve frame in reversed disposition to a snap action pilot valve thereby to provide a non-bleeding mode of valve control.

Abstract: A float controlled valve has a float chamber for accumulating a fluid, a pivoting float arm having a float mounted on one end thereof for fluid level determined movement within the chamber, a pivotally mounted actuator arm coupled to the float arm by a magnet driver and having a first magnet mounted at one end of the actuator arm; a pivotally mounted control arm having a second magnet attached thereto, in magnet coupling relationship with the first magnet, and valve means coupled to the pivotally mounted control arm for controlling fluid flow from the chamber in response to movement of the float.

Abstract: A fluid level controller flexibly set up according to the number of level steps to be controlled and the pitch between such level steps, which comprises a plurality of joint pipes connected in series to form a pipe assembly; a ring-shaped magnetic floating member sleeved on such a pipe assembly to follow fluid level to move up and down; a plurality of reed elements having each a reed switch connected in series with one another and received in the joint pipes; a main control circuit comprising latching relays in quantity one less than the quantity of the reed elements and a plurality of controlled actuators respectively connected to the reed elements.

Abstract: An automatic drain valve for discharging accumulations of condensables and foreign materials from a pneumatic system. The drain valve (10) comprises a reservoir (14) defining an inlet (30) and an outlet (86) for flowthrough communications with a pneumatic system. A pilot valve (41) is mounted in the reservoir (14) for selectively communicating pressurized air to a valve operator (57), such that the valve operator selectively opens and closes a drainage valve (82) communicating with the outlet (88) of the reservoir (14) for selective draining the reservoir. The pilot valve (41) includes a sensor tube (42) which defines a valve seat (44) and includes a magnetized valve plug (46) for selectively engaging the valve seat (44), the valve plug (46) having a selected magnetic polarity.

Abstract: An add-on liquid overflow shut-off valve including a valve body, a float and an arm connecting the float to the body that is insertable in fully assembled form through a standard tank lid opening, and further including a flanged end on the valve body for engagement outside and above the rim of the opening and threads associated therewith to engage the periphery of the opening to anchor the body inside the interior of the tank and at the top thereof, pneumatic openings formed in the top flanged end in spaced-apart relation for connection respectively to a pressurized pneumatic source and a pneumatic-driven liquid pump arranged to pump liquid into the tank through another opening in the tank, first and second pneumatic passageways formed interior the body extending from the openings, a third pneumatic passageway formed in the body for interconnecting the first and second passageways, and a shaft pivotally received in the body, having a fourth pneumatic passageway formed therethrough for pneumatic alignment with

Abstract: An automatic drain valve for discharging accumulations of condensables and foreign materials from a pneumatic system. The drain valve (10) comprises as reservoir (14) defining an inlet (30) and an outlet (86) for flow-through communications with a pneumatic system. A pilot valve (41) is mounted in the reservoir (14) for selectively communicating pressurized air to a valve operator (57), such that the valve operator selectively opens and closes a drainage valve (82) communicating with the outlet (88) of the reservoir (14) for selective draining the reservoir. The pilot valve (41) includes a sensor tube (42) which defines a valve seat (44) and includes a magnetized valve plug (46) for selectively engaging the valve seat (44), the valve plug (46) having a selected magnetic polarity.

Abstract: The irrigation regulator, 1 and 2, releases water at appropriate intervals of time, which are controlled by the water evaporation rates in an evaporation pan (19). A water level sensor and valve system (7), (14), (9), (15) and (13), release irrigation water from the time the water level in the evaporation pan drops at a certain low level (2), due to evaporation, until is restored to the original high level (1), with the supply of water to the evaporation pan, during irrigation.In cases when from a water source a number of sectors of an irrigation network have to be supplied with water available at rates which can satisfy one sector at a time, regulators of a number equal to the number of sectors, with double outlet water valves (8), may be interconnected as shown in the FIGS. 3, 4, and 5, so that when the one regulator delivers water for irrigation, the others do not.

Abstract: An apparatus for directing a liquid fertilizer into an irrigation system having a liquid fertilizer flow conduit with the valve of a solenoid valve and the float of a float switch located in series and an electric circuit with the switch of the float switch, solenoid of the solenoid valve and automatic timer device in series. The apparatus directs fertilizer therethrough when electricity is delivered to the switch, solenoid, and automatic timer device when the switch is closed by the float and the timer is conducting electricity.

Abstract: The present invention discloses an apparatus for monitoring the level of a liquid such as water in a reservoir of a water cooling tower or the like wherein it is required to maintain a predetermined desired liquid level and for generating a first control signal for controlling the addition of make-up liquid to the reservoir and a second control signal for terminating the addition of liquid to the reservoir. The apparatus includes a float chamber having it bottom coupled to the reservoir for equalizing the water levels therebetween. A float is positioned within the float chamber for rising and falling with the level of monitored liquid therein. A float rod extends vertically upward from a central portion the float for movement therewith. A lever housing is fixedly secured in an intermediate position within the float chamber, and the lever housing pivotally mounts a lever member therein. The lever member has a long lever arm and a short lever arm.

Abstract: A liquid level control float valve comprising a valve body having an inlet, a cap having an outlet, a drain pipe having a drain aperture, a piston member having a fluid aperture disposed in an upper plate and a disc valve disposed in the lower portion thereof, and a float ball connected to the outlet through an open/close valve, whereby upon the change in the level of the liquid, the float ball is raised and or lowered which in turn moves the piston member which further opens or closes in a corresponding manner the outlet and the drain aperture.

Abstract: A control valve which includes a main body, a stop valve, a spring-loaded control rod, a support rod and a corresponding shaft, a lid with a fixing element on it, a guide rod and a float cylinder. The float cylinder is restrained only to mover vertically on the guide rod. The stop valve moves vertically in a valve chamber on the upper end of the main body under the influence of water pressure. As water is flushed from the reservoir, the float descends along with the water level and causes the control rod to allow water flow from the upper part of the valve chamber, so that water can flow into the reservoir.

Abstract: An automatic drain valve for discharging accumulations of condensables and foreign materials from a pneumatic system. The drain valve (10) comprises a reservoir (14) defining an inlet (30) and an outlet (86) for flow-through communications with a pneumatic system. A pilot valve (41) is mounted in the reservoir (14) for selectively communicating pressurized air to a valve operator housed in the base portion (18) of the reservoir (14), such that the valve operator selectively opens and closes a drainage valve (82) communicating with the outlet (88) of the reservoir (14) for selective draining the reservoir. The pilot valve (41) includes a sensor tube (42) which defines a valve seat (44) and includes a magnetized valve plug (46) for selectively engaging the valve seat (44), the valve plug (46) having a selected magnetic polarity.

Abstract: A scavenger system (10) for a hydraulic recirculating installation, such as may be employed with a vehicular transmission (11), which employs a sump (18) to collect the recirculating hydraulic fluid (19). The sump (18) is to be maintained essentially dry, and as a result the requisite volume of hydraulic fluid (19) for the recirculating installation is stored within an independent reservoir (28). The sump (18) is provided with one or more collecting wells (21), and a unique pickup head assembly (22) is received within each well (21). The pickup head assembly incorporates a pilot valve (60) that interacts with an inlet valve (55). The inlet valve (55) effects communication between the well 21 and a conduit means (29). The conduit means (29) communicates with the inlet port (30) of a circulating pump (25) from a fluid reservoir (28) as well as from the pickup head assembly (22). A float (99) senses the level of the fluid (19) within the well (21) and effects a corresponding reaction to the spool valve (60).

Abstract: A two function tank valve according to this invention includes a vertically oriented supply tube or conduit with an upper opening. A valve seat surrounds the opening, and a valve seal is movable against it and away from it. Water level responsive means determines this valve setting so the valve can be opened to fill the tank, and can be closed when the tank is full.

Abstract: An improved liquid level controller having a housing, a body connecting from the rear of the housing for connecting directly to a vessel and to allow transmission of forces exerted by the displacer type float within the vessel responsive to changes in the level of liquid therein through the housing to a shaft having rotation about an axis extending horizontally and parallel to the rear of the housing, a torque bar pivotally mounted near its center to the body, means for imparting the rotational force of said shaft as an upward force to one side of the torque bar, means biasing the torque bar in a direction to maintain it in contact with and balance the force from said force imparting means, a control means having a supply and an output for actuating a liquid control, a proportional band mechanism including a lever pivotally mounted to said housing at one end and having a fulcrum member slidably mounted thereon for engaging said torque bar to transmit the slight motion of said torque bar in balancing the force

Abstract: A system for dispensing liquid chemicals, such as photoresist, from containers which includes a valve to govern the flow from the containers, a reservoir to intermediately hold the chemicals prior to pumping, and a level detector to monitor the liquid in the reservoir and to control the valve, and an aspirator to remove air from the reservoir. The aspirator is activated in response to signals from the level detector indicating that the reservoir level is low. The increased suction causes liquid to be drawn from the container into the reservoir. If after a period of time the level detector indicates the reservoir level is still low, the valve will cause liquid to be drawn from a different container. The aspirator is deactivated a period of time after the level detector indicates that the reservoir level is normal.

Abstract: A differential pressure-actuated valve with a piston slidable to open or to close an inlet port. The piston slides in a cylindrical wall, and separates a bias chamber and a flow chamber. The piston is fitted with two oppositely-directed lip seals, one of which seals against bias chamber pressure, and the other of which scrapes particulate matter off of the wall. Optionally, an elongated filter extends from the piston into an inlet pipe where it filters water which flows to the bias chamber. The filter may have a perforated mesh wall, or a solid wall with an open end.

Abstract: An automatic drain valve system for collecting and draining a liquid and/or contaminants within a reservoir (45A) including a level sensing float (68A). The liquid or contaminants are introduced into the reservoir through an inlet (48A) and exit the reservoir (45A) through an outlet (206). A control valve which is responsive to the liquid level contained within the reservoir (45A) includes coupled magnetic members which selectively open and close the control valve in response to the liquid within the reservoir (45A) reaching preselected levels. This control valve activates the drain valve (34A) for opening and closing the drain outlet such that the system is automatically drained upon when the liquid within the reservoir reaches a preselected level.

Abstract: An automatic drain valve system for collecting and draining a liquid and/or contaminants within a reservoir (148) including a level sensing float (68'). The liquid or contaminants are introduced into the reservoir through an inlet (48) and exit the reservoir (148) through an outlet (176). A control valve which is responsive to the liquid level contained within the reservoir (148) includes coupled magnetic members which selectively open and close the control valve in response to the liquid within the reservoir (148) reaching preselected levels. This control valve activates the drain valve (34') for opening and closing the drain outlet such that the system is automatically drained upon when the liquid within the reservoir reaches a preselected level.

Abstract: A pneumatic liquid level control apparatus and method providing both a snap-actor mode and a throttling mode by rotating a control means on the apparatus. The control means has a reciprocating valve means mounted inside which is operative in the snap-actor mode and which is inoperative when the control means is rotated to the throttling mode. The control means is mounted on the apparatus housing so that it can be moved between its snap-actor mode and its throttling mode by merely loosing screws for affecting the movement and then tightening the screws to begin operation.

Abstract: A system for maintaining a predetermined average liquid level in a pool comprises a pilot valve responsive to a float in the pool and a main valve controlled by the pilot valve to unblock a normally blocked supply conduit when the liquid in the pool drops below that level. The pilot valve, when opened by the float, lets incoming liquid under pressure--branched off the supply conduit at a point upstream of the main valve--enter a compartment under a membrane in the body of the main valve, that membrane carrying a control rod connected with a movable plate which coacts with a stationary plate obstructing the supply conduit inside the valve body; the two plates have apertures which are normally offset from each other but register upon pressurization of the membrane to give passage to the incoming liquid.

Abstract: A valve comprises a hollow valve seat member having a plurality of openings formed therein and a hollow valve member adapted to be moved under an increased water pressure in a pressure chamber to close the openings in the seat member when water reaches its predetermined level. A manually operating valve member is provided to relieve the water pressure in the pressure chamber, thereby allowing movement of the hollow valve member away from the valve seat member.

Abstract: An improved float actuated pilot valve is shown for use in an oil and gas separator. The pilot valve has a valve body with a gas inlet, a lower chamber communicating with the gas inlet, an upper chamber, a gas outlet, and a gas passage connecting the upper chamber, lower chamber, and gas outlet. An actuator piston is contained within the upper chamber and has a top stem contactable by the flapper arm of a displaceable float located within the separator. The actuator piston also has a bottom stem which is slidably received within a portion of the valve gas passage. A control piston is contained within the lower chamber and has an upper stem in contact with the actuator bottom stem and has a lower stem. The control piston has an upper sealing face which sealingly engages the opening of the gas passage into the lower chamber. A coil spring normally biases the control valve sealing face toward a closed position in contact with the gas passage opening to block the flow of gas from the gas outlet.

Abstract: A float controlled valve comprises a chamber with aligned openings, a detachable cap carrying a sealing washer on one opening and a tube arranged to move under the action of the float in the second opening with a seal ring sealing it. The sealing ring is located in position by means of a detachable holding element accessible when the cap is off. Thus the sealing washer and the sealing ring may be replaced after the removal of the cap.

Abstract: An automatic drain system is provided for reservoirs used to accumulate water, condensables, and other foreign materials which may be present in pneumatic systems and the like. This drain system is associated with a reservoir wherein these contaminants are accumulated and is operated by a float within this reservoir. The principal operating items of the drain system are a pair of magnetically coupled magnets, one positioned within the float and the other within a valve plug of a pilot valve. These magnets normally have opposite polarities whereby the float, in its lowest position and as it rises within the reservoir, causes the valve plug to be maintained against the pilot valve seat. A separate pneumatic system attached to this pilot valve maintains a drain valve operator in a condition such that the drain valve from the reservoir is closed while the pilot valve components are in contact.

Abstract: A liquid level control utilizing magnetic repulsion for raising and lowering a lever for venting or closing a gas pressure supply path to move a valve assembly, in the gas pressure supply path, in a relay-type snap action for opening or closing a valve controlling the liquid input and output of a vessel in response to the rise and fall of a float assembly with the liquid level.

Abstract: A valve assembly is adapted to control the water level within a toilet flush tank, by gravitational bodily movement of a hush tube and a valve housing integral therewith, responsive to emptying of the tank. A float coaxial with and secured fixedly to the hush tube is weighted in a manner to cause the gravitational motion of the hush tube and valve housing, when the float loses buoyancy as a consequence of the emptying of the flush tank contents. The gravitational movement of the float, hush tube, and valve housing in respect to an upstanding fill tube upon which these elements of the assembly are mounted for up and down sliding motion, causes actuation of a pilot reed valve. The pilot valve acts to break a valve seal between the fill tube and the valve housing, to an extent such that a very small force used in the opening of the pilot valve is sufficient to allow the normal line pressure to assert itself for full unseating of the valve and a consequent normal refilling of the flush tank.

Abstract: A liquefied gas overcharge prevention device provided with a safety valve. The overcharge prevention system comprises, in combination, a conventional pressurized gas tank charging valve having a liquid level responsive gas inlet valve mechanism, a first relief valve for regulating pressure within the tank and a second relief valve for regulating back pressure within the charging valve.

Abstract: A valve, of compact design, permits the opening and blocking of a liquid flow whose level is directly proportional to the operation of the valve, with the use of conventional floats being completely abandoned, and with the hydraulic mechanism of said valve being activated in different manners, according to the origin of the source of flow, which can be produced either through the upper part of the tank or from the bottom. There are three embodiments of the valve.

Abstract: The invention relates to control apparatus for feeding liquified refrigerant to the evaporator of a refrigeration system. A main valve controlled by a differential pressure type servo-element controls the flow of refrigerant to the evaporator. A float type pilot valve has a nozzle and closure member controlled by a float which has a liquid level identical to liquid level in the evaporator. A pilot conduit which extends between the main valve and the pilot valve has first and second throttle units arranged in series. The first throttle unit controls a flow of liquid refrigerant through the pilot conduit to control the main valve. The second throttle unit controls a flow of refrigerant through the pilot conduit which is at least partially in vapor form. This arrangement with two throttle units allows control over a broader proportional range for the settings of the float in the pilot valve.

Abstract: A water-spraying device for cleaning ship's hull and other upright surfaces has a horizontally movable carriage from which an outrigger extends towards the surface to be cleaned, and carries a water-spraying device. The carriage has a longitudinally extending water reservoir and a water supply conduit extends along its path of movement and has valves which are opening by a device in the carriage when the water in the reservoir drops below a predetermined level.

Abstract: A self-restricting shutoff valve for use with a fluid leak detector to prnt excessive loss of fluid in event of a high flow-rate leak. A valve spool within a valve body is spring-biased to a partial flow position and is maintained in an opened position by fluid pressure. Upon loss of fluid system pressure, springs move the valve spool to a position to restrict fluid flow through the valve body. When sufficient loss of fluid occurs, a fluid leak detector actuates a pilot valve so that system fluid moves the valve spool to a closed position.

Abstract: For use in a toilet flush tank having a flush discharge opening at the bottom which is normally closed by a discharge valve having an air chamber therein, an attachment including an air passage for venting the air chamber and a water level responsive valve normally closing the air passage when the water within the tank is above a predetermined height and for venting the air chamber when the water in the tank falls to a predetermined level, so that when the discharge valve is lifted and buoyed by the air within the chamber thereof during the discharge of water from the tank, the discharge valve will be permitted to reseat as soon as the float controlled valve vents the air chamber.