Abstract: A coaxial valve includes a valve box having an inlet opening, an outlet opening, and a common flow channel. An axially movable cylindrical valve casing has an opening for a fluid inlet port and an opening for a fluid outlet port, both of which are joined up in the flow channel. A coaxially positioned shutoff mechanism located inside the valve box closes off the inlet port or the outlet port of the valve casing. To provide for axial movement, the valve casing has at least one external circular groove. The drive casing has at least one inner circular groove, which is adapted to the outer circular groove so that the inner and outer grooves are engaged, via inside ball bearings, to create a ball planetary gear and ball rotary spindle drive. The drive casing is turnable and forced to turn by a drive motor inside of the valve box.

Abstract: An HVAC controller housing including a plurality of valves extending therein for directing airflow to a plurality of ducts is provided. The housing is of the type including a side port extending outwardly from the housing and in fluid communication with one of the ducts. A drive gear is provided on the housing to drive a plurality of driven gears disposed on the housing for driving the plurality of valves. The driven gears are responsive to the drive gear through a transmission member comprising an annular idling gear in meshing engagement with the drive gears and at least one of the driven gears. The annular idling gear is rotatably supported on the housing and encircles the side port for efficient torque transfer between the drive gear and the driven gears.

Abstract: A highly efficient apparatus for actuating a valve. An input mechanism drives the apparatus through an input member. Torque is increased as a plurality of driver discs eccentrically rotate about a central shaft member and engage an output member via low-friction, roller means. The output member engages a valve stem which opens or closes the valve.

Abstract: A mixing valve has a housing having hot- and cold-water inlets and at least one hot-, cold-, or mixed-water outlet. Respective hot- and cold-water valves in the housing each have a valve stem rotatable to control flow through the respective valve and carrying a respective externally toothed gear. Respective hot- and cold-water control rings rotatably mounted about a common axis on the housing each have internal teeth in continuous mesh in all angular positions of the valves and rings with the gears of the respective valves.

Abstract: An actuator for a valve serving to transfer turning power from a motor to an output shaft through an inner gearing planet gear speed reducing mechanism that is imposed in a casing and adapted to effect speed reduction of the turning power, and utilize rotation of the output shaft to open and close a valve by rotation. The gear speed reduction mechanism includes an eccentric body rotated in consequence of transfer of the turning power from the motor, an outer gear disposed so as to generate a vibrating rotation through the eccentric body, an inner gear meshed in an inscribing manner with the outer gear, a rotation transferring mechanism for extracting rotation from the vibrating rotation of the outer gear and transferring the extracted rotation to the output shaft, and an output shaft connected through the rotation transferring mechanism.

Abstract: This invention relates to a shutter device for the precision control of a flow, comprising at least one organ for shutting a section for the passage of a flow, the motion of which is proportional to that of an actuator controlling it, wherein said device comprises at least two shutter organs controlled by the actuator by means of a transmission allowing to obtain slightly different proportionality coefficients for the motion of said organs.

Abstract: A water supply system for supplying water to a building including a water tank (13) for collecting water from the roof (10) and gutters (12) of the building (11); a water level sensor means (21) for sensing the level of water in the water tank; a tank water system (22) for supplying water from the water tank (13); a water pump (23) for pumping water from the water tank (13) along the tank water system (22); a non-return valve (25) downstream of the pump in the tank water system; a pressure sensor means (26) for sensing water pressure of water within the tank water system, said pressure sensor means (26) is located downstream of the non-return valve (25); a mains water system for supplying mains water; a three port valve (35) having a first port (34) connected to the tank water system downstream from the pressure sensor means (26), a second port (37) connected to the mains water system and a third port (41) connected to the building's water reticulation system; wherein when the first (34) and third port (41) a

Abstract: An easy-to-assemble motor-adjustable throttle valve for fluid channels, especially in motor vehicle air conditioning systems, which can be obtained when a geared motor is integrated in the setting stem without causing an unacceptable reduction of the remaining clear channel cross-section. A built-in housing fitted with a high-speed small servomotor and provided with a strongly reducing shaft gear disposed inn the axial extension of the housing is radially inserted through a side wall of the channel and coaxially inserted into a pot-shaped tapered section of one end of the setting stem, the output wheel of the shaft gear being formed on the inner covering surface of such section.

Abstract: A valve assembly includes a valve stem which is connected with a valve. A drive member is disposed in engagement with the valve stem. A gear assembly is operable to rotate the drive member to effect axial movement of the valve stem. The gear assembly is driven by an electrical motor. In the event of a power failure, the valve may be moved to a closed condition by either a return spring or an auxiliary source of electrical energy. To facilitate movement of the valve between the open and closed conditions, the valve is pressure balanced.

Abstract: A damper utilizing a frame having a base and a wall portion extending outwardly from the same. The wall portion supports a stepped edge which is positioned to at least partially circumvent and aperture formed by the frame. A plurality of flanges are positioned in overlying relationship and slidably move relative to one another by a mechanical mechanism. A plurality of flanges ride on a stepped edge portion to cause fanning of the flanges across the aperture to selectively occlude the aperture or a portion thereof.

Abstract: A liquid distributor valve. This valve comprises a compartmented base body being provided with a top cover and having several outlets and an upperly arranged, lateral inlet, a rotatable obturator bell being arranged between the outlets and said inlet and having an upperly arranged shaft projecting through said cover, the shaft being governed by an electronic, externally arranged control. This valve is characterized in that the electronic, externally arranged control forms an independent assembly being apt to be removably fitted onto the base body, the obturator bell shaft comprising a cap being apt to allow to removably couple it, the a cap also being apt to penetrate into the assembly forming the electronic, externally arranged control and to be coupled to the shaft of the gearmotor pertaining to the electronic, externally arranged control.

Abstract: A microvalve for controlling fluid flow, including a body portion having at least one opening formed therein, a shutter located adjacent to and substantially parallel with the body portion, and a drive mechanism for causing the shutter to pivot with respect to the body portion so that the shutter is brought into and out of alignment with the opening of the body portion, wherein the microvalve is in a closed position and an open position, respectively.

Abstract: A series of electric valve drive units is provided, which can set up rotational efficiency and anti-counter-rotating function of a valve. In a series of electric valve drive units which can drive a valve body via reduction gears, at least one gear mechanism of the reduction gears is provided with an eccentric wobbling inscribed gear type of a planetary gear mechanism which has an input shaft, an external gear eccentrically and wobbly rotating about the input shaft, an internal gear engaged with the external gear, and a carrier absorbing a wobbling ingredient of the external gear. At least two types of valve drive units are supplied, one of which places prime importance on the anti-counter-rotating function, and the other places prime importance on the rotational efficiency.

Abstract: An air motor (34) is arranged at a right angle to the valve stem (54), through a right angle gear drive (36) that provides torque amplification. A bracket (40) associates the motor with the valve body (48), having a flat ring (68) that fits over the valve body and has clearance notches (94) providing circumferential indexing. Semi-circular locking plates (66) are axially adjacent the ring and pivoted for swinging between a locking position where they fit in a groove (59) in the valve body and an unlocking position where they are free of the groove. Each locking plate has several through-holes through any of which a locking pin (42) can pass to lock the locking plate in locking position. Each locking pin protrudes axially beyond the ring to present interference with the valve body preventing the bracket from turning when the motor operates.

Abstract: An electromotive servo drive includes a drive motor having an external rotor and a drive train in driving relationship with the drive motor and having an output member operatively connected to a control element to be adjusted. A locking device having a brake element is movable between a release position in which the rotor is free to rotate and an operative position in which the rotor is locked in place. Operatively connected to the brake element is a reset spring for maintaining the rotor at a standstill, when the reset spring is under tension, wherein the reset spring tensioned by turning an actuating shaft by hand.

Abstract: An air conditioning system for a vehicle includes a first air path formed within an air duct, and a second air path formed within the air duct. The air conditioning system also includes an air mixing damper for adjusting a first amount of air, which flows within the first air path, and a second amount of air, which flows within the second air path. The air mixing damper includes a plurality of convex portions, and a plurality of concave portions, each of which concave portions is positioned between adjacent pairs of the plurality of convex portions. The air conditioning system also includes a drive mechanism for driving the air mixing damper. The drive mechanism includes a first gear engaging a portion of the plurality of convex portions and a portion of the plurality of concave portions. The drive mechanism also includes a shaft coupled operationally to the first gear, and an end of the shaft is positioned outside the air duct.

Abstract: A microvalve for controlling fluid flow, including a body portion having at least one opening formed therein, a shutter located adjacent to and substantially parallel with the body portion, and a drive mechanism for causing the shutter to pivot with respect to the body portion so that the shutter is brought into and out of alignment with the opening of the body portion, wherein the microvalve is in a closed position and an open position, respectively.

Abstract: A damper utilizing a frame having a base and a wall portion extending outwardly from the same. The wall portion supports a stepped edge which is positioned to at least partially circumvent and aperture formed by the frame. A plurality of flanges are positioned in overlying relationship and slidably move relative to one another by a mechanical mechanism. A plurality of flanges ride on a stepped edge portion to cause fanning of the flanges across the aperture to selectively occlude the aperture or a portion thereof.

Abstract: A valve driving device comprises an electric multi-way valve which simultaneously drives a plurality of valve bodies.

Abstract: A stop apparatus for a gear actuator includes a traveling stop nut that has adjustable positions and travels on a screw on an input shaft. The stop nut is mounted to threadably travel on the stop screw. A stop guide is attached to the stop screw and prevents rotation of the stop screw relative to the gear actuator and permits longitudinal travel of the stop screw during rotation of the input shaft. The stop nut abuts a stop surface upon a predermined amount of rotation of the input shaft to prevent further rotations.

Abstract: A motor-operated damper device includes a baffle driving device equipped with a motor, a baffle that is driven by the baffle driving device, a frame defining an opening section that is closed and opened by the baffle, the opening section having a peripheral edge section, and a buffer member that is attached to the baffle and that resiliently deforms and contacts the peripheral edge section of the opening section when the opening section is closed by the baffle. A detent torque of the motor is used to maintain a stopping state in which the buffer member is resiliently deformed to provide a close contact with the peripheral edge section of the opening section. The motor-operated damper device includes a stopper that allows an appropriate amount of elastic deformation of the buffer member and yet prevents the peripheral edge section of the opening section from excessively sinking into the buffer member.

Abstract: A series of electric valve drive units is provided, which can set up rotational efficiency and anti-counter-rotating function of a valve body in accordance with a use application, with realizing miniaturization and reduction in space of the unit. In a series of electric valve drive units which can drive a valve body via reduction gears, at least one gear mechanism of the reduction gears is provided with an eccentric wobbling inscribed gear type of a planetary gear mechanism which has an input shaft, an external gear eccentrically and wobbly rotating about the input shaft, an internal gear engaged with the external gear, and a carrier absorbing a wobbling ingredient of the external gear, wherein one of the internal gear and the carrier is secured, and the other is coupled to a valve body side. Eccentric wobbling rotational resistance of the external gear is different from each drive unit.

Abstract: A torque booster for operating a valve during initial opening and closing movements of the valve. The torque booster includes a rotatable valve operating stem, a rotatable operator shaft, a gear reduction unit, and a coupling for temporarily operatively interposing the gear reduction unit between the shaft and the stem during initial rotation of the shaft in a valve-opening or a valve-closing direction, so that during the temporary period the stem rotates at a fraction of the speed of the shaft. After the temporary torque-boost period, the speed of rotation of the stem increases with respect to the speed of rotation of the shaft, preferably so that the speeds of rotation of the stem and shaft approach or equal a ratio of one-to-one.

Abstract: A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The fluid pump also provides fluid outflow when the rotational direction of the input drive is reversed.

Abstract: The present invention discloses a motorized drive unit for operating a valve including a gear, a motor, a chain coupling the gear and motor, a housing encasing the motor, gear, and chain, and a rotation limiting piece. Additionally, the present invention discloses a method for mounting a gear to a gate valve handle by providing a gear and a mounting plate, positioning the mounting plate beneath the handle of the gate valve, positioning the gear above the handle of the gate valve, and coupling the mounting plate to the gear. Further, the present invention discloses a method for mounting a gear to a ball valve by providing a gear having a cutout portion, removing the handle from the ball valve stem, placing the second portion of the handle through the cutout portion of the gear, and coupling the handle and the gear to the stem.

Abstract: A globe valve system for controlling the flow of fluid in a pipe comprises a pipe receiving body having within a fluid passage, a valve seat and a globe valve plug movable between an open position allowing fluid flow through the passage and seat a closed position blocking the fluid flow as actuator have the valve plug between the open and closed positions and a spring assists the valve plug in moving from the open to the closed position.

Abstract: A multiple mode valve assembly including valve actuators equipped with a combination of a shaft (4) and a spindle (5), coaxial and immobilized in an axial direction, but capable of rotating freely one with respect to the other, so that by means of the spindle (5), through a threaded nut assembly (6) and the pertinent motor (9), the longitudinal displacement of the gate (3) is produced in valve opening and shutting operations, whilst by means of direct application of a rotary movement to the shaft (4), which does not affect the spindle (5), from a second motor (23), the gate (3) turns on the valve seat (2), in the shut position, producing a friction effect and consequent self-cleaning of the seal.

Abstract: An apparatus (30) and method for adjusting an actuator (32) on a real-time basis includes a rack (40) extending axially over at least a portion on an outer surface of an adjustable member (36). The actuator (32) has a bore (42) that extends from the rack (40) to the outer surface (44) of the actuator (32) to receive an adjustment member (46). The adjustment member (46) includes a pinion (48) at one end for engaging the rack (40) while the adjustment member (46) is situated out of the functional flow or positioning area. Engagement of the pinion (48) of the adjustment member (46) with the rack (40) on the adjustable member (36) provides a real-time adjustment of the actuator (32) to a desired position or setting which then may be fixed or locked into that position.

Abstract: An electronic throttle apparatus permits aggregating of various parts and rationalization of installation, and can simplify assembling operation and wiring operation to an engine room for rationalization of an installation space. The throttle apparatus for an engine includes a throttle body housing therein a throttle valve and disposed in an air intake of the engine, a throttle actuating motor, a throttle position sensor detecting a throttle valve angle and an air flow sensor located on upstream of the throttle valve and measuring an intake air flow rate. The throttle actuating motor, the throttle position sensor and the air flow sensor are mounted on the throttle body.

Abstract: A throttle valve controller for an internal combustion engine in which a ring gear comprises a center body, a teeth portion, at least one rotation detent portion and at least one contraction detent portion for preventing the ring gear from rotation along the peripheral direction of the ring gear, wherein the rotation detent portion and the contraction detent portion are arranged with equal spacing along the peripheral direction of the ring gear. As a result, accuracy of the circularity of the ring gear is improved.

Abstract: A gas valve assembly for forming a plurality of valves is provided which includes a unitary valve body having a gas supply passage interconnected to a plurality of flow control chambers wherein the gas supply passage is interconnected with a supply of gas. A plurality of valve plugs corresponding in number to the number of flow control chambers are provided wherein each of the valve plugs is rotatably disposed in one of the flow control chambers. A plurality of gear train assemblies operate for rotating the valve plugs within the flow control chambers. A valve cover encloses the plurality of gear trains and mounts to the valve body. A plurality of motors, secured to the valve cover, operate to rotate the valve plugs within the flow control chambers, wherein the plurality of flow control chambers and corresponding valve plugs form a plurality of valves provided in a single valve body.

Abstract: Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke systems. The downhole flow control choke mechanisms each include a downhole electronics package to provide programming or decision making capacity as well as motor actuation systems. Each choke mechanism also includes a system whereby the device can be converted to manual operation and actuated by a conventional shifting tool.

Abstract: A fluid valve assembly includes a housing, a valve, a rotatable driver received in the housing in operative communication with the valve, and an over-center linkage disposed between the driver and the housing. The housing includes an entrance to permit fluid flow into the housing and an exit to allow fluid flow out of the housing. The valve is disposed between the housing entrance and exit. The valve is configured in an open state to permit fluid flow through the housing and in a closed state to block fluid flow through the housing. Rotation of the driver from a first rotational position toward a second rotational position moves the valve from the closed to the open state, and rotation of the driver from the second rotational position to a third rotational position permits the valve to return to a closed state. The over-center linkage biases the driver to either the first or third rotational position.

Abstract: A Hall-effect angular rotation sensor device for a throttle valve unit. The sensor includes a housing unit, a stationary unit, and a moving unit moveable relative to the stationary unit. The stationary and the moving units are at least partially enclosed by the housing unit. The stationary unit includes a first and a second partial ring stator segment that are at least partially retained in the housing unit, leaving a stator distancing gap in which at least one Hall-effect IC switch is positioned. The moving unit includes (a) a partial ring magnet segment that is at least partially distanced from the first and the second partial ring stator segments by an air gap and (b) a third partial ring stator segment positioned behind and opposite the air gap.

Abstract: A Hall-effect angular rotation sensor device for a throttle valve unit. The sensor includes a housing unit, a stationary unit, and a moving unit moveable relative to the stationary unit. The stationary and the moving units are at least partially enclosed by the housing unit. The stationary unit includes a first and a second partial ring stator segment that are at least partially retained in the housing unit, leaving a stator distancing gap in which at least one Hall-effect IC switch is positioned. The moving unit includes (a) a partial ring magnet segment that is at least partially distanced from the first and the second partial ring stator segments by an air gap and (b) a third partial ring stator segment positioned behind and opposite the air gap.

Abstract: In liquid carrying cargo tanks of barges, with valves located inside the tanks at the bottom, valve position indicator assemblies are mounted at the valve operating shaft, above deck and fixed in position relative to the tank above the top of the tank. Each assembly includes a two-piece gear that is clamped onto the valve operating shaft. A mating gear is mounted on a shaft parallel to the valve operating shaft and having a screw thread on it. A nut mounted on the screw thread has an indicator pointer mounted to it and which moves vertically relative to the screw as the shaft is rotated and advances between a lowermost position on an indicator scale indicating valve closed condition, and an uppermost position on an indicator scale indicating valve open condition, as the valve operated shaft is rotated to operate the valve between the closed position and the open position. Various mounting arrangements are used.

Abstract: An arrangement in a circulation lubrication system, the arrangement including a control mechanism for controlling the flow of lubricating oil supplied to a part to be lubricated. The control mechanism includes two interfitting tubes with apertures in walls of both of the tubes. The apertures are arranged to provide a flow orifice for the lubricating oil, and the tubes are arranged to be rotatable around their common symmetry axis to the effect that an angular position of the tubes in relation to one another changes and the apertures in the tube walls shift in a circumferential direction of the tubes by their relation to one another, thereby a change in a size of the flow orifice is provided by the apertures. The rotating movements of the tubes are produced by different transmissions.

Abstract: A valve of a vacuum apparatus with a valve seat body having left and right communicating openings opposed to the two vacuum chambers, respectively, a valve body movable in the axial direction of the valve seat body and rotatable around the center axis thereof, and a driving section for moving the valve body in the axial direction of the valve seat body and for rotating it around the center axis thereof, the valve being so disposed between the left and right vacuum chambers that the driving section of the valve is projected outwardly in the horizontal (lateral) direction.

Abstract: A water conditioner valve includes a main housing configured for providing fluid communication between a plurality of locations, and having first and second valve chambers, a main piston mounted for reciprocal movement in the first valve chamber and having a main piston rod attached thereto, the main piston rod provided with a main cam follower; a supplemental piston mounted for reciprocal movement in the second valve chamber and having a piston rod attached thereto, the supplemental piston rod provided with a supplemental cam follower; the valve also having a cam member having an axis of rotation, a first cam track for receiving the main cam follower, and a second track for receiving the supplemental cam follower, the cam tracks being constructed and arranged on the cam member so that rotation of the cam member will cause movement of the pistons along a linear axis which is parallel to the axis of the cam member for controlling the relative positions of the pistons in the respective chambers to obtain the de

Abstract: A valve actuating device comprising a lower housing seat, a first transmission member, a main shaft, a second transmission member, a fifth transmission member, and an upper housing body; the second transmission member is fastened pivotally at the lower segment thereof with the outer periphery of the ring portion of the first transmission member and is provided on the outer periphery of the midsegment thereof with a worm gear portion engaging a horizontal worm rod, the second transmission member is provided in the inner periphery of the midsegment thereof with a second engagement portion, the third transmission member is fastened pivotally with the main shaft and is provided on the outer periphery of the top segment thereof with a third engagement portion and is further provided at the lower segment thereof with an eccentric shaft portion, the fourth transmission member is fastened pivotally with the eccentric shaft portion and is provided in the outer periphery thereof with a fourth engagement portion which i

Abstract: There is disclosed an actuator for a rotary valve, such as a butterfly valve which rotates a quarter of a turn between open and closed positions. The actuator includes a drive mechanism releasably attachable to the stem of the valve for rotating it in response to operation of a reversible electric motor.

Abstract: A gas inlet member is fixed to a valve body and an upper part stem and a lower part stem are inserted slidably into a vertical stem opening above the gas inlet member. A valve member is provided in the gas inlet member and a gas flow passage is formed. A ring-like seal member is mounted onto the upper part stem and an O-ring is fixed to the lower part stem. A part of the valve member disposed at the lower end portion of the valve body is merely inserted into a gas container. It is possible to carry out a stable operation of the gas supply valve in spite of a change of environment due to vibration or heat while driving a vehicle.

Abstract: There is disclosed an actuator for a rotary valve, such as a butterfly valve which rotates a quarter of a turn between open and closed positions. The actuator includes a drive mechanism releasably attachable to the stem of the valve for rotating it in response to operation of a reversible electric motor.

Abstract: A valve assembly for a tank having an opening. The valve assembly includes a body assembly mounted to the tank opening. The body assembly has a valve seat and a valve throughbore. A valve disk coacts with the valve seat for opening and closing the valve throughbore. A locking lug is attached to the valve disk. The locking lug has a locking portion for receiving a safety lock pin mounted in the body assembly. The safety lock pin has a locked position and an unlocked position. The safety lock pin is received in the locking portion of the locking lug to lock the valve disk in the locked position, and the safety lock pin is withdrawn from the locking portion in the unlocked position. A valve operator is in releasable contact with the valve disk. The valve operator forces the valve disk away from the valve seat to open the valve throughbore. The body assembly includes a first member and a second member and the lock pin is mounted in the first member.

Abstract: An interface for connecting an actuator and a wide variety of valve types. The presented invention is configured such that any actuator can be manufactured, having only one female splined output shaft as a standard and precision inserts, utilizing powder metallurgy, for example, and be configured to transition the output shaft connection to any output shaft specification, providing the manufacturer the ability to manufacture the main drive component in one standard configuration, and convert it into different configurations as required. Thus, the manufacture gains the ability to mass produce one standard part rather than many special parts requiring design and testing for each change and high costs to produce specials. Particularly, the present invention contemplates a system comprising a rack interface for an actuator linear gear, a pinion member configured to interface said rack, the pinion including an internal shaft configuration configured to interface with the valve coupling component.

Abstract: A device is provided for controlling a discharge of a heavy material from a container such as a bucket, hopper or bin. The device generally includes a combination of gears and levers to couple rotation of a hand wheel or other bar to motion of the release door of a container such that the gears provide a force to the release door which is much greater than that applied to the hand wheel or bar. More specifically, the device may consist of a hand-driven shaft capable of being rotated by a hand wheel or other device. The rotation of this shaft may be coupled by interlocking gears to the rotation of a drive shaft, which is attached to the release door of the container by a lever, such that rotation of the drive shaft causes the release door to open or close, regulating the discharge of concrete or other heavy material from the container.

Abstract: A flap valve for a heating and/or air conditioning installation for a motor vehicle has a valve flap which is operated by a control device between an open position and a closed position. The control device comprises a driving lever which is coupled, through a link, to a driven lever fixed to the valve flap. The driving lever is rotated about its axis between an open position and a closed position of the driving lever, during which it passes through an intermediate position near to the closed position. The valve flap is closed when the driving lever reaches its intermediate position, so that the travel of the latter between its intermediate and closed positions is dead travel during which the valve is in the closed position of the valve and the link is in compression so as to change its effective length.

Abstract: The present invention relates to an automatic valve actuating system that is responsive to various externally detected stimuli. The system is comprised of a monitoring and alarm components that close a valve upon the detection of a fault occurring from the undesirable presence of carbon monoxide or combustible gases. Combustible gases, such as, propane, methane, hydrogen and the like can create a hazardous explosive environment, especially when these gases are mixed with the oxygen in the air. The valve actuating apparatus mounts directly to an existing valve, such as one that opens and closes within a quarter of a turn. An audible alarm is given when a hazardous condition is detected. For those who are hearing impaired, an optional visual alarm is also given. A CO.sub.2 cylinder provides a pressure source to operate a pneumatic linear actuator. A low pressure switch sounds a secondary alarm to alert the maintenance personnel to replace the carbon dioxide tank.

Abstract: A hot water tempering system tempers the output of a hot water storage tank by mixing that output with a cold water flow in a defined ratio to produce a flow of water at a steady intermediate temperature. The system comprises a bypass line connectable between an inlet line and an outlet line of the storage tank, and a proportional flow controller for controlling the relative water flow rates through the tank and through the bypass line. The flow controller may be positioned on the inlet line and the bypass line, or on the outlet line and the bypass line. The tempering system allows the temperature of water in the storage tank to be maintained near the boiling point for killing organisms, but at the same time ensures that water leaves the system at a temperature sufficiently low to be safe for human use.

Abstract: A fluid valve assembly includes a housing, a valve, a rotatable driver received in the housing in operative communication with the valve, and an over-center linkage disposed between the driver and the housing. The housing includes an entrance to permit fluid flow into the housing and an exit to allow fluid flow out of the housing. The valve is disposed between the housing entrance and exit. The valve is configured in an open state to permit fluid flow through the housing and in a closed state to block fluid flow through the housing. Rotation of the driver from a first rotational position toward a second rotational position moves the valve from the closed to the open state, and rotation of the driver from the second rotational position to a third rotational position permits the valve to return to a closed state. The over-center linkage biases the driver to either the first or third rotational position.