Abstract: An arrangement (400) for removing condensate from a heat exchanger (208) is provided. The arrangement (400) facilitates removal of a condensate from the heat exchanger (208) even when the pressure inside the heat exchanger drops below pressure of a condensate discharge pipe (220). The arrangement (400) operates in a first configuration when the pressure in the heat exchanger (208) is higher than the pressure in the condensate discharge pipe (220), and in a second configuration when the pressure in the heat exchanger (208) is lower than the pressure in the condensate discharge pipe (220).

Abstract: A system is provided to control fluid flow in a wastewater treatment system through wastewater level manipulation. The wastewater treatment system may include a wastewater treatment plant connected to a plurality of pump stations by a main. Each of the plurality of pump stations may include a wet well with a pump therein. The system may include a central server in communication with a sensor to sense a level of wastewater within the wet well. The pump may be automatically moved to an on position when the level of the wastewater in the wet well is at or above a first level and may be automatically moved to an off position when the level of the wastewater in the respective wet well is at or below a pump cutoff level. The central server may systematically manipulate the first level to selectively set the level of wastewater within the wet well.

Abstract: A liquid dispensing mechanism adapted to achieve an increased inflow and an increased outflow rate and consisting of an inlet line adapted to receive liquid from an external reservoir, and adapted to release aid liquid via an outlet line, said mechanism comprising a pressure chamber adapted to store liquid and provide liquid level to fall or rise as a function of pressure, before release; a buffer chamber adapted to connect with said pressure chamber by means of non-return valves, and further adapted to store liquid before it flows into said pressure chamber, in order to increase flow coefficient of inlet line; float member in said pressure chamber, adapted to sense level of liquid in said pressure chamber by means of position of said float member; multiple valve actuator assembly adapted to actuate a pre-defined configuration of valves, with a time-delay between engaging or disengaging subsequent valves, for controlled engaging or disengaging pressure in a predetermined format; snap action valve actuating me

Abstract: Reductions in energy consumption and maintenance requirements for operating a wastewater treatment plant are achieved by controlling the operation of pumps at pump stations along a force main in a systematic fashion. The operation of the pumps is controlled to manage the flow of wastewater along the force main to minimize energy consumption, to eliminate sediment, to manage peak pressures encountered by smaller pumps and to avoid septic conditions.

Abstract: A liquid pressure-feed device is provided wherein a working fluid discharge port can be connected to a liquid generation source side through an external pipe or can be connected to a liquid inlet port of a closed vessel without going through an external pipe. A closed vessel outer opening for opening a working fluid discharge port outwards of a closed vessel is provided and a communication passage for connecting the working fluid discharge port to a liquid inlet port is formed in the closed vessel. When connecting the working fluid discharge port to the liquid generation source side through an external pipe connected to the closed vessel outer opening, a ring member is used to provide closure between the working fluid discharge port and the liquid inlet port and provide communication between the working fluid discharge port and the closed vessel outer opening. Instead, when connecting the working fluid discharge port to the liquid inlet port, a plug member is used to close the closed vessel outer opening.

Abstract: A liquid dispensing mechanism adapted to achieve an increased inflow and an increased outflow rate and consisting of an inlet line adapted to receive liquid from an external reservoir, and adapted to release aid liquid via an outlet line, said mechanism comprising a pressure chamber adapted to store liquid and provide liquid level to fall or rise as a function of pressure, before release; a buffer chamber adapted to connect with said pressure chamber by means of non-return valves, and further adapted to store liquid before it flows into said pressure chamber, in order to increase flow coefficient of inlet line; float member in said pressure chamber, adapted to sense level of liquid in said pressure chamber by means of position of said float member; multiple valve actuator assembly adapted to actuate a pre-defined configuration of valves, with a time-delay between engaging or disengaging subsequent valves, for controlled engaging or disengaging pressure in a predetermined format; snap action valve actuating me

Abstract: A liquid pressure-feed device is provided wherein, even with a third shaft disposed between a pivot shaft and a second shaft, a sub-arm positioned between the pivot shaft and the second shaft does not obstruct movement of the third shaft. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A liquid discharge valve has a third shaft supported by the float arm, a liquid discharge valve arm mounted to the third shaft, and a liquid discharge valve body mounted to the liquid discharge valve arm to establish and block communication between the interior of the closed vessel and a liquid discharge port. The third shaft is disposed between the pivot shaft and the second shaft and a window is formed in the sub-arm so as not to obstruct movement of the third shaft.

Abstract: A pivoting mechanism for use in a high temperature steam distribution system includes an input member operative to move between a low level position and a high level position. A compression spring having a first end and a second end is also provided. The first end of the compression spring is connected to the input member. A pivot member is operatively connected to the second end of the compression spring. The pivot member rotates in a snap over fashion to a first position when the input member reaches the upper position. When the input member reaches the lower position, the pivot member rotates in a snap over fashion to a second position.

Abstract: Pumps for Steam Condensates and other Liquids, include receivers that may be connected firstly to the liquid source, and after filling are then pressurised to discharge the liquid to a transfer line, or to a vessel at a higher pressure than that of the source. The use of a small pilot valve to detect the liquid level, mounted externally to each receiver, and controlling the opening and closing of the pressurising and venting valves, enables an unusually low profile to be achieved.

Abstract: The present invention is directed to a gas pressure driven liquid pump having a pump body, liquid inlet, liquid outlet, a pair of pump mechanisms each including a float, and a baffle within the pump body creating two chambers within the pump body. A separate pump mechanism is configured to operate in the respective chambers. The baffle includes a void located below a low liquid level position so that a liquid seal is maintained between the two chambers. As the pump body fills with liquid condensate, a high liquid level position will trigger the respective pump mechanisms to allow motive gas into the chambers, pumping the liquid out of the pump body.

Abstract: An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including upper and lower spur gear or gears. The upper spur gear is driven by the working fluid. The lower spur gear is rotated by the first spur gear. The upper and lower spur gears are connected with a common shaft. If upper pairs and lower pairs of spur gears are employed, each upper and lower gear are connected via a common shaft.

Abstract: A liquid pressure-feed device having a reduced number of parts and a simple structure is provided. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A float is connected to the float arm and a change-over valve is connected to the sub-arm through a power transfer shaft. There is provided a stopper shaft supported within the closed vessel, there is formed in the float arm a window through which the stopper shaft extends and which restricts a rotational range of the float arm with floating of the float, and there is formed in the sub-arm a window through which the stopper shaft extends and which restricts a rotational range of the sub-arm with descent of the float.

Abstract: A liquid pressure-feed device is provided wherein, even with a third shaft disposed between a pivot shaft and a second shaft, a sub-arm positioned between the pivot shaft and the second shaft does not obstruct movement of the third shaft. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A liquid discharge valve has a third shaft supported by the float arm, a liquid discharge valve arm mounted to the third shaft, and a liquid discharge valve body mounted to the liquid discharge valve arm to establish and block communication between the interior of the closed vessel and a liquid discharge port. The third shaft is disposed between the pivot shaft and the second shaft and a window is formed in the sub-arm so as not to obstruct movement of the third shaft.

Abstract: A gas pressure driven fluid pump comprising a pump tank having a liquid inlet and a liquid outlet. A float, carried within the interior of the pump tank, is operable to move between a low level position and a high level position. A snap-acting valve is operatively connected to the float. The snap acting valve has a rotatable port member that moves so as to switch to exhaust porting when the float falls to the low level position. The port member further switches to motive porting when the float rises to the high level position. As a result, fluid filling the pump tank causes the float to rise from the low level position to the high level position during exhaust porting. Fluid exiting the pump tank causes the float to fall from the high level position to the low level position due to introduction of motive gas during motive porting.

Abstract: A gas pressure driven fluid pump having a pump tank with a liquid inlet and a liquid outlet. A float assembly is carried within the interior of the pump tank and is movable between a low level position and a high level position. A compression spring is connected between the float assembly and a pivot member. Due to the force applied by the compression spring, the pivot member rotates to a first position when the float reaches its high level position and rotates to a second position when the float reaches its low level position. A valve assembly is connected to said pivot member to switch between motive porting and exhaust porting in a snap over fashion due to rotation of said pivot member between said first position and said second position. A damper system may be connected to the valve assembly to slow movement of the valve assembly between motive porting and exhaust porting.

Abstract: A gas pressure driven fluid pump having an electronic cycle counter. The pump has a pump tank with a liquid inlet and a liquid outlet. A switching mechanism is operative within the pump tank for switching to exhaust porting when the fluid level within the pump tank falls to a low level position and switching to motive porting when the fluid level within the pump tank rises to a high level position. An electrical counter circuit is operatively connected to the pump tank for incrementing a stored count in response to the fluid level within the pump tank rising to a predetermined level.

Abstract: A gas pressure driven fluid pump comprising a pump tank having a liquid inlet and a liquid outlet. A float, carried within the interior of the pump tank, is operable to move between a low level position and a high level position. A snap-acting valve control mechanism uses magnetic interaction to switch between exhaust porting and motive porting. Fluid exiting the pump tank causes the float to fall from the high level position to the low level position due to introduction of motive gas during motive porting. Exhaust porting begins when the float falls to the low level position.

Abstract: A gas pressure driven fluid pump having a pump tank with a liquid inlet and a liquid outlet. A float assembly is carried within the interior of the pump tank and is movable between a low level position and a high level position. A compression spring is connected between the float assembly and a pivot member. Due to the force applied by the compression spring, the pivot member rotates to a first position when the float reaches its high level position and rotates to a second position when the float reaches its low level position. A valve assembly is connected to said pivot member to switch between motive porting and exhaust porting in a snap over fashion due to rotation of said pivot member between said first position and said second position. A damper system may be connected to the valve assembly to slow movement of the valve assembly between motive porting and exhaust porting.

Abstract: A pump has a housing including at least one fluid channel; a motive fluid inlet port; a suction fluid inlet port; and a discharge port. The pump also includes a venturi disposed in the fluid channel of the housing. The venturi is connected by way of the fluid channel to the motive fluid inlet port, the suction fluid inlet port, and the discharge port. A ball check valve is operatively disposed between the motive fluid inlet port and the venturi for controlling the flow of motive fluid. The pump further includes an actuator assembly for actuating the ball check valve. In the preferred embodiment, the ball check valve has only an opened position and a closed position.

Abstract: A pump includes a valve mechanism having an opened position and a closed position. The pump further includes a spring assisted mechanism for selectively moving the valve mechanism between the opened position and the closed position, and a fluid detector for detecting the level of a pumping fluid. The fluid detector is pivotally connected to the spring assisted mechanism and has a first range of pivotal travel and a second range of pivotal travel. The fluid detector further engages a spring of the spring assisted mechanism only at one portion of the first range of pivotal travel, and engages the spring of said spring assisted mechanism only at one portion of the second range of pivotal travel. The fluid detector is disengaged from the spring of the spring assisted mechanism at all other portions of the first range of pivotal travel and of the second range of pivotal travel.

Abstract: A motive pump assembly comprising a hollow housing having an inlet valve and outlet valve for a fluid to be pumped, an inlet valve for a motive fluid operatively between open and closed positions, a vent valve and means for simultaneously opening and closing the inlet valve and vent valve for the motive fluid, and a float and over center linkage mechanism operatively connected to said valve actuating means, whereby the mechanism snaps over center when the float is located at upper and lower limit positions thereby producing a pumping action of fluid to be pumped through the housing and positive stop means ensuring over center tripping action of the linkage when the float is at opposing upper and lower limit positions.

Abstract: A motive pump assembly comprising a hollow housing having an inlet valve and outlet valve for a fluid to be pumped, an inlet valve for a motive fluid operatively between open and closed positions, a vent valve and means for simultaneously opening and closing the inlet valve and vent valve for the motive fluid, and a float and over center linkage mechanism operatively connected to said valve actuating means, whereby the mechanism snaps over center when the float is located at upper and lower limit positions thereby producing a pumping action of fluid to be pumped through the housing and positive stop means ensuring over center tripping action of the linkage when the float is at opposing upper and lower limit positions.

Abstract: A combination pump and trap is disclosed which includes a snap-over mechanism useful for small floats with little buoyancy. The snap-over mechanism has a geometry in which the distance between the float or compression arm pivot point and the pivot for the portion of the spring connected to a first arm or toggle link is greater than the distance from the float or compression arm pivot point and the pivot for the portion of the spring connected to the float or compression arm. This geometry allows the magnification of buoyancy by the main arm which is transmitted to the first toggle link to be large and the magnification of buoyancy by the first toggle link which is transmitted to the change-over valve to be large. A trap which is connected to the float arm is also used, which allows a liquid seal to be maintained at the liquid discharge port.

Abstract: A liquid forced-feed apparatus has a built-in float in a hermetic vessel provided with a working fluid inlet port, a working fluid discharge port, a forced-feed liquid inlet port, and a forced-feed liquid discharge port. A snap mechanism which is actuated to operate the working fluid inlet port and the working fluid discharge port with the upward and downward strokes of the float, to thereby force a liquid in the hermetic vessel out through the forced-feed liquid discharge port. A power transmitting shaft for transmitting the upward-and-downward movement of the float to the snap mechanism extends out of the hermetic vessel. The snap mechanism is disposed outside of the hermetic vessel.

Abstract: The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating device for setting and/or limiting a volume flow delivered by the delivery device.

Abstract: A pump trap assembly with multiple pivot axes. The pump trap assembly includes a mounting bracket for mounting the trap assembly to a structure. A first pivot arm having a length is pivotally mounted to the mounting bracket about a first pivot axis. A second pivot arm having a length is also pivotally mounted to the mounting bracket about the first pivot axis. A spring is used to bias the first and second pivot arms toward each other. A float arm having a length is also pivotally mounted to the mounting bracket about a second pivot axis. The second pivot axis is a distance from the first pivot axis. An actuator is pivotally mounted to the second pivot arm about a third pivot axis. The third pivot axis may be the same as the second pivot axis or may be a distance from the first and second pivot axes. Movement of the float arm in a first direction causes the spring to urge the second pivot arm in the first direction and move the actuator in the first direction.

Abstract: A cylindrical perforated member is mounted between a working fluid inlet port and a hermetic vessel that a working fluid supplied into the hermetic vessel at the working fluid inlet port will not directly contact the forced-feed liquid surface. At the working fluid inlet port is mounted a ring-shaped member with a divergent section having the smallest flow passage area. The working fluid stream is deflected and dispersed by the cylindrical perforated member, to produce a pressure for feeding the liquid rapidly within the hermetic vessel, thus enabling the rapid forced-feed of the liquid.

Abstract: A pressure powered pump has valve members 18, 20 operated by a float acting through an overcenter mechanism 24. The overcenter mechanism has a valve actuating lever 36, on which are provided actuating pins 46, 48 for engagement with the respective valve members 18, 20. When the valves are closed, there is a substantial clearance a between the actuating pins 46, 48 and the respective valve member or its stem 50. This causes the actuating pin 46, 48 to apply an impact to the-valve member 18, 20, so assisting its opening movement. Stops 58, 60 are provided to arrest the valve actuating member 36 at its stable end position, so avoiding high impacts being applied to the valve members 18, 20 when they close.

Abstract: A gas powered pump tank is alternately filled with liquid such as water at low pressure, and then emptied by gas pressure such as from pressurized steam. An auxiliary exhaust assist valve opens at a threshold pressure after switching from the pumping phase to the filling phase to more quickly vent the pressure in the tank and minimize obstruction of the incoming flow of liquid. The pump tank has inlet and outlet check valves for the liquid, permitting flow only in a positive pumping direction. A gas inlet valve and a primary gas exhaust valve are controlled by an alternating mechanism such as a float with a snap action toggle that opens one of the gas valves while closing the other. The auxiliary exhaust assist valve has a valve body spring biased inwardly of the tank, and opens at a pressure lower than the pumping pressure, thereby venting the tank more rapidly and also assisting in venting any additional steam produced by boiling of the water or other liquid.

Abstract: A liquid forced-feed apparatus, such as a steam trap or pump-trap combination, simplified in construction by decreasing the number of component parts, and capable of switching a change-over valve smoothly with reduced buoyancy. A float, a change-over valve and a snap mechanism are built in a hermetic vessel. The snap mechanism includes a float arm which rotates around a first shaft, a sub-arm which rotates around a second shaft, a spring bracket section formed on the float arm, a spring bracket section formed on the sub-arm, and a reversible plate spring disposed between the spring bracket sections. The float is connected to the float arm, and the change-over valve is connected to the sub-arm.

Abstract: A snap-over toggle linkage valve actuating mechanism for alternately opening and closing a gas inlet valve and a gas outlet valve utilizes a plurality of stiff compression coil springs of an axial length preferably less than four times the coil turn diameter mounted between oppositely facing end plates, with the compression coil ends carried by circular bosses symmetrically positioned on the faces of the opposing faces of the end plates bearing the coil springs and constituting a second toggle link for the snap-over valve actuating mechanism. A gas pressure and a vent valve assembly consists of a valve actuator rod operatively coupled to the first toggle link and terminating in a right angle valve actuator plate fixed thereto at an off center lateral position. The valve actuator plate detachably mounts a valve stem of a poppet type vent valve whose large diameter plug seats in a chamfered valve seat radially outward of a combined guide plate and valve seat.

Abstract: A combination pump and trap is disclosed which includes a snap-over mechanism useful for small floats with little buoyancy. The snap-over mechanism has a geometry in which the distance between the float or compression arm pivot point and the pivot for the portion of the spring connected to a first arm or toggle link is greater than the distance from the float or compression arm pivot point and the pivot for the portion of the spring connected to the float or compression arm. This geometry allows the magnification of buoyancy by the main arm which is transmitted to the first toggle link to be large and the magnification of buoyancy by the first toggle link which is transmitted to the change-over valve to be large. A trap which is connected to the float arm is also used, which allows a liquid seal to be maintained at the liquid discharge port.

Abstract: A combination pump and trap is disclosed which includes a snap-over mechanism useful for small floats with little buoyancy. The snap-over mechanism has a geometry in which the distance between the float or compression arm pivot point and the pivot for the portion of the spring connected to a first arm or toggle link is greater than the distance from the float or compression arm pivot point and the pivot for the portion of the spring connected to the float or compression arm. This geometry allows the magnification of buoyancy by the main arm which is transmitted to the first toggle link to be large and the magnification of buoyancy by the first toggle link which is transmitted to the change-over valve to be large. A trap which is connected to the float arm is also used, which allows a liquid seal to be maintained at the liquid discharge port.

Abstract: In float actuated pump having a rod and lever actuation from the float, an improved connect between the rod and lever is disclosed enabling valve opening substantially free of constraint by the rod and attached fittings. Such arrangement also enabling exhaust valve opening in a two-step momentum inducing method. Specifically, a valve actuating lever biased by a counter weight at one lever end, connects to the operating rod at the improved joint at the other lever end. The end of the rod is provided with an arcuate slot made of magnetic attractive material. The lever connects at a lever pin to the arcuate slot. The curvature of the slot prevents towards and away movement of the rod; the length of the slot gives free up and down rod movement at the lever pin within the elongate slot. At the top of the travel of the arcuate slot, a magnet is included in the pump head.

Abstract: A device for feeding liquid under pressure comprises a vessel having an operating fluid inlet, an operating fluid outlet, an inlet opening for the liquid to be fed under pressure and an outlet opening for the liquid to be fed under pressure; a float disposed within said vessel; a change-over valve for alternately switching the operations of opening and closing the operating fluid inlet and outlet in response to the movement of the float; and a link mechanism. The link mechanism comprises a valve operating rod connected to the change-over valve and a compression spring supported at one end thereof by the valve operating rod and adapted not to cross any fulcrum at the time of operation thereof, and operates to move the valve operating rod in a snap motion in response to the movement of the float. The compression spring is supported by the valve operating rod so that the vector of action of the compression spring passes onto the point connecting the compression spring with the valve operating rod.

Abstract: A snap-over toggle linkage valve actuating mechanism for alternately opening and closing a gas inlet valve and a gas outlet valve, has a pair of spring preload arms pivotably mounted to a fixed mainframe within a sealed pressure vessel for pivoting about a first pivot axis. A first toggle link is pivoted at a first end to the mainframe about the pivot axis A. A second toggle link preferably a compression coil spring under precompression is pivoted at one end about a second pivot axis C parallel to the first pivot axis A on said pair of spring preload arms. The second end of the first toggle link is pivoted to a second end of the second toggle link for pivoting about a third axis B parallel to axes A and C.

Abstract: A pump apparatus for pumping undergound fluids from a well. The pump includes inner and outer chambers, and a float slidable within the outer chamber. A source of compressed air is directed to a valve on the pump. The valve controls the flow of the compressed air into the outer chamber during the pumping cycle, and also controls the opening of a vent during the intake cycle. The float, while sliding up and down within the outer chamber in response to the fluid level within the chamber, activates the valve to begin the pumping of fluid when the chamber is full. When the chamber is empty, the float activates the valve is turn off the compressed air.

Abstract: An automatic gas operated downhole fluid pump having an elongated cylindrical chamber for receiving fluid and having a concentrically mounted cylindrical float which is connected to a valve having an actuator biased and retained in either an opened or closed position with an elongated control rod connected with the valve actuator and extending through a passageway through the cylindrical float with adjustable means to adjustably connect the control rod with the cylindrical float to apply force to the actuator only when it is desired to actuate the valve.

Abstract: A sewage system wherein a sewer line for delivering sewage to a discharge point and a compressed air line extend adjacent to each other. A pluraity of tanks at spaced points and serving to collect sewage from different sources are connected to the sewer line and to the air line. Each connection of a tank with the air line is controlled by a multiple stage valve means which normally vents the tank and prevents air flow to the tank. Each multiple stage valve means includes a pilot valve controlled by float means in the associated tank and a pneumatically activated valve. Check valves are interposed adjacent each tank at the sewage collection and sewage discharge points thereof.

Abstract: A snap-over toggle linkage valve actuating mechanism for alternately opening and closing a gas inlet valve and a gas outlet valve, has a pair of spring preload arms pivotably mounted to a fixed mainframe within a sealed pressure vessel for pivoting about a first pivot axis. A first toggle link is pivoted at a first end to the mainframe about the pivot axis A. A second toggle link preferably a compression coil spring under precompression is pivoted at one end about a second pivot axis C parallel to the first pivot axis A on said pair of spring preload arms. The second end of the first toggle link is pivoted to a second end of the second toggle link for pivoting about a third axis B parallel to axes A and C.