A pump includes a cylindrical plunger chamber having an inward projecting radial seal. A plunger moves with a reciprocating stroke within the cylindrical plunger chamber, the plunger having a first diameter, and a second diameter less than the first diameter, the radial seal engaging the plunger at the second diameter for an entire length of the stroke of the plunger. A pressure balancing valve is in fluid communication with the pumping chamber and the hydraulic oil chamber. A fluid passage connects to the plunger chamber at a position between the radial seal and the first diameter of the plunger and leads to the pressure balancing valve. A radial clearance is between the cylinder and the second diameter, and a seal between the first portion and the cylinder having a clearance smaller than the radial clearance allows hydraulic fluid to escape past the seal during a plunger stroke.
A pump includes a cylindrical plunger chamber having an inward projecting radial seal. A plunger moves with a reciprocating stroke within the cylindrical plunger chamber, the plunger having a first diameter, and a second diameter less than the first diameter, the radial seal engaging the plunger at the second diameter for an entire length of the stroke of the plunger. A pressure balancing valve is in fluid communication with the pumping chamber and the hydraulic oil chamber. A fluid passage connects to the plunger chamber at a position between the radial seal and the first diameter of the plunger and leads to the pressure balancing valve. A radial clearance is between the cylinder and the second diameter, and a seal between the first portion and the cylinder having a clearance smaller than the radial clearance allows hydraulic fluid to escape past the seal during a plunger stroke.
A valve includes a valve disc movable along an axial direction and has an arcing outer engagement surface with an axis of curvature transverse to the axial direction. A valve seat defines a central opening aligned with the axial direction. The valve seat has a toroidal radially inner engagement surface around the central opening configured to engage the engagement surface of the valve disc in a closed position. The engagement surface of the valve disc and the engagement surface of the valve seat are configured to form a line of contact between the outer engagement surface and the inner engagement surface. The engagement surfaces of the valve disc and of the valve seat may be a carbide or ceramic material having a hardness of 1000 HV or more.
A valve includes a valve disc movable along an axial direction and has an arcing outer engagement surface with an axis of curvature transverse to the axial direction. A valve seat defines a central opening aligned with the axial direction. The valve seat has a toroidal radially inner engagement surface around the central opening configured to engage the engagement surface of the valve disc in a closed position. The engagement surface of the valve disc and the engagement surface of the valve seat are configured to form a line of contact between the outer engagement surface and the inner engagement surface. The engagement surfaces of the valve disc and of the valve seat may be a carbide or ceramic material having a hardness of 1000HV or more.
A regulator valve includes a valve body defining a central bore with a longitudinal axis. A rod couples to a diaphragm and slides along the longitudinal axis within the central bore. The rod has a planar end. A spring, such as a helical spring, mounts in the central bore and engaging the rod. One or more parallel passages are formed in the valve body extend parallel to the bore. One or more slots are formed in the valve body, each of the one or more slots connecting one of the one or more parallel passages to the central bore. The regulator valve may be used in a pumping system as a pressure regulator.
G05D 16/06 - Control of fluid pressure without auxiliary power the sensing element being a flexible member yielding to pressure, e.g. diaphragm, bellows, capsule
F04B 49/00 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups
A regulator valve includes a valve body defining a central bore with a longitudinal axis. A rod couples to a diaphragm and slides along the longitudinal axis within the central bore. The rod has a planar end. A spring, such as a helical spring, mounts in the central bore and engaging the rod. One or more parallel passages are formed in the valve body extend parallel to the bore. One or more slots are formed in the valve body, each of the one or more slots connecting one of the one or more parallel passages to the central bore. The regulator valve may be used in a pumping system as a pressure regulator.
A diaphragm pump system (200) includes a diaphragm pump (100) and a pressure regulator (126). The diaphragm pump (100) has a housing (110) having a pumping chamber (104) containing fluid to be pumped, and a transfer chamber (104) adapted to contain hydraulic fluid. A diaphragm (102) is supported by the housing (110) and at least partially defines a pumping chamber side and a transfer chamber side. A driven plunger (106) slides in a reciprocating motion and forces hydraulic fluid against the diaphragm (102). A first valve (114) allows hydraulic fluid into the transfer chamber (104) and a second valve (116) allows hydraulic fluid to be removed from the transfer chamber (104). A hydraulic fluid reservoir (146) is in fluid communication with the transfer chamber (104). The pressure regulator (126) includes valving (152) that provides a hydraulic fluid pressure above a pumped fluid inlet feed pressure to maintain a proper amount of hydraulic oil in the transfer chamber (104).
A diaphragm pump system (200) includes a diaphragm pump (100) and a pressure regulator (126). The diaphragm pump (100) has a housing (110) having a pumping chamber (104) containing fluid to be pumped, and a transfer chamber (104) adapted to contain hydraulic fluid. A diaphragm (102) is supported by the housing (110) and at least partially defines a pumping chamber side and a transfer chamber side. A driven plunger (106) slides in a reciprocating motion and forces hydraulic fluid against the diaphragm (102). A first valve (114) allows hydraulic fluid into the transfer chamber (104) and a second valve (116) allows hydraulic fluid to be removed from the transfer chamber (104). A hydraulic fluid reservoir (146) is in fluid communication with the transfer chamber (104). The pressure regulator (126) includes valving (152) that provides a hydraulic fluid pressure above a pumped fluid inlet feed pressure to maintain a proper amount of hydraulic oil in the transfer chamber (104).
A diaphragm pump system includes a diaphragm pump and a pressure regulator. The diaphragm pump has a housing having a pumping chamber containing fluid to be pumped, and a transfer chamber adapted to contain hydraulic fluid. A diaphragm is supported by the housing and at least partially defines a pumping chamber side and a transfer chamber side. A driven plunger slides in a reciprocating motion and forcing hydraulic fluid against the diaphragm. A first valve allows hydraulic fluid into the transfer chamber and a second valve allows hydraulic fluid to be removed from the transfer chamber. A hydraulic fluid reservoir is in fluid communication with the transfer chamber. The pressure regulator includes valving that provides a hydraulic fluid pressure above a pumped fluid inlet feed pressure to maintain a proper amount of hydraulic oil in the transfer chamber.
(1) Hydraulically balanced diaphragm pumps for use in industrial processes and equipment.
30.
Diaphragm pump comprising a diaphragm connected to a control element and a pressure protection device mounted to the control element wherein the control element is intermediate the control element and the diaphragm and is configured to seal against a transfer chamber wall
A diaphragm pump includes a transfer chamber containing hydraulic fluid and a pumping chamber for fluid to be pumped. A connecting assembly includes a plunger extending to the transfer chamber. A diaphragm connects to the connecting assembly and separates the transfer chamber and the pumping chamber. A pressure protection device mounts to the connecting assembly and is configured to seal against the transfer chamber when pressure differential, including reverse pressure differential, across the diaphragm exceeds a predetermined value. The pressure protection device is intermediate the plunger and the diaphragm and supports the diaphragm when there is excess pressure differential across the diaphragm.
A diaphragm pump includes a transfer chamber containing hydraulic fluid and a pumping chamber for fluid to be pumped. A connecting assembly includes a plunger extending to the transfer chamber. A diaphragm connects to the connecting assembly and separates the transfer chamber and the pumping chamber. A pressure protection device mounts to the connecting assembly and is configured to seal against the transfer chamber when pressure differential, including reverse pressure differential, across the diaphragm exceeds a predetermined value. The pressure protection device is intermediate the plunger and the diaphragm and supports the diaphragm when there is excess pressure differential across the diaphragm.
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
F04B 43/067 - Pumps having fluid drive the fluid being actuated directly by a piston
F04B 45/033 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows having fluid drive
32.
DEVICE FOR PROTECTING A DIAPHRAGM PUMP FROM PRESSURE DIFFERENTIAL
A diaphragm pump includes a transfer chamber containing hydraulic fluid and a pumping chamber for fluid to be pumped. A connecting assembly includes a plunger extending to the transfer chamber. A diaphragm connects to the connecting assembly and separates the transfer chamber and the pumping chamber. A pressure protection device mounts to the connecting assembly and is configured to seal against the transfer chamber when pressure differential, including reverse pressure differential, across the diaphragm exceeds a predetermined value. The pressure protection device is intermediate the plunger and the diaphragm and supports the diaphragm when there is excess pressure differential across the diaphragm.
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
F04B 43/067 - Pumps having fluid drive the fluid being actuated directly by a piston
F04B 45/033 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having bellows having fluid drive
33.
HYDRAULIC DIAPHRAGM CONTROL USING A SOLENOID VALVE
A diaphragm pump includes a pumping chamber for pumped fluid and a hydraulic chamber. A diaphragm has a pumping chamber side and a hydraulic chamber side. The pumping chamber side of the diaphragm is proximate the pumping chamber and acts on the pumped fluid. The hydraulic chamber side of the diaphragm is proximate the hydraulic chamber. A plunger is in fluid communication with the hydraulic chamber and acts on the hydraulic fluid, which acts on the diaphragm. A plunger driver imparts reciprocal motion to the plunger. The pump includes a sensor assembly sensing position and direction of the plunger and sensing position of the diaphragm. By sensing the position of the diaphragm, hydraulic fluid flow is controlled by a control single valve.
A positive displacement pump includes at least two pumping chambers and associated plungers. Each plunger is driven by an associated variable speed motor, such as a stepper motor, in a reciprocating motion. The stepper motor varies speed during each stroke of the plunger. A controller controls speed and direction of each stepper motor. Each stepper motor is coupled to a leadscrew having an associated guide rod mounted on the leadscrew to move along the leadscrew as the leadscrew rotates and actuate an associated plunger. The controller varies the speed, displacement and duration of the stepper motors' steps to maintain a constant outflow without pulses.
F04B 49/12 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by varying the length of stroke of the working members
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
F04B 23/06 - Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
A diaphragm (18) includes a disk-shaped center planar portion (40) and a first lip (42) and a second lip (44) on the outermost edge of the disk shaped portion (40) and extending transversely to the planar disk portion (40). The first lip (42) is on a first side of the diaphragm (18) and the second lip (44) is on an opposite side of the diaphragm (18). A mounting portion (38) extends outward from the center of the face of the planar portion (40) on the first side of the diaphragm (18). For metering pump applications pumping harsh fluids, the diaphragm (18) is typically made from a fiuoropolymer and in particular may be made from polytetrafluoroethylene (PTFE).
F04B 13/00 - Pumps specially modified to deliver fixed or variable measured quantities
F04B 15/04 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
A diaphragm (18) includes a disk-shaped center planar portion (40) and a first lip (42) and a second lip (44) on the outermost edge of the disk shaped portion (40) and extending transversely to the planar disk portion (40). The first lip (42) is on a first side of the diaphragm (18) and the second lip (44) is on an opposite side of the diaphragm (18). A mounting portion (38) extends outward from the center of the face of the planar portion (40) on the first side of the diaphragm (18). For metering pump applications pumping harsh fluids, the diaphragm (18) is typically made from a fiuoropolymer and in particular may be made from polytetrafluoroethylene (PTFE).
F04B 13/00 - Pumps specially modified to deliver fixed or variable measured quantities
F04B 15/04 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
F04B 43/00 - Machines, pumps, or pumping installations having flexible working members
F04B 43/02 - Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
A diaphragm (18) includes a disk-shaped center planar portion (40) and a first lip (42) and a second lip (44) on the outermost edge of the disk shaped portion (40) and extending transversely to the planar disk portion (40). The first lip (42) is on a first side of the diaphragm (18) and the second lip (44) is on an opposite side of the diaphragm (18). A mounting portion (38) extends outward from the center of the face of the planar portion (40) on the first side of the diaphragm (18). For metering pump applications pumping harsh fluids, the diaphragm (18) is typically made from a fluoropolymer and in particular may be made from polytetrafluoroethylene (PTFE).
F04B 43/067 - Pumps having fluid drive the fluid being actuated directly by a piston
F04B 13/00 - Pumps specially modified to deliver fixed or variable measured quantities
F04B 15/04 - Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
A diaphragm pump includes a housing having a pumping chamber containing fluid to be pumped. The pump has a transfer chamber adapted to contain hydraulic fluid, and a hydraulic fluid reservoir in fluid communication with the transfer chamber. The pump housing forms a cylinder with a piston sliding in a reciprocating motion in the cylinder, the piston defining a piston inner chamber. A valve leads to the piston inner chamber with a valve spool slidably mounted in the piston inner chamber to cover the valve in a first position and uncover the valve in a second position. A diaphragm connects to the valve spool by a plunger. An overfill limiter includes a spacer slidably mounted in the piston inner chamber. A first spring in the piston inner chamber is intermediate the valve spool and the spacer. A second spring is in the piston chamber intermediate the end of the piston inner chamber and the spacer, the second spring having a second spring constant greater than the spring constant of the first spring.
A diaphragm pump includes a housing having a pumping chamber containing fluid to be pumped. The pump has a transfer chamber adapted to contain hydraulic fluid, and a hydraulic fluid reservoir in fluid communication with the transfer chamber. The pump housing forms a cylinder with a piston sliding in a reciprocating motion in the cylinder, the piston defining a piston inner chamber. A valve leads to the piston inner chamber with a valve spool slidably mounted in the piston inner chamber to cover the valve in a first position and uncover the valve in a second position. A diaphragm connects to the valve spool by a plunger. An overfill limiter includes a spacer slidably mounted in the piston inner chamber. A first spring in the piston inner chamber is intermediate the valve spool and the spacer. A second spring is in the piston chamber intermediate the end of the piston inner chamber and the spacer, the second spring having a second spring constant greater than the spring constant of the first spring.
A diaphragm pump includes a housing having a pumping chamber containing fluid. The pump has a transfer chamber containing hydraulic fluid, and a hydraulic fluid reservoir in fluid communication with the transfer chamber. The pump housing forms a cylinder with a piston defining a piston inner chamber and sliding in the cylinder. A valve leads to the piston inner chamber with a valve spool slidably mounted in the piston inner chamber to cover the valve and uncover the valve. A diaphragm connects to the valve spool by a plunger. An overfill limiter includes a spacer slidably mounted in the piston inner chamber. A first spring is intermediate the valve spool and the spacer and a second spring is intermediate the end of the piston inner chamber and the spacer, the second spring having a second spring constant greater than the spring constant of the first spring.
F04B 53/14 - Pistons, piston-rods or piston-rod connections
F04B 53/16 - CasingsCylindersCylinder liners or headsFluid connections
F04B 9/107 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
A diaphragm pump includes a diaphragm cartridge assembly. The diaphragm cartridge is a self-contained unit having a diaphragm defining a pumped fluid side and a hydraulic fluid side and a seat receiving the hydraulic fluid side of the diaphragm and having a center opening. A biasing rod mounts to the diaphragm on the hydraulic fluid side and extending through the opening of the seat. A valve guide at an extended end of the biasing rod and a valve spool slidably mounts on the valve guide. A biasing element engages the seat and the valve guide. The pump may also include valve cartridges including a combined inlet check valve and discharge check valve.
A pump includes a check valve cartridge removably mounted to the pump. The cartridge includes an inlet check valve and a discharge check valve. A connector mounts intermediate the inlet check valve and the discharge check valve. The inlet and discharge check valves each have a valve ball movable between an open position and a closed position, a valve seat engaging the valve member in the closed position, an inlet and an outlet. The check valve cartridge is threadably mounted to the pump or a manifold and is a self-contained assembly
A diaphragm pump, comprising a diaphragm. (33) movable between first and second positions along a first axis; a pumping chamber (24) on one side of the diaphragm the pumping chamber adapted to carry a fluid to be pumped; a transfer chamber (20) on the other side of the diaphragm, the transfer chamber being filled with a hydraulic fluid; first and second one-way valves;.a fluid reservoir in fluid communication with the transfer chamber via the first and second valves; and a valve spool (42) positioned in the transfer chamber control fluid flow through the first and second valves, the valve spool moveable along a second axis that is different from the first axis^ between a plurality of positions relative to openings to the first and second valves.
A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a valve spool. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication with the transfer chamber via at least one valve. The valve spool is configured to control fluid flow between the transfer chamber and the fluid reservoir. The valve spool is movable to open and close an opening into the at least one valve only when an overfill condition or an underfill condition exists in the transfer chamber. The valve spool is moveable along an axis that is non-coaxial with an axis of movement of the diaphragm.
F04B 9/08 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
F04B 43/067 - Pumps having fluid drive the fluid being actuated directly by a piston
F04B 35/02 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being fluid
09 - Scientific and electric apparatus and instruments
Goods & Services
Hydraulically balanced diaphragm pumps for use in industrial processes and equipment automatic metal bypass pressure regulating control valve for regulating the flow and pressure of liquids
A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a spool member. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication with the transfer chamber via at least one valve. The spool member is configured to control fluid flow between the transfer chamber and the fluid reservoir. The spool member is movable to open and close an opening into the at least one valve only when an overfill condition or an underfill condition exists in the transfer chamber.
F04B 9/08 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
F04B 35/02 - Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being fluid
F04B 45/00 - Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
