US3857517A - Anti-siphon and pump priming for sewage grinder pump - Google Patents

Anti-siphon and pump priming for sewage grinder pump Download PDF

Info

Publication number
US3857517A
US3857517A US00398469A US39846973A US3857517A US 3857517 A US3857517 A US 3857517A US 00398469 A US00398469 A US 00398469A US 39846973 A US39846973 A US 39846973A US 3857517 A US3857517 A US 3857517A
Authority
US
United States
Prior art keywords
pump
sewage
liquid
grinder
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00398469A
Other languages
English (en)
Inventor
R Grace
Luik F Van
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Environment One Corp
Original Assignee
Environment One Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Environment One Corp filed Critical Environment One Corp
Priority to US00398469A priority Critical patent/US3857517A/en
Priority to IT31198/73A priority patent/IT1003219B/it
Priority to FR7340279A priority patent/FR2206283B1/fr
Application granted granted Critical
Publication of US3857517A publication Critical patent/US3857517A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0053—Venting means for starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1076—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member orbits or wobbles relative to the other member which rotates around a fixed axis

Definitions

  • ABSTRACT Sewage enters and fills a receiving; tank to a predetermined maximum level before being pumped through a discharge passage by'means of a grinder and pump, with a check valve being provided in the discharge passage to prevent back flow of sewage, in combina tion with a conduit connected to the discharge passage between the pump pressure side and the back flow preventing check valve.
  • the conduit provides air through a differentially operable check valve to the discharge line for anti siphoning protection and will further provide reverse airflow from the pump into the tank to prime the pump as well as to prevent discharge of liquid sewage out of the conduit into the tank.
  • the conduit opens above the maximum predetermined level that actuates the grinder-pump, and is well above the pump suction inlet and pump working chamber.
  • the sewage pump storage grinder disclosed in Grace US. Pat. No. 3,667,692, issued June 6, 1972 employs a check valve in its discharge passage for the purpose of preventing sewage back flow.
  • this check valve could open and allow withdrawal of all sewage or liquid within the pump chamber and in the tank down to the pump suction inlet, thus destroying the pump prime.
  • air may be trapped in the pump chamber. This greatly increases the friction between the pump working surfaces and a corresponding increase in wear and hence may prevent proper operation of the pump.
  • the pump chamber when the pump storage grinder is first installed, the pump chamber will be completely dry and may not fill with liquid, due to back pressure from the pressure system of which it comprises a part, even though the liquid sewage within the tank rises to the maximum predetermined level. Thus, it may be necessary to open the normally sealed tank and separately prime the pump. Further, it is desirable to prevent siphoning effects .when employing a multiplicity of pump storage grinder units in a pressurized sewage system having liquid sewage normally in all of its lines, because leakage in an individual home at a low level can be siphoning withdraw sewage from the surrounding lines and tanks to create a considerable flooddischarge of the pump and the starting transients imposed on the grinder pump motor are greatly reduced.
  • a check valve is provided in the discharge passage to prevent back flow of sewage, in combination with a conduit connected to the discharge passage between the pump pressure side and the back flow preventing check valve.
  • This conduit includes a second differentially operated check valve which provides two-way airflow through the valve to the discharge line to prevent siphoning and assure proper priming, and also acts as a check valve while the pump storage grinder is operating to prevent recirculation of the liquid sewage pump discharge back into the storage tank of the unit.
  • the pump is preferably of the positive displacement helical screw type employing a flexible boot with an internal helical surface in cooperative working engagement with a rigid shaft having an external helical surface, but of a different pitch.
  • the shaft that drives the pump preferably has at its lower end, within the pump suction inlet, a grinder for macerating the sewage.
  • a tank 10 has a sealed upper cover 11 and a sewage inlet 12.
  • the sewage is pumped from the tank through a pump suction inlet 13, is ground by a grinder macerator 14, is positively pumped through pump working chamber 15 due to the helical screw pumping action in a well known manner, passes under increased pressure through discharge passage elbow 16, discharge passage 17, coupling 18, discharge passage pipe 22, a first check valve 23, andoutlet 24 which is connected to a gravity fall sewage line or pressurized sewage line leading ultimately to a sewage disposal site.
  • the pump is actuated automatically by a level control (not shown) whenever the sewage within the tank 10 rises to a pre determined maximum level as determined by the sensor receiving a pressure head through pipe 25.
  • a level control (not shown) whenever the sewage within the tank 10 rises to a pre determined maximum level as determined by the sensor receiving a pressure head through pipe 25.
  • the pump storage grinder unit as shown in the FIG- URE is used in a pumping network of pressurized sewage lines, particularly a pressurized system wherein pressurized liquid is maintained in all of the network lines, a break in one of the low lines, that is below the unit shown in the FIGURE, would produce a suction in outlet pipe 24 and have a siphoning effect that would draw sewage from the discharge passage through check valve 23.
  • This siphoning effect could destroy the prime on the pump by removing all of the liquid wastewater including liquid from the sewage within the tank down to the bottom-most portion of the pump suction inlet 13, and allow the passage of considerable liquid wastewater through the above-mentioned broken line of the pressurized system with possible undesirable flooding effects on other units of a pressure sewer system, particularly if the units are installed in housing basements. While the check valve 23 desirably prevents the back flow of sewage from the outlet to the pump, it alone will not prevent such siphoning effects.
  • a conduit 19 sealingly secured to and opening into the discharge passage pipe 22 at its lower one end and extending upwardly to its other terminal free end 21.
  • the conduit 19 has mounted therein a second, differentially operated check valve 20 to allow for the flow of air to and from its open end 21 to the end thereof connected to the discharge pipe 22 at a point intermediate the discharge of pump 15 and first check valve 23 for anti siphoning and priming as will be explained later.
  • the check valve 20 will close due to the action of the pressurized liquid sewage which may be at a pressure of the order of 40 p.s.1.
  • the liquid level actuated grinder pump unit is set so that the maximum level of liquid wastewater and sewage collected in tank normally does not rise above the open end of conduit (19) unless a failure or power outage occurs.
  • an air space normally exists in the space within tank (10) above the liquid level of the sewage and wastewater. This space is vented to atmosphere through the inlet opening (12) and through the normally installed plumbing system stack vent to atmosphere of the house or other structure in which theunit is installed. As disclosed in U.S. Pat. No. 3,667,692, it is also possible to separately vent this space to atmosphere.
  • the space in tank (10) over the level of the liquid wastewater and sewage collected therein comprises a source of venting gas.
  • check valve 20 is designed and installed in a manner such that it differentiates between air and liquid fluid in its operation.
  • such differential action is achieved with a gravity operated flapper closure member 29 which normally hangs open.
  • a gravity operated flapper closure member 29 which normally hangs open.
  • air is readily drawn through the valve 20 around the normally open flapper closure member 29 to break the siphoning effect and prevent pump from losing its prime.
  • only a small amount of sewage will be drawn through the outlet pipe 24 upon the occurrence of siphoning to thereby minimize possible flooding of other units in a system, and thereafter the siphoning effect will be broken by the passage of air through differentially operated check valve 20.
  • This same minimal siphoning effect is achieved throughout a pressurized system employing numbers of such pump storage grinder units thereby greatly reducing the threat of undesired flooding of any one of the units in the system.
  • the differentially operated check valve 20 also serves the dual function of facilitating priming of the pump 15 either when it isinitially installed and placed in operation or afterit has lost its prime for some reason such as servicing.
  • the gravity operated flapper closure member 29 normally hangs open. Consequently, air can flow around it readily in either direction.
  • differentially operated valve 20 In the absence of differentially operated valve 20, the back pressure of the system network of piping acting on check valve 23 would prevent check valve 23 from opening, thus pressuring the pump housing 15, and preventing priming of the pump.
  • differentially operated valve 20 (whose gravity operated flapper closure member 29 normally hangs open), allows the air being forced out through macerator 14, pump housing 15 and discharge pipe 17 to be vented to the top of tank since the low velocity air being vented is not adequate to close flapper closure member 29. This is to be contrasted to the high pressure liquid discharge produced while pump 15 is operated, and which is more than adequate to assure closure of the flapper closure member 29.
  • check valve 20 is a differentially operated check valve that differentiates between liquid and gaseous fluids, and allows two way flow of gaseous fluids while preventing flow of liquid fluids out of the free end (21) of conduit (19) back into tank (10).
  • valve 20 will be sealed closed in the normal manner of a check valve by the pressure of the sewage discharge.
  • the differentially operated check valve opens to provide anti siphoning in the above described manner.
  • the actual construction of the schematically shown check valves 20, 23 may be of any type, but preferably they are of the flapper type shown and described.
  • an appropriate sensor causes the grinder pump unit to turn off.
  • the discharge pressure at its outlet will drop below the operating pressure head of the sewage in the receiving low pressure sewage main and the check valve (23) will close thus preventing backflow of pressurized sewage from the receiving main into the grinder pump unit and its collection tank (10). Since the collection tank (10) is vented to atmosphere through the inlet pipe (12) (and the normal housing plumbing vent), the liquid trapped in the column (22) and conduit (17) will drain out due to gravity through the pump (15) stator and rotor which do not act as a positive seal.
  • An anti-siphoning pumping system for liquids comprising'a receiving tank having an inlet and an outlet, pump means having a suction inilet below the liquid level in said tank for tanking suction on the contents of the tank and discharging the same under increased pressure from an outlet, a discharge passage connected to the outlet from said pump means for discharging liquid from said tank under pressure through said tank outlet, first check valve means coupled to said discharge passage permitting fluid flow only in the direction from said pump outlet to said tank outlet and to prevent backflow of pressurized liquid, conduit means connected at one end to said discharge passage between said first check valve means and said pump outlet, said conduit means being freely open at its other end to a source of venting gas, and'second differentially operable check valve means within said conduit means for passing gaseous fluids through said conduit means in either direction and for preventing the passage of liquid from said one end to said open end of said conduit means.
  • An anti-siphoning pumping system further including level control means for actuating the pump means upon the liquid within the tank reaching a predetermined maximum level, and wherein the pump means has its suction inlet substantially below the maximum level, the open end of said conduit means opens directly into the receiving tank at a level substantially above said predetermined maximumlevel, and the receiving tank is vented to atmosphere.
  • An anti-siphoning pumping system comprising a sewage pump grinder for grinding and discharging under pressure raw sewage collected in the receiving tank, a sewage grinder macerator mounted within the pump suction inlet to grind sewage before it passes through the pump means
  • the pump means comprises a positive helical screw-type pump employing a flexible boot with an internal helical surface in cooperative working engagement with a rigid shaft having an external helical surface, but of a different pitch, the discharge from said helical screw-type pump being directly connected to said discharge passage, the inlet to said pump means being mounted below said maximum predetermined level and said maximum predetermined level being below the open end of said conduit means; said conduit means and said second differentially operable check valve means constituting pump priming means for relieving build-up gaseous fluids and allowing liquid sewage to rise through the suction inlet into the flexible boot of the pump means as the liquid sewage within said tank rises to said predetermined maximum level that actuates the pump means.
  • conduit means and said second differentially operable check valve means comprise anti-siphon means for preventing the removal of the pump liquid prime and liquid from said tank below the level of the point of connection of the conduit means to the discharge passage upon vacuum being produced in said discharge line due to siphoning whereupon said anti-siphon means allows removal of the liquid sewage in said discharge line down to the point of connection of said conduit means and thereafter provides passage of venting air through said conduit means open end and through said second differentially operable check valve means into said discharge line.
  • a sewage grinder pump for taking suction on a sewage collection tank that receives liquid sewage containing entrained solids from a sewage generating site, said sewage grinder pump having a discharge passage and a suction inlet and being adapted to be mounted within a collection tank for taking suction on the contents of the tank and discharging ground liquid slurry sewage under pressure from the discharge passage to a pressurized sewage main, first check valve means coupled to said discharge passage for permitting ground liquid slurry flow only in one direction from said discharge passage to the pressurized sewage main and to prevent backflow of pressurized liquid slurry sewage, and second differentially operable check valve means coupled to a source of venting gas and to said discharge passage at a point intermediate the first check valve means and the grinder pump for passing gaseous fluids in either direction through said discharge passage to or from said grinder pump preventing flow of liquid therethrough in a direction from said discharge passage to said source of venting gas and allowing liquid sewage collected in the tank to rise within the grinder pump for self-priming said
  • a sewage grinder pump further including sewage level control means for sensing the liquid sewage level and actuating the grinder pump upon the sewage level in a collection tank reaching a predetermined maximum level, and wherein the grinder pump is adapted to have its suction inlet substantially below the predetermined maximum liquid level of a collection tank upon being mounted therein, and the second differentially operable check valve means opens directly into a collection tank in which the grinder pump is mounted at a level substantially above the predetermined maximum level.
  • a sewage grinder pump comprises a positive helical screw-type pump employing a flexible boot with an internal helical surface in cooperative working engagement with a rigid shaft having an external helical surface, but of a different pitch, the discharge from said helical screw-type pump being directly connected to said discharge passage, the grinder pump being mounted in a collection tank below the maximum predetermined level and the maximum predetermined level being below the open end of the conduit means; the conduit means and the second differentially operable check valve means constituting pump priming means for relieving build-up of gaseous fluids and allowing liquid-sewage to rise through the suction inlet into the flexible boot of the grinder pump as the liquid sewage within a collection tank rises to a predetermined maximum level that actuates the grinder pump.
  • conduit means and the second differentially operable check valve means also comprise antisiphon means for preventing the removal of the pump liquid prime and liquid from a collection tank below the level of the point of connection of the conduit means to the discharge passage upon a vacuum being 10.
  • a low pressure sewage grinder pump system including in combination a collection tank, grinder means having its inlet taking suction on the liquid sewage contents of the tank and discharging ground liquid slurry sewage from an outlet, positive displacement pump means having an inlet connected to the outlet from said grinder means and providing a discharge flow of ground liquid slurry sewage under pressure from its outlet irrespective of the pressure head into which the discharge is directed, a discharge passage connected to the outlet from said pump means for discharging ground liquid slurry sewage from said tank under pressure, first check valve means within said discharge passage permitting liquid sewage flow only in the direction from the outlet of said pump means to the receiving point and preventing backflow of pressurized liquid sewage, first conduit means connected at one end to said discharge passage and freely open at its other end to a source of venting gas, second differentially operable anti-siphon check valve means within said first conduit means for passing gaseous fluids through said conduit means in either direction and for preventing the passage of liquid sewage from said one end to said open end of said first conduit means.
  • a low pressure sewage grinder pump system wherein said positive displacement pump means comprises a positive helical screw-type pump employing a flexible boot with an internal helical surface in cooperative working engagement with a rigid shaft having an external helical surface, but of a different pitch, the discharge from said helical screw-type pump being directly connected to said discharge passage, said first conduit means and said second differentially operable check valve means comprising pump priming means for relieving build-up of gaseous fluids in the pump means and allowing liquid sewage to rise through the suction inlet into the flexible boot of the pump means as liquid sewage accumulates within the collection tank to some predetermined maximum level and actuates the pump means.
  • a low pressure sewage grinder pump system according to claim 11 wherein said first conduit means and said second differentially operable check valve means also comprise anti-siphon means for preventing the removal of the pump liquid prime and liquid from said collection tank below the level of the point of connection of the first conduit means to the discharge passage upon a vacuum being produced in said discharge line due to siphoning, said anti-siphoning means allowing removal of liquid sewage in said discharge line down to the point of connection of said first conduit means and thereafter providing passage of venting gas through said first conduit means open end and through said differentially operable check valve means into said discharge line.
  • a low pressure sewage grinder pump system according to claim 12 wherein said discharge passage is permanently sealed with respect to the interior of said collection tank between said outlet from said pump and said first conduit means, the interior of said collection tank is vented to the atmosphere, said first conduit means is sealed and uninterrupted between its one end connected to the discharge passage and its open end save for the second differentially operable check valve means and the open end of said first conduit means opens directly into said collection tank at a level substantially above the maximum predetermined level of sewage collected in the tank.
  • a low pressure sewage grinder pump including in combination grinder pump means designed for mounting within the interior of a sewage collection tank and having an inlet taking suction on the liquid sewage contents of the tank and discharging ground liquid slurry sewage from an outlet; said grinder pump means including positive displacement pump means having its inlet connected to the outlet from the grinder means and providing a discharge flow of ground liquid slurry sewage under pressure from its outlet irrespective of the pressure head into which the discharge is directed, a discharge passage connected to the outlet from said pump means for discharging ground liquid slurry sewage from said tank under pressure; first check valve means within said discharge passage permitting liquid sewage flow only in the direction from the outlet of said pump means and preventing backflow of pressurized liquid sewage; first conduit means connected at one end to said discharge passage and freely open at its other end to a source of venting gas; and second differentially operable anti-siphon check valve means within said first conduit means for passing gaseous fluids through said conduit means in either direction and for preventing the passage of liquid sewage from said one end to said open
  • a low pressure sewage grinder pump comprises a positive helical screw-type pump employing a flexible boot with an internal helical surface in cooperative working engagement with a rigid shaft having an external helical surface, but of a different pitch, the discharge from said helical screw-type pump being directly connected to said discharge passage, said first conduit means comprising pump priming means for relieving build-up of gaseous fluids in the pump means and allowing liquid sewage to rise through the suction inlet into the flexible boot of the pump means as liquid sewage accumulates within a collection tank in which the grinder pump is mounted to some predetermined maximum level.
  • a low pressure sewage grinder pump according to claim 15 wherein said first conduit means and said second differentially operable check valve means also comprise anti-siphon means for preventing the removal of the pump liquid prime and liquid from a collection tank in which the grinder pump is mounted below the level of the point of connection of the first conduit means to the discharge passage upon a vacuum being produced in said discharge line due to siphoning, said anti-siphoning means allowing removal of liquid sewage in said discharge line down to the point of connection of said first conduit means and thereafter providing passage of venting gas through said first conduit means open end and through said differentially operable check valve means into said discharge line.
  • a low pressure sewage grinder pump according to claim 16 wherein the collection tank in which the grinder pump is designed to be mounted is vented to atmosphere, the discharge passage is permanently sealed with respect to the interior of the collection tank in which the grinder pump is mounted between the outlet from said pump and said first conduit means, said first conduit means is sealed and uninterrupted between its one end connected to the discharge passage and its open end save for the second differentially operable check valve means and the open end of the first conduit means is designed to open directly into the collection tank in which the grinder pump is mounted at a level substantially above the maximum predetermined level of sewage collected in the tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
US00398469A 1972-11-13 1973-09-18 Anti-siphon and pump priming for sewage grinder pump Expired - Lifetime US3857517A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US00398469A US3857517A (en) 1972-11-13 1973-09-18 Anti-siphon and pump priming for sewage grinder pump
IT31198/73A IT1003219B (it) 1972-11-13 1973-11-12 Dispositivo anti sifone di ade scamento di pompa per una pompa con trituratore di rifiuti solidi in acque luride
FR7340279A FR2206283B1 (enExample) 1972-11-13 1973-11-13

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30571272A 1972-11-13 1972-11-13
US00398469A US3857517A (en) 1972-11-13 1973-09-18 Anti-siphon and pump priming for sewage grinder pump

Publications (1)

Publication Number Publication Date
US3857517A true US3857517A (en) 1974-12-31

Family

ID=26974739

Family Applications (1)

Application Number Title Priority Date Filing Date
US00398469A Expired - Lifetime US3857517A (en) 1972-11-13 1973-09-18 Anti-siphon and pump priming for sewage grinder pump

Country Status (3)

Country Link
US (1) US3857517A (enExample)
FR (1) FR2206283B1 (enExample)
IT (1) IT1003219B (enExample)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904131A (en) * 1973-10-25 1975-09-09 Environment One Corp Pressure sewer system
US3938744A (en) * 1974-09-05 1976-02-17 Allen Clifford H Positive displacement rotary pump and drive coupling therefor
US4822213A (en) * 1987-12-30 1989-04-18 Environment/One Corporation Narrow accessway sewage collection tank assembly, remote operated quick connect-disconnect coupling and system using the same
WO1994026416A1 (en) * 1993-05-11 1994-11-24 Environment One Corporation Readily installed universal sewage grinder pump
US5553794A (en) * 1994-12-22 1996-09-10 Tarby Inc Sewage handling system
US5562254A (en) * 1994-08-02 1996-10-08 Environment One Corp. Grinder pump station
US5816510A (en) * 1994-08-02 1998-10-06 Environment One Corporation Grinder pump station
US6059208A (en) * 1997-09-11 2000-05-09 Interon Corporation Buried plastic sewage sump
US20120085688A1 (en) * 2009-06-23 2012-04-12 Zoeller Pump Company, Llc Grinder pump basin system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335435A1 (de) * 1983-09-30 1985-04-04 Willi 4973 Vlotho Cordes Behaelter fuer eine abwasser-pumpstation
ZW1993A1 (en) * 1992-02-17 1993-06-02 Fluid Holdings Ltd Starting positie displacement pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US207260A (en) * 1878-08-20 Improvement in sewer-traps
US1472560A (en) * 1921-07-11 1923-10-30 Francis H Griffiths Liquid-pumping apparatus
US2062516A (en) * 1936-01-14 1936-12-01 Hoffman Gas & Electric Heater Anti-siphoning device
US3346000A (en) * 1963-09-26 1967-10-10 Gen Electric Anti-siphon device for an automatic washer
US3575521A (en) * 1968-11-05 1971-04-20 Gorman Rupp Co Air release valve for self-priming centrifugal pump
US3667692A (en) * 1970-04-09 1972-06-06 Environment One Corp Pump storage grinder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US207260A (en) * 1878-08-20 Improvement in sewer-traps
US1472560A (en) * 1921-07-11 1923-10-30 Francis H Griffiths Liquid-pumping apparatus
US2062516A (en) * 1936-01-14 1936-12-01 Hoffman Gas & Electric Heater Anti-siphoning device
US3346000A (en) * 1963-09-26 1967-10-10 Gen Electric Anti-siphon device for an automatic washer
US3575521A (en) * 1968-11-05 1971-04-20 Gorman Rupp Co Air release valve for self-priming centrifugal pump
US3667692A (en) * 1970-04-09 1972-06-06 Environment One Corp Pump storage grinder

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3904131A (en) * 1973-10-25 1975-09-09 Environment One Corp Pressure sewer system
US3938744A (en) * 1974-09-05 1976-02-17 Allen Clifford H Positive displacement rotary pump and drive coupling therefor
USRE29626E (en) * 1974-09-05 1978-05-09 Positive displacement rotary pump and drive coupling therefor
US4822213A (en) * 1987-12-30 1989-04-18 Environment/One Corporation Narrow accessway sewage collection tank assembly, remote operated quick connect-disconnect coupling and system using the same
WO1989006298A1 (en) * 1987-12-30 1989-07-13 Environment/One Corporation Narrow accessway sewage collection tank assembly, remote operated quick connect-disconnect coupling and system using the same
US5439180A (en) * 1993-05-11 1995-08-08 Environment/One Corporation Readily installed universal sewage grinder pump
WO1994026416A1 (en) * 1993-05-11 1994-11-24 Environment One Corporation Readily installed universal sewage grinder pump
US5562254A (en) * 1994-08-02 1996-10-08 Environment One Corp. Grinder pump station
US5752315A (en) * 1994-08-02 1998-05-19 Environment One Corporation Grinder pump station and method of manufacture thereof
US5816510A (en) * 1994-08-02 1998-10-06 Environment One Corporation Grinder pump station
US5553794A (en) * 1994-12-22 1996-09-10 Tarby Inc Sewage handling system
US6059208A (en) * 1997-09-11 2000-05-09 Interon Corporation Buried plastic sewage sump
US20120085688A1 (en) * 2009-06-23 2012-04-12 Zoeller Pump Company, Llc Grinder pump basin system
US9004381B2 (en) * 2009-06-23 2015-04-14 Zoeller Pump Company, Llc Grinder pump basin system

Also Published As

Publication number Publication date
FR2206283B1 (enExample) 1983-04-22
IT1003219B (it) 1976-06-10
FR2206283A1 (enExample) 1974-06-07

Similar Documents

Publication Publication Date Title
US4067663A (en) Sewage pump priming system
US4552512A (en) Standby water-powered basement sump pump
US8740576B2 (en) Pumping system for pumping liquid from a lower level to an operatively higher level
WO1998004833A1 (en) Self-priming type centrifugal pump
US5553794A (en) Sewage handling system
US3904131A (en) Pressure sewer system
US2477079A (en) Pump
US20090020163A1 (en) Siphon Breaker
CN206738219U (zh) 气泵密封水低压回水系统
US6588443B2 (en) Method of draining condensate and condensate drain device
CA2514706C (en) Pumping system
US1774234A (en) Sewage ejector
US4834621A (en) Air throttling valve for submerged pump system
CN205605443U (zh) 一种离心水泵自吸真空器
CN114482224A (zh) 一种一体化截流井装置和控制方法
JPS6231680Y2 (enExample)
JP3191102B2 (ja) 立軸ポンプ
JP3191104B2 (ja) 立軸ポンプ
CN2325568Y (zh) 潜水泵机械密封防砂装置
JPH0623756Y2 (ja) 立軸ポンプ
US1446903A (en) Gas and liquid pumping apparatus
US3302574A (en) Pressure responsive pump control
RU2020277C1 (ru) Насосная установка
US3138169A (en) Valve arrangement for pump
JP3007791B2 (ja) 液状物等流体の自動移送装置