USRE39813E1 - Vacuum-assisted pump - Google Patents
Vacuum-assisted pump Download PDFInfo
- Publication number
- USRE39813E1 USRE39813E1 US10/962,257 US96225704A USRE39813E US RE39813 E1 USRE39813 E1 US RE39813E1 US 96225704 A US96225704 A US 96225704A US RE39813 E USRE39813 E US RE39813E
- Authority
- US
- United States
- Prior art keywords
- impeller
- pump
- self
- vacuum pump
- impeller shaft
- 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
Links
- 230000037452 priming Effects 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims 2
- 239000007788 liquid Substances 0.000 abstract description 15
- 238000005461 lubrication Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000004519 grease Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/043—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump being hand operated or of the reciprocating type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/044—Means for rendering the priming pump inoperative
- F04D9/045—Means for rendering the priming pump inoperative the means being liquid level sensors
- F04D9/046—Means for rendering the priming pump inoperative the means being liquid level sensors the means being floats
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2931—Diverse fluid containing pressure systems
- Y10T137/3003—Fluid separating traps or vents
- Y10T137/3084—Discriminating outlet for gas
- Y10T137/309—Fluid sensing valve
- Y10T137/3099—Float responsive
Definitions
- This invention relates to centrifugal pumps and more particularly to centrifugal pumps with vacuum-assisted self-priming.
- Centrifugal pumps are the most common pumps for moving liquids from place to place and are used in irrigation, domestic water systems, sewage handling and many other applications.
- Liquid is urged through the pump by a spinning disk-shaped impeller positioned inside an annular volute.
- the volute has an eye at the center where water enters the pump and is directed into the center of the impeller.
- the rotation of the impeller flings the liquid outward to the perimeter of the impeller where it is collected for tangential discharge. As the liquid is driven outward, a vacuum is created at the eye, which tends to draw more fluid into the pump.
- centrifugal pumps One of the principle limitations on the use of centrifugal pumps is their limited ability to draw fluid for priming when starting from an air-filled or dry condition.
- the impeller which is designed to pump liquids, often cannot generate sufficient vacuum when operating in air to draw liquid up to the pump when the standing level of the liquid is below the eye of the pump. Once the liquid reaches the eye, the outward motion of the liquid away from the eye creates the vacuum necessary to draw a continuing stream of liquid. However, until liquid reaches the impeller, very little draw is generated.
- FIG. 1 is a side elevational view of a pump according to the present invention.
- FIG. 2 is an enlarged view of a portion of the pump of FIG. 1 .
- FIG. 3 is a side elevational view of a vacuum pump assembly according to the present invention.
- FIG. 4 is a partial cross sectional view of part of a vacuum pump assembly taken along lines 4 — 4 in FIG. 3 .
- FIG. 5 is a partial cross-sectional view of a float valve assembly according to the present invention.
- a pump according to the present invention is shown generally at 10 in FIG. 1 .
- Pump 10 includes a centrifugal section 12 , a float valve assembly 14 and a vacuum pump assembly 16 .
- the centrifugal section includes an intake 18 leading to an eye 20 of a volute 22 .
- the volute has an output 24 to which is connected a check valve 26 to prevent reverse flow when the pump is priming or idle.
- An impeller 28 is mounted inside the volute on a shaft 30 .
- the shaft is supported by a bearing housing 32 , which is mounted on a pedestal 34 .
- a bracket or bell housing 36 connects the bearing frame to a motor (not shown).
- a combustion motor is often used for dewatering applications because it eliminates the need for electrical power, although an electric motor may be used as well in which case the bell housing is not required.
- Shaft 30 has a drive end 38 , which is driven by the motor.
- the portion of pump 10 described above is a standard centrifugal pump, such as a Cornell Pump Company Model No. 14NHGH-F18DB. It should be noted that this pump has a scaling system that allows the pump to safely run dry for extended periods of time. This system includes an oil reservoir to provide cooling. While the centrifugal pump will efficiently pump water or other liquids, it will not draw significant vacuum when operated dry. Priming is accomplished with the previously mentioned vacuum pump assembly and regulated by the float valve.
- vacuum pump assembly 16 is mounted to the top of bearing housing 32 on a mounting plate 50 .
- a housing or base 52 is bolted to the plate and supports a shaft 54 on bearings 56 . See FIGS. 2 and 3 .
- Base 52 also contains an oil reservoir 58 .
- Shaft 54 projects through one end of base 52 to support a pulley 60 .
- a drive linkage in the form of a belt 62 connects pulley 60 to a pulley 64 mounted on drive end 38 of shaft 30 , passing through bell housing 36 .
- a guard 65 covers the pulley and belt.
- Shaft 54 includes an eccentric section 66 to which is mounted a connecting rod 68 . See FIG. 4 .
- Connecting rod 68 is tied to a slider 70 by a pin 72 .
- An oil delivery system in the form of two oil flingers 74 attached to shaft 54 throws oil in the oil reservoir up onto the connecting rod, pin and slider to insure adequate lubrication.
- the flingers are rigid and similar to a thumb screw screwed into shaft 54 .
- the flingers could also take many other configurations, such as flexible strips or a partially submerged disk which could likewise flip oil onto components above the oil level.
- some type of pumping system could be provided to convey oil onto the moving components that are not in contact with the oil bath.
- Slider 70 extends upward through a sleeve section 76 that is bolted to the top of base 52 .
- Sleeve 76 includes two seals 78 and a bushing 80 to guide slider 70 .
- a grease fitting 82 allows introduction of grease into a cavity 84 between the seals.
- a diaphragm housing 86 is mounted to the top of sleeve 76 and encloses a pump chamber that houses a diaphragm 88 .
- Diaphragm 88 is mounted to the top of slider 70 and is driven up and down with the slider when shaft 54 rotates.
- air is moved by operation of three check valves.
- As the diaphragm moves up in the chamber air is drawn through an intake check valve 90 positioned in an intake port 92 .
- T he check valve includes a disk-shaped rubber seal 94 , which is positioned over a number of holes 96 in the chamber in the intake port. As the diaphragm rises and generates a vacuum, the seal is lifted and air is drawn into the lower portion of the chamber.
- Output check valve 100 is similar to intake check valve 90 and includes a seal 104 which lifts to release air as positive pressure is generated in the upper portion of the pump chamber.
- the output check valve is centered over the diaphragm to maximum flow rate through the output port.
- Vacuum pump assembly 16 is connected by a hose 116 to an output port 118 on float valve assembly 14 .
- the output port is mounted atop a valve housing or float box 120 , an upper portion 122 of which is cylindrical and a lower portion 124 of which is frustro-conical in shape.
- the float box is mounted on the intake of the centrifugal pump. Holes 125 allow water to rise into the float box from the intake.
- a float 126 When there is no water in the float box, a float 126 hangs freely.
- the float is connected through linkage assembly 128 to a valve stem 130 .
- a seal 132 consisting of an o-ring 134 supported by a small flange 136 , is mounted on the valve stem and positioned away from a valve seat 137 formed in the float box when the float is hanging freely. This configuration allows air to be drawn through the valve seat and into the output port for subsequent delivery to the vacuum pump.
- the upper portion of stem 130 is supported in a guide 138 formed in output port 118 . This guide allows the stem to move up and down freely, but restricts lateral movement.
- valve tends be held closed by the vacuum that builds quickly after the valve closes because of the cross-sectional area of the seal and stem.
- a hysteresis effect is created whereby the valve will not open until the water drops well below the level at which the valve first closed. Similarly, after opening, the valve will not close again until the water rises well above the level where the valve opened.
- the amount of hysteresis can be established by balancing the cross-sectional area of the valve against the size and density of the ball. The hysteresis is important because, as the pump is being primed, water flow is turbulent and subject to surging which would otherwise cause the valve to repeatedly open and close.
- the small area of holes 125 also helps to reduce fluctuations in the level of water in the valve housing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (26)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/962,257 USRE39813E1 (en) | 1999-02-26 | 2004-10-08 | Vacuum-assisted pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/258,833 US6409478B1 (en) | 1999-02-26 | 1999-02-26 | Vacuum-assisted pump |
US10/962,257 USRE39813E1 (en) | 1999-02-26 | 2004-10-08 | Vacuum-assisted pump |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/258,833 Reissue US6409478B1 (en) | 1999-02-26 | 1999-02-26 | Vacuum-assisted pump |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE39813E1 true USRE39813E1 (en) | 2007-09-04 |
Family
ID=22982322
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/258,833 Ceased US6409478B1 (en) | 1999-02-26 | 1999-02-26 | Vacuum-assisted pump |
US10/131,419 Expired - Lifetime US6575706B2 (en) | 1999-02-26 | 2002-04-22 | Vacuum-assisted pump |
US10/147,144 Expired - Lifetime US6616427B2 (en) | 1999-02-26 | 2002-05-15 | Vacuum-assisted pump |
US10/962,257 Expired - Lifetime USRE39813E1 (en) | 1999-02-26 | 2004-10-08 | Vacuum-assisted pump |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/258,833 Ceased US6409478B1 (en) | 1999-02-26 | 1999-02-26 | Vacuum-assisted pump |
US10/131,419 Expired - Lifetime US6575706B2 (en) | 1999-02-26 | 2002-04-22 | Vacuum-assisted pump |
US10/147,144 Expired - Lifetime US6616427B2 (en) | 1999-02-26 | 2002-05-15 | Vacuum-assisted pump |
Country Status (1)
Country | Link |
---|---|
US (4) | US6409478B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10995741B2 (en) | 2015-08-04 | 2021-05-04 | Altop Patents B.V. | Pump having a suction space surrounded by a delivery space |
US11560902B2 (en) | 2019-01-25 | 2023-01-24 | Pentair Flow Technologies, Llc | Self-priming assembly for use in a multi-stage pump |
Families Citing this family (36)
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---|---|---|---|---|
US6315524B1 (en) * | 1999-03-22 | 2001-11-13 | David Muhs | Pump system with vacuum source |
US6692234B2 (en) | 1999-03-22 | 2004-02-17 | Water Management Systems | Pump system with vacuum source |
US6405748B1 (en) | 1999-03-22 | 2002-06-18 | David Muhs | Trailer and fuel tank assembly |
ATE356936T1 (en) * | 2001-08-11 | 2007-04-15 | Pioneer Pump Inc | SELF-PRIMING PUMP UNIT |
GB2404695B (en) * | 2003-08-04 | 2006-05-31 | Itt Mfg Enterprises Inc | Self-priming centrifugal pump |
US7334600B2 (en) * | 2003-08-22 | 2008-02-26 | The Gorman-Rupp Company | Priming apparatus for a centrifugal pump |
US20050191185A1 (en) * | 2003-12-31 | 2005-09-01 | Jones Garr M. | System and method for removing gases from liquid transport systems |
CA2664761C (en) * | 2006-01-12 | 2014-04-01 | The Gorman-Rupp Company | Air release valve |
DE102006016199A1 (en) * | 2006-04-06 | 2007-10-11 | Alfa Laval Kolding A/S | Self-venting centrifugal pump |
US20080159889A1 (en) | 2006-08-11 | 2008-07-03 | Mark Exner | Flood water removal system |
JP5378672B2 (en) * | 2006-11-10 | 2013-12-25 | 正 宗 王 | Inflatable bed with built-in electric air pump unit for inflating mattress assembly |
US7878768B2 (en) | 2007-01-19 | 2011-02-01 | David Muhs | Vacuum pump with wear adjustment |
US20110318196A1 (en) * | 2008-03-10 | 2011-12-29 | Alberts Iii John J | Integrated pump priming system |
US8998586B2 (en) * | 2009-08-24 | 2015-04-07 | David Muhs | Self priming pump assembly with a direct drive vacuum pump |
CN101858356B (en) | 2010-05-21 | 2014-09-10 | 先驱塑胶电子(惠州)有限公司 | Inflation and deflation control device |
US9016290B2 (en) | 2011-02-24 | 2015-04-28 | Joseph E. Kovarik | Apparatus for removing a layer of sediment which has settled on the bottom of a pond |
CN102162458B (en) * | 2011-06-02 | 2012-11-28 | 长春泵业有限公司 | A gas fluid mixture self-priming pump |
US9175686B2 (en) * | 2011-09-02 | 2015-11-03 | Waterous Company | Priming valve system for pre-priming centrifugal pump intakes |
CN102954030B (en) * | 2012-10-03 | 2014-11-19 | 车晋绥 | Rubber pump with gland pump |
NL2012135C2 (en) * | 2014-01-24 | 2015-07-29 | Rio Boxx Holding B V | SELF-STARTING SYSTEM WITH VALVE FOR A CENTRIFUGAL PUMP. |
CN103850944A (en) * | 2014-02-26 | 2014-06-11 | 崔正军 | Dual-belt self-sucking pump |
CN204326194U (en) * | 2014-03-31 | 2015-05-13 | 李飞宇 | A kind of water intaking valve shortened of arguing for the sake of arguing |
CN104196736B (en) * | 2014-08-23 | 2016-04-13 | 王亚泉 | High efficiency smart self-priming pump control wiring structure |
CN104279164A (en) * | 2014-10-13 | 2015-01-14 | 辽宁格瑞特泵业有限公司 | Drive clutch self-priming device |
KR101580777B1 (en) * | 2014-10-17 | 2015-12-30 | 주식회사 일성 | A vacuum self-priming pump |
CN107100852B (en) * | 2017-05-22 | 2023-10-31 | 福州海霖机电有限公司 | Movable quick vacuum self-priming pump |
KR102020394B1 (en) * | 2018-02-08 | 2019-09-10 | 이근섭 | Extension system of floor space for trucks |
CN108468647A (en) * | 2018-06-08 | 2018-08-31 | 安徽阿莫斯泵业有限公司 | Vacuum aided self priming pump |
CN108612656A (en) * | 2018-06-08 | 2018-10-02 | 安徽阿莫斯泵业有限公司 | A kind of parasitic type auxiliary self-priming vacuum pump |
CN109098978B (en) * | 2018-06-13 | 2020-02-11 | 上海尧禹智能泵阀有限公司 | Idle-resistant liquid-land dual-purpose integrated modular temperature-resistant corrosion-resistant self-priming pump |
CN113167060A (en) * | 2018-10-10 | 2021-07-23 | 流体处理有限责任公司 | System condition detection using inlet pressure |
WO2020118237A1 (en) | 2018-12-06 | 2020-06-11 | Orteq Energy Technologies, Llc | Portable, dual-chambered, silo tank fueling system |
CN110397603B (en) * | 2019-08-03 | 2020-09-15 | 绍兴柯桥春生水务科技有限公司 | Water pump |
CN110939575A (en) * | 2019-12-02 | 2020-03-31 | 厚力德机器(杭州)有限公司 | Urban septic tank treatment conveying device |
CN111946627B (en) * | 2020-08-29 | 2021-09-21 | 浙江乐蛙泵业有限公司 | Centrifugal water pump |
MX2023004123A (en) * | 2022-04-11 | 2023-10-12 | Cornell Pump Company LLC | Vacuum priming system for close-coupled pumps. |
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US1201594A (en) * | 1915-08-09 | 1916-10-17 | Edward W King | Mechanism for priming and operating centrifugal pumps. |
US1475994A (en) * | 1923-02-16 | 1923-12-04 | Seagrave Company | Means for priming pumps |
US1840257A (en) * | 1930-01-02 | 1932-01-05 | Barnes Mfg Company | Self-priming pumping apparatus |
US1910775A (en) * | 1930-09-13 | 1933-05-23 | Jaeger Machine Co | Means for priming liquid pumps |
US2192442A (en) * | 1934-11-05 | 1940-03-05 | Aviat Mfg Corp | Internal combustion engine |
US2845875A (en) * | 1956-03-29 | 1958-08-05 | Thomas H Corbett | Pumps |
US4249865A (en) * | 1979-06-25 | 1981-02-10 | Sloan Albert H | Control means for preventing water overflow into vacuum type priming pump |
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US2675762A (en) * | 1954-04-20 | Share | ||
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-
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- 1999-02-26 US US09/258,833 patent/US6409478B1/en not_active Ceased
-
2002
- 2002-04-22 US US10/131,419 patent/US6575706B2/en not_active Expired - Lifetime
- 2002-05-15 US US10/147,144 patent/US6616427B2/en not_active Expired - Lifetime
-
2004
- 2004-10-08 US US10/962,257 patent/USRE39813E1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1201594A (en) * | 1915-08-09 | 1916-10-17 | Edward W King | Mechanism for priming and operating centrifugal pumps. |
US1475994A (en) * | 1923-02-16 | 1923-12-04 | Seagrave Company | Means for priming pumps |
US1840257A (en) * | 1930-01-02 | 1932-01-05 | Barnes Mfg Company | Self-priming pumping apparatus |
US1910775A (en) * | 1930-09-13 | 1933-05-23 | Jaeger Machine Co | Means for priming liquid pumps |
US2192442A (en) * | 1934-11-05 | 1940-03-05 | Aviat Mfg Corp | Internal combustion engine |
US2845875A (en) * | 1956-03-29 | 1958-08-05 | Thomas H Corbett | Pumps |
US4249865A (en) * | 1979-06-25 | 1981-02-10 | Sloan Albert H | Control means for preventing water overflow into vacuum type priming pump |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10995741B2 (en) | 2015-08-04 | 2021-05-04 | Altop Patents B.V. | Pump having a suction space surrounded by a delivery space |
US11560902B2 (en) | 2019-01-25 | 2023-01-24 | Pentair Flow Technologies, Llc | Self-priming assembly for use in a multi-stage pump |
Also Published As
Publication number | Publication date |
---|---|
US20020114707A1 (en) | 2002-08-22 |
US20020168270A1 (en) | 2002-11-14 |
US6616427B2 (en) | 2003-09-09 |
US6575706B2 (en) | 2003-06-10 |
US6409478B1 (en) | 2002-06-25 |
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