US3429274A - Diaphragm pump,in particular for pumping viscous liquids - Google Patents

Diaphragm pump,in particular for pumping viscous liquids Download PDF

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Publication number
US3429274A
US3429274A US644653A US3429274DA US3429274A US 3429274 A US3429274 A US 3429274A US 644653 A US644653 A US 644653A US 3429274D A US3429274D A US 3429274DA US 3429274 A US3429274 A US 3429274A
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United States
Prior art keywords
diaphragm
housing
pump
valve
room
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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
US644653A
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English (en)
Inventor
Erling Ingvar Nilsson
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Akerlund and Rausing AB
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Akerlund and Rausing AB
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Publication date
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Publication of US3429274A publication Critical patent/US3429274A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/127—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring

Definitions

  • the present invention relates to a diaphragm pump, in particular for pumping viscous liquids.
  • An important purpose for which the pump is used is to pump printing inks to the inking devices in printing machines, in which case it functions as a circulation pump in the circuit between the ink vats of the inking devices and a storage container for the printing ink.
  • Other instances of purposes for which this pump is used are pumping of lacquers in lacquering machines and glue in laminating and gluing machines.
  • the diaphragm pump according to the invention has a pump housing with inlet and outlet valves for the passage of the liquid being pumped and a second housing connected with the pump housing along marginal portions between which there is mounted a diaphragm, one side of which borders on the pump housing chamber and the other side of which, together with the other housing defines a room which is adapted to be supplied with compressed air for operating the diaphragm, the said second housing being provided with valve means for bringing about variations in the air pressure prevailing in the room and acting on the diaphragm, thus causing its reciprocatng movements, and is characterized in that the valve means are mechanically and pneumatically guided by the reciprocating movements of the diaphragm and consist of a bore provided opposite the diaphragm in the second housing and being in communication with the atmosphere, as well as a valve body displaceable in the said bore and, in an end position, shutting the bore from the room in the second housing, the valve body being adapted to be moved to the shutting position under the action of the dia
  • FIG. 1 is an axial section of an embodiment of a diaphragm pump according to the invention
  • FIG. 2 is an axial section of part of another embodiment of the pump.
  • the diaphragm pump shown in the drawing has a pump housing 1 enclosing a chamber 2.
  • the housing 1 consists of a box-shaped portion 3 and an annular portion 4, which are detachably connected with each other by means of a bayonet catch 5 and mutually sealed by means of a gasket 6.
  • the box-shaped portion 3 is provided with diametrically opposite connecting pieces 7 and 8, into which hose fittings 9 and 10, respectively, are screwed.
  • a ring 11 and 12 Between an 3,429,274 Patented Feb. 25, 1969 interior annular shoulder in each connecting piece 7 and 8 and the inner end of the respective hose fitting 9 and 10 there is clamped a ring 11 and 12, respectively, which serves as a valve seat.
  • valve seat 11 and a ball 13 resting against it on the inside form an inlet valve for the liquid to be pumped and which is supplied through a hose (not shown) connected with the fitting 9, while the valve seat 12 and a ball 14 resting against it on the outside form an outlet valve for the liquid which is discharged through a hose (not shown) connected to the fitting 10.
  • a second housing 15, which defines a room 16 is connected with a portion 4 of the pump housing 1 by means of marginal or flange portions and bolts 17 passing through these, only one of which is shown in the drawing. Between these marginal or flange portions there is mounted a diaphragm 18, which consequently defines the chamber 2 in the pump housing 1 on one side and a room 16 in the housing 15 on the other side.
  • the diaphragm 18 may preferably be laminated and consists of a fabric reinforced neoprene-rubber partial diaphragm having a thickness of e.g. 2 mm. and provided on the side which faces the pump housing, and a fabric reinforced neoprenerubber partial member having a thickness of 0.5 mm. and provided on the opposite side.
  • a washer 19 On the pump housing side of the diaphragm 18 there is provided a washer 19 and on the opposite side a washer 20. These two washers are held tensioned centrally against the diaphragm by means of a bolt 21 inserted from the pump housing side and a nut 22 tensioned against the washer 20. Beneath the head of the bolt there is mounted a sealing gasket 23.
  • the washer 19 is provided with a seat for one end of a spring 24, which rests with its other end against a seat provided on the bottom of the box-shaped portion 3 of the housing 1.
  • the spring 24 is pretensioned and thus exerts a pressure on the diaphragm 18 in a direction away from the housing 15.
  • the room 16 in the housing 15 is adapted to be placed in connection with a source of compressed air through an aperture 25 in the wall of the housing at the bottom of an exterior threaded recess 26 for screwing a hose fitting (not shown) onto a hose conduit coming from the source of compressed air.
  • a hose fitting (not shown) onto a hose conduit coming from the source of compressed air.
  • a lateral aperture 28 through the housing from the said bore to the atmosphere.
  • valve member 29 which is provided with a come 30 intended to rest in sealing engagement with that end of the bushing which faces the room 16 when the valve member is completely inserted into the bushing.
  • a weak compression spring 31 is mounted between the bottom of the bore and the valve member 29 and thus tends to keep the cone 30 away from its seat.
  • the end surface of the valve member 29 which faces the room 16 is ground completely plane.
  • the valve body has a through axial passage 32, the opening of which on the said plane end surface may be kept tightly sealed by means of a fibre disk 33, which is kept pressed against the surface by the nut 22 when the diaphragm 18 is in the position shown in the drawing.
  • a follower member 35 which consists of a tubular body which is displaceably threaded onto a pin 36 mounted in the wall of the housing 15 and projecting freely into the bore 34.
  • the front end of the follower member 35 is kept pressed against the washer 20 on the diaphragm 18 by a spring 37, which is provided between the bottom of the bore 34 and a spring seat on the follower member.
  • the latter At a certain distance from its said forward end the latter has a shoulder 38 directed forward and intended to engage 3 with the edge of the fibre disk 33 in order to tilt it a little farther away from the end surface of the valve body 29 when the diaphragm '18 has moved so far to the left in the drawing as to permit the spring 37 to displace the follower member 35 through the required distance.
  • a ring 39 in a peripherally interior groove in the housing 15, said ring surrounding the nut 22 freely and having at the top (as seen in FIG. 1) at 40 a bulge in the direction of the fibre disk.
  • the pump described above functions as follows. It is assumed that the parts of the pump occupy the position shown in the drawing from the beginning.
  • the diaphragm 18 When compressed air enters the room 16, preferably at a pressure of 1.5 kp./cm. the diaphragm 18 is forced towards the left in FIG. 1.
  • the outlet for the compressed air through the aperture 28 is shut by the valve cone 30 while this takes place.
  • the spring 37 simultaneously displaces the follower means 35 towards the left.
  • the shoulder 38 of the said member strikes against the edge of the fibre disk 33 and tilts it in the manner described above, the compressed air may follow through the passage 32 into the space behind the valve member 29, thus equalizing the pressure difference acting on the valve member.
  • valve member 29 moves the fibre disk 33 along, but in consequence of the fact that the said disk strikes against the bulge 40 on the ring 39 it cannot lie sealingly against the end surface of the member 29 but is forced to occupy an inclined position in relation thereto.
  • the pump may be fixed, preferably by means of a threaded pin 41, in a corresponding opening in the lid of a liquid container.
  • the embodiment of the pump which is partly shown in FIG. 2 differs from the embodiment shown in FIG. 1 only with respect to the construction of the valve means.
  • the valve body 42 consists of a part provided with a cone 43 and of a part 44 having a larger outer diameter than the cone and being connected with the cone member by means of a nut 45.
  • the bushing 46 provided in the bore in the housing 15a has a portion with a relatively small inner diameter at its end which is adjacent the chamber 16a in the housing, against which portion the cone 43 is to rest when the valve body 42 is completely inserted into the bushing 46, and a portion of a larger inner diameter in which the valve body part 44 moves.
  • a diaphragm pump comprising a housing, a diaphragm fixedly mounted at its periphery in said housing and dividing the interior thereof into first and second rooms, valve controlled inlet and outlet means communicating with said first room forming a pump chamber, means for supplying pressure fluid to said second room to operate said diaphragm, and valve means controlling the discharge of pressure fluid from said second room in order to bring about variations in the air pressure prevailing in said second room and acting on the diaphragm, thus producing reciprocating movement thereof, said valve means having a valve body reciprocable between closed and open positions in a bore in said housing, opening in said second room opposite said diaphragm and communicating with the atmosphere, said valve body being adapted to be moved to said closed position by said diaphragm when moved towards said second room and to be retained in said closed position closing said bore to said second room, by fluid pressure in said second room, a shutting member controlling communication through a passage in said valve body between the ends thereof, a follower operatively related to said diaphragm

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Coating Apparatus (AREA)
US644653A 1966-06-08 1967-06-08 Diaphragm pump,in particular for pumping viscous liquids Expired - Lifetime US3429274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7822/66A SE316985B (no) 1966-06-08 1966-06-08

Publications (1)

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US3429274A true US3429274A (en) 1969-02-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
US644653A Expired - Lifetime US3429274A (en) 1966-06-08 1967-06-08 Diaphragm pump,in particular for pumping viscous liquids

Country Status (4)

Country Link
US (1) US3429274A (no)
DE (1) DE1653355C3 (no)
GB (1) GB1177235A (no)
SE (1) SE316985B (no)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750350A1 (de) * 1976-11-12 1978-05-18 Hesse Geb Westheimer Ruth Lea In erster linie fuer lebensrettungszwecke bestimmte trachealabsaugpumpe
US4149372A (en) * 1976-12-16 1979-04-17 United Technologies Corporation Fuel reclaiming system
US4199535A (en) * 1978-02-22 1980-04-22 Pierburg Gmbh & Co., Kg Diaphragm pump
US4350477A (en) * 1977-04-20 1982-09-21 Mazal Charles N Pneumatic pulsatile fluid pump
US4726528A (en) * 1985-11-08 1988-02-23 Gaiotto Impianti S.P.A. Pressure equalizer for use in feeders of ceramic enamels or paints for spray guns, particularly automatic spray guns installed on enamelling or painting robots
US4895499A (en) * 1986-09-22 1990-01-23 The Wooster Brush Company Outlet valve assembly for paint sprayer
US5281108A (en) * 1989-06-23 1994-01-25 Gerard Brooke Diaphragm pumps
US5362392A (en) * 1993-03-08 1994-11-08 Parker Hannifin Corporation Filter head with integral priming pump
US5409355A (en) * 1991-07-26 1995-04-25 Brooke; Gerard Diaphragm pump
US6328883B1 (en) 2000-05-31 2001-12-11 Parker-Hannifin Corporation Fuel filter assembly with priming pump
US20220341406A1 (en) * 2021-04-27 2022-10-27 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478958A1 (fr) * 1980-04-01 1981-10-02 Decoufle Dispositif d'alimentation en encre des appareils d'imprimerie pour machines a confectionner les cigarettes
ES2316289B1 (es) * 2007-07-23 2010-01-26 Enviroxi, Sl Bomba para transporte de fluidos y sistema de bombeo.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641107A (en) * 1948-04-20 1953-06-09 Trico Products Corp Accessory system
US2679209A (en) * 1949-09-01 1954-05-25 Arthur Bachert Pumping apparatus
US3338171A (en) * 1965-09-15 1967-08-29 Du Pont Pneumatically operable diaphragm pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641107A (en) * 1948-04-20 1953-06-09 Trico Products Corp Accessory system
US2679209A (en) * 1949-09-01 1954-05-25 Arthur Bachert Pumping apparatus
US3338171A (en) * 1965-09-15 1967-08-29 Du Pont Pneumatically operable diaphragm pumps

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750350A1 (de) * 1976-11-12 1978-05-18 Hesse Geb Westheimer Ruth Lea In erster linie fuer lebensrettungszwecke bestimmte trachealabsaugpumpe
FR2370480A1 (fr) * 1976-11-12 1978-06-09 Hesse Ruth Lea Pompe d'aspiration tracheale
US4319570A (en) * 1976-11-12 1982-03-16 Ruth Lea Hesse Tracheal suction pump designed primarily for aspiration purposes
DK154397B (da) * 1976-11-12 1988-11-14 Hesse Ruth Lea Trachealsugepumpe
US4149372A (en) * 1976-12-16 1979-04-17 United Technologies Corporation Fuel reclaiming system
US4350477A (en) * 1977-04-20 1982-09-21 Mazal Charles N Pneumatic pulsatile fluid pump
US4199535A (en) * 1978-02-22 1980-04-22 Pierburg Gmbh & Co., Kg Diaphragm pump
US4726528A (en) * 1985-11-08 1988-02-23 Gaiotto Impianti S.P.A. Pressure equalizer for use in feeders of ceramic enamels or paints for spray guns, particularly automatic spray guns installed on enamelling or painting robots
US4895499A (en) * 1986-09-22 1990-01-23 The Wooster Brush Company Outlet valve assembly for paint sprayer
US5281108A (en) * 1989-06-23 1994-01-25 Gerard Brooke Diaphragm pumps
US5409355A (en) * 1991-07-26 1995-04-25 Brooke; Gerard Diaphragm pump
US5362392A (en) * 1993-03-08 1994-11-08 Parker Hannifin Corporation Filter head with integral priming pump
US6328883B1 (en) 2000-05-31 2001-12-11 Parker-Hannifin Corporation Fuel filter assembly with priming pump
US20220341406A1 (en) * 2021-04-27 2022-10-27 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators
US11549523B2 (en) * 2021-04-27 2023-01-10 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators
US11828303B2 (en) 2021-04-27 2023-11-28 Blacoh Fluid Controls, Inc. Automatic fluid pump inlet stabilizers and vacuum regulators

Also Published As

Publication number Publication date
SE316985B (no) 1969-11-03
DE1653355B2 (de) 1977-11-17
DE1653355C3 (de) 1978-07-06
GB1177235A (en) 1970-01-07
DE1653355A1 (de) 1971-05-06

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