US3233553A - Pumps - Google Patents

Pumps Download PDF

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Publication number
US3233553A
US3233553A US332518A US33251863A US3233553A US 3233553 A US3233553 A US 3233553A US 332518 A US332518 A US 332518A US 33251863 A US33251863 A US 33251863A US 3233553 A US3233553 A US 3233553A
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US
United States
Prior art keywords
shaft
plates
sheath
pump body
helix
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
US332518A
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English (en)
Inventor
Chanton Edmond
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.)
Societe Generale de Mecanique et de Metallurgie
Original Assignee
Societe Generale de Mecanique et de Metallurgie
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 Societe Generale de Mecanique et de Metallurgie filed Critical Societe Generale de Mecanique et de Metallurgie
Application granted granted Critical
Publication of US3233553A publication Critical patent/US3233553A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
    • 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

  • the present invention relates to pumps for a fluid either liquid or gaseous.
  • the invention relates to a pump comprising the following elements: a body having a cylindrical inner surface the respective axial ends of which are connected respectively to a suction orifice and to a delivery orifice, a shaft the middle line of which is of helical shape housed in said body, the length of this shaft being equal to at least one pitch of the helix, the cross section of this shaft being constant along its length and having the same total width 1 in all directions, the two ends of said shaft being joined to journals disposed along the axis of said helix; a plurality of identical transverse plates provided in their central portions with apertures having two rigid edges parallel to each other and perpendicular to a direction D, the distance between said edges being equal to I, said plates having their central apertures mounted on said shaft and being juxtaposed to one another; a flexible and fluidtight tubular sheath surrounding the juxtaposition of plates and forming therewith a deformable element fitting with a sliding fit in the body, the mean line of this element being sinuous but plane and every cross Section thereof
  • the present invention consists in giving said plates a circular external outline and in providing each of them in eccentric position with at least one slot elongated in direction D, through which passes, with some play in said direction D but without play in the direction perpendicular to D, a rectilinear guiding rod rigid with the body and extending parallelly to the generatrices thereof.
  • the function of the guiding rods is to prevent the plates from rotating about their centers when the helicoidal driving shaft rotates.
  • Another advantage is that, on the one hand, due to this elimination of torsional stresses applied to the sheath and, on the other hand, due to the shape of revolution thereof, it is possible and easy to constitute it of two superposed envelopes, the external one resisting to the fluid to be pumped and the internal one resisting to the lubricant provided for the bearings and the plates.
  • FIG. 1 is a longitudinal section on the line II of FIG. 2 of a pump made according to the present invention
  • FIG. 2 is a longitudinal section on the line II-II of FIG. 1;
  • FIG. 3 is a part cross section on the line HIII1 of FIG. 1;
  • FIG. 4 shows, similarly to FIG. 3, the same pump for another angular position of its driving element
  • FIG. 5 is a longitudinal sectional view on the line V-V of FIG. 6 of a preferred embodiment of the pump according to the present invention.
  • FIG. 6 is a transverse section-a1 view on the line VI-Vl of FIG. 5;
  • FIG. 7 is a cross section of a shaft adapted to be used in pumps according to the present invention.
  • the two above mentioned surfaces are chosen in such manner as to be tangent to each other along, on the one hand, the crests of the undulations of the undulated surface and, on the other hand, at least one flat sinuous line in each of the two planes, parallel to said middle line, tangent to said two surfaces.
  • the working portion of the deformable element is arranged in such rnanner that each of its transverse sections can undergo, without deformation, translatory rectilinear reciprocating sliding movements in a direction D, independently of the adjacent cross sections of said element, said slid-ing movements being guided by two opposed flat bearing surfaces of the body in which the deformable element is fitted, every cross section being designed in such manner as to apply in a fluidtight manner, at every end of its stroke, against the corresponding portion of said rigid surface, one of the two portions of its periphery which are joined to each other along said flat bearing surfaces, and the transverse sliding displacement of every cross section are controlled in such manner that each of them is slightly offset transversely with respect to the adjacent ones, and that the juxtaposition of these cross sections has an undulated or sinuous surface.
  • every cross section of the deformable element is provided with an aperture including two rigid bearing elements facing each other (considered in direction D), a shaft of helical or substantially helical mean line being engaged in said apertures so that every cross section of said shaft is permanently tangent to the two rigid bearing sides of the corresponding aperture,
  • the rigid pump body comprises a hollow cylinder 1 the inner cross section of which is in the form of two half circles (FIG. 3) of diameter a joined together by two straight line portions parallel to direction D and of a length 0.
  • This cylinder 1 is connected at its ends, respectively with two chambers 2 and 3 in communication with connections 4 and 5 for the suction and delivery pipes.
  • the deformable element having an undulated surface consists of the juxtaposition of thin plates 6 of circular outline (the thickness of said plates being for instance 1 mm.).
  • the element constituted by the whole of said plates is fitted in a flexible and fluidtight sheath 7 the outer diameter of which is equal to a.
  • Each of the plates 6 is provided in its central portion with a rectangular aperture 3 the small sides of which are parallel to D.
  • Each of the plates further comprises two slots 9 parallel to D and disposed symmetrically to each other with respect to aperture 8.
  • a shaft 1% extends transversely to said plates 6, through the aperture 8 thereof.
  • the cross section of this shaft is a circle the diameter of which is equal to the length l of the small sides of every rectangular aperture 3.
  • the mean line of this shaft, or to be more accurate, of the working portion of this shaft is a portion of a helix hav ing a diameter equal to c and a pitch equal to p.
  • the length of this shaft portion is at least equal to p.
  • the ends of said helical portion of the shaft may be gradually joined to the axis of the helix, as shown by FIG.
  • sheath 7 may be fixed on the outer cylindrical surfaces 16 rigid with bearing surfaces 12, by means of annular fixation means 14.
  • deformable structure 67 has a sinuous shape and the mean line thereof is flat and sinuous with an amplitude of 0/2.
  • the system consisting of the whole of plates 6 and sheath 7 in which they are mounted remains tangent to the two flat surface portions of easing 1 which are parallel to slots 9 (and which are horizontal and designated by reference numeral 17 in FIGS. 1 and 3), and the crests 19 of the wavy structure 6-7 are tangent to the curved surfaces of cylinder 1 (FIGS. 2 and 4).
  • closed spaces 18 of a volume equal to /2 a.c.p. are created between sheath 7 and cylinder 1.
  • FIGS. 3 and 4 show the respective positions occupied by a plate 6 for two angular positions of shaft 10 at 90 to each other.
  • the length of the active portion of the device is at least equal to one pitch of the helix every space 18 is separated from the upstream chamber 2 before being placed .in communication with the downstream chamber 3. Therefore fluidtightness is ensured between these chambers, so that packing joints are unnecessary.
  • the pump works for both directions of rotation of shaft When the direction of rotation of the shaft is reversed the direction of flow of the fluid is also reversed.
  • FIGS. 5 and 6 The preferred embodiment of the invention illustrated by FIGS. 5 and 6 includes the elements designated by reference numerals 1 to 13 inclusive and also guiding rods 15 and spaces 13. It further includes the following features.
  • the contacting surfaces of these elements are increased by providing rods 15 with two flat bearing surfaces 15 parallel to direction D.
  • These fiat portions may be connected together by curved surfaces or they may consist of the faces of a drawn element having a rectangular or square cross section.
  • the plates are made of a material having a very good coefiicient of friction, in particular of a phenol resin reinforced with cotton and loaded with colloidal graphite, such as known under the trademark name of Celoron.
  • this sheath is made in the form of a moulded resilient bag including a central portion in the form of a tube of revolution, and two end portions, each in the form of a frusturn of a cone.
  • One of said end portions is convergent toward the end of said portion whereas, on the contrary, the other end portion is divergent.
  • the initial diameter of the tubular portion is smaller than the diameter of plate a so that, when said plates are introduced into the bag, they stretch it resiliently, thus eliminating any risk of play.
  • Rods and shaft 1d are first mounted in one of the bearings 12. Then plates 6 are stacked on these elements and the other bearing 12 is secured. The composite structure thus formed is inserted into bag 7 though the flaring end tiereof, whereby said bag is expended. At the end of this operation, the two end portions (each in the form of a frustum of a cone) are elastically applied against corresponding frusto-conical seats complementary of the respective bearings 12. In order to ensure perfect fluidtightness, the annular edges forming the ends of bag '7 (one 7 on the right and the other 7 on the left) are applied against corresponding surfaces or bearings 12, for instance by screwing of external rods 45 secured to the axial ends of the pump body.
  • every chamber 2 or 3 is moulded integral with the corresponding connection 4 or 5 and forms an independent piece which is axially applied against hollow cylinder 1 through the above mentioned rods 45, with the interposition of toroidal packing joints 46.
  • Sheath 7 4 mm. thick, this sheath consisting of two layers superimposed on each other, one on the inside being relatively thick and made of an elastomer capable of resisting the action of the lubricating oils that are used and the other on the outside, thinner, inert with respect to the liquid that is pumped and consisting for instance of chlorosulfonated polyethylene known under the trademark name of Hypalon which substance might be replaced by the copolymer of fluorovinylidene and hexafluoropropylene designated by the trademark name of Viton, by polytrifluoromonochloroethylene or even by polytetrafluoroethylene, which is sufilciently resilient under the small thickness that is considered:
  • Inner diameter of the tubular portion of sheath 7 62 min. before mounting and 65 mm. after mounting;
  • Plates 6 made of the reinforced phenol resin designated by the trademark name of Celoron having a thickness of 1 mm. and a diameter of 75 mm.;
  • Shaft made of nitrided steel having a diameter of 30 mm. and a useful length of 250 mm. (only 200 mm. of which correspond to a true helix, the remainder corresponding to the portions where said shaft is joined to the journals);
  • Pitch of the helix 100 mm., for a diameter of said helix equal to 6 mm.;
  • Theoretical output 2,700 liters per hour
  • the cross section of the helical shaft while remaining constant along this shaft and having the same total Width in all dimensions, might be noncircular; for instance it might have the shape of the Trezel eccentric cam shown at 4-7 in FIG. 7 the outline of this cam may be easily constructed by means of circular arcs from an equilateral triangle ABC having one of its apexes on the rotation shaft.
  • the number of pitches of the active portion of the shaft might be greater than 1 or 2, every shaft corresponding to a pumping stage.
  • the pitch of the helix would be variable along the shaft.
  • the inner cylindrical surface of the pump body instead of being integral with this body, might consist of a lining secured in said body.
  • Said surface instead of being hard, might be semir-igid, for instance made of hard rubber so as to improve fluidtightness of the spaces that are formed.
  • a pump which comprises, in combination, a pump body provided with a cavity having a cylindrical inner surface and respective suction and delivery orifices provided at the ends of said pump body respectively, said inner surface consisting of two half circular cylindrical portions of the same diameter disposed opposite each other, with their concavities turned touvard each other and joined together by two parallel flat portions, a shaft having its mean line in the form of a helix disposed in said body coaxially therewith, to length of this shaft being at least equal to the pitch of said helix, the cross section of this shaft being the same over the length of said shaft and having the same width in all directions, said shaft including, at its respective ends, cylindrical trunnions journalled in said body coaxially therewith, a multiplicity of adjacent plates transverse to the axis of said helix, each of said plates being provided with a central aperture having two longer sides parallel to each other and perpendicular to the direction of the flat portions of the pump body inner surface, said two sides being at a distance from each other equal to the above
  • a pump according to claim 1 wherein the guiding rod has two flat surfaces parallel to said direction, against which surfaces the edges of said slots parallel to said direction are slidable.
  • tubular sheath comprises two layers superimposed on each other, that intended to come into contact with the fluid to be pumped being made of a material especially resistant with respect to this fluid.
  • a pump according to claim 1 wherein said sheath is in the form of a moulded resilient b ag stretched by the plates packed therein one end of said bag flaring out whereas the other one is slightly retracted.
  • a pump according to claim 1 wherein the mean line of the shaft is a variable pitch helix.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Laminated Bodies (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US332518A 1962-12-28 1963-12-23 Pumps Expired - Lifetime US3233553A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR920121A FR1351597A (fr) 1962-12-28 1962-12-28 Perfectionnements apportés aux pompes

Publications (1)

Publication Number Publication Date
US3233553A true US3233553A (en) 1966-02-08

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ID=8793840

Family Applications (1)

Application Number Title Priority Date Filing Date
US332518A Expired - Lifetime US3233553A (en) 1962-12-28 1963-12-23 Pumps

Country Status (5)

Country Link
US (1) US3233553A (fr)
DE (1) DE1553186A1 (fr)
FR (1) FR1351597A (fr)
GB (1) GB1047769A (fr)
LU (1) LU45072A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340817A (en) * 1965-10-18 1967-09-12 Gustave W Kemnitz Pump
US3981633A (en) * 1974-06-25 1976-09-21 Ab Ljungmans Verkstader Pump
US4482347A (en) * 1982-08-12 1984-11-13 American Hospital Supply Corporation Peristaltic fluid-pumping apparatus
US4493706A (en) * 1982-08-12 1985-01-15 American Hospital Supply Corporation Linear peristaltic pumping apparatus and disposable casette therefor
US4558991A (en) * 1985-01-10 1985-12-17 Barr Robert A Wave pump assembly
DE3833833A1 (de) * 1988-10-05 1990-04-12 Kernforschungsanlage Juelich Pumpe
WO1996007827A1 (fr) * 1994-09-06 1996-03-14 Metameric Limited Pompe peristaltique
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US5826979A (en) * 1996-08-26 1998-10-27 Foss; Milton K. Waste material processing apparatus and method
US6234773B1 (en) 1994-12-06 2001-05-22 B-Braun Medical, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US6293762B1 (en) 1999-04-22 2001-09-25 Hormoz Farkhan Methods for sealing a tire and for introducing liquid into a tire
JP2006348900A (ja) * 2005-06-20 2006-12-28 Japan Servo Co Ltd チューブポンプ
US20070196222A1 (en) * 2004-07-28 2007-08-23 Otto Bock Healthcare Ip Gmbh & Co. Kg Pump comprising a moving wall and use of a pump of this type
DE202009001865U1 (de) * 2009-02-11 2010-07-22 Krauss, Gunter Pumpe, insbesondere Schlauchpumpe
US10232111B2 (en) 2013-12-31 2019-03-19 Abbvie Inc. Pump, motor and assembly for beneficial agent delivery

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712121A1 (de) * 1977-03-19 1978-09-28 Streicher Foerdertech Exzenterschneckenpumpe
EP0184938B1 (fr) * 1984-12-12 1990-03-28 Robert A. Barr Assemblage de pompe ondulatoire
DE4313442A1 (de) * 1993-04-24 1994-10-27 Resch Maschinen Und Geraetebau Fluidpumpe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE637586C (de) * 1934-12-08 1939-06-15 Matthias Rehse Doppeltwirkende ventillose Membranpumpe, insbesondere Tiefbrunnenpumpe
US2752860A (en) * 1953-02-25 1956-07-03 Du Pont Pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE637586C (de) * 1934-12-08 1939-06-15 Matthias Rehse Doppeltwirkende ventillose Membranpumpe, insbesondere Tiefbrunnenpumpe
US2752860A (en) * 1953-02-25 1956-07-03 Du Pont Pump

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340817A (en) * 1965-10-18 1967-09-12 Gustave W Kemnitz Pump
US3981633A (en) * 1974-06-25 1976-09-21 Ab Ljungmans Verkstader Pump
US4482347A (en) * 1982-08-12 1984-11-13 American Hospital Supply Corporation Peristaltic fluid-pumping apparatus
US4493706A (en) * 1982-08-12 1985-01-15 American Hospital Supply Corporation Linear peristaltic pumping apparatus and disposable casette therefor
US4558991A (en) * 1985-01-10 1985-12-17 Barr Robert A Wave pump assembly
DE3833833A1 (de) * 1988-10-05 1990-04-12 Kernforschungsanlage Juelich Pumpe
WO1996007827A1 (fr) * 1994-09-06 1996-03-14 Metameric Limited Pompe peristaltique
US5846064A (en) * 1994-09-06 1998-12-08 Metameric Limited Peristaltic pump
US6234773B1 (en) 1994-12-06 2001-05-22 B-Braun Medical, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US5888052A (en) * 1994-12-06 1999-03-30 Mcgraw, Inc. Linear peristaltic pump with reshaping fingers intedigitated with pumping elements
US5826979A (en) * 1996-08-26 1998-10-27 Foss; Milton K. Waste material processing apparatus and method
US6293762B1 (en) 1999-04-22 2001-09-25 Hormoz Farkhan Methods for sealing a tire and for introducing liquid into a tire
US20070196222A1 (en) * 2004-07-28 2007-08-23 Otto Bock Healthcare Ip Gmbh & Co. Kg Pump comprising a moving wall and use of a pump of this type
JP2006348900A (ja) * 2005-06-20 2006-12-28 Japan Servo Co Ltd チューブポンプ
JP4678722B2 (ja) * 2005-06-20 2011-04-27 日本電産サーボ株式会社 チューブポンプ
DE202009001865U1 (de) * 2009-02-11 2010-07-22 Krauss, Gunter Pumpe, insbesondere Schlauchpumpe
US10232111B2 (en) 2013-12-31 2019-03-19 Abbvie Inc. Pump, motor and assembly for beneficial agent delivery

Also Published As

Publication number Publication date
GB1047769A (en) 1966-11-09
DE1553186A1 (de) 1969-10-16
FR1351597A (fr) 1964-02-07
LU45072A1 (fr) 1964-02-21

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