WO1999014496A1 - Diaphragme tubulaire flexible chimiquement resistant - Google Patents

Diaphragme tubulaire flexible chimiquement resistant Download PDF

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Publication number
WO1999014496A1
WO1999014496A1 PCT/US1998/019318 US9819318W WO9914496A1 WO 1999014496 A1 WO1999014496 A1 WO 1999014496A1 US 9819318 W US9819318 W US 9819318W WO 9914496 A1 WO9914496 A1 WO 9914496A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylindrical body
substantially cylindrical
diaphragm
tubular diaphragm
elastomeric material
Prior art date
Application number
PCT/US1998/019318
Other languages
English (en)
Inventor
James V. Bonastia
Original Assignee
United States Filter Corporation
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 United States Filter Corporation filed Critical United States Filter Corporation
Priority to AU93936/98A priority Critical patent/AU9393698A/en
Publication of WO1999014496A1 publication Critical patent/WO1999014496A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/027—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles having an axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B29C43/183—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles the preformed layer being a lining, e.g. shaped in the mould before compression moulding, or a preformed shell adapted to the shape of the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • 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
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/12—Polyvinylhalogenides containing fluorine
    • B32B2327/18—PTFE, i.e. polytetrafluoroethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • Positive pressure diaphragm pumps are used to transfer a variety of fluids.
  • diaphragm pumps include a flexible tubular diaphragm for consistently delivering a measurable amount of fluid to a system.
  • U.S. Patent No. 4,474,540 discloses a hydraulically actuated diaphragm pump with a tubular diaphragm. The pumping is accomplished by hydraulic fluid exerting pressure on the tubular diaphragm. Isolation of the process liquid from the hydraulic fluid is accomplished by using diaphragms in series. That is, a flat diaphragm is used to drive the tubular diaphragm through a coupling fluid. The compression of the coupling fluid in turn causes the mid-section of the tubular diaphragm to compress.
  • Check valves are provided to limit the motion of the pumped or process material and to ensure that there is no back flow of process liquid.
  • Prior art diaphragm pumps are limited in their ability to transport some liquids due to corrosivity or reactivity of those liquids with the diaphragm material.
  • the hydraulic fluid or intermediate coupling fluid may contaminate the process fluid if the structural integrity of the tubular diaphragm is compromised due to corrosion or mechanical failure.
  • tubular diaphragms of prior art pumps have attempted to employ linings of chemically resistant material, but such tubular diaphragms have not been successful because the required flexing or stretching of the tubular diaphragm material typically exceeds the mechanical elasticity limits of the lining.
  • the lining material of the tubular diaphragm deforms or cracks when it is stretched beyond its elastic limit in the pumping operation such that the diaphragm leaks or allows corrosive process fluid to contact the tubular diaphragm material after a short period of use, resulting in failure of the diaphragm as a whole.
  • positive pressure pumps function by compression of the tubular diaphragm.
  • each compression of the tubular diaphragm causes the material within the diaphragm to be discharged from its outlet end. Expansion of the tubular diaphragm then causes fluid to be pulled through the inlet end and into the interior space of the diaphragm for subsequent discharge at the next compression stroke of the pump.
  • each stroke of the pump can be set to cause a measured amount of fluid to be taken into the diaphragm for discharge. Maintenance of uniform flow during each pump stroke would allow controlled measured pumping of fluid.
  • Prior art tubular diaphragms lined with chemically resistant material deform after a short period of use. Deformation prevents even, measured filling of the diaphragm resulting in variations in the volume of material transported with every stroke of the pump.
  • prior art hydraulically actuated tubular diaphragms have oval or elliptical cross sections which do not consistently flex in any one predetermined direction upon compression. Consequently, these diaphragms do not uniformly fill or expand. Predictability in the flex direction of the tubular diaphragm would allow an operator to confirm normal filling operations and normal, consistent pumping by observation through the aforementioned viewing window.
  • the drawbacks of these prior art oval or elliptical tubular diaphragms not only affect the observation capabilities of the operator, but also result in uneven filling and emptying of the tubular diaphragm, resulting in flow variation from the pump discharge.
  • the present invention is directed to a tubular diaphragm having a substantially cylindrical body.
  • the body includes an outer portion comprising a layer of elastomeric material having an inner surface.
  • a chemically resistant lining material is disposed adjacent the inner surface of the layer of elastomeric material.
  • the cross-sectional configuration of the substantially cylindrical body is substantially circular along its length.
  • the substantially cylindrical body can have a length to diameter ratio of at least about 4.5:1.
  • the lining material can contain polytetrafluoroethylene and/or can have a wall thickness which is substantially the same along the length of the substantially cylindrical body.
  • the elastomeric material can be chlorosulfonated polyethylene.
  • a hydraulic pump which includes a pump head having a suction inlet and a discharge outlet.
  • a tubular diaphragm is housed in the pump head and extends between the suction inlet and the discharge outlet.
  • the tubular diaphragm is surrounded by a first fluid in a first confined space such that the first fluid is capable of compressing the tubular diaphragm to pump a second fluid located within the diaphragm through the discharge outlet under positive pressure.
  • the tubular diaphragm includes a substantially cylindrical body having an outer portion comprised of elastomeric material and having an inner liner comprised of chemically resistant material.
  • the cross- sectional configuration of the substantially cylindrical body is substantially circular from the suction inlet to the discharge outlet.
  • the wall thickness of the substantially cylindrical body can be substantially constant from the suction inlet to the discharge outlet.
  • the tubular diaphragm can include radially extending flanges on its opposite ends.
  • the substantially cylindrical body can have a length to diameter ratio of at least about 4.5:1.
  • the inner liner of the tubular diaphragm can include polytetrafluoroethylene.
  • the elastomeric material can be chlorosulfonated polyethylene and/or can be mechanically bonded to the chemically resistant material.
  • the hydraulic pump can further include a piston, a substantially flat diaphragm in communication with the first confined space containing the first fluid, and a second confined space between the piston and the substantially flat diaphragm containing a third fluid.
  • Another aspect of the present invention is directed to a method of making a tubular diaphragm.
  • the method includes the steps of forming a substantially cylindrical body comprised of a chemically resistant material and applying an elastomeric material to the outer surface of the substantially cylindrical body to surround the body, thereby forming a composite substantially cylindrical body.
  • the composite body is then molded such that it has a substantially uniform circular cross-sectional configuration along its length.
  • the molded composite body is then heated to a predetermined temperature under pressure.
  • the method can include molding the composite substantially cylindrical body such that its length to diameter ratio is at least about 4.5:1.
  • the method can include the additional step of forming radially extending flanges at each end portion of the composite substantially cylindrical body.
  • the chemically resistant material can be polytetrafluorethylene. and/or the elastomeric material can be chlorosulfonated polyethylene.
  • FIG. 1 is a cross-sectional, partial view of an aspect of the present invention
  • FIG. 2 is an enlarged, cross-sectional view of an aspect of the present invention taken along line 2-2 in FIG. 1 ;
  • FIG. 3 is an enlarged view of an aspect of the present invention
  • FIG. 4 is an enlarged view of an aspect of the embodiment shown in FIG. 1;
  • FIG. 5 is an alternative embodiment of an aspect of the present invention shown in FIG. 4;
  • FIG. 6 is a partial view of an aspect of the present invention
  • FIG. 7 is an enlarged view of an aspect of the present invention
  • FIG. 8 is an enlarged, partial view of the aspect of the invention shown in FIG. 6;
  • FIG. 9 is an enlarged, partial view of the aspect of the invention shown in FIG. 7;
  • FIG. 10 is an enlarged, partial view of another aspect of the present invention; and
  • FIG. 11 is an enlarged, partial view of another aspect of the present invention.
  • one aspect of the present invention is directed to a diaphragm pump 20, including a conventional power source 22 which operates a reciprocating piston 24 slidably arranged in a cylinder housing 26.
  • Diaphragm pump 20 also includes a pump head or casing 28 sealably connected to cylinder housing 26.
  • a working diaphragm e.g.. a disk-type diaphragm
  • Apertured support plates 32 and 34 limit the movement of working diaphragm 30.
  • a working hydraulic fluid is provided in a chamber 36 between piston 24 and diaphragm 30.
  • Pump head 28 includes an elongated chamber 40, an end cap 42 at a discharge end 44, a discharge ball valve 46 with associated valve housing assembly 48 and an adapter 50 located between valve housing assembly 48 and chamber 40.
  • a sealing member 52 is provided between housing assembly 48 and adapter 50 as well as within the assembly itself to prevent leakage of pumped material.
  • a similar arrangement is provided at the inlet or suction end 54 of pump head 28, and includes an end cap 56, a suction or inlet ball valve assembly 58, including a shiftable ball valve 60 and valve housing assembly 62, an adapter 64. and a sealing member 66.
  • a flexible cylindrical tubular diaphragm 68 is housed in chamber 40 and is surrounded by an intermediate fluid which is compressed by movement of working diaphragm 30. Such compression of the intermediate fluid functions to compress tubular diaphragm 68, thereby causing metered flow through the inlet ball valve assembly 62 and discharge through outlet ball valve assembly 46.
  • Tubular diaphragm 68 (best shown in FIG. 1 and FIG. 4) includes an elastomeric material layer 70 and a chemically resistant material layer 72.
  • the elastomeric material should be chosen such that elastomeric material layer 70 will provide sufficient support to chemically resistant layer 72 yet retain flexibility.
  • Suitable elastomeric materials include synthetic rubbers, such as Hypalon ® chlorosulfonated polyethylene, available from E.I. Dupont de Nemours and Company, Wilmington. Delaware.
  • Layer 72 can be formed of a substantially chemically inert material which maintains its integrity when exposed to corrosive materials, such as strong acids and bases.
  • a suitable chemically inert material is Teflon ® polytetrafluoroethylene material, available from E.I. Dupont de Nemours and Company.
  • Elastomeric material layer 70 may be mechanically bonded to chemically resistant layer 72 by any method that allows elastomeric material layer 70 to consistently remain affixed to chemically resistant layer 72. Suitable methods of mechanical bonding may include heat bonding, electrostatic bonding, or adhesive bonding. Elastomeric material layer 70 should be affixed to chemically resistant layer 72 in a manner that prevents cracking or separation during use.
  • a tube 74 of chemically resistant material can be machined while supported on a mandrel 76 to form tubular lining 72 (shown in FIG. 7 and FIG. 9) having desired thickness, length, and diameter dimensions.
  • the machined liner material can also include flanges 78 at its opposite ends.
  • An uncured elastomeric material layer 80 (FIG. 10) is then applied to the outside of machined tubular lining 72 and the coated lining is placed in a mold 82 (as shown in FIG. 11) and heated to facilitate bonding of the elastomeric material to the chemically resistant material.
  • the temperature can be selected based upon the type of elastomeric material used, as different synthetic rubber materials will bond at varying temperatures. However, under most circumstances, the temperature should not exceed the selected maximum temperature for the elastomeric material or the chemically resistant liner to avoid heat degradation of either material. In various applications, it may be preferable to etch an outer surface 84 of the tubular lining material 72 prior to application of the elastomeric material. Typically, this etching will facilitate mechanical bonding of the elastomeric material to the outer surface of tubular liner 72. Teflon ® material lined tubular diaphragms are available, for example, from Tempron Products, Inc., of Milford. Massachusetts.
  • Tube 74 is machined to form a substantially cylindrical body.
  • the substantially cylindrical body formed has a wall thickness sufficient to provide support yet retain flexibility.
  • the wall thickness is between about 0.016 inch and about 0.020 inch.
  • the exterior surface of liner 72 is then chemically etched or mechanically treated to roughen its outer surface to facilitate mechanical bonding.
  • Uncured elastomeric material (such as chlorosulfonated polyethylene) is then applied to the outer surface of liner 72.
  • the coated tube is then placed into mold 82, wherein the elastomeric material is cured (e.g., with heat and pressure) resulting in a mechanical bond between the elastomeric material and the lining material.
  • the tubular diaphragm be configured so that the ratio of its length to its diameter lessens the tendency of the tubular diaphragm to kink or deform.
  • the ratio is greater than about 4.5 : 1.
  • a more preferred aspect ratio is between about 5.7: 1 and about 5.9: 1.
  • a length to diameter ratio of greater than about 4.5 should yield a diaphragm that maintains integrity over extended periods, such as at least one year wherein, for example, it is assumed that in one year of operation, a pump will run 75.48 x 10 6 cycles. based upon 144 cycles per minute, (144 cpm x 60m/h x 24h/d x 365 d year).
  • the preferred ratios of the tubular diaphragm also provide for sufficient structural support so that the liner is not stressed beyond the elastic capacity of the combination of the elastomeric material and the chemically resistant liner material.
  • tubular diaphragm 68 is substantially cylindrical having a substantially circular cross sectional configuration along its entire length.
  • the side wall configuration of the tubular diaphragm 68 is shown in more detail in FIG. 4.
  • Outer layer 70 of tubular diaphragm 68 is preferably sufficiently thick to provide proper support yet retain desired flexibility.
  • tubular diaphragm 68 is between about 1.7 mm and about 2.5 mm in thickness. More preferably, the thickness of the elastomeric material layer of the sidewall of the tubular diaphragm is between about 1.9 mm to about 2.2 mm in thickness.
  • the thickness of the elastomeric material forming the side wall of the tubular diaphragm can be uniform along its major axis, and the chemically resistant layer can have a uniform thickness along the entire interior surface of the tubular diaphragm.
  • the chemically resistant material can be bonded to the elastomeric material along the entire length of the tubular diaphragm.
  • the chemically resistant layer is sufficiently thick to provide the necessary protection while maintaining flexibility.
  • the chemically resistant layer is between about 0.3 mm and about 0.4 mm in thickness.
  • the dimensions of the side wall thickness, length and diameter may be modified or altered in accordance with the requirements of different pumps used in various applications.
  • the end portions of tubular diaphragm 68 can have radially extending flanges 78
  • FIGS. 1, 3, 4, and 5 which may be provided with a ring-like configuration formed of a combination of the liner material and elastomeric material that form the side wall of tubular diaphragm 68.
  • Radially extending flanges 78 enable tubular diaphragm 68 to form a leakproof seal with a connection cooperatively fitted to end portions 44, 54.
  • One end portion 54 is be connected to the inflow and the other end portion 44 is connected to the outflow end of the pump.
  • the thickness T 2 (FIG.
  • each flange portion 3 of the elastomeric material of each flange portion is the same as the thickness of the elastomeric material of the tubular portion of tubular diaphragm 68, .and the thickness T 1 of the liner material of each end portion is also the same as that of the tubular portion.
  • FIG. 4 shows the adapted head design for use in conjunction with the lined elastomeric tubular diaphragm 68.
  • an adapter head 50 may be employed to permit the preferred length of tubular diaphragm 68 to be installed into the pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un diaphragme tubulaire flexible chimiquement résistant et un procédé de fabrication. Ce diaphragme est doté d'un corps sensiblement cylindrique qui présente une longueur et une partie extérieure comprenant une couche de matériau élastomère à surface interne. Le corps sensiblement cylindrique comporte un matériau de garnissage chimiquement résistant, adjacent à la surface interne. La configuration en coupe transversale du corps sensiblement cylindrique est sensiblement cylindrique sur sa longueur. Le procédé consiste à former un corps sensiblement cylindrique à base de matériau chimiquement résistant et à appliquer un matériau élastomère sur la surface externe dudit corps, de manière à entourer celui-ci et à constituer un corps composite sensiblement cyclindrique. On moule ensuite le corps composite pour obtenir une configuration sensiblement uniforme en coupe transversale qui est circulaire sur sa longueur, avant de le chauffer sous pression à une température prédéterminée.
PCT/US1998/019318 1997-09-17 1998-09-17 Diaphragme tubulaire flexible chimiquement resistant WO1999014496A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU93936/98A AU9393698A (en) 1997-09-17 1998-09-17 Flexible, chemically resistant tubular diaphragm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6000897P 1997-09-17 1997-09-17
US60/060,008 1997-09-17

Publications (1)

Publication Number Publication Date
WO1999014496A1 true WO1999014496A1 (fr) 1999-03-25

Family

ID=22026743

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/019318 WO1999014496A1 (fr) 1997-09-17 1998-09-17 Diaphragme tubulaire flexible chimiquement resistant

Country Status (2)

Country Link
AU (1) AU9393698A (fr)
WO (1) WO1999014496A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102758754A (zh) * 2012-04-20 2012-10-31 杭州大潮石化设备有限公司 结构简化的管式隔膜计量泵液力端结构
CN102826243A (zh) * 2012-09-06 2012-12-19 汕头市虹钜机械有限公司 用于液态物质的定量灌装机构及灌装机
NL2016463B1 (nl) * 2016-03-21 2017-10-04 Millennium Innovations B V Pomp.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3551076A (en) * 1968-03-22 1970-12-29 Interpace Corp Tubular diaphragm pump
US3666379A (en) * 1970-07-17 1972-05-30 Pennwalt Corp Tandem diaphragm metering pump for corrosive fluids
US4474540A (en) 1982-09-10 1984-10-02 Pennwalt Corporation Tubular diaphragm pump
US4840849A (en) * 1986-08-20 1989-06-20 Tosoh Corporation Laminated article from molding compositions of a chlorosulfonated polyolefin and a fluorine-containing elastomer
US5032335A (en) * 1989-07-12 1991-07-16 Mather Seal Company Manufacture of sealing elements of composite sintered polymeric material
US5349896A (en) * 1993-06-14 1994-09-27 W. L. Gore & Associates, Inc. Pump diaphragm
US5427831A (en) * 1993-11-12 1995-06-27 E. I. Du Pont De Nemours And Company Fluoropolymer laminates
EP0676276A1 (fr) * 1993-09-10 1995-10-11 Tokai Rubber Industries, Ltd. Tuyau d'essence et ses procede et appareil de production

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3551076A (en) * 1968-03-22 1970-12-29 Interpace Corp Tubular diaphragm pump
US3551076B1 (fr) * 1968-03-22 1984-02-14
US3666379A (en) * 1970-07-17 1972-05-30 Pennwalt Corp Tandem diaphragm metering pump for corrosive fluids
US4474540A (en) 1982-09-10 1984-10-02 Pennwalt Corporation Tubular diaphragm pump
US4840849A (en) * 1986-08-20 1989-06-20 Tosoh Corporation Laminated article from molding compositions of a chlorosulfonated polyolefin and a fluorine-containing elastomer
US5032335A (en) * 1989-07-12 1991-07-16 Mather Seal Company Manufacture of sealing elements of composite sintered polymeric material
US5349896A (en) * 1993-06-14 1994-09-27 W. L. Gore & Associates, Inc. Pump diaphragm
EP0676276A1 (fr) * 1993-09-10 1995-10-11 Tokai Rubber Industries, Ltd. Tuyau d'essence et ses procede et appareil de production
US5427831A (en) * 1993-11-12 1995-06-27 E. I. Du Pont De Nemours And Company Fluoropolymer laminates
US5427831B1 (en) * 1993-11-12 1998-01-06 Du Pont Fluoropolymer laminates

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102758754A (zh) * 2012-04-20 2012-10-31 杭州大潮石化设备有限公司 结构简化的管式隔膜计量泵液力端结构
CN102826243A (zh) * 2012-09-06 2012-12-19 汕头市虹钜机械有限公司 用于液态物质的定量灌装机构及灌装机
NL2016463B1 (nl) * 2016-03-21 2017-10-04 Millennium Innovations B V Pomp.

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Publication number Publication date
AU9393698A (en) 1999-04-05

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