US2849026A - Flexible fluid sealing diaphragm - Google Patents

Flexible fluid sealing diaphragm Download PDF

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Publication number
US2849026A
US2849026A US554756A US55475655A US2849026A US 2849026 A US2849026 A US 2849026A US 554756 A US554756 A US 554756A US 55475655 A US55475655 A US 55475655A US 2849026 A US2849026 A US 2849026A
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Prior art keywords
diaphragm
fabric
hat
wall
blank
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Expired - Lifetime
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US554756A
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English (en)
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John F Taplin
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Individual
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Priority to US554756A priority patent/US2849026A/en
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    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • B29C51/004—Textile or other fibrous material made from plastics fibres
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/82—Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/02—Diaphragms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/06—Bellows pistons

Definitions

  • This Vinvention relates te diaphragms for use in pressure responsive systems and more particularly to diaphragms exhibiting'high sensitivity -and providing a uniform response -to pressures applied thereto and so constructed and mounted as to provide a rolling-type seal whose mean effective area is constant as it is displaced.
  • Diaphragms have long been used for transforming a pressure into an actuating force for ⁇ controlling 'a mechanism.
  • application of diaphragms has been limited for various reasons, chief among these being 1) variations in the mean effective area ofthe Vdiaphragm throughout the operating stroke, (2) Vdiiiiculty in yfully obtaining the desired stroke, (3) excessive wear, (4) reduced flexibility of the Idiaphragmbecause of attempts to strengthen the material to prevent it from vrupturing, (5) introduction of a spring vgradient when the material was preformed to ⁇ a-desired diaphragm shape, and, (6) excessive cost due: to inefficient methods 'of manufacture.
  • Another objectof vthis invention isto p'r'ovide'a diaphragm that can be ⁇ doubled upon "tself 'iin -a sharp bend or fold when installed in a linear pressure actuating mechanism and which' when so mounted is sensitive lto slight variations in pressure anpermis achievement Vof a v'constant pressure-force 'ratio tt'ru erating stroke of the mechanism.
  • a further object of this invention is to provide a ldiaphragm whose 'extensibility is preciete'nnin'afeiy ⁇ limited to'rp'rovide a, constant effective working area.
  • Anothertspecific object of this invention is to provide methodsof making 'diaphragms having novel istructural characteristics permitting achievement-ofthe foregoing objects. ⁇ Method claimsv directed Vto subject matter disclosed herein are being prosecuted in my copending applications SerialV Nos. I623,607y and 623,608, and in mY divisional application entitled Methcd of lMaking Flexible vFluid Sealing Diaphragm and Filed April 4,1958.
  • Fig. 2 ⁇ is a planv view""of 'a fabric-blnknse'able with the deviceof Figs. land 3';
  • Fig. 4 is a plan Viewn of the fabric blank after being molded by the device of Figs. 1 and 3;
  • Fig. 5 is an enlarged plan view similarto Fig. 4 showing how the threads of the fabric have been rearranged during the molding step;
  • Fig. 6 is an enlargedvview in perspective of the same fabric after molding
  • Figs. 7 and 8 illustrate a nrst method of coating the molded fabric to render it impervious to fluid
  • Fig. 9 illustrates a second method of coating the molded fabric
  • Fig. 10 is a plan view of the completed diaphragm
  • Fig. 11 is a sectional view in elevation of a completed diaphragm
  • Fig. 12 is a sectional view in elevation of a diaphragm constructed according to'this invention mounted between a cylinder and a piston;
  • Fig. 13 is a sectional View in elevation of a modified embodiment of a diaphragm according to the invention and having a double frusto-conical wall; Y
  • Fig. 14 is an enlarged sectional view taken on the line 14-14 of Fig. 3 showing axial corrugations in the -male and femalemembers of the mold.
  • each such embodiment has the general shape of a ⁇ hat, comprising a cylindrical or slightly conical wall having a at head or ange portion extending transversely inwardly from the top thereof and a flange portion extending radially outward from the bottom of said wall.
  • the flat head portion may be annular or entirely closing the circumferential wall.
  • Each hat is formed of unseamed homogeneous fabric and through various novel expedients the cylindrical or Vconical wall has substantial dimensional stability longitudinally and predetermined dimensional extensibility circumferentially.
  • Each hat, having a cylindrical/ or conical wall, is circular in cross section; as
  • circular cross section refers to such ⁇ embodiments, which are ch-aracterizedby a single generally circular configuration in'cross section.
  • these hat shaped diaphragms are bent over into a-reverse configuration which would be characterized at certain cross sections thereof (see, for example Fig. 12) by an annular or ring-like rather than circular configuration.
  • each hat is treated to render it impervious to fluid under pressure. Generally this is accomplished by coating the fabric with an impervious elastomer.
  • Figs. 1 through 11 illustrate a first type of novel diaphragm having the aforesaid characteristics and the preferred methods of making it.
  • the diaphragm is constructed from a blank of flat woven or loomed fabric 2 (Fig. 2).
  • Such fabric is made up of interlocking iibers, as is also, for example knitted fabric.
  • the blank is circular, but it may be otherwise.
  • the minimumy val'ue of the diametrical dimension of the circular blank depends upon the sizeof the hat-shaped diaphragm'desired t'o be formed.
  • a molding die 4 (Fig. l) having a cylindrical or slightly conical cavity or hole 6 and a countersink 8.
  • the diameter of cavity 6 is substantially equal to the outside diameter of the cylindrical wall of the hat to be formed.
  • the diameter of countersink 8 is sufficiently large to receive blank 2.
  • a plate 10 having a central opening 12 of diameter intermediate in value to the diameter of cavity 6 and countersink 8 is then placed on top of blank 2.
  • Plate 10 has lingers 14 adapted to receive therebetween eye bolts i6 which are pivotally connected to peripheral extensions 18 of die Bolts i6 are threaded to receive wing nuts 20 which cooperate with these bolts to clamp plate lf) to die 4. Nuts 20 are tightened to bring plate 10 into intimate contact with blank 2, i. e., until the spacing between plate 10 and countersink 8 is equal to or slightly less than the thickness of the blank before plate 10 is placed upon it. The pressure of plate 10 on the fabric blank is not however sufiicient to prevent sliding movement of the blank when a suitable force is applied to the blank.
  • male die 22 having a peripheral flange 24 is brought into engagement with blank 2 forcing it downwardly into cavity 6 into the position shown in Fig. 3.
  • Male die 22 is identical in shape to cavity 6, but its diameter is less than the diameter of cavity 6, differing therefrom by an amount equal to twice the thickness of blank 2. This dierence in diameter is critical. If, when as illustrated, a single blank is deformed, the difference in diameter between male die 22 and cavity 6 is more than twice the thicko ness of blank 2, the fabric will tend to double upon itself when forced downwardly into the constriction of cavity 6. If the difference is less than twice the thickness of blank 2, the fabric is forced into the cavity only with considerable difficulty and possible rupture.
  • Peripheral clearance between the male and female dies is thus made as great in amount as possible while remaining still insufficient to allow the quantity of fabric deformed therebetween to double upon itself.
  • the blank is drawn by the male die into the cavity and, under the influence of the heat and pressure applied thereto by the male die, its central portion assumes the shape of the space between male die 22 and the cavity 6.
  • plate 10 is clamped against blank 2 only to the extent necessary to keep the fabric flat while still permitting it to be drawn radially inward toward cavity 6.
  • This factor in combination with the critical spacing between cavity 6 and male die 22 causes the fibres of blank 2 to be rearranged in a unique manner by the dies.
  • the blank which was initially circular as in Fig. 2, is molded into the shape of a hat 26 which as seen in Figs. 4, 5, and 6, now has a substantially rectangular peripheral ange 28, a cylindrical, tubular or conical portion 30, and an end portion 32.
  • a substantially rectangular peripheral ange 28 a cylindrical, tubular or conical portion 30, and an end portion 32.
  • the warp and filling threads have been widely spaced for ease of illustrating the behaviour of the threads as the hat is formed. It will be understood, however, that the blank 2 is a closely woven fabric and that all the threads therein follow the pattern assumed by the illustrative threads 34 and 36 of Figs. 5 and 6.
  • the circular blank has been use as it illustrates most plainly the rearrangement of the fibres.
  • blanks of other starting shapes may be used in practice for the initial rim configuration is immaterial and is removed by subsequent trimming.
  • peripheral flange portion 28 of the hat formed from fiat circular blank 2 has the general configuration of a square 4 with its sides slightly bowed inwardly at their midpoints. This configuration is due to the fact that the proximity of the male and female dies causes the blank to be stressed in a direction parallel to the axis of cavity 6 and compressed circumferentially of cavity 6 thereby producing rearrangement of the fibres.
  • the warp threads 34 at A are substantially straight, having been axially dislodged to only a slight degree while the filling threads 36 at A are curved, having been rearranged by circumferential compression of the cylindrical part of the fabric, and now lie at an oblique angle to the warp threads.
  • the expression in compression is used herein, there is always referred to the condition described generally in this paragraph, involving forcing fabric between simple male and female dies.
  • the flange at A and the cylindrical part at D is substantially non-stretchable in the direction of the warp, but extensible in the direction of the filling.
  • the warp and filling threads comprising the cylindrical or slightly conical wall have also been rearranged from their original mutually perpendicular arrangement in the fiat blank 2.
  • the portion of the wall D comprises substantially straight warp threads and bowed filling threads.
  • the reverse situation exists in the portion of the wall E where the lling is straight and the warp bowed.
  • the warp and filling threads are obliquely arranged, having been stressed axially and compressed circumferentially. Consequently the cylindrical wall 30 is stretchable circumferentially but not axially.
  • the extensibility of the wall is a minimum adjacent the top and a maximum adjacent the rim.
  • top or end portion 32 of the hat differs substantially from the flange and wall portions.
  • the top or end of the hat comprises warp and filling threads which are still in their original mutually perpendicular arrangement. Consequently, the top or end of the hat will be non-extensible in all the directions as the axial forces to be applied along the wall portion will be equal, thus to hold the end portion undeformed.
  • the circumferential extensibility of the flange portion of the hat is likewise not objectionable. The reason for this is that the diaphragm when mounted in a suitable actuator device is clamped at its peripheral flange and end portion, leaving the circumferential wall portion free to respond rapidly to fluctuations in pressure.
  • the fabric hat 26 After the fabric hat 26 has been formed from blank 2, it is treated with a'suitable material to render it impervious to uids. Preferably, this is accomplished by separately forming a similar hat 40 of a suitable elastomer. Thereafter, as shown in Figs. 7 and 8, the elastomer hat 40 is positioned on the upstanding plug of a heated mold 42. The fabric hat 26 is placed over the elastomer hat, and a complementary mold 44 having an internal cavity mold 42. ⁇ Due to the heat and pressure of the molds the elastomer ows into the interstices of the fabric and sets. Thereafter, the diaphragm is removed and its outwardly extending ange trimmed to the required size.
  • the nished diaphragm designated generally at 50, Vappears as shown ⁇ in Figs. and 11 ready for use.
  • the numerals 52 and 54 designate the 4cloth and the elastomer sides-of the ⁇ diaphragm respectively and 58 designates the finished rim. Ifldesired a circular-holemay be cut in the end of therrhat as shownby the dotted line 56in Fig. l1 so as to leave Van inwardly extendingannular flange.
  • Fig.' 12 illustrates how the diaphragm is used."l
  • the out- I wardly ⁇ extending flange 58 of the hat shaped diaphragm is clamped between complementary flanges 62 of the cylinder 60 of a pressure actuator unit.
  • the central head portion' of the hat is secured againsta piston 64 by a plate 66 which.. preferably has 'a-.peripheral anget to hold the diaphragm against the piston.
  • the 'fabric or convex side 52 of the diaphragm is mounted adjacent the piston and the elastomer or concave side 54 of the diaphragm is mounted against the plate.
  • the hat is reversed so that the cylindrical portion is now 180 removed from its original position relative to the head portion, thus permitting the formation of a deep convolution as at 71.
  • the wall portion of the diaphragm is circumferentially expandible, as the piston carying the inner portion of the diaphragm moves relative to the cylinder carrying the outer portion, material is payed olf by a rolling action from the inner cylindrical portion to the outer in one direction of piston movement and vice versa in the other. Because the diaphragm is expandible only in a circumferential direction, the mean effective area of the diaphragm remains constant during the operating stroke so as to create a force which varies in direct proportion to the differential pressure thereacross regardless of the particular position of the -piston in the stroke.
  • Diaphragms--constructed as explained hereinabove have been found to have a controlled area ⁇ that is constant within 0.f1%,or1ess, have4essentially an unlimited-life under normal design conditions, have substantially fricvtionless rolling action, andwithstand temperature variations from -minus 65'F-to-.pll1s 600 F. and variations in pressure ⁇ from zero to-500 p.s.i .l
  • the y faltaric hat is ⁇ so formed that its free circumference issuciently large to fit around the cylinder of the V-actuatorwithout substantial stretching of the cordst-hereof, it shouldA be understood that it may be formed with a circumference smaller than the cylinder bore-by providing -tine-axialfsurfacecorrugations in the male and female members 2,2- and6 of Figs. 1 and 3 (see Figi.V 14).
  • thevn-i-shed-hat lby virtue of Vthe added corrugations which -r-un parallelto the longitudinal axis, has i more ⁇ circumferentiall stretchabilitythanl the previously described construction.
  • Fig. 13 illustrates a modification in which the Wall is double conical, being made up of two integral frustums of cones and 112, the frustum 110 connecting with the frustum 112 at the largest diameter of the former and the smallest diameter of the latter, the frustum 110, being the portion of the wall in which most rolling action will take place, having a lesser taper than the frustum 112, since circumferential expansion takes place more easily than circumferential compression.
  • the diaphragms constructed according to the present invention are made from nylon when designed to be used below temperatures of 210 F. In the temperature range of 210 F. to 260 F., Orlon fabric is preferred. At higher temperatures glass cloth is used, the maximum temperature being limited in this case by the elastomer. Diaphragms constructed of glass cloth coated with a Silastic elastomer are satisfactory for sustained operation up to a temperature of 500 F.
  • elastomer is used herein to denote any material such as rubber, synthetic rubber, or like materials capable of rendering the fabric impervious to fluids while at the same time permitting the diaphragms to be rolled into a deep convolution which is free positioning in response to variations in applied pressure.
  • a rolling seal diaphragm with a flexible, Huid-tight wall portion having a substantially circular cross section comprising, a layer of fabric of the type having interlocking fibers and having adherent thereto a fluid-tight layer of elastomer, said layer of fabric being non-extensible longitudinally of said wall and in compression circumferentially thereof to provide limited extensibility circumferentially thereof, said wall having a transversely inwardly extending wall adjacent one end and ange means adjacent the opposite end forming diaphragm attaching means, whereby said wall may roll from an inner surface onto a surrounding outer surface of larger perimeter with respect to which said inner surface is axially relatively movable, said fabric layer giving support at the upper limit of said limited extensibility against further stretching, and said fabric layer nowhere in said wall presenting more than a single thickness, whereby said wall is free of mechanically weakening overlapping pleats.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Diaphragms And Bellows (AREA)
US554756A 1955-12-12 1955-12-12 Flexible fluid sealing diaphragm Expired - Lifetime US2849026A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976726A (en) * 1959-08-13 1961-03-28 Sprague Meter Company Gas impervious diaphragm
US3013920A (en) * 1957-03-01 1961-12-19 Us Rubber Co Method of making a flexible diaphragm for use in fluid springs
US3083734A (en) * 1959-07-29 1963-04-02 John F Taplin Rolling seal diaphragm
US3140085A (en) * 1961-02-14 1964-07-07 Bourcier Christian Marie Louis Shock absorbers
DE1192892B (de) * 1959-07-29 1965-05-13 John Ferguson Taplin Verfahren zum Praegen einer mit einem Verstaerkungsgewebe versehenen Rollmembran
US3205110A (en) * 1960-07-08 1965-09-07 Lonza Electric & Chem Works Method for producing shaped multilayer bodies
US3386345A (en) * 1966-08-01 1968-06-04 John F. Taplin Rolling diaphragm device having centering button on diaphragm and having piston rod rotatable relative to piston
US3403603A (en) * 1965-06-08 1968-10-01 George & Angus & Company Ltd Tubular rolling diaphragms
US3440970A (en) * 1967-05-17 1969-04-29 Josef Wagner Diaphragm pump
US3757815A (en) * 1972-02-10 1973-09-11 J Orr Pressure relief valve
US4185069A (en) * 1976-02-08 1980-01-22 Smith George L Production of plastics articles
FR2577164A1 (fr) * 1985-02-12 1986-08-14 Flonic Sa Procede de realisation de membranes synthetiques pour compteur a gaz et compteur a gaz comportant une membrane obtenue par la mise en oeuvre dudit procede
FR2600936A1 (fr) * 1986-07-07 1988-01-08 Cofim Procede et dispositif pour la realisation de preformes pour pieces en materiaux composites
FR2603842A1 (fr) * 1986-09-17 1988-03-18 Bronzavia Air Equipement Procede de realisation de pieces en materiaux composites, dispositif pour sa mise en oeuvre et pieces obtenues par la mise en oeuvre de ce procede
US4850391A (en) * 1987-01-27 1989-07-25 Mensor Corporation Flow control valve
US4857048A (en) * 1987-05-29 1989-08-15 Hewlett-Packard Company IV pump and disposable flow chamber with flow control
WO1991017035A1 (en) * 1990-04-30 1991-11-14 Ontario Die Company Of America Method and apparatus for producing structural injection moldings
US5138936A (en) * 1990-01-01 1992-08-18 Elie Kent Unlimited amplitude rolling piston
US5182065A (en) * 1990-04-30 1993-01-26 Ontario Die Company Limited Method for producing structural injection molded parts using lost motion movement between a mold and surrounding cutting blade
EP0830929A1 (en) * 1996-09-10 1998-03-25 SIGOM S.r.l. Process for manufacturing rubber membranes with a textile insert
US20070044653A1 (en) * 2005-08-25 2007-03-01 Honeywell International, Inc. Pneumatic diaphragm having a bias weave pattern
US20070240564A1 (en) * 2006-04-13 2007-10-18 Toray Engineering Co., Ltd. Piston, method of producing the piston, and pump having the piston
US8449265B2 (en) 2010-05-26 2013-05-28 National Oilwell Varco, L.P. Hydraulically actuated reciprocating pump
US9121397B2 (en) 2010-12-17 2015-09-01 National Oilwell Varco, L.P. Pulsation dampening system for a reciprocating pump
US20230001061A1 (en) * 2008-07-25 2023-01-05 Baxter International Inc. Flow regulation device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126215A1 (de) * 1981-07-03 1983-03-10 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Topfmembran

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US971583A (en) * 1909-08-12 1910-10-04 Benjamin Bell Pneumatic spring.
US1077472A (en) * 1912-07-18 1913-11-04 Josef Hofmann Pneumatic spring.
DE339517C (de) * 1921-07-28 Allg Vergasungs Ges M B H Druckregler mit einer zwischen zwei konzentrischen Zylindern abrollenden Membran aus Kautschuk o. dgl.
GB405686A (en) * 1932-08-10 1934-02-12 Arthur William Simmons Improvements relating to flexible abutments for apparatus actuated by fluid under pressure
US2178953A (en) * 1937-10-16 1939-11-07 Wright Aeronautical Corp Hydraulic plunger seal
US2285967A (en) * 1940-08-22 1942-06-09 Du Pont Method for production of fabrics
US2304989A (en) * 1940-09-20 1942-12-15 Celanese Corp Production of wearing apparel
US2444394A (en) * 1943-03-11 1948-06-29 Lane Wells Co Method of molding diaphragms
US2460168A (en) * 1944-08-14 1949-01-25 Caserta Michele Method of making a diaphragm
US2697057A (en) * 1948-12-23 1954-12-14 Ortho Pharma Corp Method of making a diaphragm

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US2317869A (en) * 1941-04-15 1943-04-27 Lewis E Walton Combination hydraulic and rubber die
DE802297C (de) * 1948-12-19 1951-02-08 Knorr Bremse Gmbh Waelzhaut-Abstuetzung
DE803505C (de) * 1948-12-19 1951-04-02 Knorr Bremse Gmbh Faltenloser Gewebekoerper mit im Betrieb stark wechselnder Form, insbesondere zur Verwendung als Stuetzkoerper fuer Waelzhautdichtungen

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE339517C (de) * 1921-07-28 Allg Vergasungs Ges M B H Druckregler mit einer zwischen zwei konzentrischen Zylindern abrollenden Membran aus Kautschuk o. dgl.
US971583A (en) * 1909-08-12 1910-10-04 Benjamin Bell Pneumatic spring.
US1077472A (en) * 1912-07-18 1913-11-04 Josef Hofmann Pneumatic spring.
GB405686A (en) * 1932-08-10 1934-02-12 Arthur William Simmons Improvements relating to flexible abutments for apparatus actuated by fluid under pressure
US2178953A (en) * 1937-10-16 1939-11-07 Wright Aeronautical Corp Hydraulic plunger seal
US2285967A (en) * 1940-08-22 1942-06-09 Du Pont Method for production of fabrics
US2304989A (en) * 1940-09-20 1942-12-15 Celanese Corp Production of wearing apparel
US2444394A (en) * 1943-03-11 1948-06-29 Lane Wells Co Method of molding diaphragms
US2460168A (en) * 1944-08-14 1949-01-25 Caserta Michele Method of making a diaphragm
US2697057A (en) * 1948-12-23 1954-12-14 Ortho Pharma Corp Method of making a diaphragm

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013920A (en) * 1957-03-01 1961-12-19 Us Rubber Co Method of making a flexible diaphragm for use in fluid springs
US3083734A (en) * 1959-07-29 1963-04-02 John F Taplin Rolling seal diaphragm
DE1192892B (de) * 1959-07-29 1965-05-13 John Ferguson Taplin Verfahren zum Praegen einer mit einem Verstaerkungsgewebe versehenen Rollmembran
US2976726A (en) * 1959-08-13 1961-03-28 Sprague Meter Company Gas impervious diaphragm
US3205110A (en) * 1960-07-08 1965-09-07 Lonza Electric & Chem Works Method for producing shaped multilayer bodies
US3140085A (en) * 1961-02-14 1964-07-07 Bourcier Christian Marie Louis Shock absorbers
US3403603A (en) * 1965-06-08 1968-10-01 George & Angus & Company Ltd Tubular rolling diaphragms
US3386345A (en) * 1966-08-01 1968-06-04 John F. Taplin Rolling diaphragm device having centering button on diaphragm and having piston rod rotatable relative to piston
US3440970A (en) * 1967-05-17 1969-04-29 Josef Wagner Diaphragm pump
US3757815A (en) * 1972-02-10 1973-09-11 J Orr Pressure relief valve
US4185069A (en) * 1976-02-08 1980-01-22 Smith George L Production of plastics articles
FR2577164A1 (fr) * 1985-02-12 1986-08-14 Flonic Sa Procede de realisation de membranes synthetiques pour compteur a gaz et compteur a gaz comportant une membrane obtenue par la mise en oeuvre dudit procede
EP0192555A1 (fr) * 1985-02-12 1986-08-27 Schlumberger Industries Procédé de réalisation de membranes synthétiques pour compteur à gaz et compteur à gaz comportant une membrane obtenue par la mise en oeuvre dudit procédé
FR2600936A1 (fr) * 1986-07-07 1988-01-08 Cofim Procede et dispositif pour la realisation de preformes pour pieces en materiaux composites
FR2603842A1 (fr) * 1986-09-17 1988-03-18 Bronzavia Air Equipement Procede de realisation de pieces en materiaux composites, dispositif pour sa mise en oeuvre et pieces obtenues par la mise en oeuvre de ce procede
US4850391A (en) * 1987-01-27 1989-07-25 Mensor Corporation Flow control valve
US4857048A (en) * 1987-05-29 1989-08-15 Hewlett-Packard Company IV pump and disposable flow chamber with flow control
US5138936A (en) * 1990-01-01 1992-08-18 Elie Kent Unlimited amplitude rolling piston
WO1991017035A1 (en) * 1990-04-30 1991-11-14 Ontario Die Company Of America Method and apparatus for producing structural injection moldings
US5182065A (en) * 1990-04-30 1993-01-26 Ontario Die Company Limited Method for producing structural injection molded parts using lost motion movement between a mold and surrounding cutting blade
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