US2642091A - Elastic diaphragm - Google Patents

Elastic diaphragm Download PDF

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Publication number
US2642091A
US2642091A US792771A US79277147A US2642091A US 2642091 A US2642091 A US 2642091A US 792771 A US792771 A US 792771A US 79277147 A US79277147 A US 79277147A US 2642091 A US2642091 A US 2642091A
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Prior art keywords
diaphragm
threads
fluid
pressure
elastic
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Expired - Lifetime
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US792771A
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English (en)
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Morin Alexandre Henri
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • 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
    • F16J3/04—Bellows
    • F16J3/041—Non-metallic bellows
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
    • G01L7/082—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type construction or mounting of diaphragms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
    • G01L7/084—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type with mechanical transmitting or indicating means

Definitions

  • the diaphragms already' known and used. have generally a corrugated wall asv an accordionpleated bellows cf metal vor of any elastiesub'- stance enclosing often threads or fabric.
  • deformations are obtained through straightening of the threads.
  • deformations are obtained through a variation of curvature of the walls or of the corrugated surfaces and a straightening of 'the metal.
  • One object of my present invention is to provide an elastic diaphragm which is free of this inconvenience and is capable of working with large stresses, although having-small dimensions and leading consequently to 'devices of moderate volumes.
  • Figure 1 is a diagrammatic representation illustrating the principles ofthe present invention
  • Fig. 2 is a diagrammatic perspective view representing a further stageof thepresent invention
  • Fig. 3 is a longitudinal sectionalview of one embodiment of the present invention.
  • Fig. 4 is a similar longitudinal sectional view showing another embodiment ofA the present invention.
  • Fig. 5 is a transverse sectional view of the structure shown in Fig. 3;.
  • FIG. 6 is a longitudinal sectional view of a modied form of the invention.
  • Fig. '7 is a transverse sectional view of the structure shown in Fig. 6;
  • Fig. 8 is a diagrammatic perspective view of the thread-like elements of one embodiment of the present invention.
  • Fig. 9 is a similar diagrammatic perspective view showing a modied arrangement of the thread-like elements of the present invention.
  • Fig. .10 is a Vlongitudinal sectional View of one 6 Claims. (Cl. 137-793) form of diaphragm constructed in accordance -with the present invention
  • Fig. 11 is a similar view of a modiedformjof a diaphragm
  • Fig. 12' is a fragmentary sectional view ofi a diaphragm constructed in accordance with the f present invention.
  • Fig; 13 is a diagrammatic representation oi showing a. further step in the formation of the diaphragm
  • Fig. 15 is a longitudinal sectional viewy of the device of the present invention showingthe connection between the diaphragm and the rigid members; f
  • Fig. 16 is asimilar view showing modified forms.
  • Fig. 17 is a longitudinal sectional view of a de vice constructed according tothe present invention for actuating the lever; v l
  • Fig. 18 is a longitudinal sectional view of ay device embodying the principles of the ⁇ present invention applied to a valve;
  • Fig. '19 is a transverse sectional Viewk of the device of Fig. 21;
  • Fig. 20 isa similar transverse sectional View of ⁇ a modied form of device
  • Fig. 21 is alongitudinal sectional view showing a modied form of the present invention applied to a valve.r Y
  • a certainnumber ot threads a forming one or several networks; are fastened to the pieces A and B on which each or them exerts a pull under the actionof elementary forces such as P; they will tend to'draw the pieces A. and B towards each other.
  • a fluid-tight lm b made of any elastic substance such as rubber for example, the wall thus made in the shape of a sleeve can be subjected to the pressure of any fluid either on the inner or on the outer side of the sleeve or simultaneously on both sides of the wall.
  • diaphragm I is composed of threads a covered with one or several fluid-tight elastic films b forming a sleeve. Threads u and nlm b are fastened to rigid members in the form of plates A and B by any suitable means ensuring uid-tightness, for example by means of semi-circular clamps 2 and 2 screwed up by means of screws 3.
  • the plate B is solid whereas the plate A is provided with an orifice 8 through which any fluid under pressure can be introduced.
  • the fluid exerts a thrust F on each of the plates A and B which tend to be driven apart from each other.
  • the inner side of the diaphragm is subjected to a pressure which compels each thread to take a tension T.
  • the resultant of all the tensions T of the threads applied to the plates A and B is on each plate a force U. These equal and opposite forces U tend to bring plates A and B nearer.
  • this force is limited only by the breaking of the threads and that, by increasing the number of the threads it is always possible to increase the force without altering the inner pressure of the fluid. If, for instance, the plate A is fastened to the frame of a machine 5, the plate B tted with a rod 1 will be able to exert a pull on this rod and to cause -a certain displacement of this rod. This result can be used for producing any motion or effort.
  • the diaphragm I consisting of the threads a and the film b is fastened, as explained before, to the plates A and B and put inside a vessel to which the plate A is fixed.
  • This vessel 5 receives through thetician 9 a uid under pressure which acts on the outer side of the diaphragm I which becomes deformed through a reduction of its dameter in its central part.
  • Plate B is drawn nearer to plate A, which causes the displacement of a rod 'I fastened to plate B and sliding through the orifice 8 of plate A.
  • the working of the apparatus represented in Figs. 6 and 7 is as follows: under the action of a fluid under pressure introduced between the diaphragms, the threads of these diaphragms are tightened and if the sleeves of these diaphragms were originally cylindrical, the deformation of the diaphragms would cause the plates A and B to come closer to each other.
  • the diameter of the outer diaphragm I grows wider in the middle while the'diameter of the diaphragm i becomes smaller in the central part.
  • FIGS 3, 9, 10, l1 and l2 clearly show how this diaphragm can -be made up of networks of threads linked together and covered with an elastic, fluid-tight wall or lm.
  • Figures 8 and 9 show, for clearness sake, only three of the threads a of the network forming t'he surface s. If the surfaces s are cylinders of revolution with an axis XX', in the case of Figure 8 the threads a are rectilinear and in the case of Figure 9 the threads a are helixes with a constant pitch. If there are several nets of helically wound threads, it is advantageous to give these helixes opposite pitches: some arev right-pitched, others left-pitched. Several sets x of threads can be laid in a concentric manner.
  • the threads or cables of the diaphragm can be made of any substance, for example, cotton, rayon, asbestos or steel. The latter substance is particularly useful when it is desired to build smallV sized diaphragms capable of transmitting relatively high forces or when it is desired to use a substance having a small elongation.
  • the film ensuring fluid-tightness and a connection between the threads can be made of any elastic .the threads of the; diaphragm
  • a networlr'of threads t hasbeen represented whose ends are turneddown, like hooks, around the rings t and t which can be metallic or made oiany substance.
  • the fluid.- tight and elastic sheets b and b ensure fluid.- tightness and can be turned down with the threads around the rings tand t.
  • Figure I6 representstwo other modes. of hiring thediaphragm..y
  • the rings and B. can .be bonded tofrthe-:wallfof thev ends ofthe diaphragm- This adherenceito'. a metallic ring can bev directly achieved. during; vulcanisation, in the case of a rubber diaphragm.
  • the other mode oi fastening consistsin: ⁇ Wideningout the end of theV elastic diaphragm and ⁇ in pressing it against the ring A byz meansof. a washer r locked by the nut c screwed. on ring A (0r B).
  • the diaphragm of the present invention ⁇ can beused to replace any diaphragm Whatever or In'the case of Fig. 1l the consruction with hooking rings t and t' is exactly the same, ⁇ but the threads and elastic sheets. are so. arranged as toclose up one of the ends.
  • the diaphragm is inthe shape of a sack.
  • the sack.- shaped disposition can be :worked outwithor without the rings t and, t' embedded inthe elastic mass, the rings being replaced by inner or outer framings..
  • the diaphragm is a part of a cylinder of revolution which is obtained by rolling for" in-Y stance a sheet of threads covered with rubber sheets'or with any vother elastic substance around a cylinder serving as a support during they makingof the diaphragm.
  • Figures 13 and 14 clearly show, as an example, how these diaphragme can threads are to takethe shape oi a cylindrical helix.
  • a metall-ic tube d of an appropriate diameter a parallelogram-shaped piece ci fabric g made upv of a set oi threads or cables @laid side by side and covered on both sides rwith a sheet of elastic substance, for example,rubber.v endfof the rolling the two opposite edges of the fabric butt against each other Without overlap'- ping, the edges of the guni-sheetsean havea. joint t in thin gum ensuring sealing.
  • This cylindrical tube d can serve as a support to the diaphragm during the vulcanisation if the sheets of elastic substance covering the threads are of. rubber. I Inthe case of the threads being 5.,;
  • the fabric g is in theshape of a rectangle.
  • the rising of the .diaphragm to the .end .plates can be ensured by means of clamps inseveral or split clampsinone part.
  • the ring -lt holds the enlarged end of the diaphragm by. pressing on the bicon-ical ring .hf split in several pieces.
  • the plate A. fixed. to one end of the. diaphragm I is. pivotally mounted on the frame 5 by means ofthe pin. I2.
  • the other end isl fixed to the platev B to which the end of the leverl I0 is pivoted at I3.
  • a helical spring Ill bears on the'platesv A and. B which are kept in alignment by their telesc'oping parts 'I and I in the form of rectilinear, hollow rods.
  • the fluid under pressure is introduced through the orifices 8,A 8 and.
  • the size and shape of the diaphragm can. be selected in such a Waythat when the pressure of the fluid increases, the lever Ill/turnsv forinstance. in the direction of the arrow EI. When thepressure decreases, the spring pushes back -thelever I0l in the direction of the arrow F2. In other words, it is possible to give theglever' I Il a reciprocating motion.
  • V Figures 18 and 21 showA how it is possible to produce the opening. or'the shutting of a valve I5 relative toits conical seat I5'.
  • aguided rod. 1 is. fastened at one. end to the valve I5, and at the other end. to the plate B, which plate, in its turn, is fixed to the diaphragm
  • Thev plateA which is. fixed to the .other end oi the vdiaphragm is fastened to the support 5 by'meansofsti'ff 1ro-dst.
  • a helicalspring Ie rests onthe: platesLA. and B. When the pressure oi the huid'.
  • Fig. 'a section similar -to that of Fig. 19 shows the diaphragms I when they are not concentric but arranged side by side, on the plate B and on parallel lines. These diaphragms can be arranged so that the increase of pressure causes the valve to shut rather than to open.
  • This diaphragm enables the valve or the movable element of a valve of any diameter to be remotely controlled by means of a small valve controlling the admission and the discharge ofthe fluid acting on the diaphragm.
  • this diaphragm is particularly useful to replace the plane, conical or domeshaped diaphragms which are commonly used on certain valves.
  • this diaphragm is all the more sensitive and effective as its shape approaches that of a cylinder of revolution. This property can be utilized when it is desired to control automatically the expansion of the discharge of any fluid 'through a valve., the diaphragm serving as a driving member for controlling this expansion.
  • this diaphragm can be used in pumps to replace plane or dome-shaped diaphragms, or to replace pistons.
  • the stretching of the central part or the diaphragm can be utilised to apply this central part against one or several orifices Vwhich can be closed by the wall of the diaphragm, In such cases the diaphragm is then directly used as a valve member.
  • a device for producing displacements through pressure-variations in a fluid comprising a nxed rigid member, a second rigid member movable with respect to said'iixed member, iiexl ible, substantially inextensible thread-likeelements and an elastic fluid-tight sleeve-like enclosure extending lengthwise of, and surrounding the thread-like elements in juxtaposed concentric relationship, said thread-like elementsbeing connected throughout their length with said sleeve-like enclosure, the ⁇ respective ends of said thread-like elements and said sleeve-like enclosure being stretched between, and attached to said respective rigid members, one of said rigid members having a duct communicating with the interior of the enclosure for Varying the pressure of fluid therein, whereby said movable member will be displaced as a result of the variations in effective length of said thread-like elements due to the flexure thereof in response to pressure variations in the fluid Within said enclosure.
  • a pressure-responsive device comprising a fixed rigid member, a second rigid member movable with respect to said xed member, flexible, substantially inextensible thread-like elements, an elastic fluid-tight sleeve-like enclosure extending lengthwise of and surrounding the thread-like elements in juxtaposed concentric relationship, said thread-like elements being connected throughout their lengthwith said sleevelike enclosure,A the respective ends of said elements and said enclosure being stretched between and attached to said respective rigid members, said iixed member having intake means therein for delivering pressure-fluid into said enclosure, whereby the movable member will move in response to variations in the eifective length of said elements resulting from flexure thereof in response to pressure-variations in the fluid in said enclosure.
  • a pressure-responsive device of the type described comprising a fixed rigid member, a second rigid member movable with respect to said fixed member, flexible, substantially inextensible thread-like elements, an elastic sleeve-like means extending longitudinally of said elements and surrounding the thread-like elements in closely juxtaposed concentric relationship therewith, said thread-like elements being connected throughout their length with said sleeve-like means, the respective ends of said elements and said means being stretched between and attached to said rigid members, said fixed member hav- .ing an accident communicating with the interior of said sleeve-like means and a vessel surrounding the sleeve-like means and provided with a pressure-fluid orifice for varying the pressure Within said vessel about the exterior of said elastic sleeve-like means, whereby said movable member will move in response to variations in the effective length of said threads as a result of their flexing in response to pressure variations in the fluid on the exterior of the sleeve-like means.
  • a pressure-responsive device comprising a nxed rigid member, a second rigid member movable with respect to said fixed member, two coaxial structures each comprising flexible, substantially inextensible thread-like elements and an elastic fluid-tight sleeve longitudinally coextensive and contiguous therewith, said thread- Vlike elements being connected throughout their length with said sleeve, the respective ends of said threads and of said related sleeve being stretched between and attached to said rigid members, said Xed member having a pressureiiuid intake into the space deiined between said sleeves, whereby said movable member will move 1n response to the flexure-variations in said horrads as a result of pressure-variations in said 5,
  • A'pressure-responsive device comprising a fixed rlgid member, a second rigid member movable With respect to said xed member, iiexible, substantially inextensible threads arranged along Vthe generatrices of a cylindrical surface and
  • Apressure-responsive device comprising a xed r1g1d member, a second rigid member movable with respect to said fixed member flexible substantially inextensible helically-extending thread-like elements and a cylindrical-elastic sleeve contiguously coextensive with and'concentrically surrounding said threads, said threadlike elements being connected throughout their length with said sleeve, the respective ends of ⁇ said threads and saidv sleeve being stretched loetween and attached to said rigid members, said xed member having a pressure-fluid inlet into the interior of said sleeve whereby the movable member Will move in response to variations in effective length of said threads resulting kfrom exure variations therein in response to pressure variations in said iiuid.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Diaphragms And Bellows (AREA)
US792771A 1947-01-03 1947-12-19 Elastic diaphragm Expired - Lifetime US2642091A (en)

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FR1003449T 1947-01-03

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GB (1) GB674031A (fr)

Cited By (34)

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US2789580A (en) * 1953-11-18 1957-04-23 Standard Thomson Corp Mechanical transducer with expansible cavity
US2844126A (en) * 1955-01-20 1958-07-22 Clevite Corp Fluid actuated motor system and stroking device
DE1115437B (de) * 1957-03-02 1961-10-19 Dunlop Rubber Co Verfahren zum Herstellen biegsamer, ringfoermiger Membranen aus einem Gummikoerper, der durch wenigstens zwei Kordeinlagen ausgesteift ist
DE1117857B (de) * 1956-12-11 1961-11-23 Firestone Tire & Rubber Co Verfahren und Einrichtung zum Formen und Vulkanisieren eines balgartigen Rohlings, insbesondere fuer Luftfedern
DE1124678B (de) * 1958-08-04 1962-03-01 Us Rubber Co Verfahren zum Herstellen von Membranen fuer hydraulische Federn od. dgl.
US3058341A (en) * 1958-03-20 1962-10-16 Bochumer Ges Fur Grubenausbau Force measuring device for determining the stresses upon the frameworks in underground excavations and the like
DE1167012B (de) * 1957-06-19 1964-04-02 Gen Motors Corp Verfahren und Vorrichtung zum Herstellen eines Druckbalgs
DE1176353B (de) * 1959-01-12 1964-08-20 Us Rubber Co Verfahren und Vorrichtung zur Herstellung von Membranen fuer Federungen
US3180146A (en) * 1963-03-12 1965-04-27 Simmonds Precision Products Method of gaging and expelling fluids under zero gravity conditions
DE1234009B (de) * 1963-10-07 1967-02-09 Henri Dubois Rohrfoermiger Koerper fuer eine Angelrute und Verfahren zu seiner Herstellung
DE1240265B (de) * 1960-01-19 1967-05-11 Dunlop Rubber Co Verfahren und Vorrichtung zur Herstellung eines Rohlings fuer Federbaelge
US3481254A (en) * 1967-08-14 1969-12-02 United Aircraft Corp Composite structure
US3638536A (en) * 1969-07-23 1972-02-01 Hans Kleinwachter Device with a pressurizable variable capacity chamber for transforming a fluid pressure into a motion
US3913461A (en) * 1973-07-27 1975-10-21 Stephen H Latawic Fluid reaction device having an undulatory flexible wall
US3924519A (en) * 1968-08-21 1975-12-09 Goodrich Co B F Actuator
US4108050A (en) * 1974-08-14 1978-08-22 Paynter Henry M Fluid-driven torsional operators for turning rotary valves and the like
US4502280A (en) * 1982-04-01 1985-03-05 Mccoy Walter T Hydraulic applications
EP0208332A3 (fr) * 1985-07-12 1987-05-06 Henry M. Paynter Servomoteur à traction actionné par fluide sous haute pression et procédé de fabrication
US4721030A (en) * 1985-07-16 1988-01-26 Paynter Henry M Hyperboloid of revolution fluid-driven tension actuators and method of making
US4733603A (en) * 1983-11-21 1988-03-29 Mirko Kukolj Axially contractable actuator
US4819547A (en) * 1988-03-28 1989-04-11 Mirko Kukolj Axially contractable actuator
US4841845A (en) * 1986-09-22 1989-06-27 Theophile Beullens Hydraulic or pneumatic drive device
US4915017A (en) * 1987-10-26 1990-04-10 D. F. Laboratories Ltd. Diaphragm and a diaphragm-actuated fluid-transfer control device
US5111848A (en) * 1987-03-19 1992-05-12 Fuji Photo Film Co., Ltd. Apparatus for preventing pulsations in a flowing fluid
DE10017104A1 (de) * 2000-04-06 2001-10-11 Univ Ilmenau Tech Fluidmechanisches Antriebselement
US20040206049A1 (en) * 2003-02-17 2004-10-21 Toyo Jidoki Co., Ltd. Bag sealing apparatus
US20110023474A1 (en) * 2008-04-02 2011-02-03 Squse Inc. Rotation device
US20110079140A1 (en) * 2009-10-05 2011-04-07 Robert Bosch Gmbh Energy storage system including an expandable accumulator and reservoir assembly
US8701398B2 (en) 2012-03-20 2014-04-22 Robert Bosch Gmbh Strain energy accumulator
US9440361B1 (en) * 2013-06-28 2016-09-13 Daniel Theobald Activation element and method
US10132336B1 (en) 2013-04-22 2018-11-20 Vecna Technologies, Inc. Actuator for rotating members
US10280951B2 (en) 2014-03-02 2019-05-07 Drexel University Articulating devices
EP3008537B1 (fr) * 2013-06-12 2021-08-04 Belimo Holding AG Insert de compensation de pression
US11628560B2 (en) 2017-03-22 2023-04-18 President And Fellows Of Harvard College Programmable multi-scale fluidic artificial muscles and pistons

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US3645173A (en) * 1969-10-20 1972-02-29 Trish Energetics Inc Fluid actuator
US3618638A (en) * 1970-06-01 1971-11-09 Trish Energetics Inc Pneumatic control apparatus
US3967809A (en) * 1974-10-03 1976-07-06 Skantar Michael J Linear fluidic actuator
FR2559873B1 (fr) * 1984-02-17 1986-11-14 Trouvay Cauvin Robinet motorise a fluide
GB2165051B (en) * 1984-09-28 1989-01-11 Pm Insitu Tech Limited Improved pressure meter
DE3523717A1 (de) * 1985-07-03 1987-01-15 Daimler Berthold H Dr Dehnzylinder mit elastisch veraenderbarer laenge
DE3506707A1 (de) * 1985-02-26 1985-11-07 Rudolf M. 8411 Lorenzen Schachtner Hydro-pneumatischer kraftwandler
DE102005038166A1 (de) * 2005-08-12 2007-02-15 Bälz, Helmut Ventil mit neuem Antrieb

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US39238A (en) * 1863-07-14 Improvement in the manufacture of elastic hose or tubing
US88887A (en) * 1869-04-13 Improved rubber hose or tubing
US1057196A (en) * 1911-05-05 1913-03-25 Wilkins Valve Company Diaphragm.
US2088042A (en) * 1930-01-18 1937-07-27 Abercrombie Pump Company Pumping member
US2178953A (en) * 1937-10-16 1939-11-07 Wright Aeronautical Corp Hydraulic plunger seal
US2291912A (en) * 1940-04-08 1942-08-04 Cornelius W Meyers Pumping apparatus
US2323985A (en) * 1941-03-17 1943-07-13 Arthur J Fausek Diaphragm
US2372923A (en) * 1942-07-07 1945-04-03 Ingersoll Rand Co Load-controlling apparatus for compressors
US2387486A (en) * 1944-08-15 1945-10-23 Zellos Andrew Bellows

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US39238A (en) * 1863-07-14 Improvement in the manufacture of elastic hose or tubing
US88887A (en) * 1869-04-13 Improved rubber hose or tubing
US1057196A (en) * 1911-05-05 1913-03-25 Wilkins Valve Company Diaphragm.
US2088042A (en) * 1930-01-18 1937-07-27 Abercrombie Pump Company Pumping member
US2178953A (en) * 1937-10-16 1939-11-07 Wright Aeronautical Corp Hydraulic plunger seal
US2291912A (en) * 1940-04-08 1942-08-04 Cornelius W Meyers Pumping apparatus
US2323985A (en) * 1941-03-17 1943-07-13 Arthur J Fausek Diaphragm
US2372923A (en) * 1942-07-07 1945-04-03 Ingersoll Rand Co Load-controlling apparatus for compressors
US2387486A (en) * 1944-08-15 1945-10-23 Zellos Andrew Bellows

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789580A (en) * 1953-11-18 1957-04-23 Standard Thomson Corp Mechanical transducer with expansible cavity
US2844126A (en) * 1955-01-20 1958-07-22 Clevite Corp Fluid actuated motor system and stroking device
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Also Published As

Publication number Publication date
FR1003449A (fr) 1952-03-18
GB674031A (en) 1952-06-18

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