US3360009A - Hydraulic fluid accumulator having separating wall tensioner - Google Patents

Hydraulic fluid accumulator having separating wall tensioner Download PDF

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Publication number
US3360009A
US3360009A US469162A US46916265A US3360009A US 3360009 A US3360009 A US 3360009A US 469162 A US469162 A US 469162A US 46916265 A US46916265 A US 46916265A US 3360009 A US3360009 A US 3360009A
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United States
Prior art keywords
housing
closure
hydraulic
wall
separating wall
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US469162A
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English (en)
Inventor
Elmer Adam
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Hydraulik GmbH
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Hydraulik GmbH
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Priority to BE684725D priority Critical patent/BE684725A/fr
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Publication of US3360009A publication Critical patent/US3360009A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/18—Anti-extrusion means
    • F15B1/20—Anti-extrusion means fixed to the separating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/43—Anti-extrusion means
    • F15B2201/435—Anti-extrusion means being fixed to the separating means

Definitions

  • a hydraulic fluid accumulator includes a cylindrical housing and a cylindrical member or separating wall member having straight cylinder-forming walls.
  • the cylinder member is clamped at one end to the housing and is provided with closure means at the other end which exert a weight on this end to maintain the member in a stretched condition.
  • closure means for the end of the cylinder member which divides the interior of the housing into a gas chamber on the interior of the member and a hydraulic fluid chamber on the exterior, is constructed of a material having suflicient weight to urge the interior member downwardly in a stretched condition even when fluid is present in the chamber on the exterior of the cylinder member.
  • the closure member is of a weight which is at least great enough to overcome any lifting force exerted by the fluid even when the member is in a normal or unstretched condition.
  • This invention relates in general to the construction of accumulators, and in particular to a new and useful hydraulic accumulator of cylindrical configuration having a resilient gap cushion enclosed in an elastic member.
  • One of the first types of hydraulic accumulators employed comprises a pressure tank which was widely employed with a piston pump. Usually this was a long cylindrical vessel arranged in a vertical position. The pressure of the upwardly pumped fluid compressed the air enclosed in the vessel which then exerted an equalizing effect on the pressure thrust of the pistons of the pump. Inasmuch as such water conveying pumps usually had to handle only pressure differences of three to four atmospheres, the fusion of the air into the fluid in the pressure tanks was of secondary importance and it was possible to do so Without a separation of the air cushion from the pump fluid. In the field of oil hydraulics, however, this is no longer possible in view of the high pressures employed. Too much gas would be lost since the oil is very absorbent and the fusion increases with increasing pressure. For this reason the gas cushion is separated from the pressure oil in all high pressure hydraulic accumulators.
  • a flexible separating wall of oilproof rubber follows practically without inertia the pressure thrust of the oil and provides satisfactory separation of the gas cushion from the oil.
  • a cylindrical vessel for the original pressure tank it is preferable to provide a separating wall which is of cylindrical shape.
  • a long cylindrical and verti- 3,360,009 Patented Dec. 26, 1967 cally installed bag made of a resilient material for separating the two fluids will buckle and wrinkle and will result in a premature leakage due to the swinging movements of the wall.
  • the cylindrical shape has been abandoned in'favor of a spherical shape.
  • a rubber diaphragm arranged in the medium plane of the spherical bag is less inclined to buckle and wrinkle than a long cylindrical bag.
  • the spherical housing is less advantageous than the cylindrically shaped one in regard to the stability.
  • a spherical bag is more expensive to manufacture than a long cylinder which may be made from commercially available tubes.
  • Some manufacturers of cylindrical hydraulic accumulators recommend the installation of their accumulators in a horizontal position in view of the buckling of the bag. This, however, only decreases the inclination to buckle and wrinkle but does not eliminate it, and this is particularly true with regard to wrinkling.
  • the separating wall is made with means for preventing the buckling andwrinkling thereof which in one embodiment includes a bevel-shaped separating wall arranged at the lower end of the elastic separating element and forming a heavy metal closure.
  • the closure is of a weight such that it will overcome the upward pressure of the oil and urge the separating wall downwardly into the oil.
  • the closure means is formed so as to prevent the formation of wrinkles.
  • it advantageously includes two parts, one of which causes the rounding out of the lower portion of the separating wall and the other of which is angleddownwardly so that it may fill a discharge opening formed at the bottom end of the accumulator.
  • the closure forms an anchoring means for a tension spring which is anchored in the discharge or entrance opening for the hydraulic fluid and tensions the elastic wall so that it extends downwardly into the fluid at all times, even if it is installed horizontally.
  • a further object of the invention is to provide an accumulator construction which includes a cylinder having a separating wall which is anchored by means extending downwardly into the cylinder from the upper end thereof and which includes a closure for the separating wall arranged centrally in respect to the lower end and engaging and holding the lower end in a weighted fashion.
  • a further object of the invention is to provide means for biasing a separating wall downwardly into the hydraulic fluid of an accumulator.
  • a further object of the invention is to provide an accumulator which is simple in design, rugged in construction and economical to manufacture.
  • FIG. 1 is a transverse sectional view of a hydraulic accumulator construted in accordance with the invention without the gas and oil contents therein;
  • FIG. 2 is a view similar to FIG. 1 with the gas contents in the gas chamber portion but without oil pressure;
  • FIG. 3 is a view similar to FIG. 1 of the accumulator with the gas within the gas chamber and with full oil pressure of the hydraulic system;
  • FIG. 4 is a view similar to FIG. 1 of another embodiment of the invention.
  • FIG. 5 is a schematic indication of the forces acting on the closure wall.
  • an accumulator generally designated 20 which includes a tubular housing or container 5 having an outlet fitting 3 at one end with a small size opening 22 and being closed at its opposite end with a lid or cover member 6 which is bolted in position by means of bolts 24.
  • a gas chamber 24 is defined by an elastic bag member or cylindrical separating wall 4.
  • the separating wall 4 is advantageously made of rubber tubing or other elastic material and is secured in position in accordance with the invention by the cover or flange lid 6.
  • the lid 6 made to reach deeply into the interior of the cylinder 5, for example, by a depth equal to from one half to three quarters of the diameter of the cylinder 5.
  • the interior of the flange lid 6 is advantageously concentrically rounded to provide a backing curvature to insure that there will be no formation of wrinkles on the elastic separating wall 4 even when the latter has lost its stability of form, for example because of the increased pressure of the hydraulic fluid as indicated in FIG. 3.
  • the flange lid 6 also carries a gas filling valve 7 which is centrally located in the flange lid.
  • the large size opening at the top of the cylinder 5 which is closed by the flange lid 6 permits the easy exchange of the separating wall 4 in the event the latter has been damaged such as by unsuitable hydraulic fluid or by faulty handling or it has reached the end of its normal operating life span.
  • the separating wall 4 is biased to an extended position by means of a centralized holding member or closure generally designated 28 which includes a lower part or conical-shaped part 1 and a flat plate rounded part 2 which is secured thereto as by means of a bolt 29.
  • the bolt 29 extends from the lower part 1 through an opening in the rounded part 2 and is secured by means of a nut 30.
  • the parts 1 and 2 together define an annular groove 34 at their mating end faces which provides a seat for a widened bead or end portion 4a of the separating wall 4.
  • the flat plate part 2 is rounded on the sides and on its upper portion in order to provide a rounded backing for the separating wall 4 which prevents the formation of wrinkles in the wall even when subjected to high pressure as indicated in FIG. 3.
  • the lower part 1 is advantageously made with a projecting portion which can be centered in the opening 22 and which is advantageously of a configuration complementary to the curvature 3a of the interior of the fitting 3. As indicated in FIG. 2, the lower part 1 closes the opening 22 when the oil is drained out of the cylinder 5 due to a drop in pressure of the oil.
  • the cylindrical separating wall is suspended in its manufactured shape and without expansion in the tube 5. It expands only when filled with gas and then fills the entire interior of the hydraulic accumulator when the pressure in the hydraulic system is low, as indicated in FIG. 2.
  • the separating wall is compressed by the pressure of the hydraulic oil 36 and it loses its expansion as soon as the pressure of the oil has compressed the separating wall to its original size. If the pressure of the oil is further increased, the flexible separating wall 4 loses its stability of form and the walls will be bent inwardly (as indicated in FIG. 3) around the rounded projection of the interior flange lid 6 and around the rounded plate 2.
  • the flexible separating wall is not only subject to the pressure of the oil originating from the pumping operation, but it is also effected by an upward pressure which results from the gravity of the oil which forces the wall 4 upwardly.
  • This upward pressure is independent from the oil pressure and has an effect similar to that of submerging a slack, bag-like element in an oil container under atmospheric conditions.
  • the upward pressure causes the buckling and wrinkling of the container 4 without the provision of the construction of the invention.
  • the buckling and wrinkling is counteracted by the closure 28 as well as by the walls 6 of the lid.
  • the closure 28 is of a weight such as to overcome the upward pressure of the oil and to urge the wall downwardly into the oil.
  • the closure 28 is formed so as to prevent the formation of wrinkles in the separating wall 4.
  • a closure member which provides means for urging the wall 4' to an extended position by itself or in combination with a closure member generally designated 28' which is secured to the ends of the separating wall 4 in the manner of the other embodiment.
  • the spring 9 in the embodiment illustrated in FIG. 4 supplements the weight of the parts 1 and 2 of the closure member generally designated 28'.
  • the force A is a force of gravity of the separating wall 4 and its closure means 28'.
  • B is the upward pressure of the fluid acting on these parts, and C is the force of the spring 9.
  • the Weight of the parts 1 and 2' may be determined so as to compensate for all practical purposes for the upward pressure of the separating wall 4 and its closure parts 23' in a horizontal installation of the accumulator 20.
  • the spring 9 is tensioned by coiling it around a spring holder 10 which is provided with a spiral groove on its exterior surface.
  • the holder 10 may be pulled outwardly by means of a suitable tool through the bottle neck formed by the closure fitting 3 and a snap ring 1-1 is inserted into a larger diameter portion 40 of the fitting and engaged in an exterior groove of the holder 10 and wedged against the ledge formation 42 and the fitting 3'. In this position the snap ring 11 tightly clamps the holder in position with the spring 9 under tension. A troublefree inflow and outflow of the fluid through the tube inlet opening 22 will be possible.
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end and terminating on the interior of said housing at its inner end, a closure lid closing said first end ofsaid housing and said member, and wall closure means engaged with the inner end of said member and biasing the periphery thereof toward the hydraulic opening, said closure means being of a weight to exert a downward stretching force on said member at least always greater than the lifting action of the hydraulic fluid to urge said cylinder wall to maintain its straight form without collapse.
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end and terminating on the interior of said housing at its inner end, a closure lid closing said first end of said housing and said member, and closure means engaged with the inner end of said member and biasing the periphery thereof toward said hydraulic opening, including spring means aiding in biasing said separating wall in a direction away from said closure lid toward said opening, and of a force to exert said closure means being of a weight to exert a downward stretching force on said member at least always greater than the lifting action of the hydraulic fluid to urge said cylinder wall to maintain its straight form without collapse.
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end and terminating on the interior of said housing at its inner end, a closure lid closing said first end of said housing and said member, and closure means engaged with the inner end of said member and biasing the periphery thereof toward said hydraulic opening, including a coil spring connected to said separating wall and biasing said separating wall in a direction away from said closure lid toward said opening and of a force to exert said closure means being of a weight to exert a downward stretching force on said member at least always greater than the lifting action of the hydraulic fluid to urge said cylinder wall to maintain its straight form without collapse, and holder means anchoring said coil spring under tension adjacent said hydraulic discharge opening.
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end and terminating on the interior of said housing at its inner end, a closure lid closing said first end of said housing and clamping said member to the housing around the periphery of said member, and closure means engaged with the inner end of said member and clamping the periphery thereof at a location in alignment with and opposite the hydraulic opening, said member closure means together with said member and said closure lid defining a separate gas chamber within said member and a fluid chamber between said member and said housing, said closure means being of a weight to exert a downward force at least greater than the lifting action of the hydraulic fluid in said cylinder forming a straight wall to urge it to maintain its straight form without collapse.
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end, a closure lid closing said first end of said housing and said member and clamping said member to the housing around the periphery of said housing and said separating wall, and member closure means engaged with the inner end of said cylindrical and clamping the periphery thereof at a location in alignment with and opposite the hydraulic opening, said member defining a separate gas chamber within said housing on its interior and a hydraulic fluid chamber on its exterior, said closure lid comprising a first substantially conical part adapted to fit into the hydraulic opening to close the same upon reduction of hydraulic pressure and a second plate part having curved sides and top portions for forming the separating wall into a curved configuration upon increase of hydraulic pressure, said closure means being of a weight to exert a downward force at least greater than the lifting action of the hydraulic fluid and acting
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a cylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end, a closure lid closing said first end of said housing and clamping said member to the housing around the periphery of said housing and said member and terminating on the interior of said housing at its inner end, and closure means engaged with the inner end of said memher and clamping the periphery thereof at a location in alignment with and opposite the hydraulic opening, said closure means together with said member and said closure lid defining a separate gas chamber within said housing, said closure lid comprising a first substantially conical part adapted to fit into the hydraulic opening to close the same upon reduction of hydraulic pressure and a second plate part having curved sides and top portions for forming the separating wall into a curved configuration upon increase of hydraulic pressure, said closure means being of a weight and construction to urge said separating wall to extend into the hydraulic
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, a substantially tubular resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end, a closure lid closing said first end of said housing and clamping said member to the housing around the periphery, of said housing and said member, closure means engaged with the inner end of said member and clamping the periphery-thereof at a location in alignment with and opposite the hydraulic opening, said closure means together with said member and said closure lid defining a separate gas chamber within said housing, said closure means comprising a first part and a second plate part having curved sides and top portions for forming the member into a curved configuration upon increase of hydraulic pressure, and a spring means biasing said closure wall in a direction away from said closure lid toward said opening, and of a force to exert said closure means being of a weight to exert a downward stretching force on said member at least always greater than the
  • a hydraulic fluid accumulator comprising a cylindrical housing having a first end and a second end with means at said second end defining a fitting with a hydraulic opening therein, acylindrical resilient separating member having a straight cylinder forming wall, said member extending into said housing from said first end, a closure lid closing said first end of said housing and clamping said member to the housing around the periphery of said housing and said member, and closure means engaged with the inner end of said member and clamping the periphery thereof at a location in alignment with and opposite the hydraulic opening, said closure means together with said member and said closure lid defining a separate gas chamber within said housing, said closure lid comprising a first substantially conical part adapted to fit into the hydraulic opening to close the same upon reduction of hydraulic pressure and a second plate part having curved sides and top portions for forming the separating wall into a curved configuration upon increase of hydraulic pressure, said closure means including a coil spring biasing said closure wall in a direction away from said closure lid toward said opening including a coil spring connected to said closure

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Closures For Containers (AREA)
  • Safety Valves (AREA)
US469162A 1964-07-03 1965-07-02 Hydraulic fluid accumulator having separating wall tensioner Expired - Lifetime US3360009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE684725D BE684725A (xx) 1964-07-03 1966-07-28

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEE27336A DE1295935B (de) 1964-07-03 1964-07-03 Hydrospeicher
DEE0027643 1964-08-20

Publications (1)

Publication Number Publication Date
US3360009A true US3360009A (en) 1967-12-26

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US469162A Expired - Lifetime US3360009A (en) 1964-07-03 1965-07-02 Hydraulic fluid accumulator having separating wall tensioner

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US (1) US3360009A (xx)
AT (1) AT268888B (xx)
CH (1) CH446907A (xx)
DE (2) DE1295935B (xx)
GB (1) GB1108255A (xx)
LU (1) LU48969A1 (xx)
NL (1) NL6508338A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428091A (en) * 1965-12-28 1969-02-18 Kazuo Sugimura Accumulator
US4287916A (en) * 1978-09-05 1981-09-08 Kazuo Sugimura Semispherical shape valve device in bladder type accumulators
US20070181199A1 (en) * 2004-04-16 2007-08-09 Norbert Weber Hydraulic accumulator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD120620A1 (xx) * 1975-07-11 1976-06-20
DE3110153A1 (de) * 1980-03-28 1982-05-13 Berthold H. Dr. 5630 Remscheid Daimler Verfahren und vorrichtung zur speicherung von energie

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US2421076A (en) * 1942-09-04 1947-05-27 Bendix Aviat Corp Accumulator
US2546648A (en) * 1948-09-30 1951-03-27 Greer Hydraulics Inc Spring controlled guide rod for the oil port valve of an accumulator
US2604118A (en) * 1946-04-25 1952-07-22 Greer Hydraulics Inc Hydraulic accumulator
US2804884A (en) * 1954-08-16 1957-09-03 Hydril Co Accumulator whith diaphragm stabilizer
US2811925A (en) * 1954-02-24 1957-11-05 Exxon Research Engineering Co Device for transmitting pressure and pumping fluids
US3075558A (en) * 1959-09-24 1963-01-29 Forell Kenneth J Von Diaphragm type accumulator having means to prevent the diaphragm from folding and crimping on itself due to changes in pressure
US3139112A (en) * 1957-11-20 1964-06-30 Mercier Jean Pressure vessels
US3211348A (en) * 1964-05-21 1965-10-12 Greer Hydraulics Inc Pressure vessels

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895852C (de) * 1951-10-03 1953-11-05 Arnold Von Pohl Dipl Ing Druckkammer-Windkessel

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342356A (en) * 1938-09-13 1944-02-22 Mercier Jean Deformable or elastic accumulator
US2421076A (en) * 1942-09-04 1947-05-27 Bendix Aviat Corp Accumulator
US2604118A (en) * 1946-04-25 1952-07-22 Greer Hydraulics Inc Hydraulic accumulator
US2546648A (en) * 1948-09-30 1951-03-27 Greer Hydraulics Inc Spring controlled guide rod for the oil port valve of an accumulator
US2811925A (en) * 1954-02-24 1957-11-05 Exxon Research Engineering Co Device for transmitting pressure and pumping fluids
US2804884A (en) * 1954-08-16 1957-09-03 Hydril Co Accumulator whith diaphragm stabilizer
US3139112A (en) * 1957-11-20 1964-06-30 Mercier Jean Pressure vessels
US3075558A (en) * 1959-09-24 1963-01-29 Forell Kenneth J Von Diaphragm type accumulator having means to prevent the diaphragm from folding and crimping on itself due to changes in pressure
US3211348A (en) * 1964-05-21 1965-10-12 Greer Hydraulics Inc Pressure vessels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428091A (en) * 1965-12-28 1969-02-18 Kazuo Sugimura Accumulator
US4287916A (en) * 1978-09-05 1981-09-08 Kazuo Sugimura Semispherical shape valve device in bladder type accumulators
US20070181199A1 (en) * 2004-04-16 2007-08-09 Norbert Weber Hydraulic accumulator

Also Published As

Publication number Publication date
LU48969A1 (xx) 1965-10-18
NL6508338A (xx) 1966-01-04
DE1295935B (de) 1969-05-22
DE1450319A1 (de) 1969-01-23
DE1450319B2 (de) 1971-03-25
GB1108255A (en) 1968-04-03
CH446907A (de) 1967-11-15
AT268888B (de) 1969-02-25

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