CA1043996A - Pressure accumulator and method of forming same - Google Patents
Pressure accumulator and method of forming sameInfo
- Publication number
- CA1043996A CA1043996A CA245,330A CA245330A CA1043996A CA 1043996 A CA1043996 A CA 1043996A CA 245330 A CA245330 A CA 245330A CA 1043996 A CA1043996 A CA 1043996A
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- cylindrical
- supporting member
- opening
- fitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F15B1/12—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery
- F15B1/14—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means attached at their periphery by means of a rigid annular supporting member
-
- 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
- F16J12/00—Pressure vessels in general
-
- 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
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
-
- 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
- F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
-
- 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
- F15B2201/41—Liquid ports
- F15B2201/411—Liquid 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
- F15B2201/415—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Pressure Accumulator and Method of Forming Same ABSTRACT OF THE DISCLOSURE
The method of forming a pressure accumulator which comprises the steps of molding the mouth of the deformable separator or bladder of the pressure accumulator to one end of the cylindrical portion of an annular supporting member, inserting the annular supporting member and bladder into the open end of a cylindrical casing with the cylindrical portion of the supporting member in juxtaposition with the inner sur-face of said casing, said casing having the other end thereof deformed inwardly and having an axial port, fusing the other end of the cylindrical portion to the inner surface of the casing and then deforming inwardly the open end of the casing to close the latter and forming an axial port in such closed end to receive a gas charging valve.
The method of forming a pressure accumulator which comprises the steps of molding the mouth of the deformable separator or bladder of the pressure accumulator to one end of the cylindrical portion of an annular supporting member, inserting the annular supporting member and bladder into the open end of a cylindrical casing with the cylindrical portion of the supporting member in juxtaposition with the inner sur-face of said casing, said casing having the other end thereof deformed inwardly and having an axial port, fusing the other end of the cylindrical portion to the inner surface of the casing and then deforming inwardly the open end of the casing to close the latter and forming an axial port in such closed end to receive a gas charging valve.
Description
- 109~3~
, Thi.s invention relates to the art of pressure vessels and method of ~orming same and more particularly to a pressure accumulator of the type having a rigid casing with a deformable separator therein in the form of a bladder defining - :
two chambers, one o~ which is charged with gas under pressure and tne other of which is charged with oil under pressure.
As conducive to an understanding of the invention, it is to be noted that in the forming of a pressùre accumulator of the above type, where the accumulator comprises a casing of 1.
: ~ ":
.
..
- ~ l :
;
:
. . - . - - -.. . . .
(-- ~
g~ , rigid material having one end closed with an oil port defined in such closed end~ and the other end defining an open mouth which is closed by a separate plug having an axial opening to receive a gas charging valve by mea.~s of which the gas cham-ber defined by the separator o:r bladder positioned in the cas- -ing may be charged with gas under pressure, where the plug has to be machined and secured in the open mouth of the cas-ing as by welding or by spinning or rolling the open mouth of the casing over the periphery of the plug or by similar means, the cost of manufacture is considerable.
It is accordingly among the objects of the invention `
to provide a pressure accumulator of the above type wh~ch may readily be manufactured at relatively low cost with the use of relatively inexpensive components which may readily be formed and which dispenses with the need of a sep~rate closure.-~
plug to seal the open end of the casing.
According to the invention these ob~ects are accom plished by the arrangement and combination of elements herein-after described and more particularly recited in the cla.ims.
ln the accompanying drawing in which is shown one of various possible embodiments of the several features of the invention, the single figure shows a longitudinal section-al view of the pressure accumulator.
'. ':' '`'' ' ~'.
.
, ` -2-. . ~ ~. ' .
:: Referring now to the drawings, the accumulator com-prises a cylindrical sleeve 11 of rigid material such as steel, : capable o~ ~Jithstanding the pr.essure to which the accumulator ~ill be sub~ected in use.
Initially, both ends of the sleeve 11 are open aq a.t : 12 and 13. In forming the acc:umulator, the open end 13 of the sleeve 11 is deformed inwardly, for exa.mple, by spinning, roll-ing or by hot forming in a press to provide a substantially hemispherical end 15, the latter having an ~xial opening 16 ~herethrough. ~n oil port fitting 17 in the fQrm of a sleeve `. having an annular flange 18 at one end, is inserted through the open end 12 of the sleeve 11 and positioned in opening 16 so that the cylindrical body 19 of the fitting 17 protrudes from opening.l6 with--flange-18 resting~.on the inner periphery~ of opening l6. The-fitting-17 is then.secured..in.position-às.by welding as at 21. The periphery 22 of the inner end of bore 23 of fitting 17, which defines the oil port of the accumulator is beveled as shown to define a valve seat.
Thereupon, an annular supporting member 24 of resili-ent sheet metal having a deformable partition in the form of a bladder 25, preferably molded integrally therewith, is inserted through the open end 12 of the sleeve 11. The bladder 25 whlch is of natural or synthetic rubber having like characteristics has I a closed end 26 and an open mouth having a thickened rim 2l.
, More particularly, the supporting member 24 has a substantially cylindrical retaining portion 28 of outer diarneter just slightly larger than the inner diameter of sleeve 11 so .
` ~
: ~ -3-,. , 1 .';
. . . . ;
'' ` ` ; ' ` :
that the supporting member 24 may be force-fitted into the sleeve as shown in the dra~ling.
The inner end 29 of the retaining portion 28 ~s in-wardly bent as at 31 to define an annula.r shoulder and an annular lip or mounting portion 32 depends from the inner periphery 33 of the annular shoulder 31 and is inclined inward-ly slightl~ as shown, the ~hickened rim 27 o~ the bladder 25 being molded to said mounting portion 32.
The closed end 26 of the bladder 25 has secured there~
: 10 to, preferably by molding, a rigid valve member 34 adapted to move against the beveled seat 22 to close the oil port 23 dur-ing operation of the accumulator thereby preventing extrusion o~ the bladder.
` To provide a-seal.between the oil nor~ally.~charged .
I . into the chamber A on one side of the~bladder 25 and the gas .
normally charged into the chamber B on the other side or the interior of the bladder, the outer edge 35 of the retaining~
portion 28 is secured to the inner surface o~ the sleeve 11 as at 37 as by welding or by fusing. This may readily be ac~
complished through the open end 12 of the sleeve llu ; Thereupon, the end~l2 of the sleeve 11 is deformed -~: inwardly for example, as by spinning, rolling.or ho~ forming in a press to provide a substantially hemispherical end 38 ~or .
the accumulator, said end having an axial openin~ 39 which is . .
.. tapped to receive a conventional gas charging valve 41.
~ With the arrangement and method above described, a ~ :
- pressure accumulator of the type having a deformable bladder . .
: , ~ 4 ~Q~3~
therei~ may be provided wlth the use o~ relatively inexpens~ve metal stock such as a pipe or sleeve to form the outer casing or shell of the accumulator and particularly to form the end closure for the gas chamber of the accumulator thereby dispens-ing ~Jith the need for relatively expensive end closure caps there~or whlch often requLre precision machining.
' , , . - ',"
, '- ~
, Thi.s invention relates to the art of pressure vessels and method of ~orming same and more particularly to a pressure accumulator of the type having a rigid casing with a deformable separator therein in the form of a bladder defining - :
two chambers, one o~ which is charged with gas under pressure and tne other of which is charged with oil under pressure.
As conducive to an understanding of the invention, it is to be noted that in the forming of a pressùre accumulator of the above type, where the accumulator comprises a casing of 1.
: ~ ":
.
..
- ~ l :
;
:
. . - . - - -.. . . .
(-- ~
g~ , rigid material having one end closed with an oil port defined in such closed end~ and the other end defining an open mouth which is closed by a separate plug having an axial opening to receive a gas charging valve by mea.~s of which the gas cham-ber defined by the separator o:r bladder positioned in the cas- -ing may be charged with gas under pressure, where the plug has to be machined and secured in the open mouth of the cas-ing as by welding or by spinning or rolling the open mouth of the casing over the periphery of the plug or by similar means, the cost of manufacture is considerable.
It is accordingly among the objects of the invention `
to provide a pressure accumulator of the above type wh~ch may readily be manufactured at relatively low cost with the use of relatively inexpensive components which may readily be formed and which dispenses with the need of a sep~rate closure.-~
plug to seal the open end of the casing.
According to the invention these ob~ects are accom plished by the arrangement and combination of elements herein-after described and more particularly recited in the cla.ims.
ln the accompanying drawing in which is shown one of various possible embodiments of the several features of the invention, the single figure shows a longitudinal section-al view of the pressure accumulator.
'. ':' '`'' ' ~'.
.
, ` -2-. . ~ ~. ' .
:: Referring now to the drawings, the accumulator com-prises a cylindrical sleeve 11 of rigid material such as steel, : capable o~ ~Jithstanding the pr.essure to which the accumulator ~ill be sub~ected in use.
Initially, both ends of the sleeve 11 are open aq a.t : 12 and 13. In forming the acc:umulator, the open end 13 of the sleeve 11 is deformed inwardly, for exa.mple, by spinning, roll-ing or by hot forming in a press to provide a substantially hemispherical end 15, the latter having an ~xial opening 16 ~herethrough. ~n oil port fitting 17 in the fQrm of a sleeve `. having an annular flange 18 at one end, is inserted through the open end 12 of the sleeve 11 and positioned in opening 16 so that the cylindrical body 19 of the fitting 17 protrudes from opening.l6 with--flange-18 resting~.on the inner periphery~ of opening l6. The-fitting-17 is then.secured..in.position-às.by welding as at 21. The periphery 22 of the inner end of bore 23 of fitting 17, which defines the oil port of the accumulator is beveled as shown to define a valve seat.
Thereupon, an annular supporting member 24 of resili-ent sheet metal having a deformable partition in the form of a bladder 25, preferably molded integrally therewith, is inserted through the open end 12 of the sleeve 11. The bladder 25 whlch is of natural or synthetic rubber having like characteristics has I a closed end 26 and an open mouth having a thickened rim 2l.
, More particularly, the supporting member 24 has a substantially cylindrical retaining portion 28 of outer diarneter just slightly larger than the inner diameter of sleeve 11 so .
` ~
: ~ -3-,. , 1 .';
. . . . ;
'' ` ` ; ' ` :
that the supporting member 24 may be force-fitted into the sleeve as shown in the dra~ling.
The inner end 29 of the retaining portion 28 ~s in-wardly bent as at 31 to define an annula.r shoulder and an annular lip or mounting portion 32 depends from the inner periphery 33 of the annular shoulder 31 and is inclined inward-ly slightl~ as shown, the ~hickened rim 27 o~ the bladder 25 being molded to said mounting portion 32.
The closed end 26 of the bladder 25 has secured there~
: 10 to, preferably by molding, a rigid valve member 34 adapted to move against the beveled seat 22 to close the oil port 23 dur-ing operation of the accumulator thereby preventing extrusion o~ the bladder.
` To provide a-seal.between the oil nor~ally.~charged .
I . into the chamber A on one side of the~bladder 25 and the gas .
normally charged into the chamber B on the other side or the interior of the bladder, the outer edge 35 of the retaining~
portion 28 is secured to the inner surface o~ the sleeve 11 as at 37 as by welding or by fusing. This may readily be ac~
complished through the open end 12 of the sleeve llu ; Thereupon, the end~l2 of the sleeve 11 is deformed -~: inwardly for example, as by spinning, rolling.or ho~ forming in a press to provide a substantially hemispherical end 38 ~or .
the accumulator, said end having an axial openin~ 39 which is . .
.. tapped to receive a conventional gas charging valve 41.
~ With the arrangement and method above described, a ~ :
- pressure accumulator of the type having a deformable bladder . .
: , ~ 4 ~Q~3~
therei~ may be provided wlth the use o~ relatively inexpens~ve metal stock such as a pipe or sleeve to form the outer casing or shell of the accumulator and particularly to form the end closure for the gas chamber of the accumulator thereby dispens-ing ~Jith the need for relatively expensive end closure caps there~or whlch often requLre precision machining.
' , , . - ',"
, '- ~
Claims (6)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. The method of forming a pressure vessel of the type having a deformable separator therein, from an elongated cylindrical rigid metal sleeve having at least one open end, which comprises the steps of inserting an annular supporting member of resilient sheet metal having a cylindrical retaining portion with an annular mounting portion at one end to which the periphery of said deformable separator is bonded into said cylindrical sleeve through said at least one open end so that the cylindrical retaining portion of the supporting member is in juxtaposition to thee inner wall surface of the cylindrical sleeve in spaced relation to said open end, thereafter bonding said retaining portion to said sleeve and thereafter deforming inwardly said at least one open end of said sleeve to close such end and thereafter forming an axial opening in said now closed end.
2. The method set forth in claim 1 in which one of said open ends of the sleeve is first deformed inwardly to close such open end, and the annular supporting member with the separator bonded thereto is inserted into the sleeve through the other end thereof.
3. The method set forth in claim 2 in which a fitting having a cylindrical body portion with a radially outwardly extending flange is positioned in the axial opening formed in the end of the sleeve which is first deformed inwardly so that the body portion of the fitting protrudes from such opening with the flange resting on the inner periphery thereof, said fitting is thereupon secured in fixed position in said opening, said annular supporting member with the bladder bonded thereto is then inserted into the sleeve through the other end thereof, and such other end is thereupon deformed inwardly to close the latter.
4. The method of forming a pressure accumulator of the type having a deformable bladder therein, the bladder having an enlarged diameter mouth and a closed end which comprises in sequence the steps of deforming inwardly one of the ends of an elongated cylindrical sleeve to form a substantially hemispherical closed end having an axial opening, thereafter inserting through the open end of said sleeve a fitting having a cylindrical body portion with a radially outwardly extending flange at one end into position in said opening so that the body portion of the fitting protrudes from said opening with the flange resting on the inner periphery of the opening, securing said fitting in fixed position, thereafter inserting an annular supporting member of resilient sheet metal having a cylindrical side wall and having the mouth of the deformable bladder bonded to one end thereof, into an intermediate position within said cylindrical sleeve so that the cylindrical side wall of the annular supporting member is in juxtaposition to the inner wall surface of said sleeve and thereupon deforming inwardly the other end of the sleeve to form a second substantially hemispherical closed end portion having an axial opening.
5. The method set forth in claim 4 in which the axial opening in the second hemispherical end portion defines a gas charging port, said port is tapped and a gas charging valve is screwed into said tapped port.
6. The method set forth in claim 4 in which the other end of said cylindrical side wall of the annular supporting member is fused to the inner surface of said cylindrical sleeve to form an annular seal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55222775A | 1975-02-24 | 1975-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043996A true CA1043996A (en) | 1978-12-12 |
Family
ID=24204429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA245,330A Expired CA1043996A (en) | 1975-02-24 | 1976-02-09 | Pressure accumulator and method of forming same |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS51109514A (en) |
| AT (1) | AT347210B (en) |
| AU (1) | AU508014B2 (en) |
| BE (1) | BE838349A (en) |
| BR (1) | BR7601084A (en) |
| CA (1) | CA1043996A (en) |
| CH (1) | CH599471A5 (en) |
| DD (1) | DD124364A5 (en) |
| DE (1) | DE2604958C2 (en) |
| ES (1) | ES445443A1 (en) |
| FR (1) | FR2301712A1 (en) |
| GB (1) | GB1483720A (en) |
| IN (1) | IN145787B (en) |
| IT (1) | IT1055312B (en) |
| NL (1) | NL7601594A (en) |
| SE (1) | SE414131B (en) |
| ZA (1) | ZA761068B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288894A (en) * | 1979-09-24 | 1981-09-15 | Greer Hydraulics, Incorporated | Method of manufacturing pressure vessels by heat forming |
| EP0029741A3 (en) * | 1979-11-26 | 1982-11-03 | Grove Valve And Regulator Company | A method of forming a valve body section with integral hub and making a valve body using such body sections |
| DE19711844B4 (en) * | 1997-03-21 | 2005-06-02 | Metall-Spezialrohr Gmbh | Method for producing a compressed gas container |
| WO1998055258A1 (en) * | 1997-06-06 | 1998-12-10 | Hydac Technology Gmbh | Method for producing a membrane reservoir |
| KR100620303B1 (en) | 2003-03-25 | 2006-09-13 | 도요다 지도샤 가부시끼가이샤 | Gas storage tank and its manufacturing method |
| CN106112415B (en) * | 2016-08-26 | 2018-08-17 | 浙江铂达科技有限公司 | A kind of manufacturing method of diaphragm accumulator |
| CN107984164A (en) * | 2017-10-23 | 2018-05-04 | 宜兴市九洲封头锻造有限公司 | A kind of dual phase steel takeshapes of closure technique |
| CN110757101A (en) * | 2019-10-17 | 2020-02-07 | 河南神州精工制造股份有限公司 | Production process of elliptical seal head and dish-shaped seal head |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB560643A (en) * | 1941-12-12 | 1944-04-13 | Bendix Aviat Corp | Improvements in or relating to hydraulic accumulators |
| US2405201A (en) * | 1942-08-29 | 1946-08-06 | Imp Brass Mfg Co | Method of forming closed metal capsules |
| US2659128A (en) * | 1950-01-21 | 1953-11-17 | Weatherhead Co | Method of making dehydrators |
| FR1474842A (en) * | 1966-01-13 | 1967-03-31 | Citroen Sa Andre | Manufacturing process for pressurized fluid tanks |
| FR1505081A (en) * | 1966-12-15 | 1967-12-08 | Langen & Co Kg | Method of making a hydro-pneumatic pressure accumulator |
| US3500866A (en) * | 1967-08-01 | 1970-03-17 | Greer Hydraulics Inc | Pressure vessel |
| GB1412253A (en) * | 1972-01-14 | 1975-10-29 | Automotive Prod Co Ltd | Accumulators for use in liquid pressure systems |
| DE2331477A1 (en) * | 1973-06-20 | 1975-01-16 | Langen & Co | Hydropneumatic pressure reservoir - formed sheet metal for has stiffening corrugation to receive partition |
-
1976
- 1976-02-06 BE BE164158A patent/BE838349A/en not_active IP Right Cessation
- 1976-02-09 DE DE2604958A patent/DE2604958C2/en not_active Expired
- 1976-02-09 CA CA245,330A patent/CA1043996A/en not_active Expired
- 1976-02-10 IN IN240/CAL/76A patent/IN145787B/en unknown
- 1976-02-17 IT IT20250/76A patent/IT1055312B/en active
- 1976-02-17 NL NL7601594A patent/NL7601594A/en not_active Application Discontinuation
- 1976-02-20 FR FR7604686A patent/FR2301712A1/en active Granted
- 1976-02-20 BR BR7601084A patent/BR7601084A/en unknown
- 1976-02-20 CH CH211776A patent/CH599471A5/xx not_active IP Right Cessation
- 1976-02-23 AT AT125976A patent/AT347210B/en not_active IP Right Cessation
- 1976-02-23 AU AU11357/76A patent/AU508014B2/en not_active Expired
- 1976-02-23 DD DD191433A patent/DD124364A5/xx unknown
- 1976-02-23 JP JP51018741A patent/JPS51109514A/ja active Pending
- 1976-02-23 SE SE7602112A patent/SE414131B/en unknown
- 1976-02-23 ES ES445443A patent/ES445443A1/en not_active Expired
- 1976-02-24 GB GB7252/76A patent/GB1483720A/en not_active Expired
- 1976-02-24 ZA ZA761068A patent/ZA761068B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SE7602112L (en) | 1976-08-25 |
| ATA125976A (en) | 1978-04-15 |
| ES445443A1 (en) | 1977-11-01 |
| BR7601084A (en) | 1976-09-14 |
| AU508014B2 (en) | 1980-03-06 |
| FR2301712B1 (en) | 1981-09-25 |
| DE2604958A1 (en) | 1976-09-02 |
| CH599471A5 (en) | 1978-05-31 |
| NL7601594A (en) | 1976-08-26 |
| IN145787B (en) | 1978-12-23 |
| SE414131B (en) | 1980-07-14 |
| ZA761068B (en) | 1977-02-23 |
| AT347210B (en) | 1978-12-11 |
| IT1055312B (en) | 1981-12-21 |
| DD124364A5 (en) | 1977-02-16 |
| AU1135776A (en) | 1977-09-01 |
| FR2301712A1 (en) | 1976-09-17 |
| JPS51109514A (en) | 1976-09-28 |
| BE838349A (en) | 1976-05-28 |
| GB1483720A (en) | 1977-08-24 |
| DE2604958C2 (en) | 1986-11-20 |
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