NZ245515A - Boss arrangement for filament wound pressure vessel with non-metallic liner - Google Patents
Boss arrangement for filament wound pressure vessel with non-metallic linerInfo
- Publication number
- NZ245515A NZ245515A NZ245515A NZ24551592A NZ245515A NZ 245515 A NZ245515 A NZ 245515A NZ 245515 A NZ245515 A NZ 245515A NZ 24551592 A NZ24551592 A NZ 24551592A NZ 245515 A NZ245515 A NZ 245515A
- Authority
- NZ
- New Zealand
- Prior art keywords
- liner
- boss
- annular flange
- flange
- outer shell
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
- F17C2203/0663—Synthetics in form of fibers or filaments
- F17C2203/0673—Polymers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2109—Moulding
- F17C2209/2118—Moulding by injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2109—Moulding
- F17C2209/2127—Moulding by blowing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/036—Avoiding leaks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/044—Avoiding pollution or contamination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/05—Improving chemical properties
- F17C2260/053—Reducing corrosion
Abstract
A boss (16) is disposed in a polar opening (18) in a pressure vessel (10) which has a filament wound outer shell (12) and a non-metallic internal liner (14). The boss has a tubular neck (24) which projects outwardly from the vessel interior and an annular support flange (28) which extends radially from the internal end of the neck and supports the perimeter of the polar opening. An offset attachment flange (32) extends radially from the support flange and has two axially opposed surfaces (34,36) with locking grooves (40,42)formed therein. Each locking groove has a bottom wall intermediate a pair of mutually skewed sidewalls (50) for maintaining positive engagement with and retention of complementary respective tabs on the liner. In an application where the liner is a blow molded component, an injection molded interface member (82) is attached to the support flange and provides a site at which the liner is welded. <IMAGE>
Description
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P.O. Journal, No: . •. •>•••••••
NEW ZEALAND PATENTS ACT, 1953
No.: Date:
COMPLETE SPECIFICATION IMPROVED BOSS FOR A FILAMENT WOUND PRESSURE VESSEL
We, BRUNSWICK CORPORATION, a corporation organized and existing under the laws of the State of Delaware, United States of America, of One Brunswick Plaza, Skokie, Illinois 60077, United States of America, hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:-
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BACKGROUND OF THE INVENTION
Technical Field
The present invention is an improved boss for reinforcing the structural interface between a filament wound outer shell and a non-metallic internal liner in a 10 rounded high pressure vessel.
Background Art
In many circumstances, the qualities of lightweight construction and high resistance to fragmentation and corrosion damage are highly desirable characteristics for 15 a pressure vessel. These design criteria have been met for many years by the development of high pressure composite containers fabricated of laminated layers of wound glass fibre filaments or various types of synthetic filaments which are bonded together by a thermal-setting 20 epoxy resin. An elastomeric or other non-metal resilient liner or bladder is suspended within the filament wound shell to seal the vessel and prevent internal fluids from contacting the composite material.
Filament wound vessels often are constructed in a 25 spherical shape or a cylindrical shape with generally spherical ends for use in high pressure applications. A boss is used to reliably join the internal liner with the outer composite shell at pressurization ports in the outer shell such that fluid is prevented from penetrating between 3 0 the liner and the shell. In many applications, such as in
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"... "V v.f the aerospace industry, composite pressure vessels are required to contain extremely high pressures, operating at 25,000 p.s.i. with design burst values in the range of 50,000 p.s.i. Consequently, as internal pressure increases, the interface of the boss, the liner and the outer shell is subjected to extreme structural loading.
More particularly, as pressure within the vessel is increased, bearing stress is generated between the boss and the composite shell, resulting in a steep strain gradient through the shell, with the inner strains being much higher than those at the outer surface. Shearing stress develops between the boss and the internal liner due to relative displacement discontinuities resulting from nonuniform loading during internal pressurization. In addition, radially extending support members on the boss are subjected to unacceptable levels of bending stress which can result in fracture of the boss.
Moreover, it is critical that during the pressurization of the vessel the liner and outer shell remain firmly engaged with the boss, despite the adverse loading to which the liner and shell are subjected. The present invention is directed toward overcoming the above mentioned loading and sealing problems by providing a unique construction in a boss for a filament wound pressure vessel of the character described.
SUMMARY OF THE INVENTION
It is an object of the present invention, therefore, to provide a new and improved boss for reinforcing the structural interface between a filament wound reinforcement shell and a non-metallic internal liner in a rounded section of a high pressure vessel.
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In the exemplary embodiment of one form of the invention, a boss is disposed in an opening in a spherical section of a pressure vessel which has a filament wound outer shell and a non-metallic internal liner. The boss has a tubular neck which projects outwardly from the vessel interior and an annular support flange which extends radially from the internal end of the neck and supports the perimeter of the interface of the shell and liner about the opening. An offset attachment flange extends radially from the support flange and has an annular locking groove engaged with a complementary tab on the liner.
In the disclosed embodiment of the invention, locking grooves are provided on each of two axially opposite offset surfaces of the attachment flange. The locking groove in the outer surface of the attachment flange opens outwardly and the locking groove in the inner surface of the attachment flange opens inwardly, with each of the locking grooves having a bottom wall intermediate a pair of mutually skewed sidewalls for maintaining positive engagement with the liner. The offset characteristic of the attachment flange reduces the risk that the liner will extrude out of engagement with the boss and cause leakage between the outer shell and the liner.
In order to reduce shear stress between the boss and the liner during internal pressurization of the vessel, a non-metallic shear stress relieving layer is interposed between the outer surface of the annular flange and the inner surface of the outer shell. The interposed layer may be made of any plastic, elastomeric, or other non-metallic material, and may be manufactured by a molding process or cut from sheet stock.
Pressurization damage is also reduced by the unique construction of the boss. In a preferred form, the support
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flange has a diameter sufficient to prevent damage to the outer shell when the vessel is pressurized and is sufficiently thick to avoid unacceptable levels of bending stress in the support flange and attachment flange. The 5 boss may be made from alloys of aluminum, steel, nickel, titanium, or other metals.
In another form of the invention, the liner is made of blow molded high density polyethylene, or HDPE. An axisymmetric interface member is secured to the boss 10 adjacent the pressurization port to provide a site for attaching the liner. The interface member preferably is made of injection molded HDPE which, when solidified, shrinks into conformity with the boss and is thereby securely molded to the boss. The liner is bonded, as by 15 plastic molding, directly to the interface member. A threaded retainer nut is advanced through the neck of the boss to lock the interface member in place.
other objects, features and advantages of the invention will be apparent from the following detailed 20 description taken in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
The features of this invention which are believed to be novel are set forth with particularity in the append-25 ed claims. The invention, together with its objects and advantages, may be understood from the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements in the figures and in which:
3 0 FIGURE 1 is fragmentary sectional view of the rounded end of an axisymmetric pressure vessel having a
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boss which incorporates the features of the present invention;
FIGURE 2 is a fragmentary sectional view similar to FIGURE 1 in which the boss is joined to the pressure vessel along only one side thereof, and wherein the internal liner engages only one of the locking grooves in the radial flange; and
FIGURE 3 is fragmentary sectional view of the rounded end of an axisymmetric pressure vessel having a further embodiment of a boss construction.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figure 1 illustrates in fragmented section the rounded, preferably substantially spherical, end of an axisymmetric pressure vessel, generally designated 10. The pressure vessel 10 is comprised of a fiber reinforced outer shell 12 and a non-metallic internal liner 14. A boss 16 according to the present invention extends outwardly through a polar opening 18 formed in the outer shell 12 and defines a pressurization port 20 through which fluid at high pressure may be communicated with the interior of the pressure vessel 10. It is to be noted, however, that the invention may be used in connection with non-polar openings in vessels, as, for example, an opening in a purely spherical vessel. A thin shear accommodating layer 22 is interposed between the outer shell 12, the boss 16 and the liner 14 to prevent damage to the shell or liner during pressurization of the vessel, as will be described hereafter.
The outer shell 12 comprises a generally known composite reinforcement made of fiber reinforcing material in a resin matrix. The fiber may be glass fibre, ARAMID,
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carbon, graphite, or any other generally known fibrous reinforcing material. The resin matrix used may be epoxy, polyester, vinylester, thermoplastic or any other suitable resinous material capable of providing the fragmentation resistance required for the particular application in which the vessel is to be used.
The internal liner 14 may be made of plastic or other elastomers and can be manufactured by compression molding, blow molding, injection molding or any other generally known technique. The boss 16 preferably is composed of an alloy of aluminum, steel, nickel, or titanium, although it is understood that other metal and non-metal materials, such as composite materials, are suitable. The thin layer 22 may be made of plastic, or other non-metallic material and may be manufactured by a molding process or, alternatively, cut from sheet stock.
As shown in Figure 1, the subject boss 16 has an outwardly projecting neck 24 with a tapered throat 26 extending through the polar opening 18 in the outer shell 12. The throat 26 is tapered so as to form a concave peripheral groove for receipt of the fiber and resin matrix which make up the shell so that the latter captures the boss 16 to prevent movement of the boss into or out of the vessel 10.
Immediately within the pressure vessel 10, an annular support flange 28 radiates from the neck 24 and defines an outer surface 3 0 of the support flange 28 by which pressurization loads are distributed about the perimeter of the polar opening 18 in the composite shell 12. The support flange 28 has a width Wx such that the overall diameter of the support flange 28 is sufficient to prevent damage to the outer shell 12 when the pressure vessel 10 is pressurized.
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In addition, a portion of the thin layer 22 is interposed between the support flange 28, the liner 14 and the outer shell 12 to further minimize damage as the vessel is pressurized. Specifically, pressurization of the vessel 5 interior results in expansive distortion of the rounded vessel end, such that relative slip between the inner surface of the outer shell 12 and the mating portions of the liner 14 and the support flange 28 may occur. In order to accommodate the relative slip and relieve shear stresses 10 otherwise occurring at this interface, the interposed layer 22 extends across the rounded vessel end a distance substantially equal to the diameter Dj of the circular section of the pressure vessel 10.
An annular attachment flange 32 projects radially 15 outward from the support flange 28 a distance W2. The attachment flange 32 has an outer surface 34 which is inwardly offset from the outer surface 3 0 of the support flange 28 by a distance Tx, and the attachment 32 has an inner surface 3 6 which is outwardly offset from an inner
2 0 surface 3 8 of the support flange 28 by a distance T2.
Thus, support flange 28 has a thickness T3 which is sufficient to limit bending stresses in the boss to an acceptable level when the vessel is pressurized.
A pair of annular locking grooves 40 and 42, 25 respectively, are located one in outer surface 34 of the attachment flange 32 and the other in the inner surface 36 of the support flange 38. Each groove receives a complementary tab 44,46, respectively, on the internal liner 12.
3 0 The locking groove 40 is an outwardly opening groove having a bottom wall 48 intermediate a pair of mutually skewed sidewalls 50, which is to say the groove 40 is a dove-tailed groove. It is understood that other
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undercut features effective to mechanically lock the liner to the boss are contemplated by the present invention.
The locking groove 42 is formed in the inner surface 3 6 of the attachment flange 32 and has a bottom wall 52 intermediate a pair of mutually skewed sidewalls 54 to again define a dove-tail groove. The complementary geometry of the skewed sidewalls 50 and 54 and respective liner tabs 44 and 46 ensure positive engagement and retention of the internal liner 14 on the boss 16 such that pressurized fluid is prevented from leaking between the liner and the outer shell 12.
The offset characteristic of the attachment flange 32 as defined by the inward offset Tx of the outer surface 34 and the outward offset T2 of the inner surface 3 6 reduces the risk that the liner 14 will extrude out of engagement with the boss 16 when under pressure by providing a sufficient surface area for the liner to seal with the attachment flange and prevent leakage.
Figure 2 illustrates an alternative embodiment of the invention in which the internal liner 14 only engages the annular locking groove 40 formed in the outer surface 34 of the attachment flange 32. In the embodiment illustrated in Figure 2, the internal liner 14 has only a singular annular tab 44 engaged with the boss 16.
Figure 3 illustrates a further embodiment of a boss 56 used in conjunction with a filament wound pressure vessel, generally designated 58. Pressure vessel 58 has a fiber reinforced outer shell 60 and a non-metallic internal liner 62. In a preferred form, the internal liner is formed of blow molded high density polyethylene (HDPE).
Boss 56 has a tubular neck 64 which extends axially outward through a polar opening 66 formed in the outer shell 60 and defines a stepped pressurization port 68 through which
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fluid at high pressure may be communicated with the interior of pressure vessel 58.
An annular support flange 70 radiates outwardly from neck 64 immediately within the pressure vessel and has a sloped outer surface 72 and an oppositely sloped inner surface 74. In other words, surfaces 72 and 74 converge toward the periphery of flange 70. Outer surface 72 distributes pressurization loads about the perimeter of the polar opening 66 in the composite shell 60 to prevent damage to the outer shell when pressure vessel 58 is pressurized. Inner surface 74 has a recessed portion 75 adjacent pressurization port 68 and an axially inward opening groove 77 for purposes to be described hereafter.
A thin shear accommodating layer 76 is interposed between outer shell 60, boss 56 and internal liner 62 to prevent damage to the shell or liner during pressurization of the vessel. More specifically, shear accommodating layer 76 has a pair of divergent leaves 78 and 80. Leaf 78 is interposed between outer surface 72 of support flange 70 and the inner surface of outer shell 60, and leaf 80 is interposed between inner surface 74 of support flange 70 and the outer side of internal liner 62. Shear accommodating layer 76 preferably is formed of a material suitable for relieving slip-induced shear stresses otherwise occurring at the interface of support flange 70, internal liner 62, and outer shell 60 when vessel 58 is pressurized. Injection molded thermoplastic elastomers, such as thermoplastic rubber, have been found to provide suitable performance characteristics in a shear accommodating layer.
Internal liner 62 is attached to boss 56 by means of an axisymmetric interface member 82. The interface member preferably is formed of injection molded high
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density polyethylene (HDPE) which, when cooled, shrinks into conformity with boss 56 as shown in Figure 3. More specifically, the HDPE solidifies to form an elongated hub 84 disposed in pressurization port 68 and a radially extending collar 86 seated in the recessed portion 75 of inner surface 74 on support flange 70. The HDPE flows into -groove 77 and thereby forms a complementary tab 88 for inter-locking the interface member and polar boss 56. In applications where it is desired to more securely bond interface member 82 to the polar boss, an adhesive coating is applied to the boss prior to injection of the HDPE. Once interface member 82 is firmly secured to boss 56, liner 62 is bonded to the interface member along a common seam 90. Conventional plastic welding techniques, such as hot plate welding, are effective to reliably bond the HDPE liner 62 and interface member 82.
Securement of interface member 82 is enhanced by a threaded retainer nut 92 which is advanced through pressurization port 68 in the boss to lock a distal end of elongated hub 84 against the stepped inner side wall 93 of neck 64. An O-ring seal 94 is captured between retainer nut 92 and interface member 82.
The boss construction illustrated in Figure 3 advantageously reduces the risk of leakage from liner 62 by moving the principal leakage path, that is the junction at which the distal end of hub 84 on interface member 82 meets boss 56, into the neck of the pressure vessel and upstream of retainer nut 92. Consequently, the junction is not subjected to the pressure contained within the vessel and the likelihood of leakage thereby is reduced. In addition, the embodiment of Figure 3 isolates boss 56 from fluids contained within vessel 58 and thus prevents 1)
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contamination of the fluid contents of the pressure vessel, and 2) corrosion of the boss.
It will be understood that the invention may be embodied in other specific forms without departing from the central characteristics thereof. The present examples and embodiments, therefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein before, but by the following claims.
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Claims (9)
1. A boss system for a pressure vessel having a filament wound outer shell and a non-metallic internal liner, the system comprising: a boss having a tubular neck projecting outwardly through an opening in the outer shell; an annular flange extending radially from an end of the neck within the vessel, the annular flange having an outer surface for reinforcing the perimeter of the opening in the shell; a first generally dovetail-shaped locking groove in the outer surface of the annular flange; a second generally dovetail-shaped locking groove in the inner surface of the annular flange; the liner being split at the annular flange with an outside portion outside the flange and an inside portion inside the flange; a first generally dovetail-shaped tab on the outside portion of the liner for locking in the first locking groove in the outside surface of the annular flange; and a second generally dovetail-shaped tab on the inside portion of the liner for locking in the second locking groove in the inside surface of the annular flange. 245515
2. The boss system of claim 1 in which a shear stress relieving layer separate from the liner is interposed between the outer surface of the annular flange and the inner surface of the outer shell to accommodate relative slip therebetween during pressurization of the vessel.
3. The boss system of claim 1 in which the boss comprises a material selected from the group consisting of alloys of aluminum, steel, nickel, and titanium or of composite materials.
4. The boss system of claim 1, including a shear stress relieving layer interposed between the outer surface of the annular flange and an inner surface of the outer shell to accommodate relative slip therebetween during pressurization of the vessel.
5. The boss system of claim 4 wherein the shear stress relieving layer is made of a thermosetting elastomer.
6. The boss system of claim 1, including an attachment fiange extending radially from said annular flange and having an outer surface spaced inwardly of the outer shell, said first generally dovetail-shaped locking groove being in the outer surface of the attachment flange.
7. The boss system of claim 6 wherein said attachment flange has ■'' ' an inner surface offset from the inner surface of said annular flange. ^ . 1U94 r' -14- 245515
8. The boss system of claim 7 wherein the outer surface of the attachment flange is offset from the outer surface of said annular flange.
9. A boss system for a pressure vessel having a filament wound outer shell and a non-metallic internal liner, substantially as herein described with reference to any embodiment shown in the accompanying drawings. OATED THIS llc^DAYOF Jf i 1 irMK COP THP APPI irAMTS
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81861992A | 1992-01-10 | 1992-01-10 | |
US90272592A | 1992-06-23 | 1992-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ245515A true NZ245515A (en) | 1994-12-22 |
Family
ID=27124285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NZ245515A NZ245515A (en) | 1992-01-10 | 1992-12-18 | Boss arrangement for filament wound pressure vessel with non-metallic liner |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0550951B1 (en) |
JP (1) | JP3517789B2 (en) |
CN (1) | CN1032273C (en) |
AT (1) | ATE130421T1 (en) |
AU (1) | AU653639B2 (en) |
BR (1) | BR9204294A (en) |
CA (1) | CA2080856C (en) |
DE (1) | DE69206114T2 (en) |
EG (1) | EG20012A (en) |
HU (1) | HU214759B (en) |
MX (1) | MX9300077A (en) |
MY (1) | MY110573A (en) |
NZ (1) | NZ245515A (en) |
RU (1) | RU2091648C1 (en) |
Families Citing this family (59)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5518141A (en) * | 1994-01-24 | 1996-05-21 | Newhouse; Norman L. | Pressure vessel with system to prevent liner separation |
DE19526154C2 (en) * | 1995-07-10 | 1997-04-17 | Mannesmann Ag | Composite pressure vessel for storing gaseous media under pressure with a plastic liner |
WO1997020683A1 (en) * | 1995-12-04 | 1997-06-12 | Toray Industries, Inc. | Pressure vessel and method of manufacturing same |
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US5819978A (en) * | 1997-04-24 | 1998-10-13 | Essef Corporation | Two piece composite inlet |
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1992
- 1992-08-07 EP EP92307243A patent/EP0550951B1/en not_active Expired - Lifetime
- 1992-08-07 AT AT92307243T patent/ATE130421T1/en not_active IP Right Cessation
- 1992-08-07 DE DE69206114T patent/DE69206114T2/en not_active Expired - Lifetime
- 1992-09-25 MY MYPI92001720A patent/MY110573A/en unknown
- 1992-10-06 CN CN92112085.0A patent/CN1032273C/en not_active Expired - Lifetime
- 1992-10-08 AU AU26319/92A patent/AU653639B2/en not_active Expired
- 1992-10-19 CA CA002080856A patent/CA2080856C/en not_active Expired - Lifetime
- 1992-11-05 BR BR929204294A patent/BR9204294A/en not_active IP Right Cessation
- 1992-11-25 JP JP33679592A patent/JP3517789B2/en not_active Expired - Lifetime
- 1992-12-18 NZ NZ245515A patent/NZ245515A/en unknown
-
1993
- 1993-01-06 EG EG993A patent/EG20012A/en active
- 1993-01-06 RU RU9393005014A patent/RU2091648C1/en active
- 1993-01-08 MX MX9300077A patent/MX9300077A/en unknown
- 1993-01-08 HU HU9300040A patent/HU214759B/en not_active IP Right Cessation
Also Published As
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RU2091648C1 (en) | 1997-09-27 |
HU9300040D0 (en) | 1993-04-28 |
MX9300077A (en) | 1993-12-01 |
EP0550951A1 (en) | 1993-07-14 |
CA2080856C (en) | 2001-01-30 |
DE69206114T2 (en) | 1996-04-18 |
HUT72870A (en) | 1996-05-28 |
JP3517789B2 (en) | 2004-04-12 |
CA2080856A1 (en) | 1993-07-11 |
DE69206114D1 (en) | 1995-12-21 |
EP0550951B1 (en) | 1995-11-15 |
HU214759B (en) | 1998-05-28 |
AU653639B2 (en) | 1994-10-06 |
ATE130421T1 (en) | 1995-12-15 |
BR9204294A (en) | 1993-07-13 |
CN1074281A (en) | 1993-07-14 |
CN1032273C (en) | 1996-07-10 |
MY110573A (en) | 1998-08-29 |
AU2631992A (en) | 1993-07-15 |
EG20012A (en) | 1997-02-27 |
JPH06137433A (en) | 1994-05-17 |
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