Claims
- 1. The method of manufacturing a pressure accumulator device having a casing which is circular in section, said casing being formed of two metal shells, each having an open end and a closed end for the reception of a fluid inlet port and a gas charging valve, respectively, the steps of forming in an internal wall portion of one said shell section, in spaced relation below the open end thereof, an annular groove lying in a plane normal to the longitudinal axis of said shell section to define, at the junction of said wall portion and groove, an inwardly directed shoulder portion, positioning in said shell section having said groove a resilient cylindrical metal sleeve member having an annular first end portion and a second end portion supporting a bladder at a position within said shell whereat said first end portion is disposed immediately adjacent said shoulder portion, positioning an electrode against an interior increment of said first end portion of said sleeve, and causing said electrode progressively to scan the inner circumference of said first end portion while simultaneously inducing a current flow through said electrode, first end portion, and shell, thereby to form an annular fused connection between said first end portion and portions of said sleeve defining said groove, providing a continuous annular seal, and thereafter connecting said open end portions of said shells.
- 2. The method in accordance with claim 1 wherein said scanning movement of said electrode and said first end portion of said sleeve is effected by relatively rotating said electrode and sleeve about an axis of rotation coincident with the longitudinal axis of said shell.
- 3. The method in accordance with claim 2 wherein said electrode is yieldingly urged outwardly against said first end portion of said sleeve, thereby to deflect fused metal toward said groove.
- 4. The method in accordance with claim 1 wherein said first end portion of said sleeve includes at its inner circumference a reduced cross section edge portion defining a high resistance area, and said electrode engages against said edge portion.
- 5. The method in accordance with claim 4 wherein said groove includes a sharpened lip portion adjacent said first end of said sleeve.
Parent Case Info
This application is a division of copending application Ser. No. 685,315, filed May 11, 1976, now U.S. Pat. No. 4,098,297 issued July 4, 1978.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1188681 |
Apr 1970 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
685315 |
May 1976 |
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