High pressure bellows capsule and method of making same

Details High pressure bellows capsule and method of making same High pressure bellows capsule and method of making same

F - Mech Eng,Light,Heat,Weapons

16

L

189/66

F16L 11/11 (2006.01)

Patent

CA 1186643

Abstract of the Discusser A bellows capsule for use in applications where the pressure on the outside of the bellows capsule is substantially higher than that on the inside is formed with spacer rings positioned between the diaphragms forming adjacent bellows convolutions at the inner diameter of the bellows. The total thickness of each diaphragm pair and the intervening ring is greater than the diameter of the bead at the outer diameter or rim of each bellows convolution. When the bellows is urged to its fully compressed position, its diaphragms are able to nest so that the wall portions having a large pressure differential across them are supported by an adjacent diaphragm and a load bearing column is provided at the inner diameter of the bellows thereby minimizing diaphragm fatigue caused by repetitive high pressure stresses on the bellows when the bellows is cycled to its fully compressed position.

414370

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