Expansible chamber devices – Bellows type expansible chamber – With separate ring-like reinforcing element abutting pleat
Patent
1993-12-23
1995-06-06
Denion, Thomas E.
Expansible chamber devices
Bellows type expansible chamber
With separate ring-like reinforcing element abutting pleat
92 47, 92 34, F01B 1900
Patent
active
054212413
ABSTRACT:
A bellows construction is provided which defines multiple convolutions along the length thereof and having the ends of the bellows connected to respective fixed and moveable components by means of high temperature solder or weld metal. To protect the bellows against damage by overpressure, back-up rings are positioned in each of the inwardly and outwardly facing convolutions of the bellows structure. Back-up rings in the heat affected zones at the end portions of the bellows are composed of metal so that they will not become deteriorated by application of heat. Internal back-up rings in the central, non-heat affected zone of the bellows may be composed of a polymer material. All of the back-up rings of the externally facing convolutions of the bellows may be composed of polymer materials since they can be assembled within the respective convolutions. After the soldering or welding operations have been completed. Also, if desired, all of the back-up rings of the inwardly facing convolutions of the bellows may be composed of metal to provide positive assurance against any possibility of back-up ring degradation due to application of heat during soldering or welding operations.
REFERENCES:
patent: 1561065 (1925-11-01), Eggleston
patent: 1661131 (1928-02-01), Duffield
patent: 2323985 (1943-07-01), Fausek et al.
patent: 2482780 (1949-09-01), Kirby, Jr.
patent: 3530566 (1970-09-01), McMurry et al.
patent: 3530770 (1970-09-01), McMurry et al.
Denion Thomas E.
Enterra Petroleum Equipment Group
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