✦ LIBER ✦

Externally activated seal system for wellhead

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 208 KB
Volume: 2009
Category: Article
ISSN: 1350-4789
DOI: 10.1016/s1350-4789(09)70409-x

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## Flat seal composed of a sealing bead and embossing Applicant: Federal-Mogul Sealing Systems GmbH, Germany A method of embossing the layers of a multi-layered steel head-gasket is covered by this patent. The embossing can provide detents and studs, which are used to locate the layers relative to