Reinz-Dichtungs Gmbh

Dana Automotive Systems Group, LLC

Guenther Unseld

Kurt Hoehe

Georg Egloff

Robert Blersch

Bernd Ruess

Johann Waldvogel

Juergen Schneider

Oliver Schimmele

Albrecht Sailer

Armin Guetermann

Andreas Goettler

Volker Just

A flat gasket with at least one extended carrier layer is described. Such flat gaskets are for instance used as transmission plates or also as cylinder head gaskets. They are also used in the area of the exhaust line of a combustion engine. The at least one extended carrier layer has a first surface and a second surface opposite to the first surface. The layer also has a passage opening for a fluid which penetrates the carrier layer. The circumferential edge of each of the two surfaces has one or several projections which encircle the passage opening at least in sections and protrude into the passage opening. A functional element is arranged in the passage opening, which is held by the one or several projections in the passage opening.

Flat gasket

The invention relates to a metallic flat gasket comprising a gasket layer () having at least one combustion chamber through-opening () which is surrounded by an elastically deformable sealing element () which is configured in the form of an undulatory profiling () in the gasket layer () in such a way that on each of the surfaces () of the gasket layer () at least two wave crests () and two wave troughs () are present. The thickness (hyl) of the gasket layer () in the region of the sealing element (), in the unloaded state, is greater than the original thickness (alpha) of the gasket layer. Apart from the undulatory profiling (), no further sealing or support elements are present around the combustion chamber through-opening (). The sealing element has, when subjected to linear compression of from 500 to 2,800 N/mm in a direction which is substantially perpendicular to the plane (E) of the gasket layer, a thickness which is greater by from 0.05 to 0.3 mm than the original thickness (d) of the gasket layer which has at least 4 through-openings for fastening means () and also at least one further through-opening () for lubricant or coolant that is surrounded by an elastomer sealing element (), the combustion chamber through-opening () having a diameter of less than 200 mm.

Metallic flat gasket

The invention relates to a metallic flat gasket () with at least one gasket layer (), in which at least one through opening () is present, which is surrounded by a sealing area (), in which at least one elastically deformable element () surrounding the through opening () is arranged, and an optional, at least one functional area () with at least one elastically deformable sealing or supporting element (), which does not separately surround a single through-opening, where outside of the at least one sealing area () and the optional at least one functional area () on at least one of the surfaces () of at least one of the gasket layers () an area is surface structured in such a way that the gasket layer () in this area has a thickness that is larger than the original thickness of the gasket layer (). The surface structured area () covers the at least one surface () outside of the sealing () and the functional area () at least in regions and the surface structure is formed by alternating depressions () and protrusions () which run on at least one cohort of essentially parallel, straight virtual lines extending over the total area of the structured area ().

A gasket has sealing layer(s) with beads which are assigned to passage opening(s), and stopper layer(s) with a stopper which limits the resilience of the bead(s). The stopper is composed of a plurality of directly successive ridge-shaped elevations and groove-shaped depressions, both being trapezoidal in cross section and both being formed in on both sides of the stopper layer, with setting angles of the trapezium flanks. The trapezoidal elevations of the one side are situated opposite the trapezoidal depressions of the other side. A cross section (Q) which is delimited by opposing trapezium flanks which are adjacent to one another is the same or greater than a cross section (Q) which is delimited between the opposing depressions of the two sides.

Multi-layer metallic flat gasket

Growing community of inventors

Neenstetten, Germany

Guenther Unseld