Mls gasket with bore edge stopper bead

F - Mech Eng,Light,Heat,Weapons – 16 – J

Patent

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Details

F16J 15/08 (2006.01) F02F 11/00 (2006.01)

Patent

CA 2476387

A gasket includes an intermediate layer having resilient sealing beads flanked by stopper beads. The three-layer gasket, particularly designed for heavy duty racing engines, provides a relatively robust cross-section in web-areas between cylinder bore apertures. A thin bottom layer includes wrap-around flanged portions extending about cylinder bore edges of the intermediate layer to partially overlap cylinder bore aperture areas of that layer. The flanged portions may include a plurality of waves to increase forces to generate the seal. A thin top layer overlies the intermediate layer, as well as the overlapping portions of the bottom layer. In one described embodiment, the overlapping portions are limited to cylinder bore edges between cylinder bores. As a between-engine-overhaul indication of engine health, the top gasket layer is adapted via plastic deformation to form a permanent indentation in an aluminum cylinder head to signal excessive engine operation.

L'invention concerne un joint comprenant une couche interm~diaire pr~sentant des billes de scellement ~lastiques entour~es au niveau du bord par des billes de but~e. Le joint ~ trois couches, sp~cialement con×u pour des moteurs de comp~tition puissants, pr~sente une section transversale relativement robuste dans des zones de toile entre des ouvertures de l'al~sage. Une couche inf~rieure fine comprend des parties enveloppantes ~ rebord s'~tendant autour des bords de l'al~sage de la couche interm~diaire, de mani­re ~ chevaucher partiellement des zones d'ouverture de l'al~sage de cette couche. Les parties ~ rebord peuvent comprendre une pluralit~ d'ondes, de mani­re ~ augmenter des forces, aux fins d'obtention du scellement. Une fine couche sup~rieure recouvre la couche interm~diaire, ainsi que les parties chevauchantes de la couche inf~rieure. Dans un mode de r~alisation, les parties chevauchantes sont limit~es aux bords de l'al~sage entre des al~sages. La couche sup~rieure du joint est adapt~e par l'interm~diaire d'une d~formation plastique, de mani­re ~ former une indentation permanente dans une tÚte de cylindre en aluminium, aux fins de signalisation de fonctionnement excessif du moteur, sous la forme d'une indication entre une r~vision moteur.

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