Abrasion resistant diaphragm

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

Patent

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Details

F16J 3/02 (2006.01) F01B 19/00 (2006.01) F04B 43/02 (2006.01) F04B 45/04 (2006.01)

Patent

CA 2220363

The present invention provides an improved diaphragm which will substantially resist detrimental abrasive wear. Such diaphragm being used in certain applications in which at least a portion of such diaphragm moves relative to and is in contact with a nonflexing surface which would tend to abrade and excessively wear such diaphragm. Such diaphragm includes at least one layer of a flexible material. Such at least one layer of such flexible material being selected from a group consisting of EPDM, nitriles, neoprene, fluoroelastomers and various mixtures thereof. This layer of such flexible material has a first predetermined thickness. Such diaphragm further has at least a portion of such at least one layer of such flexible material disposed at least adjacent such nonflexing surface. This portion of the diaphragm has a second predetermined thickness. The second predetermined thickness being greater than such first predetermined thickness. The at least a portion of such at least one layer of flexible material is disposed at least adjacent such nonflexing surface and has such second predetermined thickness positioned on a predetermined side of such diaphragm. Such diaphragm also includes an aperture, having a predetermined diameter, formed through and substantially in a diametric center of such at least one layer of a flexible material and such at least a portion of such at least one layer of such flexible material having such second predetermined thickness.

Diaphragme amélioré résistant sensiblement à l'abrasion. Il est utilisé pour certaines applications selon lesquelles au moins une partie du diaphragme en contact avec une surface non flexible bouge en lien avec cette dernière qui aurait tendance à abraser et user de façon excessive le diaphragme constitué d'au moins une couche d'un matériau flexible. Cette couche, qui présente une première épaisseur prédéterminée, est sélectionnée parmi un groupe comprenant des EPDM, des nitriles, des néoprènes, des fluoroélastomères et divers mélanges de ces constituants. En outre, le diaphragme comprend au moins une partie de couche qui est à tout le moins adjacente à la surface non flexible. Cette partie du diaphragme présente une seconde épaisseur prédéterminée qui dépasse en importance la première épaisseur. La partie de la couche de matériau flexible est à tout le moins adjacente à la surface non flexible et présente une seconde épaisseur prédéterminée sur un côté préétabli du diaphragme. Ce dernier comporte aussi une ouverture, d'un diamètre précis, qui traverse essentiellement un centre diamétral de la couche de matériau flexible et au moins une partie de cette couche d'une seconde épaisseur prédéterminée.

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