Inert plastic coated flexible type diaphragm for application...

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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Details

F04B 43/02 (2006.01) F04B 43/00 (2006.01) F04B 53/14 (2006.01) F16J 3/02 (2006.01)

Patent

CA 2184568

Inert plastic coated flexible diaphragm for sanitary pump applications includes a first body portion, disposed in center of diaphragm, which is relatively thick and exhibits a first degree of flexibility. A second body portion is formed contiguously with the first body portion and extends around periphery thereof. The second body portion is relatively thin, compared to the first body portion, and exhibits a second degree of flexibility greater than the first degree of flexibility. A sealing bead-like member is formed contiguously with such second body portion and extends around periphery thereof for sealing the flexible diaphragm in an operating position within a housing portion of such pump. A flexible plastic layer is adhered to each surface of the first body portion, the second body portion and such sealing bead-like member which will come into intimate contact with a material to be pumped. Such plastic layer having a substantially uniform thickness. An insert member is embedded within the first body portion to enable the inert plastic coated flexible type diaphragm to be connected to a rod-like piston member disposed for reciprocal movement within such pump.

Cette invention concerne une membrane souple à revêtement de plastique inerte pour pompe sanitaire qui comprend une première partie disposée au centre de la membrane et caractérisée par une épaisseur relativement forte et un premier degré de flexibilité. Une deuxième partie contiguë à la première encercle celle-ci. Ladite deuxième partie est relativement mince, à comparer à la première partie, et présente un deuxième degré de flexibilité. Un cordon d'étanchéité formé à la périphérie de cette deuxième partie sert à sceller la membrane souple en position de travail à l'intérieur du corps de la pompe. Une couche flexible de plastique qui est collée de chaque côté de la première et de la deuxième parties ainsi que du cordon d'étanchéité de la membrane, entre en contact avec le produit à pomper. Cette couche de plastique présente une épaisseur sensiblement uniforme. Un insert est noyé dans la première partie de la membrane pour permettre son raccordement à un piston animé d'un mouvement alternatif à l'intérieur de la pompe.

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