Linear peristaltic pump with reshaping fingers...

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

Patent

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Details

F04B 43/08 (2006.01)

Patent

CA 2347500

A linear peristaltic pump of the type for removable engagement of a portion of a flexible tubing (16) and having a plurality of sequentially actuated pumping elements (24) which act along the engaged portion of the flexible tubing (16), with the pumping elements (24) reciprocated in a first direction to collapse adjacent segments of the tubing (16) and then in a second direction to release the adjacent segments of the tubing (16), each pumping element having a flat pumping surface reciprocated in a sequence so that fluid in the flexible tubing (16) is moved along the engaged portion of the tubing. The linear peristaltic pump is provided with a plurality of opposed pairs of pivotable reshaping fingers (26), with each pair of the reshaping fingers (26) interposed adjacent to one of the pumping elements (24) in sequence along the engaged portion of the flexible tubing (16). A finger drive and follower mechanism is formed by and engaged between each of the plurality of pairs of reshaping fingers (26) and the adjacent ones of the pumping elements (24) for actuating the reshaping fingers (24) into reshaping engagement with the flexible tubing (16) upon release thereof by the adjacent one of the pumping elements (24).

Cette pompe péristaltique linéaire est du type comportant un conduit souple soumis à une pression momentanée exercée par plusieurs éléments de pompage actionnés séquentiellement et agissant le long de la section dudit conduit souple. Ces éléments de pompage décrivent un mouvement de va-et-vient, dans une première direction, afin de comprimer des segments adjacents du conduit, puis dans une seconde direction, afin de libérer lesdits segments adjacents, chaque élément de pompage possédant une surface de pompage plate subissant un mouvement en va-et-vient séquentiel de sorte que le fluide se trouvant dans le conduit souple se déplace le long de la section du conduit sur laquelle agissent ces éléments de pompage. Cette pompe péristaltique linéaire est pourvue de plusieurs paires opposées de doigts pivotants, chaque paire de doigts de reformage s'intercalant avec l'un des éléments de pompage de manière séquentielle le long de la section du conduit souple sur laquelle agissent lesdits éléments. Un mécanisme d'entraînement de doigt et un mécanisme suiveur de came, qui se trouvent entre chacune des paires de doigts de reformage et chaque élément de pompage adjacent, entrent en prise avec ces pièces de façon à actionner les doigts de reformage et les amener à agir sur le conduit souple, le comprimant alors une fois celui-ci libéré par l'élément de pompage contigu.

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