Uniform flow displacement pump

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

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Details

F04B 43/12 (2006.01)

Patent

CA 2505720

A displacement pump comprising a pump assembly and a cassette assembly. The pump assembly includes upper and lower housing portions that define a cavity, an arm disposed in the cavity, a roller attached to the distal end of the arm, and a motor attached to the proximal end of the arm for rotating the arm. The cassette assembly is removably disposed in the cavity and comprises upper and lower cassette housing portions that form an annular compression surface with a channel therein. A hollow compression tube having a flange extending along a length thereof is secured to the compression surface by the flange being engaged with the channel. As the motor rotates the roller arm, the roller presses the compression tube against the compression surface to create a moving occlusion of the compression tube for pushing fluid through the compression tube.

L'invention concerne une pompe volumétrique constituée d'un ensemble pompe et d'un ensemble cassette. L'ensemble pompe comprend des parties de logement supérieure et inférieure qui définissent une cavité, un bras disposé dans la cavité, un rouleau relié à l'extrémité distale du bras, et un moteur fixé à l'extrémité proximale du bras pour permettre la rotation du bras. L'ensemble cassette est placé de manière amovible dans la cavité et comprend des parties de logement supérieure et inférieure formant une surface de compression annulaire dans laquelle est ménagé un canal. Un tube de compression creux doté d'une bride s'étendant sur toute sa longueur, est fixé sur la surface de compression par la bride engrenée dans le canal. Pendant que le moteur fait tourner le bras à rouleau, le rouleau presse le tube de compression contre la surface de compression pour créer une occlusion mobile du tube de compression afin de pousser le fluide à travers le tube de compression.

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