Pump incorporating regulated venting means

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

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Details

F04B 43/073 (2006.01) F04B 43/00 (2006.01)

Patent

CA 2179722

The invention provides a pump comprising at least one diaphragm or cylinder movable in a reciprocating manner within a chamber, sealing means located between the diaphragm or cylinder. and the interior wall of the chamber and venting means for venting a portion of the chamber bounded by the interior wall, the diaphragm or cylinder and the sealing means, wherein the venting means incorporate pressure regulating means such that the pressure to which the said portion of the chamber is vented can be regulated. This reduces the pressures difference across the or each sealing means and thus reduces deterioration and damage.

Une pompe comprend au moins un diaphragme ou un cylindre (26, 28) qui peut se déplacer en étant animé d'un mouvement alternatif dans une chambre (12), un dispositif d'étanchéité (32a, 32b) situé entre le diaphragme ou le cylindre (26, 28) et la paroi interne de la chambre (12), et un système de purge (36) prévu pour évacuer une partie de la chambre (12) reliée par la paroi interne, le diaphragme ou le cylindre (26, 28) et le dispositif d'étanchéité (32a, 32b), ledit système de purge (36) comprenant un régulateur de pression (40) qui sert à réguler la pression à laquelle ladite partie de la chambre (12) doit être purgée. Ceci réduit les différences de pression au niveau du ou des dispositifs d'étanchéité et réduit par conséquent la détérioration et les dégâts associés.

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