F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
F04B 19/22 (2006.01) F04B 43/00 (2006.01) F04B 49/00 (2006.01) F04B 51/00 (2006.01)
Patent
CA 2346930
A tube in a pumped fluid system can become obstructed by a clog. The clog is automatically cleared in response to an obstruction signal (B) by modifying the pumping cycle which is normally used to pump the fluid. In particular, the pumping cycle is stopped after a compression stroke (BDC'-TDC) to apply sustained high pressure in the clogged tube, using the same fluid and the same pump, to expel the clog from the tube. The obstruction signal (B) is derived by measuring the pressure due to viscosity (C) effects have subsided. Therefore, if the pressure remains elevated, a determination of an obstructed state can reliably be made which may be caused by a clog.
Des caillots peuvent obstruer un tube faisant partie d'un système de liquides pompés. Le caillot est automatiquement enlevé en réponse à un signal d'obstruction (B) par la modification du cycle de pompage normalement utilisé pour pomper le liquide. Le cycle de pompage est notamment arrêté après un temps de compression (PMB'-PMH) afin d'appliquer une haute pression soutenue à l'intérieur du tube obstrué en utilisant le même liquide et la même pompe pour expulser le caillot du tube. On dérive le signal d'obstruction (B) en mesurant la pression influencée par la viscosité (C). Ainsi, si la pression demeure élevée, il est possible de déterminer de manière fiable un état d'obstruction, qui peut être causé par un caillot.
Chesnes Charlie P.
Frantz Mark G.
Honard Mark R.
Manzie Patrick
Nemer Richard E.
Frantz Medical Development Ltd.
Perley-Robertson Hill & Mcdougall Llp
LandOfFree
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