Constant output fluidic system
First Claim
Patent Images
1. A system for providing a constant fluid flow from a reservoir fluid source, the system comprising;
- a pulsile pump that pumps fluid from said reservoir;
a pulse attenuator in fluid communication with said pump, said attenuator dampening pulses of fluid;
a plenum chamber receiving liquid from said attenuator;
a volume sensor which senses fluid volume within said plenum chamber, said sensor activating said pump when said fluid volume within said plenum chamber falls below a specified level and deactivating said pump when said fluid volume within said plenum chamber is above a specified level;
a pressurization source in fluid communication with said plenum chamber, said pressurization source providing a pressure head in said plenum chamber; and
an outflow from said plenum chamber.
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Abstract
A device for conditioning of fluid to minimize pulses from a pump source. A pump drives fluid from a vented fluid reservoir through a system including a combination of an attenuation tank and one or more orifice. Fluid is pumped into a plenum chamber that supplies fluid in a pulse free flow stream. A pressurized head over the fluid in the plenum chamber allows fluid delivery at a selected pressure. A volume sensor monitors the fluid level within the plenum tank and activates the pump if fluid level falls below a specified level.
123 Citations
21 Claims
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1. A system for providing a constant fluid flow from a reservoir fluid source, the system comprising;
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a pulsile pump that pumps fluid from said reservoir;
a pulse attenuator in fluid communication with said pump, said attenuator dampening pulses of fluid;
a plenum chamber receiving liquid from said attenuator;
a volume sensor which senses fluid volume within said plenum chamber, said sensor activating said pump when said fluid volume within said plenum chamber falls below a specified level and deactivating said pump when said fluid volume within said plenum chamber is above a specified level;
a pressurization source in fluid communication with said plenum chamber, said pressurization source providing a pressure head in said plenum chamber; and
an outflow from said plenum chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for delivery of constant flow liquid from a supply container, the system comprising:
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a fluid pump pumping fluid from the supply container;
an attenuation chamber coupled by tubing to the pump;
an orifice coupled by tubing to the pump such that fluid communicates with the attenuation chamber before passing through the orifice;
a plenum chamber in fluid communication with said orifice such that pulse attenuated flow enters into said chamber;
a volume sensor that senses fluid level within said plenum chamber and activates the pump to keep fluid level within the plenum chamber within a defined range;
a pressurization source in fluid communication with said plenum chamber, said source providing a pressure head in said plenum chamber; and
a plenum chamber outlet. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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- 16. In a system for providing pulse free sheath flow fluid to a flow cytometer, said system including a pump, which withdraws fluid from a vented container and transfers fluid to a holding chamber along a fluid pathway, said holding chamber having a regulated pressure and having an outflow to a flow cytometer, an improvement wherein interposed between said pump and said holding chamber is a fluid pulse attenuator comprising an attenuation chamber and an orifice, wherein said fluid pathway gasses through said attenuation chamber and said orifice in series.
Specification