Liquid dispensing system with enhanced filter
AssigneeIntegrated Designs, L.P.
InventorsCarl A. Martin, Vernon H. Foersterling, Darko Hadzidedic, Raymond T. Savard, Gary Minor
Life of this patent
Estimating the term…
Abstract
A system and method for reducing the time for charging a filter in a liquid dispensing system, such as one utilizing a positive displacement pump, is disclosed. The filter is located at the input side of the pump between the source of the liquid and the pump. In order to prevent air from the filter from entering the pump a reservoir is provided between the filter and the source of the fluid. Air from the filter is vented into the reservoir through a vent tube. A vacuum is used to draw air from the filter and, through the reservoir.
Claims24
A chemical dispensing system for dispersing high purity liquid chemicals, comprising:
- a reservoir for storing liquid;
- a filter, adapted for receiving removable high purity filtering media, for filtering liquid received from the reservoir, the filter and the reservoir being in fluid communication with each other for allowing liquid to flow from the reservoir into the filter and for allowing gases from the filter to flow into the reservoir, said filter being adapted for coupling to a pump for dispensing filtered liquid;
- and
- a vacuum source for withdrawing upon activation, gases from said reservoir, the vacuum source causing gases from said filter to be drawn into and then out of the reservoir.
In a dispensing system for dispensing high purity chemicals, the dispensing systems having a reservoir in fluid communication with a filter, and a pump in fluid communication with the filter for pumping filtered liquid to a dispense point, a method of charging the filter with chemicals comprising evacuating gas from the reservoir, wherein the reservoir and the filter are coupled in a manner for allowing fluid to flow from the reservoir into the filter, and gas to flow from the filter into the reservoir, the evacuation of the reservoir thereby causing gases from the filter to flow into said reservoir as liquid is flowing from the reservoir into the filter.
A system for dispensing liquid, comprising:
- a reservoir for storing liquid received from a source through a first line;
- a filter having removable high purity filtering media for filtering liquid received from the reservoir through a second line coupling the reservoir and said filter;
- a pump for dispensing filtered liquid received from the filter;
- and
- a vacuum source coupled with the reservoir and operable, when activated, for withdrawing gas from the reservoir and from the filter through the second line.
Dependencies are inferred from the claim text.