The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2003
Filed:
Sep. 13, 2000
David Mioduszewski, Ann Arbor, MI (US);
David A. Fischer, Ann Arbor, MI (US);
David B. Kaminski, Clayton, CA (US);
QED Environmental Systems, Inc., Ann Arbor, MI (US);
Abstract
A method for using a controller to control a fluid pump by controlling the rate at which the pump fills with fluid and subsequently discharges fluid. The pump includes a chamber for collecting fluid from within a well bore in which the pump is disposed. A user inputs a pump cycle time and a pump cycle volume to the controller. The pump cycle time input is used to determine a cycling period for the pump. The pump cycle volume is used to allot a portion of the cycling period to the refilling of the pump with fluid and the remaining portion of the cycling period to the discharging of fluid from the pump. The controller controls the pump such that the pump is vented to atmosphere during the refill portion, allowing the pump to fill with fluid, and such that pressurized fluid, such as compressed gas, is injected into the pump during the discharge cycle, causing fluid collected within the pump to be discharged. In another mode of operation, a sensor is coupled to the controller. The sensor sense when the water level in the well bore drops below a maximum desired drawdown level, and the controller adjusts the pumping rate to avoid exceeding the maximum drawdown level.