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:
Aug. 21, 1984
Filed:
Jun. 18, 1982
Denver K Kimberlin, Pauls Valley, OK (US);
Engineering Enterprises, Inc., Oklahoma City, OK (US);
Abstract
A circuit for controlling a pump for pumping a column of gasoline floating on a column of water. A first probe is positioned at the level of the pump intake and a second probe is positioned beneath the first probe. A float switch is positioned adjacent the pump intake for providing a signal when the pump is immersed in liquid. The float switch and the probes are operatively connected to an AND gate circuit which generates a preselected signal when both probes are immersed in a nonconducting liquid. A time delay is operatively connected to the AND gate and begins a timing period responsive to the preselected signal. At the end of the timing period, the time delay provides a signal which energizes the pump. A latch circuit maintains the pump in an energized condition until both probes are again immersed in water.