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:
Oct. 23, 2001
Filed:
Jun. 26, 2000
Patrick J. Rolfes, Corona Del Mar, CA (US);
Other;
Abstract
A water filter replacement indicator for apparatus that utilizes a filter for purifying water which has a power supply (,) and an auxiliary power supply (,). A timer (,) receives electrical energy from one of the power supplies, generating a first output signal indicating timed intervals. A divider (,) receives this first output signal quantifying the signal until a predetermined number of modulations are perceived at which time it produces a second output signal. A counter (,) receives the second output until a predetermined number of events are perceived at which time it produces a third, fourth and fifth output signal. The third output signal energizes a green light (,) indicating that the filter is operating within its usable life. The fourth output signal energizes a yellow light (,) indicating that the filter is about to reach its predetermined life span. The fifth output signal energizes a flashing red light (,) designating that it is time for filter replacement, further, when the red light is energized the green and yellow light are disengaged.