Schedule indicator
US7779775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2009 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | May 8, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air purifier (10) is disclosed which includes a housing (11) having a top wall with a schedule indicator (14). The housing top wall has a central recess (16), an annular inner groove (18) positioned concentrically about the central well, and an annular outer groove (20) positioned concentrically about the inner groove. An annular plateau (28) is formed between the inner groove and the outer groove. A first reset ring (31) is positioned within the outer groove for rotational movement therein. The first reset ring includes two inwardly extending timing indicating tabs (32) and (33). A second reset ring (35) is positioned within the inner groove for rotational movement therein. The second reset ring includes two outwardly extending timing indicating tabs or indicators (36) and (37). A knob (43) coupled to a power switch (45) is positioned within the central well for rotational movement therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.