Cleaning machine
Abstract
Abstract A CLEANING MACHINE WHICH IS PARTICULARLY USEFUL FOR CLEANING CARPETS. A PREFERRED EMBODIMENT OF THE MACHINE INCLUDES A HEAD FOR DIRECTING A CLEANING LIQUID SUCH AS WATER OR AN AQUEOUS CLEANING SOLUTION ONTO A CARPET OR THE LIKE AND FOR WITHDRAWING SOIL AND EXCESS LIQUID FROM THE CARPET AND SUPPLYING IT TO A CHAMBER WHICH CONTAINS A FILTER. A BLOWER MAY BE UTILIZED TO SUCK THE EXCESS LIQUID AND SOIL INTO THE CHAMBER OR TANK FOR CONTAINING LIQUID. THE LIQUID IS FORCED THROUGH THE FILTER, FOR EXAMPLE BY MEANS OF A PUMP, AND THE FILTER ACTS TO REMOVE CONTAMNANTS FROM THE LIQUID. THE CLEAN LIQUID FLOWS FROM THE EXHAUST SIDE OF THE FILTER THROUGH A FLOW CIRCUIT BACK TO THE HEAD WHERE IT IS DIRECTED AGAINST THE CARPET, FOR EXAMPLE AS A SPRAY. A HEATER IS PROVIDED TO RAISE THE TEMPERATURE OF THE LIQUID SO THAT IT IS VERY HOT WHEN SPRAYED, THEREBY IMPROVING ITS CLEANING ACTION. THUS, THE MACHINE INVOLVES A COMBINATION OF RECIRCULATION, FILTERING AND HEATING PROVIDING GOOD CLEANING AND HIGH EFFICIENCY.
Inventors
- 👤 Charles R Howerin
- 👤 Marion W Humphreys
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |