Patent US3606631A successfully refreshed from Google Patents.
US3606631A
Expired / Lapsed
US
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Portable cleaning machine
Assignee: Von Schrader Manufacturing Co
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Filing: 1970-06-01
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Granted: 1971-09-21
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Expires: 1990-06-01
Abstract
Abstract A CLEANING MACHINE FOR UPHOLSTERY, CARPETING, FABRICS OR THE LIKE WHICH GENERATES A FOAM FROM A CLEANING SOLUTION. THE MACHINE FIRST VACUUMS THE ARTICLE TO BE CLEANED, THEN APPLIES THE FOAM THROUGH A CLEANING HEAD WHICH INCLUDES COUNTER-ROTATING BRUSH ELEMENTS, AND THEN THE SOILED FOAM AND LIQUID ARE VACUUM FROM THE ARTICLE. THE COUNTER-ROTATING BRUSHES ARE DRIVEN BY AN ELECTRIC MOTOR IN THE HEAD. THE FOAM GENERATED IN THE MACHINE IS PASSED THROUGH A HOSE TO THE HEAD AND AROUND THE MOTOR, THEREBY COOLING THE MOTOR AND WARMING THE FOAM, AFTER WHICH THE FOAM GOES OUT THROUGH THE BRUSHES.
Inventors
- 👤 Joe F Vassh
- 👤 Carl F Yandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:37
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/32; A47L11/325; A47L11/4011; A47L11/4036; A47L11/4038; A47L11/4044; A47L11/4063; A47L11/4069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |