US3236032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner with filter cleaning means
Assignee: Hitachi Ltd
•
Filing: 1963-01-15
•
Granted: 1966-02-22
•
Expires: 1983-01-15
Abstract
No abstract record available.
Inventors
- 👤 Yasukawa Shohei
- 👤 Hayashi Seiichi
- 👤 Takahashi Kimio
- 👤 Fujihara Masahiko
- 👤 Oya Saburo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:56
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN ELECTRIC VACUUM CLEANER COMPRISING A TOP CASING HAVING A FAN ASSEMBLY, AN EXHAUST PORT, AND AN ANNULAR FLANGE, A BOTTOM CASING HAVING A SUCTION PORT AND ANNULAR SUPPORT, AN ANNULAR PACKING HELD BETWEEN SAID ANNULAR FLANGE AND SAID ANNULAR SUPPORT, A FLEXIBLE FILTER CLOTH SUPPORTED ON SAID ANNULAR PACKING AS A PARTITION BETWEEN SAID TOP AND BOTTOM CASINGS AND HAVING AN UPPER SIDE AND A LOWER SIDE FACING SAID TOP AND BOTTOM CASINGS, RESPECTIVELY, A SUPPORT FRAME DISPOSED BETWEEN SAID FAN ASSEMBLY AND SAID FILTER CLOTH, A HANDLE MEANS MOUNTED ON SAID SUPPORT FRAME, AND A SLIDING MEMBER ROTATABLY CARRIED BY SAID HANDLE IN SLIDING ENGAGEMENT WITH SAID UPPER SURFACE OF SAID FILTER CLOTH TO PROGRESSIVELY DEFORM THE FILTER CLOTH OVER THE ENTIRE AREA THEREOF.
Claim 2
Dependent Claim
126 words
AN ELECTRIC VACUUM CLEANER COMPRISING A TOP CASING HAVING A FAN ASSEMBLY, AN EXHAUST PORT, AND AN ANNULAR FLANGE, A BOTTOM CASING HAVING A SUCTION PORT AND ANNULAR SUPPORT, AN ANNULAR PACKING HELD BETWEEN SAID ANNULAR FLANGE AND SAID ANNULAR SUPPORT, A FLEXIBLE FILTER CLOTH SUPPORTED ON SAID ANNULAR PACKING AS A PARTITION BETWEEN SAID TOP AND BOTTOM CASINGS AND HAVING AN UPPER SIDE AND A LOWER SIDE FACING SAID TOP AND BOTTOM CASINGS, RESPECTIVELY, A SUPPORT FRAME DISPOSED BETWEEN SAID FAN ASSEMBLY AND SAID FILTER CLOTH, A HANDLE MEANS MOUNTED ON SAID SUPPORT FRAME, AND A SLIDING MEMBER ROTATABLY CARRIED BY SAID HANDLE IN SLIDING ENGAGEMENT WITH SAID UPPER SURFACE OF SAID FILTER CLOTH TO PROGRESSIVELY DEFORM THE FILTER CLOTH OVER THE ENTIRE AREA THEREOF.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |