Patent US3277512A successfully refreshed from Google Patents.
US3277512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Westinghouse Electric Corp
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Filing: 1964-07-30
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Granted: 1966-10-11
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Robert S Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; A47L5/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
IN A VACUUM CLEANER HAVING A DUST CONTAINER, MOTOR AND MOTOR-DRIVEN FAN: AN AIR CONDUIT ADAPTED TO BE MOVED OVER A SURFACE TO BE CLEANED AND BEING EFFECTIVE TO CHANNEL DIRT-LADEN AIR INTO THE DUST CONTAINER, ROTARY BRUSH MEANS MOUNTED IN SAID AIR CONDUIT, SAID BRUSH BEING EFFECTIVE TO LOOSEN DIRT FROM A SURFACE BEING CLEANED, MEANS INCLUDING A MEMBER MOUNTED ON THE CLEANER AND HAVING AN OPENING THERETHROUGH PROVIDING COMMUNICATION OF SAID DUST CONTAINER WITH THE EXTERIOR OF THE CLEANER AND CONSTITUTING A PARALLEL FLOW PATH WITH THE PATH THROUGH SAID AIR CONDUIT, SAID MEMBER BEING PROVIDED WITH A CIRCUMFERENTIAL SLOT DELINEATED BY A PAIR OF FLEXIBLE WALLS, A SUBSTANTIALLY FLAT MEMBER ADAPTED FOR PIVOTAL MOVEMENT INTO AND OUT OF SAID OPENING THROUGH SAID CIRCUMFERENTIAL SLOT FOR VARYING THE EFFECTIVE AREA OF SAID OPENING TO THEREBY VARY THE QUANTITY OF AIR FLOWING THROUGH SAID AIR CONDUIT, MEANS FOR PIVOTALLY MOUNTING SAID SUBSTANTIALLY FLAT MEMBER INTERMEDIATE SAID FLEXIBLE WALLS, SAID SUBSTANTIALLY FLAT MEMBER HAVING A THICKNESS SLIGHTLY GREATER THAN THE SPACING BETWEEN SAID SLOT DEFINING WALLS WHEREBY SAID WALLS FRICTIONALLY ENGAGE SAID FLAT MEMBER FOR RETENTION THEREOF IN A PREDETERMINED POSITION.
Claim 2
Dependent Claim
191 words
IN A VACUUM CLEANER HAVING A DUST CONTAINER, MOTOR AND MOTOR-DRIVEN FAN: AN AIR CONDUIT ADAPTED TO BE MOVED OVER A SURFACE TO BE CLEANED AND BEING EFFECTIVE TO CHANNEL DIRT-LADEN AIR INTO THE DUST CONTAINER, ROTARY BRUSH MEANS MOUNTED IN SAID AIR CONDUIT, SAID BRUSH BEING EFFECTIVE TO LOOSEN DIRT FROM A SURFACE BEING CLEANED, MEANS INCLUDING A MEMBER MOUNTED ON THE CLEANER AND HAVING AN OPENING THERETHROUGH PROVIDING COMMUNICATION OF SAID DUST CONTAINER WITH THE EXTERIOR OF THE CLEANER AND CONSTITUTING A PARALLEL FLOW PATH WITH THE PATH THROUGH SAID AIR CONDUIT, SAID MEMBER BEING PROVIDED WITH A CIRCUMFERENTIAL SLOT DELINEATED BY A PAIR OF FLEXIBLE WALLS, A SUBSTANTIALLY FLAT MEMBER ADAPTED FOR PIVOTAL MOVEMENT INTO AND OUT OF SAID OPENING THROUGH SAID CIRCUMFERENTIAL SLOT FOR VARYING THE EFFECTIVE AREA OF SAID OPENING TO THEREBY VARY THE QUANTITY OF AIR FLOWING THROUGH SAID AIR CONDUIT, MEANS FOR PIVOTALLY MOUNTING SAID SUBSTANTIALLY FLAT MEMBER INTERMEDIATE SAID FLEXIBLE WALLS, SAID SUBSTANTIALLY FLAT MEMBER HAVING A THICKNESS SLIGHTLY GREATER THAN THE SPACING BETWEEN SAID SLOT DEFINING WALLS WHEREBY SAID WALLS FRICTIONALLY ENGAGE SAID FLAT MEMBER FOR RETENTION THEREOF IN A PREDETERMINED POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |