US3597902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utility vaccum cleaner
Assignee: Scott Fetzer Co
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Filing: 1968-11-13
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Granted: 1971-08-10
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Expires: 1988-11-13
Abstract
Abstract A utility vacuum cleaner having a two-piece housing including an upper portion forming a lid for a lower-canister portion in which dirt is directly collected. The lid portion is an integrally formed unit providing a mounting for a motor fan unit and means for attaching a filter element thereto. The lid portion further provides an upwardly directed outlet from an increased pressure chamber formed between the motor fan unit and the inner surface of the lid. The filter unit provides a spring-biased framework for supporting a cloth baglike filter to prevent the collapse thereof when air is drawn therethrough. The lower canister is characterized by a baffled inlet arranged to prevent the inlet flow of collected dirt and dust particles from directly impinging against the filter unit and to promote the even distribution of the collected particles around the canister portion by spiraling the dirt laden airstream in the canister.
Inventors
- 👤 Clyde H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:33
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/16; A47L9/165; A47L9/12; A47L9/125; A47L9/1658; A47L9/1666
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
235 words
In a utility vacuum cleaner, a bucketlike container having an upstanding cylindrical sidewall formed with an inlet opening in said sidewall, and an integral cover and suction unit superjacent said container and carried thereby, said unit comprising a lid comprising a top wall and a sidewall of circular cross section and formed with a centrally disposed cylindrical flange depending from said top wall into the interior of said container concentrically inwardly of said sidewall, a motor of the suction unit secured to said top wall inwardly of said flange and a fan housing of the suction unit sealed against the end of said flange to form a sealed outlet chamber interiorly of said flange, said suction unit having a bag filter secured about said fan housing, said top wall having formed therein an outlet opening having an axially extending cylindrical flange disposed to radially overlie at least in part said outlet chamber and extending inwardly into said outlet chamber at least in part, and a wall in said lid extending across said outlet opening radially, said last-mentioned wall having formed therein a grid with portions of the grid in register with said outlet chamber being apertured to form through air passages, the axially extending flange in said outlet chamber being lanced to form additional slotted through air passages, thereby forming a screened outlet opening through which filtered air may be discharged without admitting foreign objects.
Claim 2
Dependent Claim
235 words
In a utility vacuum cleaner, a bucketlike container having an upstanding cylindrical sidewall formed with an inlet opening in said sidewall, and an integral cover and suction unit superjacent said container and carried thereby, said unit comprising a lid comprising a top wall and a sidewall of circular cross section and formed with a centrally disposed cylindrical flange depending from said top wall into the interior of said container concentrically inwardly of said sidewall, a motor of the suction unit secured to said top wall inwardly of said flange and a fan housing of the suction unit sealed against the end of said flange to form a sealed outlet chamber interiorly of said flange, said suction unit having a bag filter secured about said fan housing, said top wall having formed therein an outlet opening having an axially extending cylindrical flange disposed to radially overlie at least in part said outlet chamber and extending inwardly into said outlet chamber at least in part, and a wall in said lid extending across said outlet opening radially, said last-mentioned wall having formed therein a grid with portions of the grid in register with said outlet chamber being apertured to form through air passages, the axially extending flange in said outlet chamber being lanced to form additional slotted through air passages, thereby forming a screened outlet opening through which filtered air may be discharged without admitting foreign objects.
Claim 3
Dependent Claim
73 words
In a utility vacuum cleaner as defined in claim 1, said inlet opening extending into an annular space remaining between said integral cover and suction unit and said sidewall of said container, said inlet opening comprising an elbow-shaped baffle to direct the stream of dirt laden air tangentially into the annular space, whereby particles of dirt are prevented from directlY impinging against the suction unit and will be gravitationally directed into the container.
Claim 4
Dependent Claim
38 words
In a utility vacuum cleaner as defined in claim 1, wherein said bag filter is a cylindrical filter bag surrounding a coiled compression spring to hold the bag in shape against airflow forces tending to collapse the bag.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |