US3775951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Brinkmann Corp
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Filing: 1971-10-20
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Granted: 1973-12-04
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Expires: 1991-10-20
Abstract
Abstract A heavy duty vacuum cleaner of the upright tank type having a cover with a motor impeller combination mounted therein that draws air from the container through a filter cartridge. A ball valve is freely received in the filter cartridge and closes under the buoyant force of water in the tank when filled to terminate the suction effect of the impeller at that time. Also provided is a straight intake tube mounted vertically in the cover that extends within the tank to a position below the filter so that it directs incoming materials or foreign matter to the bottom of the container and not directly to the filter.
Inventors
- 👤 A Eicholz
- 👤 Cambridge J Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L7/0038; A47L7/0042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A vacuum cleaner assembly, comprising; a tank, an inlet in said housing, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into tank, a motor driving said impeller and having a housing projecting above said removable cover, said housing having vents therein, a cover plate spaced above said vents and carried by the motor housing, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fitting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge being constructed to serve as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet projecting upwardly and communicating with the interior of the manifold, said manifold being tapered from the impeller to the outlet.
Claim 2
Dependent Claim
188 words
A vacuum cleaner assembly, comprising; a tank, an inlet in said housing, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into tank, a motor driving said impeller and having a housing projecting above said removable cover, said housing having vents therein, a cover plate spaced above said vents and carried by the motor housing, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fitting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge being constructed to serve as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet projecting upwardly and communicating with the interior of the manifold, said manifold being tapered from the impeller to the outlet.
Claim 3
Dependent Claim
163 words
A vacuum cleaner assembly, comprising; a tank, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into the tank, a motor driving said impeller and having a housing projecting above said removable cover, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fiTting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge being constructed to serve as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet communicating with the interior of the manifold, said manifold being tapered from the impeller to the outlet.
Claim 4
Dependent Claim
163 words
A vacuum cleaner assembly, comprising; a tank, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into the tank, a motor driving said impeller and having a housing projecting above said removable cover, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fiTting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge being constructed to serve as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet communicating with the interior of the manifold, said manifold being tapered from the impeller to the outlet.
Claim 5
Dependent Claim
141 words
A vacuum cleaner assembly, comprising; a tank, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into the tank, a motor driving said impeller, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fitting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge serving as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet communicating with the interior of the manifold.
Claim 6
Dependent Claim
141 words
A vacuum cleaner assembly, comprising; a tank, a removable cover on said tank, an impeller supported by said removable cover having an inlet facing downwardly into the tank, a motor driving said impeller, a seal surrounding the inlet to the impeller, a supporting ring concentric with and surrounding said seal, a removable filter cartridge held by said supporting ring including an upper resilient ring snugly fitting over said supporting ring, an annular array of pleated filter material extending downwardly from said upper resilient ring, a bottom plate extending horizontally across the bottom of the filter material defining an enclosure therein, a ball valve within said enclosure, said cartridge serving as the only guide for said ball valve, an exhaust manifold surrounding said impeller and being defined in part by said cover, and an outlet communicating with the interior of the manifold.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |