US4623366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grid element for lid of a cannister type vacuum cleaner
Assignee: First Union National Bank of North Carolina
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Filing: 1985-09-20
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Granted: 1986-11-18
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Expires: 2005-09-20
Abstract
Abstract A wet/dry cannister-type vacuum cleaner is provided with a plastic grid unit that includes a spherical cup-like main section, an upper annular mounting lip, a short tubular support disposed within the main section with the lower end of the support surrounding a central inlet opening in the latter, and a grid extending across the support at the top thereof and disposed below the mounting lip. The lower end of the support constitutes a seat for a floating ball valve element. An axially extending slot in the support provides a drain for liquid that may be accumulated by the main section at the interior thereof.
Inventors
- 👤 Robert C. Berfield
- 👤 Rudolph W. Wacek
- 👤 Craig Seasholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:50
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L7/0038; A47L7/0042; B01D46/0084; B01D46/42; B01D46/4272; B01D2273/00; B01D2273/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
166 words
A wet/dry vacuum cleaner including: an accumulating tank having a closed bottom and an open top, and a removably assembly for closing that open top; said assembly including suction blower means for generating a stream of working air that extends through said tank, said blower having an inlet opening through which said stream flows, and automatic valve means disposed downstream of said opening to prevent liquid that is picked up by said cleaner and accumulated in said tank from rising to said opening; said valve means including a float and a member defining an annular seat against which said float seals from below when water in said tank reaches a predetermined level below said opening; said member including a mounting portion, and a main portion having an aperture where said seat is disposed; and said main portion including a wall that slopes inwardly and downwardly from said mounting portion to said aperture whereby the latter is disposed substantially below said inlet opening of said blower means.
Claim 2
Dependent Claim
166 words
A wet/dry vacuum cleaner including: an accumulating tank having a closed bottom and an open top, and a removably assembly for closing that open top; said assembly including suction blower means for generating a stream of working air that extends through said tank, said blower having an inlet opening through which said stream flows, and automatic valve means disposed downstream of said opening to prevent liquid that is picked up by said cleaner and accumulated in said tank from rising to said opening; said valve means including a float and a member defining an annular seat against which said float seals from below when water in said tank reaches a predetermined level below said opening; said member including a mounting portion, and a main portion having an aperture where said seat is disposed; and said main portion including a wall that slopes inwardly and downwardly from said mounting portion to said aperture whereby the latter is disposed substantially below said inlet opening of said blower means.
Claim 3
Dependent Claim
20 words
A wet/dry vacuum as set forth in claim 1, in which the main portion is defined by an arcuate generatrix.
Claim 4
Dependent Claim
25 words
A wet/dry vacuum as set forth in claim 2, in which the mounting portion includes an annular lip that extends outwardly from said main portion.
Claim 5
Dependent Claim
23 words
A wet/dry vacuum as set forth in claim 1, in which the main portion is concave when said member is viewed from above.
Claim 6
Dependent Claim
26 words
A wet/dry vacuum as set forth in claim 4, in which the main portion is defined by an arcuate generatrix that is essentially of uniform radius.
Claim 7
Dependent Claim
34 words
A wet/dry vacuum as set forth in claim 1, in which the member also includes a grid disposed above said aperture and a sleeve-like support extending downward from said grid to said main portion.
Claim 8
Dependent Claim
27 words
A wet/dry vacuum as set forth in claim 6, in which there is a drain means in said support disposed in the vicinity of said main portion.
Claim 9
Dependent Claim
22 words
A wet/dry vacuum as set forth in claim 7, in which the drain means includes a longitudinally extending slot in said support.
Claim 10
Dependent Claim
23 words
A wet/dry vacuum as set forth in claim 6, in which the grid is at a level below that of the mounting portion.
Claim 11
Dependent Claim
41 words
A wet/dry vacuum as set forth in claim 1, also including a filter in said stream upstream of said valve means; a cage that supports said filter; and guide means disposed within said cage for directing said float toward said seat.
Claim 12
Dependent Claim
20 words
A wet/dry vacuum as set forth in claim 10, in which the main portion is defined by an arcuate generatrix.
Claim 13
Dependent Claim
23 words
A wet/dry vacuum as set forth in claim 11, in which the main portion is concave when said member is viewed from above.
Claim 14
Dependent Claim
19 words
A wet/dry vacuum as set forth in claim 12, in which the arcuate generatrix is essentially of uniform radius.
Claim 15
Dependent Claim
25 words
A wet/dry vacuum as set forth in claim 13, in which the mounting portion includes an annular lip that extends outwardly from said main portion.
Claim 16
Dependent Claim
34 words
A wet/dry vacuum as set forth in claim 11, in which the member also includes a grid disposed above said aperture and a sleeve-like support extending downward from said grid to said main portion.
Claim 17
Dependent Claim
23 words
A wet/dry vacuum as set forth in claim 15, in which the grid is at a level below that of the mounting portion.
Claim 18
Dependent Claim
27 words
A wet/dry vacuum as set forth in claim 16, in which there is a drain means in said support disposed in the vicinity of said main portion.
Claim 19
Dependent Claim
22 words
A wet/dry vacuum as set forth in claim 17, in which the drain means includes a longitudinally extending slot in said support.
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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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |