US4866565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner electrostatic build up control system
Assignee: NIL-FISK ADVANCE AS
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Filing: 1989-01-13
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Granted: 1989-09-12
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Expires: 2009-01-13
Abstract
Abstract A wire molded into the wall of a vacuum cleaner hose and having electrical conductivity through the vacuum cleaning system by metal to metal conduct and additionally being provided with a grounding cable connected to an external ground bar for dissipating any electrostatic charges built up in the vacuum cleaning system. The vacuum cleaning tools used with the system are at least partially fabricated of static discharging materials in order to further prevent static build-up in the vacuum cleaning system.
Inventors
- 👤 Charles C. Wray, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2889; A47L9/24; A47L9/248; A47L9/2857; H; H05; H05F; H05F3/00; H05F3/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A static discharge protected system comprising a vacuum cleaning machine, a vacuum cleaning conductive hose assembly and at least one metal wand connected to said vacuum cleaning machine, said hose being provided with a wire molded in the wall of said hose, an electrically conductive ferrule at opposite ends of said hose assembly being connected to said wire in order to maintain uninterrupted electrical conductivity from said vacuum system to the free end of said metal wand, a tool removably attached to the free end of said metal wand having at least part which is fabricated of a static dissipating material, and a means for separately grounding at least part of said hose assembly.
Claim 2
Dependent Claim
114 words
A static discharge protected system comprising a vacuum cleaning machine, a vacuum cleaning conductive hose assembly and at least one metal wand connected to said vacuum cleaning machine, said hose being provided with a wire molded in the wall of said hose, an electrically conductive ferrule at opposite ends of said hose assembly being connected to said wire in order to maintain uninterrupted electrical conductivity from said vacuum system to the free end of said metal wand, a tool removably attached to the free end of said metal wand having at least part which is fabricated of a static dissipating material, and a means for separately grounding at least part of said hose assembly.
Claim 3
Dependent Claim
42 words
A static discharge protected system as claimed in claim 1 wherein said means for separately grounding is a wire connected at one end to one of said electrically conductive ferrules and is provided with a grounding bar at the other end thereof.
Claim 4
Dependent Claim
17 words
A static discharge protected system as claimed in claim 1 wherein said electrically conductive ferrule is metal.
Claim 5
Dependent Claim
24 words
A static discharge protected system as claimed in claim 1 wherein said wire molded in the wall of said hose is stranded copper wire.
Claim 6
Dependent Claim
120 words
A static discharge protected system comprising a vacuum cleaning machine, a vacuum cleaning conductive hose assembly and at least one metal wand connected to said vacuum cleaning machine, said hose being provided with a wire molded in the wall of said hose, an electrically conductive ferrule at opposite ends of said hose assembly being connected to said wire in order to maintain uninterrupted electrical conductivity from said vacuum system to the free end of said metal wand, a tool removably attached to the free end of said metal wand having a cover which is fabricated of a static dissipating polycarbonate material, and a grounding wire connected to one of said ferrules for grounding at least part of said hose assembly.
Claim 7
Dependent Claim
120 words
A static discharge protected system comprising a vacuum cleaning machine, a vacuum cleaning conductive hose assembly and at least one metal wand connected to said vacuum cleaning machine, said hose being provided with a wire molded in the wall of said hose, an electrically conductive ferrule at opposite ends of said hose assembly being connected to said wire in order to maintain uninterrupted electrical conductivity from said vacuum system to the free end of said metal wand, a tool removably attached to the free end of said metal wand having a cover which is fabricated of a static dissipating polycarbonate material, and a grounding wire connected to one of said ferrules for grounding at least part of said hose assembly.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |