US4133972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner hose having an electrical conductor
Assignee: Electrolux AB
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Filing: 1977-01-19
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Granted: 1979-01-09
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Expires: 1997-01-19
Abstract
Abstract A vacuum cleaner hose having an electrical conductor for a motor driven work tool. The hose includes an inner and outer tube having a spacing therebetween which has been so chosen as to permit the electrical conductor therein to move relatively freely therebetween. The desirable result of the construction is that the vacuum cleaner hose is easier to handle and bend and at the same time the electrical conductor is carried within the hose and is not subject to the exposure of bare conductor wires due to wear.
Inventors
- 👤 John N. J. Andersson
- 👤 Harry K. G. Karlen
- 👤 Lennart A. U. Ulfhielm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/127; A; A47; A47L; A47L9/00; A47L9/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A vacuum cleaner hose comprising an inner flexible tube and an outer flexible tube, at least one electrical conductor arranged in a space between said tubes in a spiral configuration, said inner and outer tubes having diameters that are so chosen that said electrical conductor freely moves both longitudinally and laterally in the space between said tubes, said electrical conductor thereby being not subject to stretching forces when said hose is bent out of a linear configuration, and said hose being provided with spacing means located in said space between said inner and outer tubes which engage said electrical conductor at selected locations for maintaining the spiral configuration of said electrical conductor.
Claim 2
Dependent Claim
112 words
A vacuum cleaner hose comprising an inner flexible tube and an outer flexible tube, at least one electrical conductor arranged in a space between said tubes in a spiral configuration, said inner and outer tubes having diameters that are so chosen that said electrical conductor freely moves both longitudinally and laterally in the space between said tubes, said electrical conductor thereby being not subject to stretching forces when said hose is bent out of a linear configuration, and said hose being provided with spacing means located in said space between said inner and outer tubes which engage said electrical conductor at selected locations for maintaining the spiral configuration of said electrical conductor.
Claim 3
Dependent Claim
23 words
A vacuum cleaner hose as claimed in claim 1 wherein said spiral forms a single turn along the entire length of said hose.
Claim 4
Dependent Claim
24 words
A vacuum cleaner hose as claimed in claim 1 wherein said spiral forms more than one turn along the entire length of said hose.
Claim 5
Dependent Claim
22 words
A vacuum cleaner hose as claimed in claim 1 wherein said spacing means are radial elevations projecting from either of said tubes.
Claim 6
Dependent Claim
30 words
A vacuum cleaner hose as claimed in claim 1 wherein said spacing means constitutes a spacing spring arranged in the space concentrically with said spiral configuration of said electrical conductor.
Claim 7
Dependent Claim
52 words
A vacuum cleaner hose as claimed in claim 1 wherein said tubes are flexible plastic, and at least one of said tubes is provided with reinforcing thread wound in the shape of a spiral and having a pitch which is considerably smaller than the pitch of said conductor having a spiral configuration.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |