Patent US4760271A successfully refreshed from Google Patents.
US4053962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction-cleaning dust retriever
Assignee: Rexair Inc
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Filing: 1975-12-16
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Granted: 1977-10-18
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Expires: 1995-12-16
Abstract
Abstract A vacuum-cleaner nozzle attachment comprises an elongated tube having an oblong cross-sectional shape over an outer, working section thereof and a round cross-sectional shape over an inner section. At an outer working tip thereof an opening defines an angle of more than 20° but not more than 60° with an axis of elongation of the tube. An attaching portion at an opposite end of the elongated tube has a wall which forms tapered, stepped cavities which can be force fitted onto various size vacuum-cleaner nozzles. The two sections can be forced fitted together. In one embodiment, the angled opening does not extend over the entire cross-sectional area of the tube, but rather only over a portion thereof and the remaining portion has an opening formed therein which is perpendicular to the axis of elongation. In another embodiment, the remaining portion is covered rather than being open. In a further embodiment of the invention an elbow attachment can be force fitted to the outer working tip of the elongated tube. An attaching portion of the elbow has an oblong cross-sectional shape to mate with the oblong section of the tube, and a working portion thereof has a rectangular shape.
Inventors
- 👤 Robert V. McDowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:01
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A vacuum-cleaner hose attachment comprising: an attaching portion having walls for defining an open cavity having a circular cross-sectional shape, said open cavity being of a size for receiving a hose member from a vacuum cleaner, said walls forming a tapered, stepped cavity for force fitting onto hose members of various sizes from vacuum cleaners; and an elongated tube rigidly connected to said attaching portion with a bore thereof communicating with said attaching-portion cavity, said elongated tube including a working-end portion, said working-end portion having an oblong cross-sectional shape taken in a plane perpendicular to its axis of elongation such that it includes long sidewalls and shorter endwalls, said working-end portion's outer tip defining an opening therein the periphery of which defines a plane having an angle of more than 20°, but not more than 60° with the axis of elongation and extending approximately perpendicular to said long sidewalls.
Claim 2
Dependent Claim
149 words
A vacuum-cleaner hose attachment comprising: an attaching portion having walls for defining an open cavity having a circular cross-sectional shape, said open cavity being of a size for receiving a hose member from a vacuum cleaner, said walls forming a tapered, stepped cavity for force fitting onto hose members of various sizes from vacuum cleaners; and an elongated tube rigidly connected to said attaching portion with a bore thereof communicating with said attaching-portion cavity, said elongated tube including a working-end portion, said working-end portion having an oblong cross-sectional shape taken in a plane perpendicular to its axis of elongation such that it includes long sidewalls and shorter endwalls, said working-end portion's outer tip defining an opening therein the periphery of which defines a plane having an angle of more than 20°, but not more than 60° with the axis of elongation and extending approximately perpendicular to said long sidewalls.
Claim 3
Dependent Claim
24 words
A vacuum-cleaner hose attachment as in claim 1 wherein said elongated tube is formed of two detachable sections which may be force fitted together.
Claim 4
Dependent Claim
55 words
A vacuum-cleaner hose attachment as in claim 2 wherein a first section of said elongated tube has a round cross-sectional shape and wherein said second section has said oblong cross-sectional shape over most of the length thereof, but which has a circular cross-sectional shape for mating with the circular cross-sectional shape of said first section.
Claim 5
Dependent Claim
24 words
A vacuum-cleaner hose attachment as in claim 1 wherein the periphery of said opening forms approximately a 30° angle with said axis of elongation.
Claim 6
Dependent Claim
29 words
A vacuum-cleaner hose attachment as in claim 1 wherein said periphery of said opening having an angle does not extend over the entire cross section of said working-end portion.
Claim 7
Dependent Claim
26 words
A vacuum-cleaner hose attachment as in claim 5 wherein another portion of said working-end portion's outer tip defines a plane perpendicular to the axis of elongation.
Claim 8
Dependent Claim
14 words
A vacuum-cleaner hose attachment as in claim 5 wherein said another portion is covered.
Claim 9
Dependent Claim
167 words
A vacuum-cleaner hose attachment comprising: an attaching portion having walls for defining an open cavity having a circular cross-sectional shape, said open cavity being of a size for receiving a hose member from a vacuum cleaner, said attaching portion including an attaching means for holding said hose member in said cavity; and an elongated tube rigidly connected to said attaching portion with a bore thereof communicating with said attaching-portion cavity, said elongated tube including a working-end portion, said working-end portion having an oblong cross-sectional shape taken in a plane perpendicular to its axis of elongation such that it includes long sidewalls and shorter endwalls, said working-end portion's outer tip having an opening therein the periphery of which defines a plane having an angle of more than 20°, but not more than 60° with the axis of elongation and extending approximately perpendicular to said long sidewalls, and another portion which defines a plane perpendicular to the plane of elongation, said another portion of said outer tip being covered.
Claim 10
Dependent Claim
167 words
A vacuum-cleaner hose attachment comprising: an attaching portion having walls for defining an open cavity having a circular cross-sectional shape, said open cavity being of a size for receiving a hose member from a vacuum cleaner, said attaching portion including an attaching means for holding said hose member in said cavity; and an elongated tube rigidly connected to said attaching portion with a bore thereof communicating with said attaching-portion cavity, said elongated tube including a working-end portion, said working-end portion having an oblong cross-sectional shape taken in a plane perpendicular to its axis of elongation such that it includes long sidewalls and shorter endwalls, said working-end portion's outer tip having an opening therein the periphery of which defines a plane having an angle of more than 20°, but not more than 60° with the axis of elongation and extending approximately perpendicular to said long sidewalls, and another portion which defines a plane perpendicular to the plane of elongation, said another portion of said outer tip being covered.
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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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |