Patent US5755007A successfully refreshed from Google Patents.
US5755007A
Expired / Lapsed
US
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Portable cleaning apparatus
Assignee: Dyson Technology Ltd
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Filing: 1994-11-24
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Granted: 1998-05-26
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Expires: 2014-11-24
Abstract
Abstract A portable cleaning apparatus (10) for use with stair treads (20) is described. The apparatus includes a recess (30) which is raised away from the stair tread and is supported on either side of the recess by the body (12) so that the recess is not in contact with the stair tread.
Inventors
- 👤 James Dyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:19
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36; A47L5/367
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A portable cleaning apparatus comprising a body having a lower surface, first and second portions of the lower surface as a part of the body, and an upwardly extending recess for accommodating a stair tread wherein the apparatus rests on a first stair tread on the first portion of the lower surface of the body adjacent the recess and rests on a second stair tread on the second portion of the lower surface of the body at an end of the apparatus opposite the first portion of the body with the recess between the first and second portions of the body, wherein the recess is out of contact with the stair treads.
Claim 2
Dependent Claim
112 words
A portable cleaning apparatus comprising a body having a lower surface, first and second portions of the lower surface as a part of the body, and an upwardly extending recess for accommodating a stair tread wherein the apparatus rests on a first stair tread on the first portion of the lower surface of the body adjacent the recess and rests on a second stair tread on the second portion of the lower surface of the body at an end of the apparatus opposite the first portion of the body with the recess between the first and second portions of the body, wherein the recess is out of contact with the stair treads.
Claim 3
Dependent Claim
20 words
The apparatus as claimed in claim 1, wherein the first and second portions comprise angular edges on the lower surface.
Claim 4
Independent Claim
43 words
The apparatus as claimed in any one of claims 1 or 2, wherein the recess is substantially symmetrical about an axis generally perpendicular to the lower surface in side view between the first and second portions of the lower surface of the body.
Claim 5
Independent Claim
35 words
The apparatus as claimed in any one of claims 1 or 2, wherein the recess is substantially a triangle in side view between the first and second portions of the lower surface of the body.
Claim 6
Independent Claim
71 words
The apparatus as claimed in any one of claims 1 or 2, wherein the recess is substantially a triangle in side view between the first and second portions of the lower surface of the body and wherein an apex of the triangle is positioned substantially centrally of the recess and comprises a right angle in the side view between the first and second portions of the lower surface of the body.
Claim 7
Independent Claim
50 words
The apparatus as claimed in any one of claims 1 or 2, wherein the first and second portions of the lower surface have wheels which are disengaged from the stair tread when the first and second portions of the lower surface of the body are mounted on the stair treads.
Claim 8
Independent Claim
20 words
The apparatus as claimed in any one of claims 1 or 2, wherein the apparatus is a cyclonic vacuum cleaner.
Claim 9
Independent Claim
90 words
The apparatus as claimed in any one of claims 1 or 2 wherein the recess is substantially symmetrical in cross-section about an axis generally perpendicular to the lower surface in side view between the first and second portions of the lower surface to provide a triangle and wherein the first and second portions of the lower surface of the body are provided with wheels which are disengaged from the stair treads when the first and second portions of the lower surface of the body are mounted on the stair treads.
Claim 10
Independent Claim
90 words
The apparatus as claimed in any one of claims 1 or 2 wherein an apex of a triangle is positioned substantially centrally of the recess and comprises a right angle in side view between the first and second portions of the lower surface of the body and wherein the first and second portions of the lower surface of the body are provided with wheels which are disengaged from the stair treads when the first and second portions of the lower surface of the body are mounted on the stair treads.
Claim 11
Independent Claim
92 words
The apparatus as claimed in any one of claims 1 or 2 wherein the recess is substantially symmetrical in cross-section about an axis generally perpendicular in side view between the first and second lower surfaces to provide a triangle and wherein the first and second portions of the lower surface of the body are provided with wheels which are disengaged from the stair treads when the first and second portions of the lower surface of the body are mounted on the stair treads and wherein the apparatus is a cyclonic vacuum cleaner.
Claim 12
Independent Claim
95 words
The apparatus as claimed in any one of claims 1 or 2 wherein an apex of a triangle is positioned substantially centrally of the recess and comprises a right angle in side view between the first and second portions of the lower surface of the body, wherein the first and second lower surfaces of the body are provided with wheels which are disengaged from the stair treads when the first and second portions of the lower surface of the body are mounted on the stair treads and wherein the apparatus is a cyclonic vacuum cleaner.
References Cited (Backward Citations)
GB658328A
Cited
US3820808A
Cited
US4357177A
Cited
FR2639817A1
Cited
US5263223A
Cited
DE9302645U1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |