Patent US2441564A successfully refreshed from Google Patents.
US4445245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface sweeper
Assignee: Individual
•
Filing: 1982-08-23
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Granted: 1984-05-01
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Expires: 2002-08-23
Abstract
Abstract A miniature electrically powered surface sweeper having a rotary brush element which is adapted to come in direct contact with a surface to be cleaned. The brush element is disposed within a housing having a curved inner wall surface which contacts the bristles as the same move inwardly within the housing to prevent loss of dust particles. A receptacle element is provided with a movable trap opened by the moving of an electrical switch to closed position to power the brush element, and closed when the switch is opened to discontinue operation of the brush element. The brush element includes bristles which are formed of cutting a planar sheet of synthetic resinous material to form flat bristles attached to a base, the base being in turn attached to an outer surface of a rotating drum member to permit convenient replacement.
Inventors
- 👤 Ning K. Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/24; A47L5/26; A46; A46B; A46B13/00; A46B13/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A miniature surface sweeper comprising: a housing element having a wall defining a curvilinear inner surface; a dust receptacle disposed at a part of said housing element opposite said wall, said receptacle being removable for emptying; a rotary brush element including a cylindrical surface disposed between said wall and said dust receptacle, and having flexible bristles thereon in the form of a comblike member, the base of which is secured to said cyclindrical surface, said housing element having an intake opening through which the tips of bristles may project to directly engage collected particles; and means for driving said brush element to rotate the same in the direction delivering collected particles along said curvilinear surface to said dust receptacle; said driving means including an electric motor and a power source therefor; said dust receptacle having a closable trap, said power source including a manually movable electric switch coupled to said trap for simultaneous movement, wherein moving said switch to closed position serves to open said trap.
Claim 2
Dependent Claim
166 words
A miniature surface sweeper comprising: a housing element having a wall defining a curvilinear inner surface; a dust receptacle disposed at a part of said housing element opposite said wall, said receptacle being removable for emptying; a rotary brush element including a cylindrical surface disposed between said wall and said dust receptacle, and having flexible bristles thereon in the form of a comblike member, the base of which is secured to said cyclindrical surface, said housing element having an intake opening through which the tips of bristles may project to directly engage collected particles; and means for driving said brush element to rotate the same in the direction delivering collected particles along said curvilinear surface to said dust receptacle; said driving means including an electric motor and a power source therefor; said dust receptacle having a closable trap, said power source including a manually movable electric switch coupled to said trap for simultaneous movement, wherein moving said switch to closed position serves to open said trap.
Claim 3
Dependent Claim
45 words
A sweeper in accordance with claim 1, further characterized in a provision of bristle elements which are cut to flat comb-like configuration, wherein the bristles thereof are in staggered relation, and in which the base thereof is secured to said cylinder in a spiral fashion.
References Cited (Backward Citations)
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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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |