Patent US4546512A successfully refreshed from Google Patents.
US4546512A
Expired / Lapsed
US
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Mechanical sweeper
Assignee: Leifheit AG
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Filing: 1983-11-29
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Granted: 1985-10-15
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Expires: 2003-11-29
Abstract
Abstract Mechanical sweeper with slotlike bearing bores with introduction slits in partition walls and outwardly open wheel recesses in the housing wherein the drive/running wheels are closed externally with a smooth surface and are retained by check plates and retaining pockets on the partition walls.
Inventors
- 👤 Johannes Liebscher
- 👤 Rolf G. Schulein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:28
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4072; A47L11/32; A47L11/33; A47L11/4036; A47L11/4041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A mechanical sweeper of the type including a housing having two oppositely located lateral walls, brush means connected to the housing, a dirt-collecting receptacle positioned in the housing and means for moving the housing over a surface to be cleaned, comprising: means for supporting the housing on the surface to be cleaned including an assembly having at least one axle with end portions and a wheel mounted on each of said end portions, said wheel having an inner surface including a radially extending projection, the lateral walls each including a slot for removably introducing a respective one of said end portion of said axle into said slot; and oppositely located protrusions, each of said protrusions extending outwardly from a respective one of the lateral walls and being parallel to and spaced from said respective one of the lateral walls, said wheel projection being positioned and confined between a respective one of the lateral walls and protrusions after introduction of said axle into said slot.
Claim 2
Dependent Claim
164 words
A mechanical sweeper of the type including a housing having two oppositely located lateral walls, brush means connected to the housing, a dirt-collecting receptacle positioned in the housing and means for moving the housing over a surface to be cleaned, comprising: means for supporting the housing on the surface to be cleaned including an assembly having at least one axle with end portions and a wheel mounted on each of said end portions, said wheel having an inner surface including a radially extending projection, the lateral walls each including a slot for removably introducing a respective one of said end portion of said axle into said slot; and oppositely located protrusions, each of said protrusions extending outwardly from a respective one of the lateral walls and being parallel to and spaced from said respective one of the lateral walls, said wheel projection being positioned and confined between a respective one of the lateral walls and protrusions after introduction of said axle into said slot.
Claim 3
Dependent Claim
16 words
The sweeper as claimed in claim 1 wherein said wheel has a substantially flat outer surface.
Claim 4
Dependent Claim
63 words
The sweeper as claimed in claim 2 wherein said housing further includes outer walls each extending laterally outwardly from a respective one of the lateral walls and each being substantially parallel to the respective one of the lateral wall and spaced outwardly from said projections, and wherein said housing is recessed in each of said outer walls thereof for accommodating a respective wheel.
Claim 5
Dependent Claim
35 words
The sweeper as claimed in claim 1 wherein each of said slots includes a section in which said axle is retained when mounted on said housing, and wherein said section communicates with said open end.
Claim 6
Dependent Claim
25 words
The sweeper as claimed in claim 4 wherein said slot is L-shaped, said open end forming one, and said section forming the other, leg thereof.
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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |