US3818532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweeper
Assignee: Leifheit International GmbH
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Filing: 1972-11-17
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Granted: 1974-06-25
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Expires: 1992-11-17
Abstract
Abstract A sweeper for rugs and carpets has a housing supported on a frame, a side of which faces the carpet or rug to be swept and is provided with recesses in which the shafts of one or more rotary brushes and/or of various supporting wheels for the housing are journalled for rotation. These recesses are bridged and closed by self-retaining closure members.
Inventors
- 👤 G Leifheit
- 👤 J Liebscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:20
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/32; A47L11/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
In a sweeper, particularly a sweeper for rugs and carpets, a combination comprising a housing; a frame supporting said housing and having a side facing a surface to be swept and being provided with journalling recesses; at least one rotary brush means having a mounting axle; a plurality of supporting wheel means also having mounting axles, the axles of at least one ofsaid means being freely received and journalled for rotation in said recesses; axle-retaining closure members extending across and closing said recesses at said side of said frame; and cooperating snap-coupling portions on said closure members and said frame for releasably connecting the former to the latter.
Claim 2
Dependent Claim
108 words
In a sweeper, particularly a sweeper for rugs and carpets, a combination comprising a housing; a frame supporting said housing and having a side facing a surface to be swept and being provided with journalling recesses; at least one rotary brush means having a mounting axle; a plurality of supporting wheel means also having mounting axles, the axles of at least one ofsaid means being freely received and journalled for rotation in said recesses; axle-retaining closure members extending across and closing said recesses at said side of said frame; and cooperating snap-coupling portions on said closure members and said frame for releasably connecting the former to the latter.
Claim 3
Dependent Claim
42 words
A combination as defined in claim 1, said recesses having journalling depressions each in part accommodating one of said axles; and wherein said closure members have supporting portions which extend in part into the respective depressions for supporting said axles against displacement.
Claim 4
Dependent Claim
45 words
A combination as defined in claim 1, the coupling portions on said frame comprising single coupling members; and wherein said coupling portions on said closure members comprise respective sets of dual coupling members adapted to embrace and clampingly engage one of said single coupling members.
Claim 5
Dependent Claim
50 words
A combination as defined in claim 3, said closure members having openings located intermediate the dual coupling members of the respective sets for insertion of a tool from the exterior of said housing, so as to deflect said dual coupling members out of engagement with the respective single coupling member.
Claim 6
Dependent Claim
67 words
A combination as defined in claim 1, wherein said wheel means comprise at least two wheels which are respectively positioned in the region of the opposite ends of said axle of said brush means; and wherein said closure members are shells each of which closes a recess accommodating the axles of a respective group and provided with openings through which the wheels of the respective group extend.
Claim 7
Dependent Claim
39 words
A combination as defined in claim 1, said frame comprising vertical guide portions; and further comprising a bracket being vertically displaceable along said guide portions, said bracket being provided with some of said journalling recesses for said brush means.
Claim 8
Dependent Claim
25 words
A combination as defined in claim 6, said closure members having portions extending under the end regions of said brush means and provided with depressions.
Claim 9
Dependent Claim
45 words
A combination as defined in claim 1, wherein at least the recesses at one end of said brush means are elongated in the direction normal to the elongation of said mounting axle of said brush means and parallel to the plane of the said frame.
Claim 10
Dependent Claim
32 words
A combination as defined in claim 1, said frame being of one piece; and further comprising connecting portions provided along the periphery of said frame for connecting the latter to said housing.
Claim 11
Dependent Claim
30 words
A combination as defined in claim 9, said connection portions being openings; and further comprising a plurality of undercut projections provided on said housing and receivable in the respective openings.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |