US3757503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawnmower and grass collector
Assignee: Individual
•
Filing: 1972-05-04
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Granted: 1973-09-11
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Expires: 1992-05-04
Abstract
Abstract The specification describes a lawnmower having a motor driven grass cutting and centrifuging rotor operating into an openbottom casing having an outlet passage for blowing cut grass and mulch carrying air into a collecting box. The collector box has an open face greater than the outlet of the passage and amply circumscribing the same. Screen means are located in the area of said open face obout said outlet for holding back the grass from the air flow reversed in said collector and passing through said screen means, and downwardly deviated and open passages are provided downstream of said screen means in said area for deviating and exhausting on the ground the air and mulch escaping from the collector.
Inventors
- 👤 T Soldavini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:28
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/06; A01D43/063; A01D2101/00; A01D34/00; A01D34/01; A01D34/412; A01D34/63
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
218 words
A lawn mower comprising a wheel-supported lawn mower body including an open-bottom substantially cylindrical casing adapted to house a rotor having grass cutting and air centrifugal blades, said casing having a substantially tangential passage provided with an outlet opening for issue of a cut grass and mulch carrying centrifugated air stream therefrom; motor means carried by said body for driving the rotor; a cut grass collector box having an open end facing and closely adjacent said outlet opening of said passage, said open end of said box being defined by an end edge of the box which encompasses an area considerably greater than that of said outlet opening of said passage, said box having top, bottom and side walls impervious to air; screen means apertured for the passage of air and mulch carried by the air stream but for holding back the cut grass, positioned to cover that part of said area of said open end of said box which is larger than the area of said outlet opening of said casing; and means on the side of said screen means facing away from the open end of said box for directing the stream of air and the mulch passing through said screen means out of said box downwardly towards the ground over which the lawn mower moves.
Claim 2
Dependent Claim
218 words
A lawn mower comprising a wheel-supported lawn mower body including an open-bottom substantially cylindrical casing adapted to house a rotor having grass cutting and air centrifugal blades, said casing having a substantially tangential passage provided with an outlet opening for issue of a cut grass and mulch carrying centrifugated air stream therefrom; motor means carried by said body for driving the rotor; a cut grass collector box having an open end facing and closely adjacent said outlet opening of said passage, said open end of said box being defined by an end edge of the box which encompasses an area considerably greater than that of said outlet opening of said passage, said box having top, bottom and side walls impervious to air; screen means apertured for the passage of air and mulch carried by the air stream but for holding back the cut grass, positioned to cover that part of said area of said open end of said box which is larger than the area of said outlet opening of said casing; and means on the side of said screen means facing away from the open end of said box for directing the stream of air and the mulch passing through said screen means out of said box downwardly towards the ground over which the lawn mower moves.
Claim 3
Dependent Claim
122 words
A lawn mower as defined in claim 1, wherein said lawn mower body has opposite ends and at one of its ends a substantially upright end member having an inner edge defining said outlet opening of said passage and an outer edge substantially matching said end edge of said box, and wherein means for directing the stream of air and the mulch contained therein downwardly comprises a groove extending into said end member between said inner and said outer edge and having at least one downwardly open end, said screen covering said groove at the side thereof facing away from said end member and said end edge of said open end of said box engaging said outer edge of said end member.
Claim 4
Dependent Claim
22 words
A lawn mower as defined in claim 2, wherein said inner and said outer edges are located in a substantially vertical plane.
Claim 5
Dependent Claim
34 words
A lawn mower as defined in claim 2, wherein said collector box is hingedly mounted on said end member for rotation about a substantially horizontal axis adjacent to an upper portion of said member.
Claim 6
Dependent Claim
73 words
A lawnmower and grass collector as defined in claim 4, wherein the said lawnmower comprises a motor driven and steerable vehicle having accomodations for carrying the operator thereon and therewith, lever means positioned for actuation thereof by the accomodated operator, and link means connecting such lever means to said hingedly supported collector box for raising such box up to cause the grass collected thereinto to fall therefrom upon actuation of said lever means.
Claim 7
Dependent Claim
32 words
A lawn mower as defined in claim 5, wherein said end member is integrally formed with the front end of said vehicle and said collector box projects forwardly of said front end.
Claim 8
Dependent Claim
25 words
A lawn mower as defined in claim 4, wherein said collector box is hingedly and detachably connected to the upper portion of said end member.
Claim 9
Dependent Claim
39 words
A lawn mower as defined in claim 4, wherein said lawn mower comprises a handlebar extending upwardly and rearwardly from said lawn mower body, and wherein said collector box is hingedly connected to a rear end of said body.
Claim 10
Dependent Claim
59 words
A lawn mower as defined in claim 2, wherein said outer edge of said end member is spaced upwardly and laterally to both sides of said inner edge thereof and wherein said groove comprises two substantially vertically downwardly extending groove portions open at their lower ends and a connecting portion connecting the upper ends of said two groove portions.
Claim 11
Dependent Claim
50 words
A lawn mower as defined in claim 1, whereIn the area of said open end of said box is greater than the area of a cross section through said box in any plane parallel to said open end and wherein said walls of said box diverge toward said open end.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |