US4245456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary lawnmower with grass clearing means
Assignee: Individual
•
Filing: 1979-04-03
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Granted: 1981-01-20
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Expires: 1999-04-03
Abstract
Abstract A rotary lawnmower of the hovering air cushion type, or of conventional design, is provided with a grass clearing plate which is preferably mounted on the front of the mower and projects a distance therefrom whereby a part of the mower housing and the grass clearing plate together provide a loading surface for the cut grass. The mowing and cut grass clearing operations occur at the same time, thus eliminating a separate after treatment of the cut lawn.
Inventors
- 👤 Heinz Zipfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/06; A01D43/063; A01D2101/00; A01D34/00; A01D34/01; A01D34/412; A01D34/63; Y; Y10; Y10S; Y10S56/00; Y10S56/01; Y10S56/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
139 words
A rotary lawnmower provided with a housing having an outer surface and rotary blade therein, said rotary blade having at least one tip for cutting grass, said grass cut by said blade forming an accumulation between the tip of said rotary blade and an inner wall of the right-hand side of the housing as viewed from above, said housing having a portion extending at least partially below the level of the tip of said blade which comprises at least one grass clearing plate located on the outer housing surface and in the front thereof, viewed in the direction of movement of said lawnmower, for collecting said accumulated cut grass on a part of said outer housing surface remote from said inner wall upon a subsequent movement of the lawnmower to directly engage said accumulation by said grass clearing plate.
Claim 2
Dependent Claim
139 words
A rotary lawnmower provided with a housing having an outer surface and rotary blade therein, said rotary blade having at least one tip for cutting grass, said grass cut by said blade forming an accumulation between the tip of said rotary blade and an inner wall of the right-hand side of the housing as viewed from above, said housing having a portion extending at least partially below the level of the tip of said blade which comprises at least one grass clearing plate located on the outer housing surface and in the front thereof, viewed in the direction of movement of said lawnmower, for collecting said accumulated cut grass on a part of said outer housing surface remote from said inner wall upon a subsequent movement of the lawnmower to directly engage said accumulation by said grass clearing plate.
Claim 3
Dependent Claim
74 words
A lawnmower as claimed in claim 1 wherein said outer housing is provided with a forward front part and wherein said grass clearing plate projects upwardly from said outer housing surface at a distance from said forward front part, viewed in the direction of movement, of said lawnmower such that the housing outer surface between the front of said housing and said grass clearing plate forms a loading surface area for said cut grass.
Claim 4
Dependent Claim
18 words
A lawnmower as claimed in claim 1 wherein said grass clearing plate is integral with said lawnmower housing.
Claim 5
Dependent Claim
19 words
A lawnmower as claimed in claim 1 wherein said grass clearing plate is detachably mounted on said lawnmower housing.
Claim 6
Dependent Claim
39 words
A lawnmower as claimed in claim 1 wherein said lawnmower housing adjacent to said grass clearing plate is provided with a flattened, slightly downward sloping smooth edge which extends over at least part of the width of said housing.
Claim 7
Dependent Claim
48 words
A lawnmower as claimed in claim 5 wherein said means for ejecting cut grass is on one side of the housing constituting said grass ejection side, and said flattened smooth edge extends over about a third of the width of said housing adjacent to said grass ejection side.
Claim 8
Dependent Claim
46 words
A lawnmower as claimed in claim 5 wherein on the rear side of said housing the length of the smooth edge thereof is flattened over the full width of said housing and equals approximately 10 cm on said rear side of the housing of said lawnmower.
Claim 9
Dependent Claim
31 words
A lawnmower as claimed in claim 1 wherein said grass clearing plate, viewed in the direction of movement of said lawnmower, is substantially crescent-shaped and concave in said direction of movement.
Claim 10
Dependent Claim
52 words
A lawnmower as claimed in claim 1 which is wheeless and elevated from the ground by means of an air cushion, further comprising a push handle, and means on each side of said housing for mounting said handle so that the latter is adjustable in the length direction of said lawnmower housing.
Claim 11
Dependent Claim
38 words
A lawnmower as claimed in claim 9 further comprising two spaced pairs of push handle mountings on both sides of said lawnmower housing which are located on opposite sides of the center of gravity line of said lawnmower.
Claim 12
Dependent Claim
43 words
A lawnmower as claimed in claim 10 further comprising a round member connecting each adjacent push handle mounting, said push handle being mounted on said round member to thereby be capable of continuously adjusting the position of said handle to selected fixed positions.
Claim 13
Dependent Claim
20 words
A lawnmower as claimed in claim 1 wherein the rate of revolution of said lawnmower blade is approximately 3,000 rpm.
Claim 14
Dependent Claim
27 words
A lawnmower as claimed in claim 1 wherein said rotary blade is sharpened on each free end over at least one third of each half blade length.
Claim 15
Dependent Claim
45 words
A lawnmower as claimed in claim 13 wherein said rotary blade is provided with a pivot for rotation thereabout and each side of the blade that is sharpened has a continuous cutting edge in the blade rotation direction from its pivot to its free 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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |