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US3905181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn maintenance equipment
Assignee: Individual
•
Filing: 1974-02-04
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Granted: 1975-09-16
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Expires: 1994-02-04
Abstract
Abstract A rotary lawn mower with various interchangeable parts can be utilized not only as a standard lawn mower but also a vegetation chopper or shredder, a leaf blower or a snow blower. A vacuum attachment is also provided to permit inaccessible areas to be maintained.
Inventors
- 👤 Carlton E Messner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:09
CPC Classifications
A; A01; A01D; A01D42/00; A01D2101/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
150 words
Lawn maintenance equipment comprising: a. a housing having a top wall, sidewalls, and a bottom inlet for air and vegetation; b. a power driven, generally vertically disposed shaft within said housing; c. a cutting blade rotatably mounted on said shaft to sweep a generally horizontal plane above said inlet; d. a chopper blade rotatably mounted on said shaft to sweep a generally horizontal plane above said cutting blade; e. a discharge port for comminuted vegetation; and f. means for effecting the flow of air from said inlet downstream to said port; the improvement which comprises: first baffle means positioned near said inlet and adapted to effect an increase in the rate of said air flow; and second baffle means positioned downstream from said first baffle means and extending generally horizontally between said two planes, said second baffle means adapted to effect an increase in the rate of said air flow.
Claim 2
Dependent Claim
150 words
Lawn maintenance equipment comprising: a. a housing having a top wall, sidewalls, and a bottom inlet for air and vegetation; b. a power driven, generally vertically disposed shaft within said housing; c. a cutting blade rotatably mounted on said shaft to sweep a generally horizontal plane above said inlet; d. a chopper blade rotatably mounted on said shaft to sweep a generally horizontal plane above said cutting blade; e. a discharge port for comminuted vegetation; and f. means for effecting the flow of air from said inlet downstream to said port; the improvement which comprises: first baffle means positioned near said inlet and adapted to effect an increase in the rate of said air flow; and second baffle means positioned downstream from said first baffle means and extending generally horizontally between said two planes, said second baffle means adapted to effect an increase in the rate of said air flow.
Claim 3
Dependent Claim
23 words
The equipment as defined in claim 1 wherein said first baffle means extends generally horizontally between said cutting blade plane and said inlet.
Claim 4
Dependent Claim
24 words
The equipment as defined in claim 1 wherein said first baffle means is a plate covering a portion of the area of said inlet.
Claim 5
Dependent Claim
33 words
The equipment as defined in claim 1 wherein said second baffle means is an annular perforated plate wherein the perforations are of a size sufficient to accommodate the passage of vegetation particles therethrough.
Claim 6
Dependent Claim
17 words
The equipment as defined in claim 1, wherein said second baffle is positioned below said discharge port.
Claim 7
Dependent Claim
46 words
The equipment as defined in claim 1 and wherein said air flow effecting means produces torroidal air movement and said equipment additionally comprising a discharge chute secured to said housing to communicate with said port and positioned to be generallY tangential to said torroidal air movement.
Claim 8
Dependent Claim
37 words
The equipment as defined in claim 1 wherein said second baffle means is spaced closely to said cutter blade and to said chopper blade in a manner to provide a shearing action on vegetation particles passing therethrough.
Claim 9
Dependent Claim
52 words
The equipment as defined in claim 1 and further comprising a vacuum attachment comprising: a. a fitting removably attached to said housing, said fitting having an inlet port and an outlet port, said outlet port being in registration with said inlet; and b. a vacuum hose operatively connected to said inlet port.
Claim 10
Dependent Claim
146 words
The lawn maintenance equipment as defined in claim 1 and in which said chopper blade, said first baffle means and said second baffle means are each individually removably mounted whereby said equipment can be used with just said cutting blade to provide a standard lawn mower, said equipment can be used with just said cutting blade and said chopping blade to provide a chopper or a snowblower, said equipment can be used with said cutting blade, said chopper blade and said first baffle disposed intermediate said cutting blade and said chopper blade to provide a leaf shredder and said equipment can be used with said cutting blade, said chopper blade, said first baffle means disposed intermediate said cutting blade and said chopper blade and said second baffle means disposed on the side of said cutting blade opposite said first baffle means to provide a fine shredder.
Claim 11
Dependent Claim
132 words
Lawn maintenance equipment comprising a housing having a front wall, a rear wall and a top wall, sidewalls, a bottom inlet for air and vegetation and a discharge chute disposed in the upper part of one of said walls, a power driven, generally vertically disposed shaft within said housing, a cutting blade mounted to said shaft in a horizontal plane disposed below said discharge chute, a fan blade fixed to said shaft above said cutting blade to rotate at the same speed as said cutting blade, a baffle mounted to said housing and extending from said front wall generally horizontally between said cutting blade and said fan blade, said baffle being adapted to effect an increase in the rate of air flow and to direct said air flow torroidally in said housing.
Claim 12
Dependent Claim
132 words
Lawn maintenance equipment comprising a housing having a front wall, a rear wall and a top wall, sidewalls, a bottom inlet for air and vegetation and a discharge chute disposed in the upper part of one of said walls, a power driven, generally vertically disposed shaft within said housing, a cutting blade mounted to said shaft in a horizontal plane disposed below said discharge chute, a fan blade fixed to said shaft above said cutting blade to rotate at the same speed as said cutting blade, a baffle mounted to said housing and extending from said front wall generally horizontally between said cutting blade and said fan blade, said baffle being adapted to effect an increase in the rate of air flow and to direct said air flow torroidally in said housing.
Claim 13
Dependent Claim
29 words
The lawn maintenance equipment as defined in claim 10 and including a plate mounted to said housing beneath said cutting blade, said plate being provided with an inlet opening.
Claim 14
Dependent Claim
101 words
Lawn maintenance equipment comprising: a housing having a top wall, sidewalls, and a bottom inlet for air and vegetation, said housing having a central cylindrical inner wall depending downwardly from said top wall to define a cylindrical chamber and an annular chamber between said cylindrical wall and said sidewalls, a shaft extending into said chamber, a fan mounted to said shaft, said fan having blades carried within said annular chamber, said annular chamber and said fan blades being dimensioned to provide relatively close clearance between said blades and the adjacent walls, a cutting blade mounted to said shaft below said fan.
Claim 15
Dependent Claim
101 words
Lawn maintenance equipment comprising: a housing having a top wall, sidewalls, and a bottom inlet for air and vegetation, said housing having a central cylindrical inner wall depending downwardly from said top wall to define a cylindrical chamber and an annular chamber between said cylindrical wall and said sidewalls, a shaft extending into said chamber, a fan mounted to said shaft, said fan having blades carried within said annular chamber, said annular chamber and said fan blades being dimensioned to provide relatively close clearance between said blades and the adjacent walls, a cutting blade mounted to said shaft below said fan.
Claim 16
Dependent Claim
25 words
The lawn maintenance equipment as defined in claim 12 including a discharge opening formed in said housing above said cutting blade and adjacent said fan.
Claim 17
Dependent Claim
45 words
The lawn maintenance equipment as defined in claim 13 and including a substantially semi-circular baffle removably mounted to said housing to extend horizontally between said cutting blade and said fan blades in position to prevent discharge from said cutting blade directly to said discharge chute.
Claim 18
Dependent Claim
31 words
The lawn maintenance equipment as defined in claim 12 and including an annular, perforated plate removably mounted to said housing to extend horizontally between said cutting blade and said fan blades.
Claim 19
Dependent Claim
38 words
The lawn maintenance equipment as defined in claim 15 and including a plate removably mounted to the bottom of said housing below said cutting blade, said plate having an opening to provide an inlet to said cutting blade.
Claim 20
Dependent Claim
34 words
The lawn maintenance equipment as defined in claim 16 and in which said cutting blade is mounted at an angle to the horizontal to rotate closer said plate in the area of said opening.
Claim 21
Dependent Claim
54 words
The lawn maintenance equipment as defined in claim 16 and including a vacuum attachment comprising: a fitting removably attached to said housing, said fitting having an inlet port and an outlet port, said inlet port being in registration with the opening in said plate; and a vacuum hose operatively connected to said inlet port.
Claim 22
Dependent Claim
38 words
The lawn maintenance equipment as defined in claim 12 and including a plate removably mounted to the bottom of said housing below said cutting blade, said plate having an opening to provide an inlet to said cutting blade.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |