US3940827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leaf vacuuming attachment for rotary lawn mowers
Assignee: Individual
•
Filing: 1974-04-18
•
Granted: 1976-03-02
•
Expires: 1994-04-18
Abstract
Abstract Conventional rotary lawn mowers have a rotating cutter blade traveling at high velocity. This invention relates to an attachment for forming an enclosed housing containing the conventional mower components to create a vacuum chamber with a single input port which may be coupled to a flexible conduit to suck up leaves and other debris within an extended area for collection in conventional bags.
Inventors
- 👤 Salvatore T. Greco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
A; A01; A01D; A01D42/00; A01D42/06; A01D2101/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
A leaf vacuuming attachment for rotary lawn mowers which include a horizontal cutting blade rotating within an inverted housing with a circumferential vertical side wall containing a discharge port therethrough that is substantially tangential to said side wall, said attachment comprising: a closure pan having a circumferential vertical side wall substantially conforming to that of said housing, the upper edge portion of said pan side wall being configured for butting contact with the lower edge of said housing side wall; an input port in said pan side wall; and means for fastening said edges together to form an enclosed housing for said cutting blade, with said input port being below said cutting blade and rotated at least 90° upstream of said discharge port relative to the direction of rotation of said cutting blade.
Claim 2
Dependent Claim
133 words
A leaf vacuuming attachment for rotary lawn mowers which include a horizontal cutting blade rotating within an inverted housing with a circumferential vertical side wall containing a discharge port therethrough that is substantially tangential to said side wall, said attachment comprising: a closure pan having a circumferential vertical side wall substantially conforming to that of said housing, the upper edge portion of said pan side wall being configured for butting contact with the lower edge of said housing side wall; an input port in said pan side wall; and means for fastening said edges together to form an enclosed housing for said cutting blade, with said input port being below said cutting blade and rotated at least 90° upstream of said discharge port relative to the direction of rotation of said cutting blade.
Claim 3
Dependent Claim
71 words
A leaf vacuuming attachment as defined in claim 1, wherein the outer periphery of said pan side wall at the upper edge is slightly less than the inner periphery of said housing wall at the lower edge, said pan side wall including an external shoulder about the periphery and below the edge, said shoulder being held in engagement with the lower edge of said housing side wall by said fastening means.
Claim 4
Dependent Claim
45 words
A leaf vacuuming attachment as defined in claim 1, wherein the bottom surface of said closure pan includes a circumferentially extending trough of graduated depth, said trough being deepest in the vicinity of said input port and having a floor ascending towards said discharge port.
Claim 5
Dependent Claim
71 words
A leaf vacuuming attachment as defined in claim 3, wherein the outer periphery of said pan side wall at the upper edge is slightly less than the inner periphery of said housing wall at the lower edge, said pan side wall including an external shoulder about the periphery and below the edge, said shoulder being held in engagement with the lower edge of said housing side wall by said fastening means.
Claim 6
Dependent Claim
18 words
A leaf vacuuming attachment as defined in claim 1, further comprising a conduit coupled to said input port.
Claim 7
Dependent Claim
14 words
A leaf vacuuming attachment as defined in claim 5, wherein said conduit is flexible.
Claim 8
Dependent Claim
33 words
A leaf vacuuming attachment as defined in claim 5, wherein said conduit has a flexible section proximate to its coupling to said input port and a rigid section at the remote end thereof.
Claim 9
Dependent Claim
71 words
A leaf vacuuming attachment as defined in claim 5, wherein the outer periphery of said pan side wall at the upper edge is slightly less than the inner periphery of said housing wall at the lower edge, said pan side wall including an external shoulder about the periphery and below the edge, said shoulder being held in engagement with the lower edge of said housing side wall by said fastening means.
Claim 10
Dependent Claim
45 words
A leaf vacuuming attachment as defined in claim 8, wherein the bottom surface of said closure pan includes a circumferentially extending trough of graduated depth, said trough being deepest in the vicinity of said input port and having a floor ascending towards said discharge port.
Claim 11
Dependent Claim
31 words
A leaf vacuuming attachment as defined in claim 1, wherein said input port is rotated 180° upstream of said discharge port relative to the direction of rotation of said cutting blade.
References Cited (Backward Citations)
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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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |