Patent US3863291A successfully refreshed from Google Patents.
US3863291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible rotary lawn mower and air blower
Assignee: Jacobsen Manufacturing Co
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Filing: 1973-11-26
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Granted: 1975-02-04
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Expires: 1993-11-26
Abstract
Abstract A convertible rotary lawn mower and air blower including a mower housing having wheels for movably supporting the housing on the ground and having an engine supported on the housing. The housing has an outer depending skirt, and it has a circular wall spaced radially inwardly from the skirt, such that the skirt and the wall define an air channel in the housing. Air inlet openings are in the housing and permit air to flow from above the housing and into the air channel, and an air-fanning blade in the channel moves the air around the channel and out an air outlet opening in the housing. A cover is removably positioned below the housing to be air tight therewith at the lower edge of the skirt for confining the flow of air around the channel and defining the bottom of the air channel and thus converting the mower to an air blower, and an air chute is attachable to the housing at the air outlet opening for directing the outlet of the air.
Inventors
- 👤 Neill C Woelffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:04
CPC Classifications
A; A01; A01D; A01D42/00; A01D42/06; A01D2101/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
225 words
A convertible rotary lawn mower and air blower, comprising a rotary lawn mower housing including a top portion and including a skirt portion depending from said top portion and extending along the periphery of said housing and having an air outlet opening therein and terminating in a lower edge extending along a horizontal plane, a circular wall depending from said top portion and spaced radially inwardly from said skirt portion and defining an air channel with said skirt portion, a prime mover mounted on said housing, an air-fanning member supportedly mounted on said prime mover and being rotated thereby and including air-fanning blades disposed in said air channel for movement of air through said air channel and out said air outlet opening upon rotation of said air-fanning member, said housing top portion having air inlet opening therein disposed at locations spaced radially inwardly from said circular wall for the flow of air into said housing and into said air channel and out said air outlet opening, and a cover removably attached to said housing and extending fully across said skirt portion to be air-tight therewith at said lower edge thereof and defining the bottom of said air channel and enclosing the bottom of said housing to confine the flow of air in said air channel and thereby convert the rotary mower into an air blower.
Claim 2
Dependent Claim
225 words
A convertible rotary lawn mower and air blower, comprising a rotary lawn mower housing including a top portion and including a skirt portion depending from said top portion and extending along the periphery of said housing and having an air outlet opening therein and terminating in a lower edge extending along a horizontal plane, a circular wall depending from said top portion and spaced radially inwardly from said skirt portion and defining an air channel with said skirt portion, a prime mover mounted on said housing, an air-fanning member supportedly mounted on said prime mover and being rotated thereby and including air-fanning blades disposed in said air channel for movement of air through said air channel and out said air outlet opening upon rotation of said air-fanning member, said housing top portion having air inlet opening therein disposed at locations spaced radially inwardly from said circular wall for the flow of air into said housing and into said air channel and out said air outlet opening, and a cover removably attached to said housing and extending fully across said skirt portion to be air-tight therewith at said lower edge thereof and defining the bottom of said air channel and enclosing the bottom of said housing to confine the flow of air in said air channel and thereby convert the rotary mower into an air blower.
Claim 3
Dependent Claim
42 words
The convertible rotary lawn mower and air blower as claimed in claim 1, including an air chute attached to said housing and extending in air-flow communication with said air outlet opening for confining and directing the flow of air from said housing.
Claim 4
Dependent Claim
49 words
The convertible rotary lawn mower and air blower as claiMed in claim 1, wherein said cover is a sheet piece extending on a flat plane and includes an extension on one edge thereof and disposed underneath said air outlet opening to define the bottom of said air outlet opening.
Claim 5
Dependent Claim
69 words
The convertible rotary lawn mower and air blower as claimed in claim 3, wherein said cover is circularly shaped in its edge beyond said extension, said cover including ribs extending therealong underneath the flat plane of said cover and with said ribs being elongated in the fore-and-aft direction of said mower, and the peripheral portion of said cover having openings therein for attachment of said cover to said housing.
Claim 6
Dependent Claim
78 words
The convertible rotary lawn mower and air blower as claimed in claim 3, and including an air chute attached to said housing and extending in air-flow communication with said air outlet opening for confining and directing the flow of air from said housing, and including a handle attached to said housing for guiding and directing said housing along the ground and thereby directing the outlet flow of air from said chute and to desired locations on the ground.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |