US3838558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cushioned lawn mower and grass collector
Assignee: Individual
•
Filing: 1973-03-05
•
Granted: 1974-10-01
•
Expires: 1993-03-05
Abstract
Abstract A lawn mower including inner and outer shrouds and an impeller for developing air pressure between the shrouds sufficient to provide lift. The inner shroud includes means for utilizing inwardly directed airflow for grass ejection and collection.
Inventors
- 👤 D Goodchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
A; A01; A01D; A01D43/00; A01D43/06; A01D43/077; A01D43/0775; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/695; A01D2101/00; Y; Y10; Y10S; Y10S56/00; Y10S56/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A lawn mower comprising: apparatus including a blade for cutting; a first shroud at least partially surrounding said blade; a second shroud at least partially surrounding said first shroud; air impelling means disposed between said shrouds for suspending said apparatus on a cushion of air directed between said first and second shrouds; means extending through said first and second shrouds for collecting matter cut by said blade; and wherein said impelling means and the peripheries of said two shrouds cooperate to direct a portion of the air from between said first and second shrouds upward toward said blade to carry said cut matter into said collecting means.
Claim 2
Dependent Claim
107 words
A lawn mower comprising: apparatus including a blade for cutting; a first shroud at least partially surrounding said blade; a second shroud at least partially surrounding said first shroud; air impelling means disposed between said shrouds for suspending said apparatus on a cushion of air directed between said first and second shrouds; means extending through said first and second shrouds for collecting matter cut by said blade; and wherein said impelling means and the peripheries of said two shrouds cooperate to direct a portion of the air from between said first and second shrouds upward toward said blade to carry said cut matter into said collecting means.
Claim 3
Dependent Claim
22 words
A lawn mower as recited in claim 1 further comprising prime moving means for simultaneously operating said blade and said suspending means.
Claim 4
Dependent Claim
24 words
A lawn mower as recited in claim 2 wherein said collecting means communicates between said blade and an area external to said second shroud.
Claim 5
Dependent Claim
24 words
A lawn mower as recited in claim 3 wherein said colLecting means comprises a hollow member extending from the periphery of said first shroud.
Claim 6
Dependent Claim
21 words
A lawn mower as recited in claim 4 wherein said hollow member extends tangential to the periphery of said first shroud.
Claim 7
Dependent Claim
26 words
A lawn mower as recited in claim 5 further comprising a collection receptacle communicating with said hollow member and said area external to said second shroud.
Claim 8
Dependent Claim
46 words
A lawn mower as recited in claim 6 further comprising: said prime mover mounted on the external surface of said second shroud; said prime mover comprising a shaft extending through said first and second shrouds; and said impeller and said blade axially mounted on said shaft.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |