Patent US3780504A successfully refreshed from Google Patents.
US3780504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lawn mower
Assignee: Individual
•
Filing: 1972-03-20
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Granted: 1973-12-25
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Expires: 1992-03-20
Abstract
Abstract A rotary-type lawn mower having a housing and three cutter heads, each of which includes a blade mounted to rotate about a vertical axis, are mounted in triangular relation within the housing. One of the cutter heads is located along the longitudinal center line of the housing while the other cutter heads are located forwardly and laterally outward of the central cutter head. Wheels are mounted on opposite sides of the housing and the wheels are positioned so that the cutting zone of each forward cutter head is located a substantial distance ahead and laterally outward of the respective wheel. A third pivotable wheel is attached to the rear end of the housing to said in steering.
Inventors
- 👤 F Haseloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:55
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/67; A01D34/68; A01D34/685; A01D34/835; A01D34/86; A01D34/863; A01D2101/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
228 words
A lawn mower, comprising a housing including a main housing section and a pair of generally cylindrical outer housing sections that communicate with said main section; each of said outer housing sections being located laterally outward and forwardly of the main housing section, the forward extremity of the main housing section being located to the rear of the forward extremities of the outer housing sections to provide the housing with a central forwardly facing recess, a central cutter head located within the forward portion of the main housing section and including a blade mounted for rotation on a vertical shaft, a pair of outer cutter heads with each outer cutter head being disposed in an outer housing section and each outer cutter head including a blade mounted for rotation on a vertical shaft, a pair of wheels journalled on opposite sides of the main housing section with each wheel located to the rear of the corresponding outer housing section, each outer housing section extending a substantial distance laterally outward of the corresponding wheel and extending forwardly from the corresponding wheel in the direction of mower travel, a third wheel mounted on the main housing section and located to the rear of said pair of wheels, and drive means carried by the housing and operably connected to the vertical shaft of each cutter head to drive the respective blades.
Claim 2
Dependent Claim
228 words
A lawn mower, comprising a housing including a main housing section and a pair of generally cylindrical outer housing sections that communicate with said main section; each of said outer housing sections being located laterally outward and forwardly of the main housing section, the forward extremity of the main housing section being located to the rear of the forward extremities of the outer housing sections to provide the housing with a central forwardly facing recess, a central cutter head located within the forward portion of the main housing section and including a blade mounted for rotation on a vertical shaft, a pair of outer cutter heads with each outer cutter head being disposed in an outer housing section and each outer cutter head including a blade mounted for rotation on a vertical shaft, a pair of wheels journalled on opposite sides of the main housing section with each wheel located to the rear of the corresponding outer housing section, each outer housing section extending a substantial distance laterally outward of the corresponding wheel and extending forwardly from the corresponding wheel in the direction of mower travel, a third wheel mounted on the main housing section and located to the rear of said pair of wheels, and drive means carried by the housing and operably connected to the vertical shaft of each cutter head to drive the respective blades.
Claim 3
Dependent Claim
35 words
The lawn mower of claim 1, wherein said drive means includes a prime mover and a belt drive mechanism operably connecting the output of the prime mover with the shafts of the respective cutter heads.
Claim 4
Dependent Claim
26 words
The lawn mower of claim 1, wherein the axes of the wheels are located to the rear of the vertical shaft of the central cutter head.
Claim 5
Dependent Claim
25 words
The lawn mower of claim 1, and including pivotal means for pivotally connecting said third wheel to the rear portion of the main housing section.
Claim 6
Dependent Claim
26 words
The lawn mower of claim 4, wherein said pivotal means includes a pair of generally horizontal outwardly extending legs, and a handle connected to said legs.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |