Patent US3136107A successfully refreshed from Google Patents.
US3136107A
Expired / Lapsed
US
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Lawn mower sharpener
Assignee: Individual
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Filing: 1962-10-05
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Granted: 1964-06-09
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Spear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:41
CPC Classifications
A; A01; A01D; A01D75/00; A01D75/08; B; B24; B24B; B24B3/00; B24B3/36; B24B3/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A ROTARY LAWN MOWER HAVING A WHEELED HOUSING PROVIDED WITH A PLATE-LIKE TOP WALL AND DEPENDING PERIPHERAL WALLS, A MOTOR MOUNTED ON THE TOP WALL AND HAVING A VERTICAL SHAFT DEPENDING INTO THE HOUSING, AND A SUBSTANTIALLY HORIZONTAL ROTATING BLADE SECURED TO SAID SHAFT IN SAID HOUSING, A GUIDE SLEEVE RIGIDLY SECURED TO SAID TOP WALL AND DEPENDING A SUBSTANTIAL DISTANCE DOWNWARDLY INTO SAID HOUSING ADJACENT THE PATH OF SAID BLADE, A SHARPENING ELEMENT SLIDABLY MOUNTED IN AND PROJECTING BELOW SAID SLEEVE, AND THREADEDLY ADJUSTABLE MEANS CONNECTED BETWEEN THE TOP PORTION OF THE GUIDE SLEEVE AND THE SHARPENING ELEMENT TO ADJUSTABLY SECURE SAID SHARPENING ELEMENT IN SAID SLEEVE SO THAT SAID ELEMENT ENGAGES THE LEADING EDGE OF THE BLADE.
Claim 2
Dependent Claim
120 words
IN A ROTARY LAWN MOWER HAVING A WHEELED HOUSING PROVIDED WITH A PLATE-LIKE TOP WALL AND DEPENDING PERIPHERAL WALLS, A MOTOR MOUNTED ON THE TOP WALL AND HAVING A VERTICAL SHAFT DEPENDING INTO THE HOUSING, AND A SUBSTANTIALLY HORIZONTAL ROTATING BLADE SECURED TO SAID SHAFT IN SAID HOUSING, A GUIDE SLEEVE RIGIDLY SECURED TO SAID TOP WALL AND DEPENDING A SUBSTANTIAL DISTANCE DOWNWARDLY INTO SAID HOUSING ADJACENT THE PATH OF SAID BLADE, A SHARPENING ELEMENT SLIDABLY MOUNTED IN AND PROJECTING BELOW SAID SLEEVE, AND THREADEDLY ADJUSTABLE MEANS CONNECTED BETWEEN THE TOP PORTION OF THE GUIDE SLEEVE AND THE SHARPENING ELEMENT TO ADJUSTABLY SECURE SAID SHARPENING ELEMENT IN SAID SLEEVE SO THAT SAID ELEMENT ENGAGES THE LEADING EDGE OF THE BLADE.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |