US3203161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary lawn mower cutting unit
Assignee: Individual
•
Filing: 1963-05-10
•
Granted: 1965-08-31
•
Expires: 1983-05-10
Abstract
No abstract record available.
Inventors
- 👤 John H Breisch
- 👤 Arnold E Biermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A GRASS CUTTING ELEMENT FOR A ROTARY LAWN MOWER HAVING A WHEELED HOUSING AND VERTICAL DRIVE SHAFT EXTENDING INTO SAID HOUSING, SAID CUTTING ELEMENT BEING ADAPTED TO BE AFFIXED TO SAID DRIVE SHAFT AND COMPRISING A ROTOR HAVING A CENTRAL FLAT SECTION, A FRUSTO-CONICAL PORTION EXTENDING OUTWARDLY AND DOWNWARDLY FROM SAID CENTRAL FLAT SECTION, A PLURALITY OF RECESSES FORMED IN THE FRUSTO-CONICAL SECTION, SAID RECESSES BEING ABOVE THE CONICAL PLANE, A CUTTER BLADE FOR EACH RECESS, SAID BLADE HAVING AN OFF-SET SHANK IN THE RECESS, AND PIVOTALLY MOUNTED THEREIN, THE CUTTER PORTION OF THE BLADE BEING EXPOSED BELOW THE LOW SURFACE OF THE ROTOR.
Claim 2
Dependent Claim
104 words
A GRASS CUTTING ELEMENT FOR A ROTARY LAWN MOWER HAVING A WHEELED HOUSING AND VERTICAL DRIVE SHAFT EXTENDING INTO SAID HOUSING, SAID CUTTING ELEMENT BEING ADAPTED TO BE AFFIXED TO SAID DRIVE SHAFT AND COMPRISING A ROTOR HAVING A CENTRAL FLAT SECTION, A FRUSTO-CONICAL PORTION EXTENDING OUTWARDLY AND DOWNWARDLY FROM SAID CENTRAL FLAT SECTION, A PLURALITY OF RECESSES FORMED IN THE FRUSTO-CONICAL SECTION, SAID RECESSES BEING ABOVE THE CONICAL PLANE, A CUTTER BLADE FOR EACH RECESS, SAID BLADE HAVING AN OFF-SET SHANK IN THE RECESS, AND PIVOTALLY MOUNTED THEREIN, THE CUTTER PORTION OF THE BLADE BEING EXPOSED BELOW THE LOW SURFACE OF THE ROTOR.
References Cited (Backward Citations)
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US2875569A
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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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |