Patent US4256183A successfully refreshed from Google Patents.
US4256183A
Expired / Lapsed
US
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Dual end rotary tiller blade
Assignee: Individual
•
Filing: 1979-03-08
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Granted: 1981-03-17
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Expires: 1999-03-08
Abstract
Abstract A rotary tiller blade for mounting along with other similar blades, on a driven tiller shaft in a rotary tiller machine, which blade is configured and arranged to provide two cutting teeth per blade which enables a faster, smoother running and more thorough ground breaking action than any other tiller blade design.
Inventors
- 👤 Martin G. Hanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:03
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/08; A01B33/10; A01B33/103
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
A rotary tiller blade for mounting, along with other similar blades, on a driven tiller shaft in a rotary tiller machine, said blade comprising an elongated element with a flattened intermediate section and oppositely directed cutting teeth adjacent the marginal end portions thereof, said marginal end portions being angularly offset relative to the flattened intermediate section of said blade, and said marginal end portions also bent in opposite directions from said intermediate section to provide said oppositely directed cutting teeth, one of said marginal end portions being bent in the area of juncture between the marginal end portion and intermediate section, and the other of said marginal end portions being bent in an opposite direction to said one marginal end portion in an area spaced from the juncture between the other marginal end portion and intermediate section and at an angle thereto.
Claim 2
Dependent Claim
142 words
A rotary tiller blade for mounting, along with other similar blades, on a driven tiller shaft in a rotary tiller machine, said blade comprising an elongated element with a flattened intermediate section and oppositely directed cutting teeth adjacent the marginal end portions thereof, said marginal end portions being angularly offset relative to the flattened intermediate section of said blade, and said marginal end portions also bent in opposite directions from said intermediate section to provide said oppositely directed cutting teeth, one of said marginal end portions being bent in the area of juncture between the marginal end portion and intermediate section, and the other of said marginal end portions being bent in an opposite direction to said one marginal end portion in an area spaced from the juncture between the other marginal end portion and intermediate section and at an angle thereto.
Claim 3
Dependent Claim
46 words
The rotary tiller blade as defined in claim 1 wherein both of said marginal end portions are bent in an area spaced from the juncture between the marginal end portions and the intermediate section, and the angular bend line in said marginal end portions being different
Claim 4
Dependent Claim
44 words
A plurality of rotary tiller blades as defined in claim 1 mounted in groups in predetermined positions along the driven tiller shaft, said groups of rotary tiller blades being mounted in equidistant spacing at approximately 90 degrees relative to one another in each group.
Claim 5
Dependent Claim
28 words
The plurality of rotary tiller blades as defined in claim 3 including four rotary tiller blades mounted in each group to provide eight cutting teeth in each group.
Claim 6
Dependent Claim
35 words
The plurality of rotary tiller blades as defined in claim 4 including four groups of four rotary tiller blades mounted on said driven tiller shaft to provide thirty-two cutting teeth along said driven tiller 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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |