US4095535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary harrows
Assignee: C Van der Lely NV
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Filing: 1977-02-14
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Granted: 1978-06-20
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Expires: 1997-02-14
Abstract
Abstract A soil cultivating implement or rotary harrow has a row of soil-working members rotatably mounted on upwardly extending shafts. Driving means rotates the shafts and tools, preferably tines, are moved through the soil to work same. Fluid material from a container on a supporting structure is passed in the worked soil through injectors located adjacent the soil-working member. The injectors can be included with each soil-working member and can comprise one or more tine injectors. The injectors extend into the ground and conduct fluid through ducts and passages from the container into the ground. A roller at the rear of the injectors smooths the worked soil.
Inventors
- 👤 Ary van der Lely
- 👤 Cornelis Johannes Gerardus Bom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:29
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/02; A01B; A01B49/00; A01B49/04; A01B49/06; A01B49/065
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A soil cultivating implement or rotary harrow comprising a frame and a plurality of rotatable soil working members arranged in a transverse row, said members being supported and positioned on a portion of said frame to work overlapping strips of soil during operation, driving means engaging said soil working members and rotating same about corresponding upwardly extending shafts that define the axes of rotation of the soil working members, each soil working member comprising a substantially horizontal support and at least one downwardly extending tine depending from said support adjacent a lateral end thereof, said support mounting injector means that introduces fluid material into the soil being worked by said tine, said injector means comprising an elongated ejector that extends downwardly substantially parallel to said tine and said ejector being detachably connected to said support with fastening means located below the support, said ejector member having an internal conduit that communicates with a bore in the corresponding shaft and said bore extending throughout the length of said shaft.
Claim 2
Dependent Claim
168 words
A soil cultivating implement or rotary harrow comprising a frame and a plurality of rotatable soil working members arranged in a transverse row, said members being supported and positioned on a portion of said frame to work overlapping strips of soil during operation, driving means engaging said soil working members and rotating same about corresponding upwardly extending shafts that define the axes of rotation of the soil working members, each soil working member comprising a substantially horizontal support and at least one downwardly extending tine depending from said support adjacent a lateral end thereof, said support mounting injector means that introduces fluid material into the soil being worked by said tine, said injector means comprising an elongated ejector that extends downwardly substantially parallel to said tine and said ejector being detachably connected to said support with fastening means located below the support, said ejector member having an internal conduit that communicates with a bore in the corresponding shaft and said bore extending throughout the length of said shaft.
Claim 3
Dependent Claim
32 words
A harrow as claimed in claim 1, wherein said injector is fastened to a central lower portion of said support by a releaseable nut that engages the lower end of said shaft.
Claim 4
Dependent Claim
32 words
A harrow as claimed in claim 1, wherein a tine depends from each lateral end of the support, said ejector being substantially circular in cross section and tapering towards a lowermost tip.
Claim 5
Dependent Claim
27 words
A harrow as claimed in claim 3, wherein said conduit has a longitudinal center axis that coincides with the axis of rotation of the soil working member.
Claim 6
Dependent Claim
24 words
A harrow as claimed in claim 1, wherein said injector has a length which is at least half the length of said one tine.
Claim 7
Dependent Claim
172 words
A soil cultivating implement or rotary harrow comprising a frame and a plurality of rotatable soil working members, positioned in a row that extends transverse to the direction of travel, said members being supported on a portion of said frame to work overlapping strips of soil during operation, driving means engaging said soil working members and rotating same about corresponding upwardly extending shafts that define the axes of rotation of said members, at least one soil working member comprising a substantially horizontal support and downwardly extending tine means spaced from the axis of rotation of said soil working member, downwardly extending conduit means mounted on said member that injects fluid material into the soil adjacent the lower end of said tine means, said conduit means extending substantially parallel to said tine means and being detachably connected to said support, said conduit means communicating with a fluid bore in a respective shaft, the longitudinal axis of said conduit means being substantially parallel to the axis of rotation of the corresponding soil working member.
Claim 8
Dependent Claim
172 words
A soil cultivating implement or rotary harrow comprising a frame and a plurality of rotatable soil working members, positioned in a row that extends transverse to the direction of travel, said members being supported on a portion of said frame to work overlapping strips of soil during operation, driving means engaging said soil working members and rotating same about corresponding upwardly extending shafts that define the axes of rotation of said members, at least one soil working member comprising a substantially horizontal support and downwardly extending tine means spaced from the axis of rotation of said soil working member, downwardly extending conduit means mounted on said member that injects fluid material into the soil adjacent the lower end of said tine means, said conduit means extending substantially parallel to said tine means and being detachably connected to said support, said conduit means communicating with a fluid bore in a respective shaft, the longitudinal axis of said conduit means being substantially parallel to the axis of rotation of the corresponding soil working member.
Claim 9
Dependent Claim
36 words
A harrow as claimed in claim 6, wherein said conduit means is located internally of said tine means and said support has laterally extending channel means that communicates fluid from said bore to the conduit means.
Claim 10
Dependent Claim
36 words
A harrow as claimed in claim 7, wherein the opposite ends of said support are each connected to a tine and each tine is an injector with a respective conduit in communication with said channel means.
Claim 11
Dependent Claim
51 words
A harrow as claimed in claim 8, wherein a lower active portion of each tine is in trailing relationship with the normal direction of rotation of its corresponding soil-working member, said active portion having an outlet for fluid materials in a rear side thereof with respect to said direction of rotation.
Claim 12
Dependent Claim
54 words
A harrow as claimed in claim 8, wherein an upper end of said shaft has a connecting member which establishes communication with a duct leading to a fluid container carried by said harrow, said connecting member and said shaft being journalled to one another and being relatively freely rotatable with respect to one another.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |