US3899029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary harrows
Assignee: Individual
•
Filing: 1973-05-03
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Granted: 1975-08-12
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Expires: 1993-05-03
Abstract
Abstract A rotary harrow has a forward coupling frame for connection to a prime mover and a rear coupling member. Upper and lower arms link the coupling frame to the rear coupling member and form a parallelogram linkage. A frame portion has upright shafts journalled therein with depending soil working members that extend across the width of the frame portion. A soil smoothing roller is pivotally connected at the rear of the harrow to support same, at least in part, and two hoppers are mounted above the soil working members. A rotary delivery mechanism in each hopper is driven by a take off from the roller to dispense material in front of the soil working members. The frame portion with soil working members as well as the roller, can each can pivot on the parallelogram linkage to move vertically, matching undulations of the ground independently of the forward coupling frame.
Inventors
- 👤 Der Lely Ary Van
- 👤 Cornelis Johannes Gerardus Bom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:39
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/06; A01B33/065; A01B49/00; A01B49/04; A01B49/06; A01B49/065; A01B59/00; A01B59/06; A01B63/00; A01B63/14; A01B63/24; A01C; A01C7/00; A01C7/08; A01C7/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
132 words
A rotary harrow comprising frame means including a forward coupling frame and a transverse frame portion supporting a plurality of tines soil working members, drive means connected to said soil working members to rotate same about upwardly extending axes, said transverse frame portion being interconnected to linkage means and the latter including said forward coupling frame, said frame portion being pivotally coupled to said forward coupling frame and vertically displaceable relative to said coupling frame, the rear of said linkage means being affixed to said frame portion, a soil contacting supporting member located to the rear of said frame portion and said supporting member being adjustably fastened to said frame portion, said frame portion together with said supporting member being vertically displaceable to match ground undulations independently of said forward coupling frame.
Claim 2
Dependent Claim
132 words
A rotary harrow comprising frame means including a forward coupling frame and a transverse frame portion supporting a plurality of tines soil working members, drive means connected to said soil working members to rotate same about upwardly extending axes, said transverse frame portion being interconnected to linkage means and the latter including said forward coupling frame, said frame portion being pivotally coupled to said forward coupling frame and vertically displaceable relative to said coupling frame, the rear of said linkage means being affixed to said frame portion, a soil contacting supporting member located to the rear of said frame portion and said supporting member being adjustably fastened to said frame portion, said frame portion together with said supporting member being vertically displaceable to match ground undulations independently of said forward coupling frame.
Claim 3
Dependent Claim
39 words
A harrow as claimed in claim 1, wherein at least one hopper is supported on said frame means above said frame portion and delivery members extenD down from said hopper to a location forward of said soil working members.
Claim 4
Dependent Claim
21 words
A harrow as claimed in claim 2, wherein said hopper extends throughout substantially half the lateral width of said frame portion.
Claim 5
Dependent Claim
22 words
A harrow as claimed in claim 2, wherein two hoppers are supported on said frame means and said hoppers are located side-by-side.
Claim 6
Dependent Claim
43 words
A harrow as claimed in claim 1, wherein two hoppers are supported on said frame means above the frame portion and a delivery mechanism is rotatably mounted in said hopper, a drive for operating said mechanism being in driving connection with said roller.
Claim 7
Dependent Claim
32 words
A harrow as claimed in claim 5, wherein said drive comprises transmission members that extend between said two hoppers to a common shaft means and said shaft means comprises said delivery mechanism.
Claim 8
Dependent Claim
32 words
A harrow as claimed in claim 1, wherein, when viewed inside elevation, there are two forward and two rearward corners of said linkage means which are respectively located in substantially vertical alignment.
Claim 9
Dependent Claim
29 words
A harrow as claimed in claim 7, wherein, when viewed in plan, an upper arm of said linkage means is located between two horizontally spaced apart lower arms thereof.
Claim 10
Dependent Claim
26 words
A harrow as claimed in claim 8, wherein said upper and lower arms of the linkage means normally extend substantially parallel to the direction of travel.
Claim 11
Dependent Claim
47 words
A harrow as claimed in claim 9, wherein the leading ends of said upper and lower arms are pivotally connected to a forward coupling element of said coupling frame and said coupling element has connection points for a three-point lifting device or hitch of an agricultural tractor.
Claim 12
Dependent Claim
48 words
A harrow as claimed in claim 10, wherein the rear ends of said arms are pivotally connected to plate means affixed to said frame portion and said plate means has connection means for a further three-point connection thereto of a further implement at the rear of the harrow.
Claim 13
Dependent Claim
37 words
A harrow as claimed in claim 1, wherein flexible means interconnects said coupling frame to another portion of said linkage means to limit movements of said frame portion in a downward direction relative to said coupling frame.
Claim 14
Dependent Claim
27 words
A harrow as claimed in claim 12, wherein said flexible means comprises at least one chain that is secured between said coupling frame and said frame portion.
Claim 15
Dependent Claim
14 words
A harrow as claim in claim 1, wherein said supporting member is a roller.
Claim 16
Dependent Claim
48 words
A harrow as claimed in claim 14, wherein said roller is pivotally connected to said frame portion with an adjusting mechanism and fixable in any of a plurality of settings with respect to said frame portion, whereby the working depths of said soil working members can be regulated.
Claim 17
Dependent Claim
21 words
A harrow as claimed in claim 15, wherein said roller extends throughout substantially the whole transverse width of said frame portion.
Claim 18
Dependent Claim
126 words
A rotary harrow comprising frame means including a forward coupling frame, a rear coupling frame member and a transverse frame portion, said frame portion supporting a plurality of tined soil working members, drive means connected to said soil working members to rotate same about upwardly extending axes, said frame portion being interconnected to a linkage means and the latter including said forward and said rear coupling frame, said frame portion being pivotally coupled to said forward coupling frame and having at least one fixed connection to said rear coupling frame member, a supporting roller being connected in fixed relationship to said frame portion at the rear thereof, whereby said roller and frame portion are vertically displaceable to match ground undulations independently of the forward coupling frame.
Claim 19
Dependent Claim
126 words
A rotary harrow comprising frame means including a forward coupling frame, a rear coupling frame member and a transverse frame portion, said frame portion supporting a plurality of tined soil working members, drive means connected to said soil working members to rotate same about upwardly extending axes, said frame portion being interconnected to a linkage means and the latter including said forward and said rear coupling frame, said frame portion being pivotally coupled to said forward coupling frame and having at least one fixed connection to said rear coupling frame member, a supporting roller being connected in fixed relationship to said frame portion at the rear thereof, whereby said roller and frame portion are vertically displaceable to match ground undulations independently of the forward coupling frame.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |