USRE33822E - Hinge-type offset wheel harrow - Google Patents
Hinge-type offset wheel harrow Download PDFInfo
- Publication number
- USRE33822E USRE33822E US06/567,900 US56790084A USRE33822E US RE33822 E USRE33822 E US RE33822E US 56790084 A US56790084 A US 56790084A US RE33822 E USRE33822 E US RE33822E
- Authority
- US
- United States
- Prior art keywords
- harrow
- units
- unit
- drawbar
- leading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/14—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors
- A01B63/16—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors with wheels adjustable relatively to the frame
- A01B63/22—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements drawn by animals or tractors with wheels adjustable relatively to the frame operated by hydraulic or pneumatic means
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B21/00—Harrows with rotary non-driven tools
- A01B21/08—Harrows with rotary non-driven tools with disc-like tools
Definitions
- the present invention has for its objective to provide a simpler and more efficient harrow of the type which includes two pivotally connected gang disc units and attendant adjusting means. More particularly, it is an object of the invention to simplify the means for adjusting the operative angle between the leading and trailing pivoted harrow units and for shifting them into parallel locked relationship for transport.
- Another object and feature of the invention is to provide an improved, simplified and more efficient arrangement for shifting the harrow bodily between its transport and soil working positions in relation to a towing vehicle, such as a farm tractor.
- the rear harrow unit is equipped with a pair of transport wheels having power means to raise and lower them relative to the rear unit.
- the front harrow unit is equipped with a pivoted drawbar and associated power means to swing the drawbar on a transverse horizontal pivot axis relative to the front unit.
- a draft tongue carried by it bears down on the hitch of the towing vehicle and the resulting reaction raises the front harrow unit.
- Two fluid circuits are involved, one for the raising and lowering of the harrow and one for adjusting the angle between the front and rear harrow assemblies or units.
- FIG. 1 is a plan view of a harrow embodying the present invention in its soil-working mode.
- FIG. 2 is a plan view of the harrow in its transport mode.
- FIG. 3 is a fragmentary side elevation of the harrow, partly in section, in the soil-working mode.
- FIG. 4 is a similar view showing the harrow in an intermediate elevated position.
- FIG. 5 is a similar view of the harrow in the completely elevated transport position.
- FIG. 6 is a fragmentary perspective view of one pivoted transport wheel and associated power cylinder.
- FIG. 7 is a fragmentary perspective view of a drawbar and associated components.
- a hinge type harrow comprises leading and trailing harrow units 10 and 11 each having a main elongated frame member 12, such as a rectangular cross section tube member of suitable length. Attached dependingly to each member 12 through conventional support arm means 13 are gangs of harrow discs 14 or other harrow-type soil workers, such as harrow teeth. The gange of discs 14 are mounted on common support shafts 15 carried by the arm means 13.
- the disc harrow units 10 and 11 per se are conventional and need not be described in greater detail. The essence of the present invention now to be described resides in means to manipulate the units 10 and 11 in certain modes.
- the frame members 12 of the two disc harrow units are pivotally coupled in spaced relationship near corresponding ends thereof. More particularly, horizontal coupling arms 16 and 17 on the respective members 12 project rearwardly and forwardly and are pivotally joined by a single vertical axis coupling or pivot pin 18. This allows the two harrow units 10 and 11 to swing in a horizontal plane relative to each other between variable angle soil-working positions, FIG. 1, and spaced parallel transport positions, FIG. 2.
- An arcuate locking sleeve 29 on the link 21 near its longitudinal center can receive an arcuate locking tongue 30 on the link 22 telescopically, FIG. 2, so that the two harrow units 10 and 11 can be rigidly locked in the parallel transport position by dropping a suitable locking pin through one of the openings 31, adapted to register with an opening 32, FIG. 1, of the tongue 30.
- a pair of transport wheels 33 each journaled on a bell crank yoke 34 pivotally attached at 35 to rigid depending bracket arms 36 on the rear frame member 12, as best shown in FIG. 6.
- the extensions 37 of bell crank yokes 34 are pivotally coupled at 38 to piston rods 39 of a pair of hydraulic cylinders 40 which rise from upright supports 41 on rear frame member 12 to which they are rigidly attached.
- the cylinders 40 are swiveled and vertically swingable in relation to their supports 41, as best shown in FIG. 6.
- the two cylinders 40 are operated in unison by conventional controls, not shown, in one hydraulic circuit, separate from another circuit which includes controls for the power cylinder 24 of the described toggle linkage.
- a drawbar 42 for the harrow composed of the two units 10 and 11 is positioned forwardly of and below the forward frame member 12, as shown in the drawings.
- This drawbar has opposite end rearward extensions 43, FIG. 7, pivotally coupled at 44 to the bottoms of rigid vertical arms 45 dependingly secured to a welded projection 46 on the forward face of adjacent frame member 12.
- three coaxial pivot points 44 for the drawbar 42 on the forward frame member 12 and its projection 46 are provided for added sturdiness.
- a draft tongue 47 is coupled as at 48 to a tongue bracket 49 laterally adjustably mounted on the drawbar 42, usually in offset relationship to the center of the front harrow unit 10, as shown. As mounted, the tongue 47 is rigid with respect to the drawbar 42. At its forward end, the tongue carries a pivoted coupling 50 which may swing vertically on a pivot element 51. The coupling 50 is adapted for connection to the hitch pin 52 of a tractor or the like employed to tow the harrow.
- a single inclined power cylinder 53 is provided near the center of the front harrow unit 10 and has its upper cylinder end pivotally attached at 54 to a rocker bracket 55 which in turn is pivoted at 56 to another U-shaped bracket 57 rigid with the member 12 and extending thereabove.
- An adjustable stop element 58 for the rocker bracket 55 is provided near the top of fixed bracket 57 to positively limit the rearward swing of rocker bracket 55 under the influence of power cylinder 53.
- the rod 59 of cylinder 53 is pivotally connected at 60 between a pair of rigid plates 61 which rise from the drawbar 42.
- FIGS. 1 and 3 When the harrow is being used in the soil treating mode, FIGS. 1 and 3, the rods of the two cylinders 40 are retracted to elevate transport wheels 33 to their positions shown in FIG. 3, and the discs 14 of rear harrow unit 11 are on the ground.
- FIG. 1 shows the maximum angle between the forward and rear disc units.
- the rod 25 of cylinder 24 is fully extended as in FIG. 2 to close the toggle links 21 and 22 and render the two units 10 and 11 parallel.
- the machine can be locked for safety in the transport position by placing a locking pin through the engaged elements 29 and 30.
- a pair of rigid stops 62 for the links 21 and 22 in the transport position are preferably provided. The stops 62 are fixed on the forward and rear units 10 and 11 and extend in opposite directions to abut the links 21 and 22 solidly when the frame members 12 are parallel and the rod 25 is extended. The stops 62 thus stabilize the machine during transport.
- the two transport wheel cylinders 40 have their rods extended, as shown in FIG. 4, and the wheels 33 descend and engage the ground and elevate the rear unit 11 including the discs 14 from the ground, as shown.
- the rod 59 of front cylinder 53 is extended and as this occurs rocker bracket 55 swings into contact with the stop 58, FIG. 4.
- the drawbar 42 and connected tongue 47 are depressed below the horizontal and the reaction of the hitch 52 on the tongue causes the raising of the front harrow unit 10, as shown in FIG. 4.
- the frame of the machine defined by members 12 and links 21 and 22 is not quite level.
- final and full extension of the rod 59, as shown in FIG. 5, and the resulting further depression of drawbar 42 and tongue 47 against the hitch of the towing vehicle completes the elevation of the forward unit 10 at which point the members 12 and toggle links 21 and 22 are substantially level, FIG. 5.
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/567,900 USRE33822E (en) | 1980-01-04 | 1984-01-03 | Hinge-type offset wheel harrow |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/109,551 US4308919A (en) | 1980-01-04 | 1980-01-04 | Hinge-type offset wheel harrow |
US06/567,900 USRE33822E (en) | 1980-01-04 | 1984-01-03 | Hinge-type offset wheel harrow |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/109,551 Reissue US4308919A (en) | 1980-01-04 | 1980-01-04 | Hinge-type offset wheel harrow |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE33822E true USRE33822E (en) | 1992-02-18 |
Family
ID=26807074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/567,900 Expired - Lifetime USRE33822E (en) | 1980-01-04 | 1984-01-03 | Hinge-type offset wheel harrow |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE33822E (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114549A (en) * | 1937-04-14 | 1938-04-19 | Donald F Taylor | Disk harrow |
US2728179A (en) * | 1951-09-01 | 1955-12-27 | Deere & Co | Transport device for disk harrows |
FR1387055A (en) * | 1963-09-13 | 1965-01-29 | Huard U C F Sa Des Anciens Eta | Transport device for agricultural tool |
US3271042A (en) * | 1964-01-09 | 1966-09-06 | Flodin Inc | Trailer with lift-type load bed |
US3439750A (en) * | 1965-10-05 | 1969-04-22 | Alexander Mfg Co | Automatic-releasing cable control for harrow |
US3461972A (en) * | 1966-05-18 | 1969-08-19 | Alexander Mfg Co | Carrier for disc harrow |
US3643743A (en) * | 1969-12-29 | 1972-02-22 | Int Harvester Co | Mechanism for opening and closing an offset disk harrow |
US3672701A (en) * | 1970-08-20 | 1972-06-27 | Wilbur L Blank | Trailing wheel structure for vehicle-drawn implement |
US3912018A (en) * | 1973-04-20 | 1975-10-14 | Allis Chalmers | Hydraulic transport, leveling, and hitching mechanism |
US3912017A (en) * | 1973-06-21 | 1975-10-14 | Deere & Co | Automatic leveling mechanism for disk harrows |
-
1984
- 1984-01-03 US US06/567,900 patent/USRE33822E/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114549A (en) * | 1937-04-14 | 1938-04-19 | Donald F Taylor | Disk harrow |
US2728179A (en) * | 1951-09-01 | 1955-12-27 | Deere & Co | Transport device for disk harrows |
FR1387055A (en) * | 1963-09-13 | 1965-01-29 | Huard U C F Sa Des Anciens Eta | Transport device for agricultural tool |
US3271042A (en) * | 1964-01-09 | 1966-09-06 | Flodin Inc | Trailer with lift-type load bed |
US3439750A (en) * | 1965-10-05 | 1969-04-22 | Alexander Mfg Co | Automatic-releasing cable control for harrow |
US3461972A (en) * | 1966-05-18 | 1969-08-19 | Alexander Mfg Co | Carrier for disc harrow |
US3643743A (en) * | 1969-12-29 | 1972-02-22 | Int Harvester Co | Mechanism for opening and closing an offset disk harrow |
US3672701A (en) * | 1970-08-20 | 1972-06-27 | Wilbur L Blank | Trailing wheel structure for vehicle-drawn implement |
US3912018A (en) * | 1973-04-20 | 1975-10-14 | Allis Chalmers | Hydraulic transport, leveling, and hitching mechanism |
US3912017A (en) * | 1973-06-21 | 1975-10-14 | Deere & Co | Automatic leveling mechanism for disk harrows |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ROME INDUSTRIES, INC., 600 FIRST SOURCE BANK CENTE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROME INDUSTRIES, INC.;REEL/FRAME:004920/0344 Effective date: 19880330 |
|
AS | Assignment |
Owner name: ROME INDUSTRIES, INC., A IN CORP., GEORGIA Free format text: TO CORRECT NAME OF ASSIGNOR IN ASSIGNMENT RECORDED JULY 25, 1988, REEL 4923 FRAME 1039;ASSIGNOR:ROME INDUSTRIES, INC., A GA CORP.;REEL/FRAME:005012/0181 Effective date: 19890103 |
|
AS | Assignment |
Owner name: MARKTILL CORPORATION Free format text: MERGER;ASSIGNORS:MARCHESAN CORPORATION (MERGED INTO);ROME INDUSTRIES,INC. (MERGED INTO);REEL/FRAME:006083/0745 Effective date: 19891101 |
|
AS | Assignment |
Owner name: MARKTILL CORPORATION Free format text: MERGER;ASSIGNORS:MARCHESEN CORPORATION;ROME INDUSTRIES, INC. (BOTH MERGED INTO);REEL/FRAME:006113/0171 Effective date: 19891101 |