US3703298A - Device for automatic self-levelling of the body of a threshing-harvesting machine - Google Patents
Device for automatic self-levelling of the body of a threshing-harvesting machine Download PDFInfo
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- US3703298A US3703298A US152144A US3703298DA US3703298A US 3703298 A US3703298 A US 3703298A US 152144 A US152144 A US 152144A US 3703298D A US3703298D A US 3703298DA US 3703298 A US3703298 A US 3703298A
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- pump
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- 238000003306 harvesting Methods 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- STECJAGHUSJQJN-USLFZFAMSA-N LSM-4015 Chemical compound C1([C@@H](CO)C(=O)OC2C[C@@H]3N([C@H](C2)[C@@H]2[C@H]3O2)C)=CC=CC=C1 STECJAGHUSJQJN-USLFZFAMSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- SJDACOMXKWHBOW-UHFFFAOYSA-N oxyphenisatine Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2NC1=O SJDACOMXKWHBOW-UHFFFAOYSA-N 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D75/00—Accessories for harvesters or mowers
- A01D75/28—Control mechanisms for harvesters or mowers when moving on slopes; Devices preventing lateral pull
- A01D75/285—Control mechanisms for harvesters or mowers when moving on slopes; Devices preventing lateral pull with arrangements for holding the harvesting or mowing apparatus in a horizontal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2200/00—Indexing codes relating to suspension types
- B60G2200/30—Rigid axle suspensions
- B60G2200/32—Rigid axle suspensions pivoted
- B60G2200/322—Rigid axle suspensions pivoted with a single pivot point and a straight axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/08—Agricultural vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/90—System Controller type
- B60G2800/91—Suspension Control
- B60G2800/912—Attitude Control; levelling control
Definitions
- This invention relates to a device for effecting automatic levelling threshing-harvesting machines.
- the body of such machines is hinged in its center for rocking movement about axles which are formed by double levers interconnected in deformable parallelogram linkages, the body being kept upright by hydraulic double-acting rams.
- the cutting platform of the machine is kept substantially parallel to the ground by means of other devices which form a connection between the platform itself and the front axle of the machine.
- An object of this invention is to provide a device for the automatic levelling of the body of such machines, which is of simple, strong and economical construction, precise and safe in operation and of high functional efficiency.
- Another object of this invention is to provide a device of the above mentioned type, which allows automatic levelling at different rates as a function of the inclination taken of the body to the horizontal and which allows at the same time manual emergency operation for quick straightening.
- a further object of this invention is to provide a device as aforesaid which has high sensitivity and precision of control and is able to cease operation immediately in the event of an excessive inclination of the body to the horizontal, initiating an alarm signal.
- the present invention accordingly provides a device for effecting automatic levelling of the body of a threshing-harvesting machine, characterized in that the device comprises two inter-communicating liquid-containing vessels, mounted on opposite lateral sides of the body, first and second magnetic level-sensitive switches placed at different lateral positions or heights in each vessel and adapted to operate selectively in response to lateral inclinations of the body of the machine to the horizontal by more than a first and more than a second angle respectively, the second angle being greater than the first, the first switches being arranged to operate a double acting first electro-valve in a feed circuit for two hydraulic levelling actuators and the second switches being arranged to operate a second electro-valve,
- FIG. 1 is a schematic front view of a threshing-harvesting machine provided with an automatic body levelling device according to one embodiment of the invention
- FIG. 2 is an hydraulic circuit diagram of the device
- FIG. 3 is an electric circuit diagram of the device.
- reference numeral 1 indicates the body of a threshing-harvesting machine (drawn without its cutting platform).
- the body 1 has a central front appendage la which is pivotally connected to a front axle 3 by means of a center pivot 2 for rocking movement about a central longitudinal axis.
- the body 1 is formed with two lateral brackets 4, 4 which provide pivotal support for the cylinders 5, 5 of the respective hydraulic double-acting rams, the piston rods 6, 6' of which are pivotally connected by means of respective joints 7, 7' to opposite ends of the axle 3.
- the ram cylinders 5, 5' are supplied from an hydraulic pump 8, which draws hydraulic fluid from a tank 9 and supplies the fluid under pressure, through an adjustable spring-loaded pressure relief valve 10, to a conduit 11 which subdivides into two branch conduits 12 and 13.
- the branch conduit 12 supplies the fluid under pressure to a double-acting first solenoid-operated electrovalve 14.
- the valve 14 has a first pair of output conduits 15, 15' connected to opposite ends of the respective cylinders 5, 5' and a second pair of output conduits 16, 16 connected to the other ends of said cylinders, so that the conduits 15 and 16' are connected to the lower ends of the cylinders 5 and 5 and the conduits 15' and 16 are connected to the upper ends of the cylinders 5' and 5 respectively.
- the branch conduit 13 is connected through an adjustable flow restrictor 17 to a single-acting second solenoid-operated electro-valve' 19 which, in its rest condition, connects the output of the restrictor 17 to the tank 9 to ensure that substantially half the output flow from the pump 8 reaches the first electro-valve 14.
- FIG. 3 illustrates the electric circuit of the device.
- Two inter-communicating vessels 19, 19' are fixed laterally to the body 1 of the machine and communicate through aconduit 19a containing a throttling valve 19b.
- Each vessel 19 and 19 contains two magnetically operated float switches 20, 21 and 20', 21' respectively co-operating with respective magnetic relays 22, 23 and 22', 23.
- the two switches 20, 21 and 20, 21' in each vessel 19 and 19 are spaced apart laterally so that the two outermost switches 20 and 20 are more sensitive to lateral inclination of the body 1 than the two innermost switches 21 and 21'.
- the two switches 20, 21 and 20', 21 may be arranged at different heights in each vessel.
- a micro-switch 31 is operable manually by means of an emergency lever 32, pivoted at 33 and adapted to act mechanically on the double-acting first electrovalve 14.
- Two limit micro-switches 34, 34' are arranged to be operated directly by the axle 3 when the lateral inclination of the body 1 exceeds the maximum inclination at which the automatic control device is allowed to operate.
- the fluid transfer rate from one vessel to the other is controlled by the throttling valve 21 so that the damping action of the liquid allows the body of the machine to reach an exactly upright position and not a position inclined to the horizontal.
- the axle 3 When the inclination of the machine body to the horizontal has reached the maximum limit of safety, the axle 3 operates one of the limit switches 34 and 34, so that the relay 27 is energized, causing operation of the interruptor 28 and therefore of the optical and acoustic alarm device 30 and the flasher lamp 29. As the same time the current is cut off from the relays 22, 23, 22', 23 of the float switches and so the two electro-valves 14 and 18 remain in their rest positions and the hydraulic circuit is inoperative. Automatic levelling control therefore ceases.
- the first electro-valve 14 can also be controlled manually by means of the emergency lever 32, which acts mechanically on the moving part of the valve 14 and which also operates the micro-switch 31 so as to interrupt the current which would normally be supplied to the relays 22, and 22 by the inner float switches 20 and 20' supplying this current directly to the electrovalve 18, which causes the entire output flow from the pump 8 to reach the first electrovalve 14, allowing rapid levelling of the body 1 of the machine, as previously described, as if one of the inner float switches 23,
- Device for effecting automatic levelling of the body of a threshing-harvesting machine comprising in combination:
- conduit means intercommunicating said vessels
- first and second magnetic level-sensitive switches in each respective vessel, said two switches being located at different lateral positions in each vessel and being operable selectively in response to lateral inclinations of said body of the machine to the horizontal by more than a first and a second angle respectively, the second angle being greater than the first;
- an hydraulic circuit including two hydraulic levelling actuators, said first electro-valve being included in said circuit and controlling supply of hydraulic fluid thereto;
- a second electro-valve operable by the second switches, said second electro-valve normally reducing the flow of hydraulic fluid under pressure from said pump to the actuators, the latter being supplied with the full pump flow to effect rapid levelling when 7 said second electro-valve is operated by said second switches,
- said manual control means for operating the two electro-valves comprise a lever arranged to act mechanically on the movable part of the first electro-valve and including an electric switch operable simultaneously by said lever to operate said second electro-valve so that the entire output flow of said pump is supplied to said levelling actuators for rapid levelling.
- said means to prevent said two electro-valves from operating and for activating said alarm device are formed by two limit switches arranged to be operated mechanically by an axle of the machine when the body of the machine exceeds a maximum predetermined inclination to the horizontal, a relay connected to said limit switches, an interruptor connected to said relay and operable upon energization thereof, and an optical and acoustic alarm device connected to the interruptor for operation thereby in response to operation of either limit switch, said limit switches upon operation also breaking the electric circuits of said two electro-valves.
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Level Indicators Using A Float (AREA)
- Threshing Machine Elements (AREA)
Abstract
Automatic self-levelling of the body of a threshing-harvesting machine is effected by a device which is sensitive to the operation of respective magnetic float switches located in respective interconnected liquid-containing vessels positioned on opposite lateral sides of the body. Each vessel contains two laterally spaced apart float switches connected to electro-valves in an hydraulic circuit for self-levelling actuators so that when either of the laterally outer float switches is operated the actuators are supplied with part of the hydraulic fluid output from a pump to effect correction and when either of the inner switches is operated at a greater angle of inclination, the actuators are supplied with the full pump output to effect rapid levelling. An alarm is operated automatically in the event of excessive inclination of the body of the machine.
Description
United States Patent Laverda DEVICE FOR AUTOMATIC SELF- LEVELLING OF THE BODY OF A THRESHING-HARVESTING MACHINE Inventor: Pietro Laverda, Breganze, Italy Pietro Laverda S.p.A., Breganze, Italy Filed: June 11, 1971 Appl. No.: 152,144
Assignee:
Int. Cl ..B60g 17/04 Field of Search ..280/6, 6 H, 6.1, 6.11, 124 F References Cited UNITED STATES PATENTS 2/1966 Boone ..-....280/6 H 8/1966 Allinquant ..280/6 H [451 Nov. 21, 1972 3,181,878 5/1965 Vogel ..280/6.l
Primary ExaminerPhilip Goodman Attorney-Sughrue, Rothwell, Mion, Zinn & Macpeak ABSTRACT Automatic self-levelling of the body of a threshingharvesting machine is effected by a device which is sensitive to the operation of respective magnetic float switches located in respective interconnected liquidcontaining vessels positioned on opposite lateral sides of the body. Each vessel contains two laterally spaced apart float switches connected to electro-valves in an hydraulic circuit for self-levelling actuators so that when either of the laterally outer float switches is operated the actuators are supplied with part of the hydraulic fluid output from a pump to effect correction and when either of the inner switches is operated at a greater angle of inclination, the actuators are supplied with the full pump output to effect rapid levelling. An alarm is operated automatically in the event of excessive inclination of the body of the machine.
3 Claims, 3 Drawing Figures PATENTED I97? 3. 703, 298
sum 1 or 3 INVENTOR P/E m0 LAvEmA 53 k, n, BY 2' wc hk ATTORNEYS PATENTEWZL I912 SHEET 3 0F 3 3.703.298
mm mm DEVICE FOR AUTOMATIC SELF-LEVELLING OF THE BODY OF A THRESHING-IIARVESTING MACHINE BACKGROUND OF THE INVENTION This invention relates to a device for effecting automatic levelling threshing-harvesting machines.
It is known to provide such machines with devices which maintain the body of the threshing machine upright independently of unevenness of the ground on which the wheels of the machine rest.
The body of such machines is hinged in its center for rocking movement about axles which are formed by double levers interconnected in deformable parallelogram linkages, the body being kept upright by hydraulic double-acting rams.
The cutting platform of the machine is kept substantially parallel to the ground by means of other devices which form a connection between the platform itself and the front axle of the machine.
An object of this invention is to provide a device for the automatic levelling of the body of such machines, which is of simple, strong and economical construction, precise and safe in operation and of high functional efficiency.
Another object of this invention is to provide a device of the above mentioned type, which allows automatic levelling at different rates as a function of the inclination taken of the body to the horizontal and which allows at the same time manual emergency operation for quick straightening.
A further object of this invention is to provide a device as aforesaid which has high sensitivity and precision of control and is able to cease operation immediately in the event of an excessive inclination of the body to the horizontal, initiating an alarm signal.
SUMMARY OF THE INVENTION The present invention accordingly provides a device for effecting automatic levelling of the body of a threshing-harvesting machine, characterized in that the device comprises two inter-communicating liquid-containing vessels, mounted on opposite lateral sides of the body, first and second magnetic level-sensitive switches placed at different lateral positions or heights in each vessel and adapted to operate selectively in response to lateral inclinations of the body of the machine to the horizontal by more than a first and more than a second angle respectively, the second angle being greater than the first, the first switches being arranged to operate a double acting first electro-valve in a feed circuit for two hydraulic levelling actuators and the second switches being arranged to operate a second electro-valve,
which normally reduces the flow of hydraulic fluid under pressure from a pump to the actuators so that the latter are supplied with the full pump flow to eflect rapid levelling, means for operating the two electro-- valves manually and means operative to prevent the two electro-valves from operating in the event of an excessive inclination of the said body, and to activate an alarm device.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described, by way of nonlimiting example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic front view of a threshing-harvesting machine provided with an automatic body levelling device according to one embodiment of the invention;
FIG. 2 is an hydraulic circuit diagram of the device, and
FIG. 3 is an electric circuit diagram of the device.
DETAILED DESCRIPTION OF THE DRAWINGS With referenceto FIG. '1, reference numeral 1 indicates the body of a threshing-harvesting machine (drawn without its cutting platform). The body 1 has a central front appendage la which is pivotally connected to a front axle 3 by means of a center pivot 2 for rocking movement about a central longitudinal axis.
The body 1 is formed with two lateral brackets 4, 4 which provide pivotal support for the cylinders 5, 5 of the respective hydraulic double-acting rams, the piston rods 6, 6' of which are pivotally connected by means of respective joints 7, 7' to opposite ends of the axle 3.
As illustrated in FIG. 2, the ram cylinders 5, 5' are supplied from an hydraulic pump 8, which draws hydraulic fluid from a tank 9 and supplies the fluid under pressure, through an adjustable spring-loaded pressure relief valve 10, to a conduit 11 which subdivides into two branch conduits 12 and 13. The branch conduit 12 supplies the fluid under pressure to a double-acting first solenoid-operated electrovalve 14. The valve 14 has a first pair of output conduits 15, 15' connected to opposite ends of the respective cylinders 5, 5' and a second pair of output conduits 16, 16 connected to the other ends of said cylinders, so that the conduits 15 and 16' are connected to the lower ends of the cylinders 5 and 5 and the conduits 15' and 16 are connected to the upper ends of the cylinders 5' and 5 respectively.
The branch conduit 13 is connected through an adjustable flow restrictor 17 to a single-acting second solenoid-operated electro-valve' 19 which, in its rest condition, connects the output of the restrictor 17 to the tank 9 to ensure that substantially half the output flow from the pump 8 reaches the first electro-valve 14.
FIG. 3 illustrates the electric circuit of the device. Two inter-communicating vessels 19, 19' are fixed laterally to the body 1 of the machine and communicate through aconduit 19a containing a throttling valve 19b. Each vessel 19 and 19 contains two magnetically operated float switches 20, 21 and 20', 21' respectively co-operating with respective magnetic relays 22, 23 and 22', 23. The two switches 20, 21 and 20, 21' in each vessel 19 and 19 are spaced apart laterally so that the two outermost switches 20 and 20 are more sensitive to lateral inclination of the body 1 than the two innermost switches 21 and 21'. Alternatively, the two switches 20, 21 and 20', 21 may be arranged at different heights in each vessel.
Current is supplied through a lead 24, a fuse 24a and a master switch 25 to a pilot lamp 26, a relay 27 and an interruptor 28 connected in its turn with a flasher lamp 29 and an optical and acoustic alarm device 30.
A micro-switch 31 is operable manually by means of an emergency lever 32, pivoted at 33 and adapted to act mechanically on the double-acting first electrovalve 14. Two limit micro-switches 34, 34' are arranged to be operated directly by the axle 3 when the lateral inclination of the body 1 exceeds the maximum inclination at which the automatic control device is allowed to operate.
The operation of the device is as follows:
When the body 1 of the machine reaches a lateral inclination to the horizontal between 4 and l the lower of the two laterally outer float switches 20 and 20' is operated by the buoyancy effect ofthe liquid in the vessel 19 or 19 to close the circuit in which it is connected and operate the first electro-valve 14 so as to cause the latter to direct the hydraulic fluid into opposite ends of the two cylinders S and 5 in a sense such as to counter the inclination of the body 1 of the machine and thereby bring about levelling of the latter. The flow of fluid into the two ram cylinders 5, 5' is substantially half the output flow of the pump 8, and therefore the levelling speed is slow.
When the body 1 of the machine has reached an upright position, the float switch which has been operated reopens the circuit and-the levelling action of the device stops.
The fluid transfer rate from one vessel to the other is controlled by the throttling valve 21 so that the damping action of the liquid allows the body of the machine to reach an exactly upright position and not a position inclined to the horizontal.
When the body 1 of the machine assumes an inclination to the horizontal greater than both magnetic float switches and 21 or 20' and 21' which are in the lower vessel 19 or 19' close, energizing simultaneously both the electro-valves l4 and 18. The electro-valve l8 closes the return fluid path through the flow-restrictor 17 to the tank 9 and therefore the entire output of the pump 8 will pass through the electro-valve 14 and will be supplied to the cylinders 5 and 5'. The latter then cause rapid levelling of the body of the machine. When the inclination of the body 1 is again smaller than 10, the laterally inner float switch (23, or 23') is reopened and the second electro-valve 18 therefore again opens, reducing the rate of levelling.
When the inclination of the machine body to the horizontal has reached the maximum limit of safety, the axle 3 operates one of the limit switches 34 and 34, so that the relay 27 is energized, causing operation of the interruptor 28 and therefore of the optical and acoustic alarm device 30 and the flasher lamp 29. As the same time the current is cut off from the relays 22, 23, 22', 23 of the float switches and so the two electro- valves 14 and 18 remain in their rest positions and the hydraulic circuit is inoperative. Automatic levelling control therefore ceases.
The first electro-valve 14 can also be controlled manually by means of the emergency lever 32, which acts mechanically on the moving part of the valve 14 and which also operates the micro-switch 31 so as to interrupt the current which would normally be supplied to the relays 22, and 22 by the inner float switches 20 and 20' supplying this current directly to the electrovalve 18, which causes the entire output flow from the pump 8 to reach the first electrovalve 14, allowing rapid levelling of the body 1 of the machine, as previously described, as if one of the inner float switches 23,
24' has been operated. It will be appreciated that details of practical embodiments of this invention may depart widely from the illustrated embodiment without departing from the scop of this invention.
I c arm:
1. Device for effecting automatic levelling of the body of a threshing-harvesting machine, comprising in combination:
a. two liquid-containing vessels mounted on opposite lateral sides of the body;
b. conduit means intercommunicating said vessels;
c. first and second magnetic level-sensitive switches in each respective vessel, said two switches being located at different lateral positions in each vessel and being operable selectively in response to lateral inclinations of said body of the machine to the horizontal by more than a first and a second angle respectively, the second angle being greater than the first;
. a double acting first electro-valve operable by the first switches;
. an hydraulic circuit including two hydraulic levelling actuators, said first electro-valve being included in said circuit and controlling supply of hydraulic fluid thereto;
f. a pump in said hydraulic circuit;
g. a second electro-valve operable by the second switches, said second electro-valve normally reducing the flow of hydraulic fluid under pressure from said pump to the actuators, the latter being supplied with the full pump flow to effect rapid levelling when 7 said second electro-valve is operated by said second switches,
h. means operating said two electro-valves manually;
i. means sensitive to excessive inclination of said body to the horizontal to prevent said two electrovalves from operating, and,
j. an alarm device operable by said means sensitive to excessive inclination.
2. Device according to claim 1, wherein said manual control means for operating the two electro-valves comprise a lever arranged to act mechanically on the movable part of the first electro-valve and including an electric switch operable simultaneously by said lever to operate said second electro-valve so that the entire output flow of said pump is supplied to said levelling actuators for rapid levelling.
3. Device according to claim 1, wherein said means to prevent said two electro-valves from operating and for activating said alarm device are formed by two limit switches arranged to be operated mechanically by an axle of the machine when the body of the machine exceeds a maximum predetermined inclination to the horizontal, a relay connected to said limit switches, an interruptor connected to said relay and operable upon energization thereof, and an optical and acoustic alarm device connected to the interruptor for operation thereby in response to operation of either limit switch, said limit switches upon operation also breaking the electric circuits of said two electro-valves.
Claims (3)
1. Device for effecting automatic levelling of the body of a threshing-harvesting machine, comprising in combination: a. two liquid-containing vessels mounted on opposite lateral sides of the body; b. conduit means intercommunicating said vessels; c. first and second magnetic level-sensitive switches in each respective vessel, said two switches being located at different lateral positions in each vessel and being operable selectively in response to lateral inclinations of said body of the machine to the horizontal by more than a first and a second angle respectively, the second angle being greater than the first; d. a double acting fIrst electro-valve operable by the first switches; e. an hydraulic circuit including two hydraulic levelling actuators, said first electro-valve being included in said circuit and controlling supply of hydraulic fluid thereto; f. a pump in said hydraulic circuit; g. a second electro-valve operable by the second switches, said second electro-valve normally reducing the flow of hydraulic fluid under pressure from said pump to the actuators, the latter being supplied with the full pump flow to effect rapid levelling when said second electro-valve is operated by said second switches; h. means operating said two electro-valves manually; i. means sensitive to excessive inclination of said body to the horizontal to prevent said two electro-valves from operating, and, j. an alarm device operable by said means sensitive to excessive inclination.
1. Device for effecting automatic levelling of the body of a threshing-harvesting machine, comprising in combination: a. two liquid-containing vessels mounted on opposite lateral sides of the body; b. conduit means intercommunicating said vessels; c. first and second magnetic level-sensitive switches in each respective vessel, said two switches being located at different lateral positions in each vessel and being operable selectively in response to lateral inclinations of said body of the machine to the horizontal by more than a first and a second angle respectively, the second angle being greater than the first; d. a double acting fIrst electro-valve operable by the first switches; e. an hydraulic circuit including two hydraulic levelling actuators, said first electro-valve being included in said circuit and controlling supply of hydraulic fluid thereto; f. a pump in said hydraulic circuit; g. a second electro-valve operable by the second switches, said second electro-valve normally reducing the flow of hydraulic fluid under pressure from said pump to the actuators, the latter being supplied with the full pump flow to effect rapid levelling when said second electro-valve is operated by said second switches; h. means operating said two electro-valves manually; i. means sensitive to excessive inclination of said body to the horizontal to prevent said two electro-valves from operating, and, j. an alarm device operable by said means sensitive to excessive inclination.
2. Device according to claim 1, wherein said manual control means for operating the two electro-valves comprise a lever arranged to act mechanically on the movable part of the first electro-valve and including an electric switch operable simultaneously by said lever to operate said second electro-valve so that the entire output flow of said pump is supplied to said levelling actuators for rapid levelling.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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IT6932370 | 1970-07-06 |
Publications (1)
Publication Number | Publication Date |
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US3703298A true US3703298A (en) | 1972-11-21 |
Family
ID=11311866
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Application Number | Title | Priority Date | Filing Date |
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US152144A Expired - Lifetime US3703298A (en) | 1970-07-06 | 1971-06-11 | Device for automatic self-levelling of the body of a threshing-harvesting machine |
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Country | Link |
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US (1) | US3703298A (en) |
ES (1) | ES392387A1 (en) |
FR (1) | FR2098106A5 (en) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3861696A (en) * | 1972-06-01 | 1975-01-21 | Bofors Ab | Device for damping rocking movements occurring in a chassis |
US3881743A (en) * | 1974-05-02 | 1975-05-06 | Gen Motors Corp | Automotive leveling system |
US4050704A (en) * | 1975-09-08 | 1977-09-27 | Institutul De Cercetari Si Proiectari De Masini Agricole-Icpma | Device for maintaining an upright position of the body of a harvester-thresher machines |
US4315631A (en) * | 1979-03-08 | 1982-02-16 | Edmond Rainville | Trailers for elongated loads |
US4679803A (en) * | 1986-01-27 | 1987-07-14 | The United States Of America As Represented By The Secretary Of Agriculture | Apparatus for maintaining stability of mobile land vehicles on sloping terrain |
US4679489A (en) * | 1985-11-04 | 1987-07-14 | Becor Western Inc. | Automatic leveling system for blast hole drills and the like |
US4750751A (en) * | 1986-11-26 | 1988-06-14 | Deere & Company | Pivoting axle for a hillside combine |
US5178402A (en) * | 1991-08-07 | 1993-01-12 | Deere & Company | Leveling assembly for a vehicle |
DE4131433A1 (en) * | 1991-09-21 | 1993-04-01 | Deere & Co | Swivel mechanism for frame supported gearbox - has gearbox flanged to frame instead of to bracket and input shaft, parallel to output shaft. |
DE4209340A1 (en) * | 1992-03-23 | 1993-09-30 | Deere & Co | Pivot mechanism for driven vehicle-wheel |
EP0698338A1 (en) | 1991-09-21 | 1996-02-28 | Deere & Company | Harvesting machine with compensation means for hillside working |
US5997013A (en) * | 1997-07-23 | 1999-12-07 | Upright, Inc. | Chassis stabilization system |
EP0994009A1 (en) * | 1998-10-16 | 2000-04-19 | Same Deutz-Fahr S.P.A. | An agricultural machine with a self-leveling cab |
US6279931B1 (en) * | 1995-08-30 | 2001-08-28 | John F. Kopczynski | Vehicle with vertically movable and vertically pulsating wheels |
US6331010B1 (en) * | 1997-07-23 | 2001-12-18 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Structure for supporting cylinders |
US6382637B1 (en) * | 2000-08-12 | 2002-05-07 | Firma Carl Freudenberg | Device for controlling the flow rate of hydraulic fluid in a supply line for vehicles |
US6467776B1 (en) * | 1999-08-18 | 2002-10-22 | Bobcat France S.A. | Device for tilt correction of a two axles platform |
EP1522215A1 (en) * | 2003-10-08 | 2005-04-13 | Angel Carlos Irujo Lopez | Levelling-compensating system for harvesters and the like |
USRE39477E1 (en) * | 1992-12-04 | 2007-01-23 | Jlg Omniquip, Inc. | Forklift stabilizing apparatus |
US20070262549A1 (en) * | 2006-05-12 | 2007-11-15 | Haerr Timothy A | Vehicle hydraulic system |
US20090118913A1 (en) * | 2006-05-26 | 2009-05-07 | O'halloran James | Vector Controlled Leveling System for a Forestry Machine |
US20090115148A1 (en) * | 2007-11-07 | 2009-05-07 | In Woo Kim | Leveling apparatus for excavator and forestry machine equipment |
US20100204886A1 (en) * | 2009-02-12 | 2010-08-12 | Lockheed Martin Corporation | Method and system for increasing a vehicle side slope operating capabilities |
US20110018219A1 (en) * | 2009-07-27 | 2011-01-27 | International Truck Intellectual Property Company, Llc | Hydraulic, rigid rear axle suspension system for vehicles |
US20150151952A1 (en) * | 2012-05-31 | 2015-06-04 | Ponsse Oyj | Stabilizing of forest work unit |
EP3348132A1 (en) * | 2017-01-12 | 2018-07-18 | CNH Industrial Belgium NV | Lateral tilt control system for an agricultural harvester |
CN112781560A (en) * | 2021-01-26 | 2021-05-11 | 太原理工大学 | Automatic and manual combined leveling device and method |
US11259463B1 (en) * | 2018-10-04 | 2022-03-01 | Harper Industries, Inc. | Slope mower with automatic leveling suspension and system for maintaining vertical orientation of mower body |
US11470773B2 (en) | 2017-08-02 | 2022-10-18 | Briggs & Stratton, Llc | Stand-on mower with an oscillating front axle |
US20220402323A1 (en) * | 2021-06-22 | 2022-12-22 | Blackseries Intelligent Equipment (Weihai) Co., Ltd | Self-balancing device for self-propelled off-road rv box body |
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US3181878A (en) * | 1959-12-15 | 1965-05-04 | Dawson Vogel Engineering Compa | Electromagnetic control system for fluid actuated suspension system |
US3233909A (en) * | 1964-04-24 | 1966-02-08 | Allis Chalmers Mfg Co | Leveling system for hillside combines |
US3264008A (en) * | 1962-12-05 | 1966-08-02 | Allinquant Fernand Stanislas | Vehicles having electrically controlled automatic level-correcting suspension |
-
1971
- 1971-06-11 US US152144A patent/US3703298A/en not_active Expired - Lifetime
- 1971-06-18 ES ES392387A patent/ES392387A1/en not_active Expired
- 1971-06-23 FR FR7123827A patent/FR2098106A5/fr not_active Expired
Patent Citations (3)
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US3181878A (en) * | 1959-12-15 | 1965-05-04 | Dawson Vogel Engineering Compa | Electromagnetic control system for fluid actuated suspension system |
US3264008A (en) * | 1962-12-05 | 1966-08-02 | Allinquant Fernand Stanislas | Vehicles having electrically controlled automatic level-correcting suspension |
US3233909A (en) * | 1964-04-24 | 1966-02-08 | Allis Chalmers Mfg Co | Leveling system for hillside combines |
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3861696A (en) * | 1972-06-01 | 1975-01-21 | Bofors Ab | Device for damping rocking movements occurring in a chassis |
US3881743A (en) * | 1974-05-02 | 1975-05-06 | Gen Motors Corp | Automotive leveling system |
US4050704A (en) * | 1975-09-08 | 1977-09-27 | Institutul De Cercetari Si Proiectari De Masini Agricole-Icpma | Device for maintaining an upright position of the body of a harvester-thresher machines |
US4315631A (en) * | 1979-03-08 | 1982-02-16 | Edmond Rainville | Trailers for elongated loads |
US4679489A (en) * | 1985-11-04 | 1987-07-14 | Becor Western Inc. | Automatic leveling system for blast hole drills and the like |
US4679803A (en) * | 1986-01-27 | 1987-07-14 | The United States Of America As Represented By The Secretary Of Agriculture | Apparatus for maintaining stability of mobile land vehicles on sloping terrain |
US4750751A (en) * | 1986-11-26 | 1988-06-14 | Deere & Company | Pivoting axle for a hillside combine |
EP0531688A3 (en) * | 1991-08-07 | 1994-02-16 | Deere & Co | |
US5178402A (en) * | 1991-08-07 | 1993-01-12 | Deere & Company | Leveling assembly for a vehicle |
DE4131433A1 (en) * | 1991-09-21 | 1993-04-01 | Deere & Co | Swivel mechanism for frame supported gearbox - has gearbox flanged to frame instead of to bracket and input shaft, parallel to output shaft. |
EP0698338A1 (en) | 1991-09-21 | 1996-02-28 | Deere & Company | Harvesting machine with compensation means for hillside working |
DE4209340A1 (en) * | 1992-03-23 | 1993-09-30 | Deere & Co | Pivot mechanism for driven vehicle-wheel |
USRE39477E1 (en) * | 1992-12-04 | 2007-01-23 | Jlg Omniquip, Inc. | Forklift stabilizing apparatus |
US6279931B1 (en) * | 1995-08-30 | 2001-08-28 | John F. Kopczynski | Vehicle with vertically movable and vertically pulsating wheels |
US5997013A (en) * | 1997-07-23 | 1999-12-07 | Upright, Inc. | Chassis stabilization system |
US6331010B1 (en) * | 1997-07-23 | 2001-12-18 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Structure for supporting cylinders |
EP0994009A1 (en) * | 1998-10-16 | 2000-04-19 | Same Deutz-Fahr S.P.A. | An agricultural machine with a self-leveling cab |
US6273203B1 (en) | 1998-10-16 | 2001-08-14 | Same Deutz-Fahr Spa | Agricultural machine with a self-leveling cab |
US6467776B1 (en) * | 1999-08-18 | 2002-10-22 | Bobcat France S.A. | Device for tilt correction of a two axles platform |
US6382637B1 (en) * | 2000-08-12 | 2002-05-07 | Firma Carl Freudenberg | Device for controlling the flow rate of hydraulic fluid in a supply line for vehicles |
ES2257130A1 (en) * | 2003-10-08 | 2006-07-16 | Angel Carlos Irujo Lopez | Levelling-compensating system for harvesters and the like |
EP1522215A1 (en) * | 2003-10-08 | 2005-04-13 | Angel Carlos Irujo Lopez | Levelling-compensating system for harvesters and the like |
US20070262549A1 (en) * | 2006-05-12 | 2007-11-15 | Haerr Timothy A | Vehicle hydraulic system |
US7665742B2 (en) * | 2006-05-12 | 2010-02-23 | Haerr Timothy A | Vehicle hydraulic system |
US20090118913A1 (en) * | 2006-05-26 | 2009-05-07 | O'halloran James | Vector Controlled Leveling System for a Forestry Machine |
US8180532B2 (en) * | 2006-05-26 | 2012-05-15 | Deere & Company | Vector controlled leveling system for a forestry machine |
US20090115148A1 (en) * | 2007-11-07 | 2009-05-07 | In Woo Kim | Leveling apparatus for excavator and forestry machine equipment |
US7832740B2 (en) * | 2007-11-07 | 2010-11-16 | Volvo Construction Equipment Holding Sweden Ab | Leveling apparatus for excavator and forestry machine equipment |
US20100204886A1 (en) * | 2009-02-12 | 2010-08-12 | Lockheed Martin Corporation | Method and system for increasing a vehicle side slope operating capabilities |
US20110018219A1 (en) * | 2009-07-27 | 2011-01-27 | International Truck Intellectual Property Company, Llc | Hydraulic, rigid rear axle suspension system for vehicles |
US9550656B2 (en) * | 2012-05-31 | 2017-01-24 | Ponsse Oyj | Stabilizing of forest work unit |
US20150151952A1 (en) * | 2012-05-31 | 2015-06-04 | Ponsse Oyj | Stabilizing of forest work unit |
EP3348132A1 (en) * | 2017-01-12 | 2018-07-18 | CNH Industrial Belgium NV | Lateral tilt control system for an agricultural harvester |
US10159182B2 (en) | 2017-01-12 | 2018-12-25 | Cnh Industrial America Llc | Lateral tilt control system for an agricultural harvester |
US11019769B2 (en) | 2017-01-12 | 2021-06-01 | Cnh Industrial America Llc | Lateral tilt control for an agricultural harvester |
US11470773B2 (en) | 2017-08-02 | 2022-10-18 | Briggs & Stratton, Llc | Stand-on mower with an oscillating front axle |
US11259463B1 (en) * | 2018-10-04 | 2022-03-01 | Harper Industries, Inc. | Slope mower with automatic leveling suspension and system for maintaining vertical orientation of mower body |
CN112781560A (en) * | 2021-01-26 | 2021-05-11 | 太原理工大学 | Automatic and manual combined leveling device and method |
CN112781560B (en) * | 2021-01-26 | 2022-09-16 | 太原理工大学 | Automatic and manual combined leveling device and method |
US20220402323A1 (en) * | 2021-06-22 | 2022-12-22 | Blackseries Intelligent Equipment (Weihai) Co., Ltd | Self-balancing device for self-propelled off-road rv box body |
US11718140B2 (en) * | 2021-06-22 | 2023-08-08 | Blackseries Intelligent Equipment (Weihai) Co., Ltd | Self-balancing device for self-propelled off-road RV box body |
Also Published As
Publication number | Publication date |
---|---|
FR2098106A5 (en) | 1972-03-03 |
ES392387A1 (en) | 1973-08-01 |
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