US3302729A

US3302729A - Mechanical attachment or device replacing connecting rods between lift arms on tractor and pull tugs

Info

Publication number: US3302729A
Application number: US422330A
Authority: US
Inventors: Asa O Pitzer
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-12-30
Filing date: 1964-12-30
Publication date: 1967-02-07
Anticipated expiration: 1984-02-07

Description

Feb 7, 1967 0. PITZER 3,3@,7Z

MECHANICAL ATTACHMENT OR DEVICE REPLACING CONNECTING RODS BETWEEN LIFT ARMS ON TRACTOR AND FULL TUGS Filed Dec. 50, 1964 5 Sheets-Sheet 1 ll 1 (I if!wwwnmmnmumwfg 0 IN VEN TOR.

Feb. 7, 1967 A. o. PITZER 393929729 MECHANICAL ATTACHMENT OR DEVICE REPLACING CONNECTING RODS BETWEEN LIFT ARMS ON TRACTOR AND PULL TUGS Filed Dec. 30, 1964 5 Sheets-Sheet 2 INVENTOR. ,454 0 9725? Ffib. 7, 1967 A- n- BBQZJZ MECHANICAL ATTACHMENT OR DEVICE REPLACING CONNECTING RODS BETWEEN LIFT ARMS ON TRACTOR AND FULL TUGS Filed Dec. 30, 1964 3 Sheets-Sheet 5 IN VEN TOR.

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United States Patent l 3,302,729 MECHANICAL ATTACHMENT OR DEVICE RE- PLACING CONNECTING RGDS BETWEEN LIFT ARMS 0N TRACTOR AND FULL TUGS Asa 0. Pitzer, Felt, Okla. 73937 Filed Dec. 30, 1964, Ser. No. 422,330 3 Claims. (Cl. 172414) The present invention relates to an improved attachment for replacing connecting rods between lift arms of a tractor, and more particularly the invention relates to an attachment useful in the control of gage wheels or depth control means for any tool useful on a tractcr that penetrates the soil without using other means, such as hydraulic or energycontrolled devices.

The preferred form of the invention is an attachment by which one uses only the levers that raise and lower the tools and no other means, such as a hydraulic system including its cylinder, is necessary. When the attachment of the invention is installed and the control lever is actuated for positioning the tool in the up position, the lift arms raise outside of a square tube or sliding tube to position a stop pin. A hydraulic lift arm, as well as other lever arms, are reactivated and connected to gage wheels, and activates them without raising the tool. After the stop pin is within the square tube, it will pull the tool all the way out of the ground as desired.

Thus it is seen that the present invention provides a mechanical attachment or device for replacing connecting rods between lift arms on tractors and pull tugs.

The above and other objects and advantages of the invention will become apparent upon full consideration of the following detailed description and accompanying drawings in which:

FIGURE 1 is a broken away, side elevational view showing in part a tractor with the mechanical attachment according to the preferred embodiment of the present invention;

FIGURE 2 shows a broken away view of the essential components in a plan view of the mechanical attachment of the present invention;

FIGURE 3 hows a broken away perspective view of the sliding slot and stop pin of the invention;

FIGURES 4 and 4a show detailed views of the pull springs and their attending coupling mechanisms; and

FIGURE 5 shows a perspective view of the attachment mechanism including the sliding slot and the pull springs in a given construction according to the preferred embodiment of the invention.

The attachment of the invention is for the control of the gage wheels, or for the control of the depth that any tool that may be used in farming and earth moving for penetrating or impacting against the soil without using any other hydraulic means, except the hydraulic means that are built in and are supplied with the tractor in a conventional way, as the tractors are built and sold commercially at the present time. With the attachment of the invention, one need only use the levers that raise and lower the tools without any other cylinder or hydraulic means additionally being required. When the attachment of the invention is installed, and one activates the control lever for UP position, the lift arms raise outside of a square or sliding tube in telescopic arrangement to position a stop pin in place. In this manner, the attachment of the invention as coupled to the hydraulic lift arm is activated and, also having the other end being connected to the gage wheels, they are thus caused to be activated without the use of raising tools. After the attachment engages the stop pin that is in the sliding slot, then the tools are pulled all the way out of the ground, as desired.

Thus, it is seen that the improvement and invention is 3,3QZJZ9 Patented Feb. 7, 1967 ice not an invention to control the gage wheels out of the ground, but for controlling them when the tool to which they are attached is in the ground so as to gage the depth of the penetration of the soil according to the desires and control of the operator. When the hydraulic control lever is pulled into the UP position, and the tool comes out of the ground, the gage wheels come up and off of the ground and are taken care of in this way automatically.

Referring now more particularly to the drawings, there is shown in FIGURE 1 a rear portion of a tractor 10 in which there is a farm implement 12 shown in part being drawn by the tractor. Connecting the tractor to the farm implement 12 is the tractor pull tug 14 which is connected by a pin 16 at the tractor and a pin 18 at the farm implement. The attachment 20a as more particularly shown in FIGURE 5, comprising the V arms 20 with the pair of telescopic arms 22, 24, are shown connected to the tractor pull tug 14 at one end and to a

hydraulic lift arm

64, 64 which is also shown at the distal end as being pivotally connected to the tractor by pin 30.

The attachment 20a includes a

levelling screw

32, 34 for the pair of telescopic arms 22, 24, as well as a pair of

pull springs

36, 38 and 40, 42.

The telescopic arms 22 comprise a pair of members that are interengagingly constructed of an inner and an outer tubing that is generally square in configuration. The outer or female member 44 is of a tubing construction and is connected at one end to the levelling screw 32, and a portion of the female member is provided with an elongated slot 48. The outer member engages an inner or male member 50, and there is provided

certain apertures

52, 52 for receiving a stop pin or bolt 54. The bolt 54 includes a nut and washer for holding it in place, as desired.

While FIGURE 2 shows the general arrangement of the tractor pull tug 14 between the tractor 10 and the farm implement 12, it is seen that the attachment means of the present invention is disposed between lines 44 of FIGURE 2 and as more clearly shown in FIGURE 4. Also incident to the present invention, there are provided for connecting between the V arms 20 and the rock shaft a connecting rod arrangement 60 that is threadedly ad justed in length to provide the necessary adjustment between the V arms 20 and the hydraulic lift arms 64.

By actuation of the

hydraulic lift arms

64, 64 in the conventional manner, and by use of the additionally provided V arms 20 and the attachment arm 60, there is provided the result of the present invention by use of the attachment including the

fixed spring members

36, 38, 40, 42, together with the telescopic arms with their respective elongated slots and stop pins. FIGURE 3 shows that instead of the threaded adjustment that may be made in connection means 60, that a stop pin and adjustable bar arrangement 60a may be provided in lieu of the treaded couplings as shown in FIGURE 2.

The V arms 20 as shown in FIGURE 5, are connected to the

pins

68, 68 at one end, also shown in FIGURE 2 and are connected to the rock arm 60a by pin 70 as is shown in FIGURES 1 and 3. As shown in FIGURE 3, any movement of the rock arm 60, 60a is transferred to the rock shaft 65, which in turn is connected to a gage wheel arm 69 that pushes down as shown in FIGURE 2 on a gage wheel 67 which will control the depth of the tool in the ground according to the desire of the operator on the tractor. This is accomplished by using the conventional hydraulic means as connected to the

hydraulic lift arms

64, 64 selectively that are provided respectively on the tractor 10. A rock shaft 65 is attached to the adjustable bar arrangement 60a, as shown, and a gage wheel 67 is connected to the rock shaft.

It should be understood that the specific apparatus herein illustrated and described are intended to be representative only, as many changes may be made therein without departing from the clear teachings of the invention. Accordingly, reference should be made to the following claims in determining the full scope of the invention.

What is claimed is:

1. Means for controlling gage wheels and tools being lifted out of or into the ground by a tractor having a pair of hydraulic lift arms and a pair of pull tugs, said means including a tool bar pivotally connected to said pull tugs, a rock shaft connected to said tool bar, gage lever arm mean connected to said rock shaft and having gage wheel means mounted thereon, a rock arm connected to said rock shaft, a V-shaped member having the ends of the arms thereof connected to said lift arms and having the other end connected to said rock arm, said attachment means further including square-configured telescopically adjustable male and female members having one end pivotally connected to said lift arms and the other end pivotally connected to said pull tugs, said female members each having an elongated slot in a peripheral portion thereof, said male members each having a stop pin insertable therein and for engaging an end of the elongated slot when in operation for lifting said gage wheels and tools from out of the ground and means to bias said male and female members into engagement with each other for displacing said stop pin from an end of the elongated slot.

2. The invention according to claim 1 wherein pull springs are provided to provide the bias means for said telescopic members.

3. The invention according to claim 1 wherein a leveling screw is provided to adjust the attachment means.

References Cited by the Examiner UNITED STATES PATENTS 2,541,964 2/1951 Hennings 172-50l 2,915,130 12/1959 Todd 1723Z1 X 3,068,944 12/1962 Renshaw 172449 3,116,939 1/1964 Ward 172-450 OTHER REFERENCES 243,037 1/ 1963 Australia.

ABRAHAM G. STONE, Primary Examiner.

ANTONIO F. GUIDA, Examiner.

J. R. OAKS, Assistant Examiner.

Claims

1. MEANS FOR CONTROLLING GAGE WHEELS AND TOOLS BEING LIFTED OUT OF OR INTO THE GROUND BY A TRACTOR HAVING A PAIR OF HYDRAULIC LIFT ARMS AND A PAIR OF PULL TUGS, SAID MEANS INCLUDING A TOOL BAR PIVOTALLY CONNECTED TO SAID PULL TUGS, A ROCK SHAFT CONNECTED TO SAID TOOL BAR, GAGE LPEVER ARM MEANS CONNECTED TO SAID ROCK SHAFT AND HAVING GAGE WHEEL MEANS MOUNTED THEREON, A ROCK ARM CONNECTED TO SAID ROCK SHAFT, A V-SHAPED MEMBER HAVING THE ENDS OF THE ARMS THEREOF CONNECTED TO SAID LIFT ARMS AND HAVING THE OTHER END CONNECTED TO SAID ROCK ARM, SAID ATTACHMENT MEANS FURTHER INCLUDING SQUARE-CONFIGURED TELESCOPICALLY ADJUSTABLE MALE AND FEMALE MEMBERS HAVING ONE END PIVOTALLY CONNECTED TO SAID LIFT ARMS AND THE OTHER END PIVOTALLY CONNECTED TO SAID PULL TUGS, SAID FEMALE MEMBERS EACH HAVING AN ELONGATED SLOT IN A PERIPHERAL PORTION THEREOF, SAID MALE MEMBERS EACH HAVING A STOP PIN INSERTABLE THEREIN AND FOR ENGAGING AN END OF THE ELONGATED SLOT WHEN IN OPERATION FOR LIFTING SAID GAGE WHEELS AND TOOLS FROM OUT OF THE GROUND AND MEANS TO BIAS SAID MALE AND FEMALE MEMBERS INTO ENGAGEMENT WITH EACH OTHER FOR DISPLACING SAID STOP PIN FROM AN END OF THE ELONGATED SLOT.