Hydraulic wheel drawbar

Claim 1

IN AN AGRICULTURAL IMPLEMENT HAVING A PART TO BE MOVED IN TWO STAGES BETWEEN TWO POSITIONS, MECHANISM FOR MOVING SAID PART FROM ONE POSITION TO ANOTHER, COMPRISING AN EXTENSIBLE AND RETRACTABLE POWER MEANS, A PAIR OF PIVOTALLY MOUNTED ARMS ON WHICH SAID POWER MEANS IS CARRIED, MOTION TRANSMITTING MEANS CONNECTING ONE OF SAID ARMS WITH SAID PART, A FIRST STOP MEANS ENGAGEABLE WITH THE OTHER OF SAID ARMS WHEREBY EXTENSION OF SAID POWER MEANS ACTS TO SHIFT SAID ONE ARM AND THE ASSOCIATED PART IN ONE DIRECTION FROM ONE OF THEIR POSITIONS PARTWAY TOWARDS THEIR OTHER POSITION, A SECOND STOP MEANS DISPOSABLE IN A POSITION ADJACENT SAID ONE ARM TO HOLD THE LATTER AGAINST REGRESSIVE MOVEMENT OUT OF THE POSITION TO WHICH IT IS MOVED, WHEREBY RETRACTION OF SAID POWER MEANS ACTS TO SHIFT SAID SECOND ARM AWAY FROM SAID FIRST STOP MEANS, A THIRD STOP MEANS ENGAGEABLE WITH SAID OTHER ARM TO HOLD THE LATTER IN THE POSITION TO WHICH IT IS MOVED AWAY FROM SAID FIRST STOP MEANS BY RETRACTION OF SAID POWER MEANS, WHEREBY A SUBSEQUENT EXTENSION OF SAID POWER MEANS, ACTS TO SHIFT SAID FIRST ARM AND SAID ASSOCIATED PART THE REST OF THE WAY INTO THEIR OTHER POSITION.