Hydraulic hand pump

Claim 1

A HYDRAULIC HAND PUMP INCLUDING A BODY MEANS, A FLUID RESERVOIR CONNECTED WITH SAID BODY MEANS, A PAIR OF PUMPING PISTONS RECIPROCABLY MOUNTED WITHIN A PAIR OF CHAMBERS IN SAID BODY MEANS, INLET MEANS PROVIDING FLUID COMMUNICATION BETWEEN SAID RESERVIOR AND EACH OF SAID CHAMBERS AND INCLUDING ONE-WAY VALVE MEANS FOR ALLOWING FLUID FLOW IN ONE DIRECTION AND PREVENTING FLUID FLOW IN THE OPPOSITE DIRECTION, OUTLET MEANS IN FLUID COMMUNICATION WITH EACH OF SAID CHAMBERS AND INCLUDING ONE-WAY VALVE MEANS PERMITTING FLUID FLOW IN ONE DIRECTION AND PREVENTING FLUID FLOW IN THE OPPOSITE DIRECTION, BY-PASS MEANS INCLUDING A NORMALLY CLOSED VALVE ADAPTED TO OPEN AT A PREDETERMINED PRESSURE AND PROVIDING COMMUNICATION BETWEEN ONE OF SAID CHAMBERS AND SAID RESERVOIR, AND RELIEF MEANS PROVIDING COMMUNICATION BETWEEN SAID OUTLET MEANS AND SAID RESERVOIR, EACH OF SAID CHAMBERS INCLUDING SEAT MEANS AT THE LOWER PORTIONS OF THE CHAMBERS AGAINST WHICH THE ASSOCIATED PISTONS ARE ADAPTED TO SEAT UPON DOWNWARD MOVEMENT OF SAID HANDLE MEANS, A PIVOTALLY SUPPORTED, MANUALLY OPERABLE HANDLE MEANS, SAID HANDLE MEANS BEING CONNECTED TO EACH OF SAID PISTONS, AND DEPENDING STOP MEANS FORMED ON SAID HANDLE MEANS AND ADAPTED TO ENGAGE A PORTION OF SAID BODY MEANS FOR LIMITING DOWNWARD MOVEMENT OF SAID HANDLE MEANS, SUPPORT MEANS PIVOTALLY CONNECTED WITH AND EXTENDING UPWARDLY FROM SAID BODY MEANS, ONE END PORTION OF SAID HANDLE MEANS BEING PIVOTALLY CONNECTED WITH AN UPPER PORTION OF SAID SUPPORT MEANS, AND LATERALLY EXTENDING STOP PIN MEANS EXTENDING FROM SAID HANDLE MEANS AND ADAPTED TO ENGAGE A PORTION OF SAID SUPPORT MEANS UPON ROTATION OF SAID HANDLE MEANS ABOUT ITS PIVOTAL CONNECTION WITH SAID SUPPORT MEANS WHEREBY SAID STOP PIN MEANS SERVES TO LIMIT UPWARD MOVEMENT OF SAID HANDLE MEANS.