LEG OPERATED ACTUATION APPARATUS TO PRESSURIZE A BACKPACK TYPE LIQUID SPRAY PUMP

摘要

LEG OPERATED ACTUATION APPARATUS TO PRESSURIZE A BACKPACK TYPE LIQUID SPRAY PUMP The present invention is a specially designed leg operated actuation apparatus to pressurize a backpack type liquid spray pump for agriculture and horticulture use in which the actuation system for creating pressure in the chamber makes use of mechanical advantage of human movement. The invention makes use of a combination of mechanical linkages which amplify the movement of both thighs and legs of the operator, into a linear reciprocating motion used for pumping action but with a minimum stress on the body parts of the operator. The present invention uses the movement of the calf and thy keeping the knee as the fulcrum i.e. pivot point to move the pump through link mechanism and produce the required pressure through the hydraulic pump in the tank. The pressure generated on the liquid is thus dependent only on walking distance of the operator regardless of his weight, and strength.