SPRING ENGINE DRIVEN FLUID DISPENSING SYSTEM

摘要

A fluid dispensing system provides a sprayer. The system has a container wit h liquid fluid, such as used in lawn and garden weed control and fertilization . The sprayer has a handle containing a spring engine and a pump for liquid from the container. The spring engine has a flat spring having a spring band extending from two coil s wound on two shafts. One of the coils is manually wound by a crank connected to a sha ft on which the coil is connected. The other shaft is connected to the pump by a rotary cam driver. Liquid is sucked by the pump into a pump chamber during part of a cycle of rotation of the other shaft when the coils are unwound and the liquid is pumped out of t he chamber during the other part of the cycle of rotation to a sprayer head on the sprayer handle.