Patent ID: 7604183

Claim:
A method of supplying a lawn care liquid from a liquid supply tank on a wheel supported lawn care truck to a liquid distributing hose extending from a hose reel on the truck, the truck having an engine for driving a set of wheels and a truck battery charger for charging a truck battery, the method comprising the steps of: a) mounting an auxiliary battery supply on the truck, b) arranging the auxiliary battery supply to provide an output voltage greater than the output voltage of the truck battery, c) connecting a voltage converter between the truck battery and the auxiliary battery supply to provide for recharging the higher voltage auxiliary battery supply with the truck battery charger, d) connecting an electric motor driven hydraulic pump to the auxiliary battery supply, e) connecting the hydraulic pump by a hydraulic line to a hydraulic motor connected to drive a liquid distributing pump in a line extending between the liquid supply tank and the liquid distributing hose, f) shutting off the truck engine after the truck arrives at a lawn site where lawn care service is desired, g) operating the electric motor hydraulic pump from the auxiliary battery supply while the truck engine is shut off, h) operating the liquid distributing pump with the hydraulic motor while the truck engine is shut off, and i) recharging the auxiliary battery supply with the engine driven battery charger after the truck engine is restarted and the truck is moving to another lawn care site.