Battery operated portable hydromassage appliance

Claim 1

A hydromassage appliance comprising a housing having an inlet and an outlet; a water pump positioned in said housing for drawing water from said inlet and expelling water from said outlet; DC motor means positioned in said housing and mechanically connected to said water pump for driving said water pump in response to an electrical signal; a rechargeable DC source positioned in said housing and electrically connectable to said motor means for providing the electrical signal; comparator means for comparing first and second signals and for providing an output; electric switch means positioned in said housing and electrically connected to said output of said comparator means for electrically disconnecting said motor means in response to a predetermined signal; low battery detector means electrically connected to said comparator means and positioned in said housing for electrically determining the voltage level of said DC source, said low battery detector means also being capable of generating said first signal to said comparator means in response to the sensed level of voltage of said DC source, said first signal being indicative of the level of voltage of said DC source being at or above a predetermined level; and electrical frequency oscillator means positioned in said housing for providing a pulsed second signal to said comparator means such that said comparator means bias said electrical switching means in accordance with said pulsed second signal and allow said motor means to be alternatively electrically connected and disconnected in a pulsating manner to said DC source at a rate of about five hertz when said first and second signals are received from said low battery detection circuit means and said frequency oscillator means respectively whereby a pulsed water output is created.