초록 ▼

A portable surface cleaning apparatus has a base for movement along a surface to be cleaned and an upright handle pivotally attached to a rearward portion of the base. A fluid dispensing nozzle for applying fluid to the surface and a suction nozzle for picking up fluid and debris from the surface ar

A portable surface cleaning apparatus has a base for movement along a surface to be cleaned and an upright handle pivotally attached to a rearward portion of the base. A fluid dispensing nozzle for applying fluid to the surface and a suction nozzle for picking up fluid and debris from the surface are associated with the base. A clean water holding tank and a detergent holding tank are removably mounted to the handle while a recovery tank is removably mounted to the base. A mixing valve is fluidly connected between the holding tanks and the spray nozzle for changing the mixing ratio of the detergent with respect to the water. The fluid recovery tank includes an integrally molded conduit that extends from the suction nozzle and a mounting for an accessory hose that interrupts the fluid path from the suction nozzle in the conduit and redirects fluid flow through the hose. A pump is fluidly connected between the mixing valve and the dispensing nozzle and includes a pump priming valve that operates on negative air pressure to clear air from the fluid lines during pump operation. A free floating brush is pivotally attached to the base for automatically adjusting to different surface conditions during cleaning operations.

대표청구항 ▼

[ The embodiments for which an exclusive property or privilege is claimed are defined as follows:] [1.]1. An improved upright water extraction cleaning machine comprising a base adapted for movement across a supporting surface, a handle pivotally mounted to the base, a fluid pump having a fluid inle

[ The embodiments for which an exclusive property or privilege is claimed are defined as follows:] [1.]1. An improved upright water extraction cleaning machine comprising a base adapted for movement across a supporting surface, a handle pivotally mounted to the base, a fluid pump having a fluid inlet connected to at least one liquid holding tank and a fluid outlet connected to at least one spray nozzle to thereby transfer liquid from the at least one holding tank to the at least one spray nozzle under pressure and distribute the liquid onto the supporting surface, a suction nozzle mounted to the base to remove liquid and debris from the surface, and a vacuum source mounted to one of the base and the handle and connected to the suction nozzle to generate a working air flow for recovering the liquid and debris, the improvement comprising:a priming valve having a valve body with an interior chamber, a valve inlet port connected to the pump and a valve outlet port connected to the vacuum source, a valve element located within the interior chamber and movable between a priming position wherein the valve element is spaced from the valve outlet port such that liquid can be drawn into the interior chamber of the hollow body when the vacuum source is operating, and a sealing position wherein the valve element seats against the valve outlet port to block liquid from entering the vacuum source.