초록 ▼

A manually actuated pump sprayer has an unvalved vent port connected by a vent tube to a float buoyed on the liquid level within the container. A dip tube forming a liquid passage extends from a valve controlled inlet which leads into the pump chamber. A terminal end of the liquid passage defined by

A manually actuated pump sprayer has an unvalved vent port connected by a vent tube to a float buoyed on the liquid level within the container. A dip tube forming a liquid passage extends from a valve controlled inlet which leads into the pump chamber. A terminal end of the liquid passage defined by the dip tube is connected to the float for communicating that end with the liquid in the container, and a terminal end of the air passage defined by the vent tube is connected to the float for communicating the air passage terminal end with the head space in the container. The pressure within the head space is always maintained at atmospheric, and the sprayer is capable of being operated in any position without leakage. The tubes may formed as an integrally extruded double tube with air pockets formed along the length of the double tube to define the float. And, buoyant material forming the air passage may define the float.

대표청구항 ▼

A manually actuated pump sprayer having a pump body and closure means coupled to said body for mounting the sprayer on a container at least partially filled with a liquid to be sprayed, the container defining a head space above the liquid level, said pump body having a valve controlled inlet leading

A manually actuated pump sprayer having a pump body and closure means coupled to said body for mounting the sprayer on a container at least partially filled with a liquid to be sprayed, the container defining a head space above the liquid level, said pump body having a valve controlled inlet leading to a variable volume pump chamber, means defining an elongated liquid pick-up passage connected to said inlet, said pump body having an unvalved container vent port, and means defining an elongated air passage connected to said vent port, at least a terminal end of said liquid passage being connected to a float for communicating said terminal end with the liquid in the container, and at least a terminal end of said air passage being connected to said float for communicating said air passage terminal end with said head space.