초록 ▼

A manually operated pump sprayer that does not leak contents through the air inlet vent port during operation when the bottle is oriented so that the inlet vent port would be covered with liquid in a spray bottle to which the sprayer is mounted. The pump sprayer is devised as having an air inlet uni

A manually operated pump sprayer that does not leak contents through the air inlet vent port during operation when the bottle is oriented so that the inlet vent port would be covered with liquid in a spray bottle to which the sprayer is mounted. The pump sprayer is devised as having an air inlet unit which includes the air inlet vent port in liquid communication with an extension tube which in turn is in liquid communication with a storage volume which in turn is in liquid communication with a liquid control orifice. An entrance end to the tube is positioned at a location farthest from the discharge exit opening of the sprayer, and the liquid control orifice is positioned closer to the exit opening such that when spraying in a downward direction such entrance end is always above the liquid level in the storage volume. Otherwise the entrance end is arranged as to be closer to the exit opening compared to the liquid control orifice such that when spraying in an upward direction the entrance end is above the liquid level in the storage volume.

대표청구항 ▼

[ What is claimed is:] [1.] A manually operated pump sprayer that will not leak liquid through an air inlet vent port when operated at an orientation at which said air inlet vent port would be covered with liquid when the sprayer is mounted on a bottle of liquid to be dispensed, but will admit air t

[ What is claimed is:] [1.] A manually operated pump sprayer that will not leak liquid through an air inlet vent port when operated at an orientation at which said air inlet vent port would be covered with liquid when the sprayer is mounted on a bottle of liquid to be dispensed, but will admit air to replace the liquid that is dispensed, comprising:an air inlet unit having a liquid control orifice that is sized so as to control the rate of liquid flow therethrough, said liquid control orifice being in fluid communication with a storage volume of said unit that is sized so as to act as a reservoir to hold any said liquid that flows through said liquid control orifice, an extension tube of said unit in open communication at one entrance end thereof with said storage volume and at an opposite end thereof with said air inlet vent port, said one end of said extension tube being above the liquid level in the storage volume so as to prevent liquid from entering the extension tube, and said air inlet vent port being sized to admit air into the bottle to replace the liquid that is dispensed.