Foam spraying head assembly for use on bottle, has resilient element located in upper chamber, and resilient valve located in lower chamber, where valve moves to close passage orifice in sealed manner or open orifice

摘要

The assembly (10) has a head (1) possessing a nozzle (11) connected to the head, and a filtering tube (13) located in a space (12) in the head. A cylinder (6) possesses an upper chamber and a lower chamber that contains a piston unit (5) and a link (4). A passage orifice is defined across the lower chamber. A resilient element (7) is located in the upper chamber and in contact between a valve (32) and an inner end of the upper chamber. A resilient valve is a spiral valve and located in the lower chamber. The valve moves to close the passage orifice in a sealed manner or open the orifice.