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公开(公告)号:US20170135531A1
公开(公告)日:2017-05-18
申请号:US15350185
申请日:2016-11-14
CPC分类号: A47K5/14 , A47K5/16 , B05B7/0018 , B05B7/0416 , B05B7/2402 , F04B13/02 , F04B43/0045 , F04B43/025 , F04B43/026 , F04B43/04 , F04B53/10
摘要: A sequentially activated multi-diaphragm foam pump for a foam dispenser includes a housing with a liquid pump portion and air pump portion secured to the housing. The liquid pump portion has a liquid inlet, a liquid inlet valve, a liquid pump diaphragm, a liquid outlet valve, and a liquid outlet. The air pump portion has a first and second air inlet, a first and second air inlet valve, a first and second air pump diaphragm, and a first and second air outlet. The sequentially activated multi-diaphragm foam pump also includes a mixing chamber that is in fluid communication with the liquid outlet, the first air outlet, and the second air outlet. The liquid pump diaphragm, the first air pump diaphragm, and the second air pump diaphragm operate in sequential order. The liquid pump diaphragm pumps liquid into the mixing chamber, the first air pump diaphragm pumps air into the mixing chamber to mix with the liquid to form a liquid air mixture, and the second air pump diaphragm pumps air into the mixing chamber to mix with the liquid air mixture to form a foamy mixture. The foamy mixture is dispensed through an outlet that is in fluid communication with the mixing chamber.