DEVICE FOR DISPENSING FLUID

摘要

A pump (14) for dispensing fluid that includes a pump head (30) having a mixing chamber (134) and a porous mem-ber (54). The pump head includes a tube (50) and diaphragm (34). The pump includes a cap (22) having a body (42) defining a cav-ity (101) that receives the tube. The cap is connected to the di-aphragm to define an air chamber (106) communicating with the mixing chamber. The pump includes a spring system (46) received in the tube and cavity. The tube, cavity, and spring system define a liquid chamber (122) that communicates with the mixing cham-ber. The spring system includes a spring (62) positioned to be com-pressed such that liquid is urged from the liquid chamber (122) to the mixing chamber and the diaphragm is configured to be com-pressed such that air is drawn from the air chamber to the mix-ing chamber. The liquid and air commingle into a mixture that is pushed through the porous member to form a product.