Patent ID: 6371333
Filing Date: 2002-04-16
Classification: B05B

Abstract:
A modular dispenser for dispensing a fluid substance, comprising:(a) a plurality of storage containers (1; 101) for receiving the fluid substance, each of said storage container having an upper portion containing an upper opening (6; 106); (b) a plurality of dispensing head means (2; 102; 202) each including a dispensing passage (2c; 102c; 202c); (c) dispensing pump means including: (1) a vertically arranged tubular cylinder (20) having upper and lower ends; (2) a piston (10) slidably mounted collinearly within said upper end of said cylinder, said piston having upper and lower ends, said piston containing a through bore extending between said upper and lower piston ends; (3) said cylinder lower end having a lower inlet passage (24; 124) containing a first transverse wall defining a pump chamber (30) within the lower end of said cylinder said first transverse wall containing a plurality of first pump chamber inlet openings (36); (4) first check valve means (32) normally closing said pump chamber inlet openings (36), thereby to control communication between said inlet passsage and said pump chamber via said inlet openings; (5) said piston including a second transverse wall containing a plurality of second pump chamber openings (36â€²); and (6) second check valve means (31) carried by said piston lower end for normally closing said second pump chamber outlet openings (36â€²), thereby to control communication between said pump chamber and said piston through bore; and (d) means interchangeably connecting said dispensing pump between any one of said storage containers and any one of said dispensing head means, said dispensing pump inlet openings being arranged adjacent said storage container upper opening, thereby to permit direct contact of said inlet openings with the fluid material to be dispensed from the container, said dispensing pump outlet openings being in communication with said dispensing head dispensing passage, thereby to permit said dispensing pump means to be selectively connected with one of said storage containers and one of said dispensing head means, respectively.