Fluid discharging device

A fluid discharging device comprising:

• a collapsible fluid container comprised of flexible material for containing fluid, said container having an opening therein;
• and
• a double one-way valve mechanism mounted to said container within said opening for discharging a predetermined quantity of the fluid from said container,
• said double one-way valve mechanism comprising a cylinder in which a suction chamber is defined, a cylindrical piston slidably mounted to said cylinder, and a resilient member disposed between said cylinder and said piston for resiliently biasing said cylinder and said piston in respective opposite directions,
• said cylinder having one open end thereof in communication with the suction chamber and disposed at a location adjacent the outer peripheral surface of said container, and a first one-way valve comprising a resilient flap integral with the cylinder and extending over said one open end, said integral flap movable in a direction extending away from said suction chamber between a first position at which said open end is covered by said resilient flap and a second position at which said open end and said suction chamber in communication therewith are exposed to the environment outside said container, said resilient flap self-biased toward said first position whereby said open end is normally covered,
• said piston having a sliding portion extending within said cylinder for sliding therein, a suction opening extending between the interior of said container and said suction chamber, and a second one way valve located between said suction opening and said suction chamber for selectively placing the interior of said container in communication with said suction chamber via said suction opening, said second one-way valve comprising a second resilient flap integral with said sliding portion, said second resilient flap movable in a direction extending toward said suction chamber between a first position at which said second resilient flap closes said suction chamber to the interior of said container and a second position at which said second resilient flap places the interior of said container in open communication with said suction chamber.