Patent ID: 7000806
Filing Date: 2006-02-21
Classification: A61F,B05B,B65D

Abstract:
1. A dispenser for dispensing a fluid, comprising: a housing; and a flexible bladder mounted within the housing and defining an interior chamber within the flexible bladder, and a fluid-receiving chamber between the flexible bladder and the housing; and first means for creating a first pressure within the fluid-receiving chamber greater than a second pressure within the interior chamber of the bladder and thereby preventing the ingress of gases or vapors into the fluid-receiving chamber, wherein the bladder is capable of being penetrated by a needle or like injection member for introducing a predetermined substance into the fluid-receiving chamber, and the bladder includes a first portion substantially infusible in response to the application of thermal energy thereto and compatible with the substance to be received within the fluid-receiving chamber, and a second portion overlying the first portion and fusible in response to the application of thermal energy thereto for forming a substantially fluid-tight seal between the flexible bladder and fluid-receiving chamber in a region thereof penetrable by the needle or like injection member.