Heat-activated drug delivery system and thermal actuators theref

Details Heat-activated drug delivery system and thermal actuators theref Heat-activated drug delivery system and thermal actuators theref

1995-06-07

1998-04-14

Rimell, Sam

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604151, 604131, 60527, A61M 500

Patent

active

057386587

ABSTRACT:
A thermal actuator, also known as a heat capacitance motor, derives its energy from the physical expansion of paraffin wax as it changes from solid to liquid when heated within an enclosure such as a cylinder. This energy is converted into mechanical force which causes translation of a piston slidably mounted within the cylinder, thus creating hydrostatic pressure which is converted to work. The thermal actuator may be utilized in various drug delivery systems in which the hydrostatic pressure created by the actuator is used expel the contents of a syringe.

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patent: 4772263 (1988-09-01), Dorman et al.
patent: 4804368 (1989-02-01), Skakoon et al.

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