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

1992-04-02

1993-11-23

Husar, Stephen F.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

604 67, F01B 2910, A61M 3100

Patent

active

052633233

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.

REFERENCES:
patent: 4899910 (1990-02-01), Tabei et al.
patent: 5025627 (1991-06-01), Schneider

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