Ophthalmic injection device using shape memory alloy
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United States of America Patent
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Jan 4, 2011
Issued Date -
N/A
app pub date -
May 22, 2007
filing date -
May 17, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
An ophthalmic injection device has a dispensing chamber housing, a needle fluidly coupled to a dispensing chamber, a power source for providing current to the dispensing chamber housing, a controller for controlling the power source, and a housing at least partially enclosing the dispensing chamber housing, the power source, and the controller. The dispensing chamber housing is made of a shape memory alloy and has an inner surface defining a dispensing chamber for receiving a quantity of a substance. The controller directs a first current to the dispensing chamber housing to heat the substance contained in the dispensing chamber and a second current to the dispensing chamber housing to alter the shape of the dispensing chamber housing to deliver the substance.
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