Appeal No. 2003-0468 Page 2
Application No. 09/447,752
BACKGROUND
The appellants' invention relates generally to the field of cataract surgery and
more particularly to a pumping chamber for a handpiece for practicing the liquefracture
technique of cataract removal (specification, p. 1). A copy of the dependent claims
under appeal is set forth in the appendix to the appellants' brief. Claims 1, 4 and 6, the
independent claims on appeal, read as follows:
1. A liquefracture handpiece, comprising:
a) a body having an irrigation lumen; and
b) a pumping chamber integral with the body and attached to the irrigation
lumen, the pumping chamber capable of producing pressure pulses with
i) a force of between 0.03 grams and 50.0 grams,
ii) a pressure pulse rise time of between 1 gram/second and 50,000
grams/second and
iii) a frequency of between 1 Hz and 200 Hz.
4. A liquefracture handpiece, comprising:
a) a body having a first irrigation lumen; and
b) a pumping chamber attached to the first irrigation lumen, the pumping
chamber capable of producing pressure pulses with a force of between 0.03
grams and 50.0 grams.
6. A liquefracture handpiece, comprising:
a) a body having an irrigation lumen; and
b) a pumping chamber integral with the body and attached to the irrigation
lumen, the pumping chamber capable of producing pressure pulses with a
pressure pulse rise time of between 1 gram/second and 50,000 grams/second.
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