专利名称：Air-puff tonometer发明人：Masayuki Hideshima申请号：US07/231293申请日：19880812公开号：US04996990A公开日：19910305
摘要：An air-puff tonometer, in which a puff of compressed air is blown out through anozzle (N) toward the cornea of a subject eye (H), said compressed air being produced byenergizing with an electric current a piston drive, which when thus driven compresses theair within a cylinder (5) in which the piston is mounted. The tonometer is provided with:pressure detector (11) for detecting the pressure within the cylinder (5); and currentcontrol (12, 14) for comparing a pressure signal (Vp) outputted from said pressuredetector (11) with a predetermined reference signal (Vt) and for controlling the currentsupplied to said piston drive in such a manner that the difference between said pressuresignal and said reference signal will be reduced.
The air-puff tonometer so constructed will allow air within the cylinder thereof to becompressed in accordance with a predetermined pressure-time characteristic curve inspite of any change occurring in the clearance between the piston and the cylinder walls.< P>
Other tonometers are also disclosed which are arranged to detect the actual air- puffpressure at the moment the cornea flattens.
申请人：TOKYO KOGAKU KIKAI KABUSHIKI KAISHA
代理机构：Finnegan, Henderson, Farabow, Garrett & Dunner
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