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公开(公告)号：EP0542982A4
公开(公告)日：1994-03-24
申请号：EP92912799
申请日：1992-06-05
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , GOLOSKI LEONARD F SR
CPC classification number: A61M5/16854
Abstract: The present invention provides an improved, low cost method and apparatus for monitoring the intravenous metering of fluids to a patient. The present invention provides a strain gauge (R1, R2) which is preferably a balanced metal beam (120). Conditioning circuitry is provided which has as input the strain gauge output. The output of the conditioning circuit is inputted into occlusion sensing circuit. The output of occlusion sensing circuit is inputted into an air sensing circuit. The output of both the occlusion sensing circuit and the air sensing circuit are inputted into an analog to digital convertor which is monitored by a microprocessor for abnormal signals.
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公开(公告)号：CA2019377C
公开(公告)日：1997-01-14
申请号：CA2019377
申请日：1990-06-20
Applicant: SHARP KK , BAXTER INT
Inventor： KAWAHARA MASAFUMI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
Abstract: A stepping motor driving apparatus includes a stepping motor and a pulse output circuit for outputting drive pulses for driving the stepping motor. A pulse generator generates further pulses which have a frequency higher than thatof the drive pulses. A gate circuit receives the drive pulses from the pulse output circuit and the further pulses from the pulse generator. The further pulses are output by the gate circuit during the high interval of each drive pulse. The stepping motor is thereby driven by pulses having a duty ratio that varies with the frequency of the further pulses.
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公开(公告)号：CA2015558C
公开(公告)日：1994-11-08
申请号：CA2015558
申请日：1990-04-26
Applicant: BAXTER INT , SHARP KK
Inventor： SAKAI EIICHI , BOWMAN GEORGE A , D SILVA EDMUND D
Abstract: An air detector according to the present invention utilizes a unitary type sensor for detecting air bubbles or columns in an infusion solution flowing through a tube. Because of a unique design for a tube-receiving groove and a cooperating abutting member, the difficulty in loading a tube heretofore encountered with the use of unitary type sensor is avoided. Thus, the tube can be loaded in the air detector easily with good reliability.
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公开(公告)号：DE69005924T2
公开(公告)日：1994-08-04
申请号：DE69005924
申请日：1990-06-27
Applicant: SHARP KK , BAXTER INT
Inventor： KAWAHARA MASAFUMI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
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公开(公告)号：GB2312049A
公开(公告)日：1997-10-15
申请号：GB9614161
申请日：1996-07-05
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , ESCHE GRACE
Abstract: A method or means suitable for monitoring a battery comprises: (1) monitoring the voltage and current levels of a battery, (2) using these levels to determine the charge remaining on said battery and (3) displaying said charge remaining on said battery. The voltage and current levels may be alternately sampled and an estimate of the amount of battery operation time left may be given. The arrangement may be employed in combination with an infusion pump. Details relating to the method and means are described.
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Patent Agency Ranking
公开(公告)号：CA2087975A1
公开(公告)日：1992-12-11
申请号：CA2087975
申请日：1992-06-05
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A
Abstract: 2087975 9222337 PCTABS00018 The present invention provides an improved, low cost method and apparatus for monitoring the intravenous metering of fluids to a patient. The present invention provides a strain gauge (R1, R2) which is preferably a balanced metal beam (120). Conditioning circuitry is provided which has as input the strain gauge output. The output of the conditioning circuit is inputted into occlusion sensing circuit. The output of occlusion sensing circuit is inputted into an air sensing circuit. The output of both the occlusion sensing circuit and the air sensing circuit are inputted into an analog to digital convertor which is monitored by a microprocessor for abnormal signals.
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公开(公告)号：CA2019377A1
公开(公告)日：1990-12-28
申请号：CA2019377
申请日：1990-06-20
Applicant: SHARP KK , BAXTER INT
Inventor： KAWAHARA MASAFUMI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
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公开(公告)号：GB2312046B
公开(公告)日：2000-08-16
申请号：GB9614624
申请日：1996-07-11
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , MATTHEWS JOSEPH B , EYSTER KURT
Abstract: The present invention provides an apparatus for detecting excessive air in a liquid flow-through tube. The apparatus includes an ultrasonic transmitter for transmitting ultrasonic signals and an ultrasonic receiver for receiving ultrasonic signals. The ultrasonic transmitter and ultrasonic receiver are separated by the IV tube. The apparatus further provides circuit means for generating at least two transmitting signals to actuate the ultrasonic transmitter and circuit means for detecting received signals. Means are provided for determining whether the received signal is indicative of air or liquid in the IV tube. The apparatus further relies on logarithmic detection of air in fluids rather than linear detection which provides a larger safety factor in prediction of air embolus.
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公开(公告)号：DE69030132T2
公开(公告)日：1997-10-02
申请号：DE69030132
申请日：1990-04-24
Applicant: SHARP KK , BAXTER INT
Inventor： SAKAI EIICHI , BOWMAN GEORGE A , D SILVA EDMUND D
Abstract: An air detector (13) according to the present invention utilizes a unitary type sensor for detecting air bubbles or columns in an infusion solution flowing through a tube (23). Because of a unique design for a tube-receiving groove (15) and a cooperating abutting nember (25), the difficulty in loading a tube heretofore encountered with the use of unitary type sensor is obviated. Thus, the tube can be loaded in the air detector easily with good reliability.
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公开(公告)号：CA2015557C
公开(公告)日：1995-01-24
申请号：CA2015557
申请日：1990-04-26
Applicant: SHARP KK , BAXTER INT
Inventor： GOI NOBUAKI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
Abstract: A rotary encoder comprises a rotary plate having a plurality of primary slits defined in the rotary plate in a circular row coaxial with the axis of rotation of the rotary plate. The rotary plate also has at least one reference slit defined therein at a position radially of the circular row of the primary slits. A primary photoelectric detector including a source of light and a photo-sensor positioned one above the other with the circular row of the primary slits intervening therebetween is used to detect the passage of the primary slits therethrough while an auxiliary photoelectric detector including a source of light and a photo-sensor positioned one above the other with the path of travel of the reference slit intervening therebetween is used to detect the passage of the reference slit therethrough.
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