[특허]Ultrasonic bubble detector

Ultrasonic bubble detector 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-029/02
출원번호	US-0408269 (1973-10-23)
발명자 / 주소	Namery Jerry (21 Larkspur Way Natick MA 01760)
인용정보	피인용 횟수 : 68 인용 특허 : 0

초록 ▼

The mode of operation is by ultrasonic through-transmission, and the detector is preferably employed for detecting air bubbles in intravenous feeding tubes to prevent air embolism. Transmission of sound from the transmitter, via the sensor head, to the receiver of the detector is dependent upon the existence of a fluid within the tubing. Acoustic losses, operating frequency, and the distance between transmitter and receiver are optimized to permit constructive-interference of energy transmitted to and reflected from the receiver, resulting in a partial standing wave as in a resonant cavity. If an air bubble passes through the sensor head a large acoustic discontinuity occurs, causing ultrasound to scatter and reflect from its normal path. These losses allow little ultrasonic energy to couple to the receiver. The sensor head includes oppositely and spacedly disposed cylindrical sound pipe segments having facing tubing accommodating recesses, and respectively connecting to the transmitter and receiver. Sound pipe segments have a markedly higher refractive index in comparison with the feeding tubing and its liquid contents causing ultrasound energy to focus towards the center of the feeding tube, thereby yielding greatest sensitivity to transmittion losses through the fluid within the feeding tube.

대표청구항 ▼

An ultrasonic through-transmission bubble detector for use with a hollow, flexible tube for feeding liquid and comprising: a first sound coupling element arranged on one side of the tube and having one end defining a concave lensing surface contacting the tube; transducer means coupled to the other end of said first sound element; means applying a signal to said transducer means for causing said transducer means to establish a collimated ultrasonic signal in the first sound element; a second sound coupling element arranged on the opposite side of the tube to the first sound element to unidirectionally receive the ultrasonic signal transmitted through the tube and the liquid disposed in the internal space defined by the tube; said second sound coupling element having one end defining a concave lensing surface contacting the tube; said first and second element lensing surfaces extending about a major circumference of the tube but defining a gap between the facing element ends; the total gap circumference being less than the lensing surface circumference; said first and second sound coupling elements both being constructed of a material having a greater acoustic velocity than that of the liquid or tube to provide a first refractive index between the first sound coupling element and tube greater than unity at the lensing surface of the first element, and a second reciprocal refractive index between the tube and second sound coupling element at the lensing surface of the second element; said lensing surfaces and said material in combination providing a lensing effect, respectively, whereby the beam pattern of the ultrasonic signal is converged inside the tube and collimating the ultrasonic signal with the minimum width of the beam pattern inside the tube being less thaN the inner diameter of the tube; and means coupled from the second sound element for receiving the collimated ultrasonic signal including means for establishing an alarm condition.

이 특허를 인용한 특허 (68)

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Stringham, Mark; Millis, Roger; Foley, John; Blaine, David, Air bubble detector.
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Robert Kline-Schoder ; Patrick J. Magari, Bubble measuring instrument and method.
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Robert Kline-Schoder ; Patrick J. Magari, Bubble measuring instrument and method.
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Cassidy,David E.; May,Eric; Bucchianeri,Richard, Capacitor-based gas detection in an intravenous fluid delivery system.
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Subramaniam, Raj; Sparks, Kurt D., Catheter system including an embolism protection device.
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Minard, James J.; Bush, Mark E., Concentrate level sensing.
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Minard, James J.; Bush, Mark E., Concentrate level sensing.
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Takahashi, Tomio; Yamabe, Masanori, Cover film sticking device.
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Zippel, Burkhard; Helms, Martin; Chandler, Mark; Harrall, Simon J., Dart detector for wellbore tubular cementation.
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Aldrovandi Mauro (Mirandola ITX) Facchini Mauro (Mirandola ITX), Detector of bubbles in blood.
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Liebermann Leonard N. (La Jolla CA), Device for detecting inhomogeneities such as gas bubbles.
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Cewers Goran,SEX, Device for transmitting information via a patient tube in an intensive care or anesthetic machine.
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Lawless Michael W. ; Soberon Peter A. ; Scherer Andrew J. ; Squarcia Stephanie R., Drug infusion pumping cassette latching mechanism.
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Oruklu, Meriyan; Ruchti, Timothy L.; Kotnik, Paul T.; Belkin, Anatoly S., Infusion system which utilizes one or more sensors and additional information to make an air determination regarding the infusion system.
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Colley Peter S. (Seattle WA) Martin Roy W. (Redmond WA), Intravascular catheter including untrasonic transducer for use in detection and aspiration of air emboli.
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Bilstad Arnold C. (Deerfield IL) Wicnienski Michael (Antioch IL), Liquid absence detector.
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Stasz ; Peter ; Patten ; Floyd R., Liquid velocity measuring system.
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De Smit, Joannes Theodoor; Banine, Vadim Yevgenyevich; Bisschops, Theodorus Hubertus Josephus; Dierichs, Marcel Mathijs Theodore Marie; Modderman, Theodorus Marinus, Lithographic apparatus and device manufacturing method.
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De Smit, Joannes Theodoor; Banine, Vadim Yevgenyevich; Bisschops, Theodorus Hubertus Josephus; Dierichs, Marcel Mathijs Theodore Marie; Modderman, Theodorus Marinus, Lithographic apparatus and device manufacturing method.
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De Smit, Joannes Theodoor; Banine, Vadim Yevgenyevich; Bisschops, Theodorus Hubertus Josephus; Modderman, Theodorus Marinus; Dierichs, Marcel Mathijs Theodore Marie, Lithographic apparatus and device manufacturing method.
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Yardimci, Atif M.; Acikgoz, Serhan, Medical fluid air bubble detection apparatus and method.
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Yu Ho (Murrysville PA), Method and apparatus for controlling the heat transfer of liquid coolant in continuous casting.
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Bostrom, Neil; Griffin, Douglas D.; Kleinberg, Robert L., Method and apparatus for the detection of bubble point pressure.
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Riley, Timothy A.; Stringham, Mark D.; Blaine, David H.; Crandall, Frank A.; Eggers, Philip N., Method for making and using an air bubble detector.
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Riley, Timothy A.; Stringham, Mark D.; Blaine, David H.; Crandall, Frank A.; Eggers, Philip N., Method of making a universal bubble detector.
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Oruklu, Meriyan; Ruchti, Timothy L.; Kotnik, Paul T.; Belkin, Anatoly S.; Markey, Brian G., Multi-sensor infusion system for detecting air or an occlusion in the infusion system.
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Ohnishi, Takao; Yoshioka, Kunihiko; Fujita, Shuhei, Passage detection apparatus of object.
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Ohnishi, Takao; Yoshioka, Kunihiko; Fujita, Shuhei, Passage detection apparatus of object.
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Derek,Daw J.; Creech,Jeffrey L.; Patterson,William R., System and method of evaluating or calibrating a bubble detector.
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Ruchti, Timothy L.; Khair, Mohammad M., System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy.
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St. John Peter A. (Adelphi MD), Ultrasonic bubble detector.
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Crandall, Frank Anthony; Allen, Blake; Stringham, Mark; Luis, Joseph; Jovic, Olga; Blaine, David, Ultrasonic instrument using langevin type transducers to create transverse motion.
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Buckin Vitaly,IEX ; De Maeyer Leo,DEX ; Funck Theodor,DEX, Ultrasonic measurement equipment with at least one non-piezoelectric resonator chamber body and outer electroacoustic tr.
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Abts Leigh R. (Providence RI), Ultrasonic particulate sensing.
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Abts Leigh R. (Providence RI), Ultrasonic particulate sensing.
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Meisberger Artur,DEX, Ultrasonic transmitter particularly for an air bubble detector.
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Riley, Timothy A.; Stringham, Mark D.; Blaine, David H.; Crandall, Frank A.; Eggers, Philip N., Universal air bubble detector.
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Riley, Timothy A.; Stringham, Mark D.; Blaine, David H.; Crandall, Frank A.; Eggers, Philip N., Universal air bubble detector.
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Riley, Timothy A.; Stringham, Mark D.; Blaine, David H.; Crandall, Frank A.; Eggers, Philip N., Universal air bubble detector.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Ultrasonic bubble detector 원문보기

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이 특허를 인용한 특허 (68)

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