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Bellows

About: Bellows is a research topic. Over the lifetime, 15312 publications have been published within this topic receiving 73914 citations.


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Patent
21 Aug 1997
TL;DR: In this article, a detector for determining the volume and volumetric changes of respiratory gases in a closed circuit anaesthesia circuit having a bellows ventilator is presented. But, it is not shown that the volume of gas in the closed circuit anesthetic circuit is not changing, but is remaining at that corresponding to the given expanded position of the bellows.
Abstract: A detector for determining the volume and volumetric changes of respiratory gases in a closed circuit anaesthesia circuit having a bellows ventilator. The device includes a first sensor positioned with respect to the bellows for detecting and indicating when the bellows assumes a given expanded position in a bellows housing indicative of the given volume of respiratory gas in the circuit. A second sensor detects and indicates when the bellows assumes an expanded position indicative of the greater amount of expansion than that corresponding to the given expanded position. During respiratory cycles of the patient, indications from the first sensor in the absence of indications from the second sensor indicates that the volume of gas in the closed circuit anaesthesia circuit is not changing, but is remaining at that corresponding to the given expanded position of the bellows. Indications from both the first sensor and the second sensor indicates that the degree of expansion of the bellows is greater than that corresponding to the given expanded position and hence the volume of gas in the closed circuit anaesthesia circuit has increased. The absence of indications from both the first and second sensors indicates that the degree of expansion of the bellows is less than that corresponding to the given expanded position and that the volume of gas in the closed circuit anaesthesia circuit has decreased.

50 citations

Patent
21 Dec 1990
TL;DR: In this paper, a high temperature thermocouple sensing apparatus is readily removable from a gas turbine engine and sealed both openings through use of a pair of spherical sealing elements (62, 64) and a spring seal bellows (82).
Abstract: A high temperature thermocouple sensing apparatus (48) is readily removable from a gas turbine engine (10). The thermocouple extends through aligned openings (31, 34) in inner and outer housings (16, 12) and seals both openings through use of a pair of spherical sealing elements (62, 64) and a spring seal bellows (82) urging a seat (92) into sealing engagement with one sealing element (64) and urging the other sealing element (62) into engagement with the inner housing.

50 citations

Patent
27 Apr 1988
TL;DR: In this paper, a manual back-up emergency drive device for air driven artificial hearts, particularly for the "Jarvik-7" heart, is adapted to be instantly connected to the air drive lines for the heart in the event of power and air pressure failures and manually actuated to sustain the life of the heart recipient during the power failure.
Abstract: A manual back-up emergency drive device for air driven artificial hearts, particularly for the "Jarvik-7" heart, is adapted to be instantly connected to the air drive lines for the heart in the event of power and air pressure failures and manually actuated to sustain the life of the heart recipient during the power failure. The device includes a bellows type manually actuated pump with a pressure stroke and a suction stroke, and an air delivery tube emerging from the pump coupled to a pair of air tubes having quick disconnect coupling units on the ends thereof for mating with coupling units on the ends of the air drive tubes to the heart. The device also includes a metering valve in the tube serving the right ventricle of the heart, an instrument reading the metered and pumped air pressures pulsing through the system and a make-up air intake in the pump.

49 citations

Patent
20 Dec 1995
TL;DR: In this paper, a CVJ boot in which contact pressure of crest portions closer to a large-diameter mounting portion on the compressed side of a bellows portion is reduced when slant faces forming a root portion of a bending point obtained by the S-shaped bend come into contact with each other, thereby increasing durability.
Abstract: The invention relates to a CVJ boot in which contact pressure of crest portions closer to a large-diameter mounting portion on the compressed side of a bellows portion is reduced when slant faces forming a root portion of a bending point obtained by the S-shaped bend come into contact with each other, thereby increasing durability.

49 citations

Patent
19 Jun 1989
TL;DR: In this paper, a medical pumping system has a supply tube (2), an outlet tube (6), a readily sterilizable, disposable cassette (3) connected to the tubes and engaged with the pump, and means (22,24) such as a motor-driven piston, for intermittently applying pressure to the cassette.
Abstract: A medical pumping system has a supply tube (2), an outlet tube (6), a readily sterilizable, disposable cassette (3) connected to the tubes and engaged with the pump, and means (22,24) such as a motor-driven piston, for intermittently applying pressure to the cassette. The pumping system features a display and switch means (9, 10) on a front panel thereof, a pressure sensor (28), an optical fluid presence sensor (19), and a microprocessor (20) metering the volume of fluid pumped through said cassette (3), monitoring output signals from said sensors (18, 28), controlling the motor-driven piston in accordance with settings entered via said switch means (9,10), and directing output data to said display means (8). The microprocessor has a stored program for performing SET RATE, RUN, HOLD, VOLUME FED, and CLEAR VOLUME functions. The cassette includes a hydraulically self-actuating inlet valve (44) communicating with the supply tube (2), a hydraulically self-actuating outlet check valve (42) communicating with, and preventing backflow from, the outlet tube (6), a hollow, resilient compressible member, such as a bellows (34) having an interior communicating with the inlet and outlet valves, and a support structure (30,36,38) securing together the tubes, valves and bellows in operating relation. Preferably, the inlet and outlet valves are a unitary element.

49 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202358
2022118
202194
2020195
2019344
2018614