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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
20 Dec 1968
TL;DR: An expansible bellows having a variable internal volume is mounted in a housing adapted for implantation in the skull of a patient suffering from hydrocephalus as mentioned in this paper, where a tube extends from the bellows for insertion into a ventricle of the brain.
Abstract: An expansible bellows having a variable internal volume is mounted in a housing adapted for implantation in the skull of a patient suffering from hydrocephalus. A tube extends from the bellows for insertion into a ventricle of the brain. When so installed, the bellows is filled with ventricular fluid at an average or static pressure. Pulsation of choroid-plexus blood vessels in the brain tends to cause a periodic increase in fluid pressure, but bellows expansion in response to increased pressure minimizes the actual increase in fluid pressure. The resulting suppression of pulsatile pressure peaks and dissipation of energy by the bellows appears to be an effective technique for treating hydrocephalus.

44 citations

Patent
23 Sep 1991
TL;DR: In this paper, a flexible bellows is attached to the spout assembly of a fuel dispensing nozzle to prevent fuel vapors from escaping into the atmosphere, and a control apparatus is responsive to movement of the bellows to open the valve, and to removal of spout from the tank to close the valve.
Abstract: A fuel dispensing nozzle (10) has a body (12) in which a fuel passage is formed. A spout assembly (18) is attachable to the body in fluid communication therewith for fuel to flow from the body through the spout and into a tank (T). A valve (20) is interposed in the passage and controls fuel flow through the body. A flexible bellows (80) fits over the spout with the outer end (72) thereof sealingly engaging an inlet (I) of the tank to prevent fuel vapors from escaping into the atmosphere. A control apparatus is responsive to movement of the bellows when the spout is inserted into the tank to open the valve, and to removal of the spout from the tank to close the valve. An apparatus (176) is responsive to the vapor pressure within the tank to effect closing of the valve when an overpressure condition occurs thereby to prevent vapor from escaping into the atmosphere. The apparatus includes first and second pivotally connected levers (132, 136) one of which moves in response to movement of the bellows and the other of which moves in response to the vapor pressure reaching a predetermined level indicative of the tank being substantially full to close the valve and prevent vapors from escaping.

43 citations

Patent
01 Oct 1969
TL;DR: In this paper, a vacuum belt conveyor is provided comprising an endless belt or carrier formed of a plurality of hinged or linked together plate members and adapted to be driven by suitably powered sprocket wheels in engagement therewith.
Abstract: A vacuum belt conveyor is provided comprising an endless belt or carrier formed of a plurality of hinged or linked together plate members and adapted to be driven by suitably powered sprocket wheels in engagement therewith. Each plate member supports a vacuum or suction applying means including an outer cuplike member and an inner extensible bellows or flexible diaphragm member, the latter having a plunger rod and roller mechanism attached to its free end for actuation by a common cam track cooperatively engageable therewith. The cam track is operable to expand each bellows or diaphragm causing it to form a vacuum or suction plenum communicating with the outer cup member through a common aperture provided therebetween for such purpose. Thus, when a flat plate or object is placed on the endless carrier belt in airtight sealing engagement with a plurality of outer cup members and the bellows means associated with each outer cup member is actuated by the cam track means, a plurality of vacuum or suction forces are applied to the underside of the flat plate or object thereby firmly and securely holding it against the endless belt carrier for movement therewith. The cam track means is designed to actuate the bellows units at a predetermined location relative to the path of travel of the belt and to release the bellows units or deactuate them at a different predetermined location along the path of belt movement.

43 citations

Patent
21 Mar 2003
TL;DR: In this article, a pressure transducer that uses a rhomboidal flexure to provide displacement amplification to an optical sensing element is described. But the transducers can also be used to sense an absolute pressure and temperature compensation scheme, including the use of additional fiber Bragg gratings and thermal compensators axially positioned to counteract thermal effects of the optical sensor.
Abstract: A pressure transducer that uses a rhomboidal flexure to provide displacement amplification to an optical sensing element is disclosed The transducer includes an optical sensor disposed between sides of the flexure The top portion of the flexure connects to a displacement device, such as a bellows A first pressure port provides a first pressure to the bellows A second pressure, preferably greater than the first pressure, is ported into a housing containing the flexure, which tends to compress the bellows and pull apart or expand the flexure Such expansion pinches or compresses the optical sensing element between the sides of the flexure, and in particular stresses an optical sensing element containing a fiber Bragg grating Assessing the Bragg reflection wavelength of the grating allows the differential pressure to be determined, although the transducer can also be used to sense an absolute pressure A temperature compensation scheme, including the use of additional fiber Bragg gratings and thermal compensators axially positioned to counteract thermal effects of the optical sensing element, is also disclosed

43 citations

Patent
11 Jun 1997
TL;DR: In this article, the authors proposed a method to restrain dislocation of a mask by a body movement, and reduce gas leakage to the minimum extent by providing a bellows-shaped elastic body between a surface where the mask is brought into close contact with a face and a frame in which the mask was installed.
Abstract: PROBLEM TO BE SOLVED: To restrain dislocation of a mask by a body movement, and reduce gas leakage to the minimum extent by providing a bellows-shaped elastic body between a surface where the mask is brought into close contact with a face and a frame in which the mask is installed. SOLUTION: When a bellows-shaped elastic body 7 is placed between a frame 3 and a mask 1, a peripheral shape of bellows coincides with a peripheral shape of the mask to be connected, and the contour of a recessed line or a pointed line of the bellows exists on a plane. Silicone rubber or the like being a material of the mask is used as a material of the bellows-shaped elastic body, and when it is integrally molded with the mask, a manufacturing cost is reduced, and the easily installing merits are produced. The pitch number, a distance between pitches and a thickness of the bellows are decided by the magnitude of pressure of positive pressure gas to be used, the size of the mask, a dislocation quantity and a dislocation angle to be restrained and a material to be used or the like. A height of the bellows shaped elastic body 7 is set to 10 to 30 mm, and the pitch number is desirable to be 2 to 10 pieces. A thickness of the bellows is also desirable to be 1 to 3 mm.

43 citations


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