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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
25 Feb 1980
TL;DR: In this paper, an improved implantable infusion device for delivering precisely regulated doses of fluid into the body of a patient was presented. The device utilizes a resilient noncompliant pump bellows (13) that is directly coupled by a gear train (15, 17, 19, 21) to a motor (23).
Abstract: An improved implantable infusion device for delivering precisely regulated doses of fluid into the body of a patient. The device utilizes a resilient non-compliant pump bellows (13) that is directly coupled by a gear train (15, 17, 19, 21) to a motor (23). The bellows (13) is biased toward the expanded position and this factor, combined with the mechanical inertia of the gear train (15, 17, 19, 21) substantially eliminates the danger of an overdose of infusate being released into the patient.

561 citations

Patent
18 Nov 1982
TL;DR: In this paper, a suction drainage device is disclosed which comprises a receptacle communicated with a body cavity via an inlet tube, which can be formed as a bellows, flat receptacle, foil or sheet bag, or a flexible check valve inside the receptacle.
Abstract: A suction drainage device is disclosed which comprises a receptacle communicated with a body cavity via an inlet tube. The receptacle is formed as a bellows, flat receptacle, foil or sheet bag, or foil or sheet tube and the like which can be folded or rolled up. A flexible check valve in the form of a foil or sheet valve, or flutter valve, is disposed inside the receptacle. The inlet tube is provided on a side of one edge of the receptacle so that the receptacle can be rolled up over a long roll path without interference from the valve. The device can be manufactured at low cost.

464 citations

Patent
16 Sep 1974
TL;DR: In this article, a surgically implantable pressure transducer for measuring pressure of fluid or tissue in a body chamber such as brain ventricle of a patient suffering hydrocephalus or a severe head injury is described.
Abstract: A wireless, surgically implantable pressure transducer for measuring pressure of fluid or tissue in a body chamber such as brain ventricle of a patient suffering hydrocephalus or a severe head injury. The transducer includes a coaxial variable capacitor electrically connected across an inductor to form a parallel resonant L-C circuit. Alternatively, a coaxially variable inductor may be connected across a capacitor to form the L-C circuit. A bellows is mechanically connected to the variable component to vary the value of capacitance or inductance and hence the resonant frequency of the L-C circuit in response to pressure changes of the fluid in which the bellows is immersed. The transducer is electromagnetically coupled to an external source of variable-frequency oscillatory energy such as a grid-dip oscillator which enables external detection of the transducer resonant frequency which is in turn indicative of the level of fluid pressure being sensed.

284 citations

Proceedings ArticleDOI
13 Nov 1994
TL;DR: This work shows how the virtual bellows, which implements the projective group, is an exact model fit to both pan and tilt, and identifies two important classes of image sequences accommodated by thevirtual bellows.
Abstract: Cameras with bellows give photographers flexibility for controlling perspective, but once the picture is taken, its perspective is set. We introduce 'virtual bellows' to provide control over perspective after a picture has been taken. Virtual bellows can be used to align images taken from different viewpoints, an important initial step in applications such as creating a high-resolution still image from video. We show how the virtual bellows, which implements the projective group, is an exact model fit to both pan and tilt. Specifically, we identify two important classes of image sequences accommodated by the virtual bellows. Examples of constructing high-quality stills are shown for the two cases: multiple frames taken of a flat object, and multiple frames taken from a fixed point. >

245 citations

Patent
13 Oct 2006
TL;DR: In this article, a surgical apparatus for performing endoscopic or laparoscopic surgical procedures is described, which includes a frame and a bellows seal, which expands outwardly upon advancement of a clamp member of the clamping mechanism.
Abstract: A surgical apparatus for performing endoscopic or laparoscopic surgical procedures is disclosed. The apparatus includes a frame and a bellows seal which provides a seal between the frame and a clamping mechanism and the frame and a firing mechanism. The bellows seal is positioned within the frame such that the bellows seal expands outwardly upon advancement of a clamp member of the clamping mechanism to provide a seal within the frame or to increase the capacity of the seal within the frame.

237 citations


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