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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
16 Feb 2001
TL;DR: In this article, the conditions of a pressure-balanced expansion joint are monitored by a flow control valve that is movable between at least an "off" or "no-flow" position and a flow permitting position.
Abstract: A method and apparatus for monitoring a pipeline expansion joint, in particular the conditions of a pressure-balanced expansion joint. A sensor is positioned so as to sense one or more physical characteristics of a pipeline fluid flow. A signal generated by the sensor(s) is received by a suitably configured electronic controller. The controller, in turn, is connected to a flow control valve, that is movable between at least an “off” or “no-flow” position, and a flow permitting position, connecting a source of compressible medium and the volume confined between the two (or more) balancing bellows of a pressure-balanced expansion joint. An accumulator may also be provided, that may be connectable via the flow control valve, to the confined volume. The controller will be operably configured to cause the valve to be moved, in response to signals received from the sensor(s) that correspond to stored numerical data in the controller that represent different potential operating conditions. In an alternative embodiment, the controller may also be suitably connected to various external communication devices, for communication of a signal representative of, e.g., a failure condition, to a predesignated recipient.

16 citations

Patent
29 Jul 1986
TL;DR: A bellows-form boot for universal joint which is formed integrally of a le-diameter cylindrical portion and a small diameter cylinrical portion at both ends, the former being adapted to be fitted to a joint case housing therein the universal joint and the latter to a driving shaft is described in this paper.
Abstract: A bellows-form boot for universal joint which is formed integrally of a le-diameter cylindrical portion and a small-diameter cylindrical portion at both ends, the former being adapted to be fitted to a joint case housing therein the universal joint and the latter to a driving shaft, a central annular bellows portion having ridge portions whose diameters are tapered down toward the small-diameter portion, and a bracing boss portion extending between the large-diameter portion and the bellows portion. The boss portion has a wall thickness of 2 to 3 times the average wall thickness of the bellows portion and is profiled so that the inner face thereof may abuttingly contact with the edge face of the joint case and the outer face thereof is flush with the outer face of the bellows portion in the mutual joining area. The bellows portion has, at its zone adjacent to the boss portion extending from the end to the crest of the first ridge portion thereof, wall thicknesses gradually increasing from the latter to the former, whose maximum is a half the wall thickness of the boss portion.

16 citations

Patent
13 Mar 2003
TL;DR: In this paper, a pump unit and a container capable of preventing liquid from flowing out when not in use during transportation and also preventing an operability from being lowered by the contraction of a bellows over a long period of time are presented.
Abstract: A pump unit and a container capable of preventing liquid from flowing out when not in use during transportation and also preventing an operability from being lowered by the contraction of a bellows over a long period of time, the pump unit inserted into a container body (Y) to suck the liquid in the container body (Y) to the outside thereof comprising a suction pipe (63) inserted into the container body (Y), the bellows-like bellows (64) connected to the upper part of the suction pipe (63) and returnable in the direction of extension, and a piston part connected to the upper part of the bellows (64) to extend and retract the bellows (64) and sucking the liquid in the container body (Y) from a piston head (P) to the outside of the container body (Y) through the suction pipe (63), wherein the piston part is formed extendable so that the piston head (P) can be stored in the container body (Y) without retracting the bellows (64).

16 citations

Patent
01 Jul 1981
TL;DR: A filling device for cartons comprises a row of vertical ducts arranged along a path of the cartons as discussed by the authors, each duct includes, progressing downwardly, an upper bellows, a ducting section incorporating an inlet valve, a lower bellows and a fixed nozzle incorporating an outlet valve.
Abstract: A filling device for cartons comprises a row of vertical ducts arranged along a path of the cartons. Each duct includes, progressing downwardly, an upper bellows, a ducting section incorporating an inlet valve, a lower bellows, and a fixed nozzle incorporating an outlet valve. The section is vertically reciprocated by a ram. The nozzle comprises a tubular housing containing a valve member comprising a closure part co-operating with a valve seat at the lower extremity of the housing, a stem, and a driving part of inverted cup shape fixedly received with clearance on the stem and movably received with clearance in the housing.

16 citations

Patent
02 Apr 1984
TL;DR: In this article, a rigid coaxial transmission line with axially spaced sections is considered, and a rigid auxiliary connecting member is disposed within the bellows and is slidably connected to one of the conductor sections.
Abstract: A rigid coaxial transmission line in which the inner conductor is formed by axially spaced sections. Adjacent sections are connected by a conductive bellows which permits thermal expansion and contraction of the inner conductor sections relative to one another and relative to the outer conductor of the transmission line. A rigid auxiliary connecting member is disposed within the bellows and is slidably connected to one of the conductor sections. The auxiliary connecting member limits expansion and contraction of the bellows to a safe range to prevent the bellows from being overstressed.

16 citations


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