Patent
Absolute pressure transducer
TLDR
In this article, an absolute pressure transducer including an open bellows, a suspension system, and a sealed bellows is described, which can yield a torque about a single sensitive axis when pressure is applied.Abstract:
Disclosed is an absolute pressure transducer including a mechanical assembly comprising an open bellows, a suspension system, and a sealed bellows arranged to yield a torque about a single sensitive axis when pressure is applied to the open bellows and an electronic circuit comprising a detector for sensing angular motion and a torquing device to restore the mechanical assembly toward its null position. The amount of electrically generated torque necessary to balance the pressure induced torque is proportional to, and a measure of, the applied pressure.read more
Citations
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Patent
Dual balanced capacitance manometers for suppressing vibration effects
TL;DR: In this article, the capacitance manometers are positioned about a common axis around a common pressure chamber that receives the unknown pressure so that the flexible diaphragms of each of the manometers simultaneously deform either outwardly or inwardly from the common pressure chambers in response to changes in pressure.
Patent
Capacitance manometer having a relatively thick flush diaphragm under tension to provide low hysteresis
TL;DR: A capacitance diaphragm gauge (100) for measuring pressure is used in this article, as well as flush diaphrasm (120) mounted to a body structure via a shim (122) or other raised perimeter portion.
Patent
Force balancing capacitance manometer
TL;DR: An apparatus for measuring the differential pressure between at least two fluids including (a) first and second pressure enclosures, (b) a position sensing device for determining the displacement of the pressure deformable members relative to the frame, and (c) a force balancing device including a first portion rigidly connected to a frame and a moveable second portion connected to the pressure deformed members.
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TL;DR: In this article, a valve assembly having a thermal valve member and a priority valve member that are shiftable to first and second positions in response to a temperature and pressure of a fluid flowing through the valve assembly is presented.
Patent
Torque output differential pressure sensor
TL;DR: In this article, a diaphragm displacement induced by the pressure differential between two pressure zones is converted to a torsional strain upon a cylindrical element in a third environmental zone.
References
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Patent
Servo pressure transducer
TL;DR: In this paper, a servo- or force-balance-type pressure transducer incorporating as the sensing element a bending beam comprising at least one bellows having a flat, flexible metal strip along one side.