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7383736 |
Device and method for pressure indication
A device for indicating an internal pressure of an inflatable medical cuff, comprising: a membrane movable in response to a difference between the internal pressure and an external pressure; and...
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7322247 |
Gasket having a fiber-optic pressure sensor assembly
A sensor assembly includes a stainless steel tubular housing. Within the housing is a polyetheretherketone tube and a sensor. An optical fiber joins the sensor to a transmission cable and is...
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7302854 |
Method and apparatus for the detection of high pressure conditions in a vacuum-type electrical device
A method for detecting a high pressure condition within a high voltage vacuum device includes detecting the position of a movable structure such as a bellows or flexible diaphragm. The position at...
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7296473 |
Pressure sensor
A pressure sensor includes: an airtight case equipped with first and second pressure input orifices provided respectively on opposing first and second wall surfaces; a cylindrical first bellows...
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7197934 |
Pressure sensor with temperature compensated optical fiber
The present invention relates to a temperature-compensated optical fiber pressure detector for detecting pressure variations in at least one medium in relation to a reference medium such as the...
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7047816 |
Optical differential pressure transducer utilizing a bellows and flexure system
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...
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6962084 |
Sensor with molded sensor diaphragm cover
A diaphragm cover apparatus and method for a sensor are disclosed. A sensor cover is located proximate to a base. A dimple can be located centrally within the cover, wherein the dimple comprises a...
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6840111 |
Micromechanical component and pressure sensor having a component of this type
A micromechanical component in which lateral deformations, i.e., deformations of the component parallel to its two main surfaces, are concentrated in a defined area of the component structure,...
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6604427 |
Bellow-type pressure sensing apparatus
An Improved Bellow-Type Pressure Sensing Apparatus is disclosed. Also disclosed is, an apparatus that provides increased pressure sensitivity without added cost and complexity in the electronic...
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6543294 |
Sealed pressure indicator
A pressure indicator according to the present invention monitors the pressure of the fluid in a vessel. One embodiment of the present invention comprises a closed pressurized gas volume behind a...
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6425291 |
Relative-pressure sensor having a gas-filled bellows
A relative-pressure sensor is provided which is protected against contaminants and/or moisture and manages without an oil filling, having a gas-filled measuring chamber ( 5 ), which is sealed with...
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6382079 |
Vibration specific bellows assembly
An evacuated and hermetically sealed bellows assembly has a bellows core assembly for mechanical movement versus pressure differential requirements. Mechanical attachment means are secured to the...
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6182514 |
Pressure sensor for sealed containers
A magnetic pressure sensor for sensing a pressure change inside a sealed container. The sensor includes a sealed deformable vessel having a first end attachable to an interior surface of the sealed...
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6113553 |
Telemetric intracranial pressure monitoring system
The present invention relates to an apparatus for monitoring the intracranial pressure of a patient. The apparatus includes an implantable sensor implanted in the skull of a patient. The...
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5997484 |
Probe for measuring epidural pressure and elasticity of brain parenchyma
A probe for measuring epidural pressure and the elasticity of brain parenchyma includes first and second chambers both formed of a thin film with a bag-shape so that they can contract/expand in...
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5874680 |
Combination in-line pressure sensor and portable gauge head
A combination of an in-line pressure sensor and a portable gauge head are arranged such that they can be quickly connected and disconnected together and apart for giving a quick pressure reading of...
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5767412 |
Pneumatic pressure indicator
An athletic shoe (20) having an inflatable air bladder (52) integrated into the design and construction of the shoe, and apparatus (50) for inflating the air bladder, as well as apparatus (82) for...
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5542293 |
Pressure detecting apparatus for detecting vehicle tire air pressure
A pressure detecting apparatus for detecting vehicle tire air pressure. In a cylindrical housing mounted axially in parallel with a tire wheel, a setting magnet, a rotor magnet and a reversing...
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5535740 |
Disposable pressure gauge for resucitators
A disposable pressure gauge comprises a pair of bellows members, a returning member that tends to return the bellows members to a base-line position, and a housing member that contains the pair of...
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5531109 |
Indicator of the air pressure in the pneumatic tires of a vehicle based on a capacitive coupling
A device for monitoring tire air pressure in each one of the wheels of a vehicle at any time, and providing the driver of the vehicle with a warning signal in case the pressure in any one of the...
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5457999 |
Method and apparatus for measurement of forces and pressures using tensioned bellows
A method and apparatus for measuring differences between forces, pressures, and combinations thereof. One or more force or pressure deformable members, preferably metal bellows, are internally...
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5388462 |
Capacitance pressure transducer
A low pressure capacitance measurement device where capacitance base members are constructed from metal and one of the base members arranged to be torqued relative to the other base member where...
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5343753 |
Device for detecting a variation in a pressure being monitored by sensing displacement of a ball in a tube
A detector tube is supplied with air at an adjustable pressure balanced by at least two adjustable leak flow rates in the conduits 4 and 7 in order to adjust the position of ball in the tube. The...
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5337612 |
Apparatus for pressure transducer isolation
A transducer sensing element isolation assembly including a pressure housing having a chamber in which the sensing element is disposed, which sensing element communicates with the interior of a...
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5279161 |
Purge gas pressure monitoring system with temperature compensation
A temperature compensating device is provided for a purge gas pressure monitoring system in which a piezometer line has an outlet end for submerging in a medium to be monitored and an opposite end...
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5168757 |
Fluid displacement and pressurizing device
The present invention provides an improved pressurization device for use with angioplasty balloon catheters, or the like. The device has a novel quick release mechanism which enables rapid...
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5115675 |
Tensioned bellows pressure transducer
A tensioned bellows pressure transducer having a pressure chamber [40], an elastic vibrating member [50], an electromagnetic coil [60] a linkage [33], a rigid body [30], a body extension [35], and...
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5103670 |
Tire valve and pressure gauge
The combination tire valve and pressure gauge of the present invention is formed to be substantially the same size as current tire valve stems, such that it may be used as a replacement part...
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5087800 |
High frequency, large current, switch including a pressure-actuated current-carrying extensible bellows element
The invention concerns an on-off switch (1) for high-frequency currents. This switch (1) comprises a housing (2) made of an electrically non-conducting plastic and sealed at both its upper and its...
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5004873 |
Plural set point pressure responsive switching apparatus utilizing a single pressure sensing driver element
An actuator having a spring biased button abutting a first electric switch operator button and a flange spaced from an operator button of a second electric switch is driven by a pressure sensing...
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4980675 |
Temperature compensatible pressure monitor and sensor construction
By providing pressure-responsive switch-actuation means constructed for being substantially unaffected by temperature changes, a pressure sensor is attained which is capable of monitoring pressure...
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4938068 |
Pressure transducer
A pressure transducer 10 is disclosed wherein a bellows 11 is expanded by an external pressure applied at pressure port 16. The force created by external pressure applied to bellows 11 is...
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4911015 |
Non-electrical monitoring of a physical condition
A method for monitoring temperature or pressure by the steps of: providing a light path (30-42) having a light attenuating characteristic which is substantially independent of light wavelength, at...
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4836028 |
Pressure transducer
Small pressure transducer able to operate in wide temperature and pressure ranges, as well as in aggressive environmental conditions, i.e. corrosive, radioactive or vibratory conditions. It...
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4793177 |
Combination tire valve and pressure gauge
A tire valve having a pressure gauge disposed therewithin. The pressure gauge mechanism includes a bellows that is mechanically connected through worm gears to a rotary drum tire pressure...
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4709063 |
Preparation of 2-halo-5-methylpyridines from 4-methyl-4-pentene derivatives
A method of preparing certain 2-halo-5-methylpyridines, useful as herbicide intermediates, is presented starting from acyclic pentenes. The pentene is difunctionalized, e.g., by making the epoxide,...
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4665747 |
Flight instrument using light interference for pressure sensing
Aircraft instrument for indicating air pressure, air pressure rate of change and accelerations of the aircraft movement based on the use of an optical laser interferometer. The air pressure is...
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4633213 |
Pressure temperature sensor
A pressure-temperature sensor for monitoring a fluid system for an over-temperature, an under-pressure or an over-pressure condition. The sensor includes a bellows operator enclosed in a...
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4530496 |
Device for exercise and/or therapy
A device and system for the purpose of exercise and/or physical therapy through use of a primary vessel of pliable plastic material that forms a hollow main body portion at least partially filled...
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4484473 |
Monitoring and signalling tape head apparatus
Monitoring and signaling device having at least one tape for indicating a measurement value of a measuring unit and for actuating a signal transmitter, the tape having a section thereof stretched...
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4445382 |
Differential pressure-responsive device
A differential pressure-responsive apparatus is disclosed which includes a primary base plate member, a cover member removably attached to the primary base plate and thereby forming a normally...
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4406966 |
Isolating and temperature compensating system for resonators
A mounting structure for crystal resonators used as frequency standards and transducers which maximizes performance and reduces the sensitivity to environmental errors. In one embodiment, force...
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4393715 |
Absolute pressure pick-up, especially for measuring pressure at intake in internal combustion engines
Disclosed is an absolute pressure pick-up for the intake in an internal combustion engine. The pick-up consists of a screened magnetic circuit equipped with a mobile core placed inside an elastic...
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4393714 |
Differential pressure sensor
A differential pressure sensor comprises a housing having first and second inlets; a rod-shaped capacitive displacement sensor affixed to the housing in the interior thereof; a first electrode...
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4378751 |
Condition indicating device for a puffer type load break switch
An easily visible condition indicating device to signify a lack of pressure within the envelope of an electrical interrupter of the type utilizing a pressurized-gas environment. The system includes...
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4354506 |
Intracranial pressure gauge
The present disclosure is directed to an intracranial pressure gauge which comprises a powerless resonance circuit composed of a coil and a condenser; a sensor equipped with a pressure-sensitive...
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4336819 |
Pneumatic converter
A pneumatic converter comprising a bellows having in its interior a coupling plate connecting the two ends of the bellows together at a position offset from the center axis of the bellows.
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4320652 |
Intake air density sensor for an internal combustion engine
An intake air density sensor for an internal combustion engine comprises a receptacle in the form of a flask including a spherical chamber and a tubular portion having a very fine diameter, a...
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4317361 |
Gas density detecting device for use in internal combustion engine
A gas density detecting device for use in an internal combustion engine is disclosed. The device comprises a bellows having a selected gas sealed therein, a guide mechanism provided in the bellows...
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4276776 |
Temperature/pressure transducer
A temperature or pressure gauge capable of providing a magnified output indication of a respective sensed temperature or pressure of a fluid. Overlapping surfaces are movable relative to one...
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