Class 338/39 - Piston

Subclass of Class 338 - Electrical resistors
Definition: Subject matter wherein the resistor actuator is a piston
No. of patents: 23
Last issue date: 10/07/2008

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Number	Title	Issue Date
7432795	Pressure sensor header having an integrated isolation diaphragm A pressure sensor header for a pressure transducer includes a header shell having a sensor cavity formed therein, a sensor element disposed in the sensor cavity, a fluid medium disposed in the sensor cavity, an isolation diaphragm closing the sensor cavity, and a jo...	10/07/2008
7369032	Method of joining a pressure sensor header with an associated transducer element A pressure transducer assembly including: a pressure sensor header; a transducer assembly member; and a joining arrangement disposed at an interface of the header and the transducer assembly member, for joining the header with the transducer assembly member, the joi...	05/06/2008
7247814	System and method for data communications over a gas hose in a welding-type application The present invention includes a system and method of controlling a remotely located welding-type power source. A communications system includes a user interface to accept a user input at a portable location and a gas purging device to systematically purge pressuriz...	07/24/2007
7124607	Two piece swivel assembly for handcuff The handcuff assembly includes a bow pivotally connected to a cheek plate frame assembly which includes a unitized frame that is die stamped from a metal plate and which is overmolded with a polymer overmold. The unitized frame has interlocking tabs on folded side p...	10/24/2006
7077008	Differential pressure measurement using backside sensing and a single ASIC Differential pressure sensor systems and methods are disclosed, including an absolute pressure sensor composed of a plurality of pressure sense die for detecting sensed media, wherein each of the pressure sense die possess a back side and a front side and are respec...	07/18/2006
7073375	Exhaust back pressure sensor using absolute micromachined pressure sense die Sensor systems and methods are disclosed, which generally incorporate isolation between the sensor's electronics and the sensed media. The sensor's electronic circuit can incorporate one or more application specific integrated circuit (ASIC) that processes and outpu...	07/11/2006
6945120	Exhaust gas recirculation system using absolute micromachined pressure sense die An absolute pressure sensor is disclosed that includes a plurality of pressure sense die and a hermetically sealed cover located above the plurality of pressure sense die. A carrier can be provided to which the pressure sense die are mounted by a cured adhesive. The...	09/20/2005
6886929	Techniques for improving pressure sensor shock robustness in fluid containment devices Techniques are disclosed for improving pressure sensor shock robustness in fluid containment devices by providing a mechanical filter configured to prevent high-frequency pressure shocks from damaging the pressure sensor. One approach includes a body of elastomeric ...	05/03/2005
6016097	Motion transducer A motion transducer having a user moveable plunger which compresses a spring for generating a force proportional to plunger displacement and applying the generated force to an actuator telescoped onto the plunger. The actuator has an elastomeric pad on th...	01/18/2000
5644285	Pressure transducer with media isolation A pressure sensor die is provided with a flexible membrane and a plunger which combine to amplify a low pressure signal while also providing media isolation between a fluid being measured and the internal components of a pressure sensor. One embodiment of...	07/01/1997
5162775	Variable resistor utilizing extension type conductive rubber A variable resistor that utilizes, as its resistive component, an extension type conductive elastomer such as a conductive silicone rubber cross-linked and then impregnated with a silicone oil, that will experience a change in electrical resistance respon...	11/10/1992
5144275	Positioning cylinder, especially for subterranean mining A positioning cylinder assembly for subterranean mining applications has a rotary potentiometer connected through a friction wheel transmission with the spindle of the cylinder which is rotated when the piston is axially displaced therein. The friction wh...	09/01/1992
5004996	Hydraulic actuating apparatus A hydraulic actuating apparatus for sensing hydraulic pressure and producing an output signal representative of the sensed hydraulic pressure includes a base portion, a case, and a variable resistor unit. A slider is movably connected to the variable resi...	04/02/1991
4805460	Oil pressure transducer A pressure transducer to measure and indicate fluid pressure levels including a housing in which a diaphragm and piston assembly is movable in response to pressure changes, the piston having a portion extending therefrom to engage a switch contact thereby...	02/21/1989
4728920	Pressure transducer A fluid pressure transducer having a hollow enclosure with an elongated tubular guide supported therein around which a tubular piston moves in response to fluid pressure forces acting on one piston end. A spirally-wound wire resistance coil on the guide i...	03/01/1988
4525698	Pneumatic switch potentiometer A pneumatically actuated pressure transducer has a wiper assembly which is movable from an off position through a range of positions wherein the transducer has a varying voltage output. The pressure transducer comprises a high thermal conductivity substra...	06/25/1985
4484173	Pressure transducer device using Hall elements A control device and method of making the same are provided, the control device having a housing provided with an actuator chamber separated from a pressure differential chamber by a wall having an opening therethrough receiving an axially movable actuato...	11/20/1984
4449112	Oil pressure sender with rolling diaphragm This pressure sender or transducer comprises a metal housing having a steel cover and containing a rolling diaphragm which is secured over a cavity in the housing to communicate at one side with fluid under pressure, such as the oil in the crankcase of an...	05/15/1984
4449113	Oil pressure sender with friction free resistor device The housing has a flexible diaphragm secured over a fluid pressure inlet port in one end thereof, and a cover secured over an opening in the opposite end thereof. A plunger is mounted to reciprocate in the housing between said diaphragm and said cover in ...	05/15/1984
4365406	Pressure transducer and method of making same A hydraulic pressure transducer comprises a cylindrical housing having a plurality of circumferential inwardly and outwardly directed ribs which axially position and retain coaxially aligned operative components within the transducer. These components inc...	12/28/1982
4334131	Multi-stage pressure switch A multi-stage pressure switch (10) transduces partial vacuum pressure levels to corresponding electrical outputs. The switch (10) comprises a vacuum housing (12) having a bore (16) therein and a port (14) at one end. Positioned within the bore (16) and in...	06/08/1982
4279162	Pressure transducer A hydraulic pressure transducer comprises a cylindrical housing having a plurality of circumferential inwardly and outwardly directed ribs which axially position and retain coaxially aligned operative components within the transducer. These components inc...	07/21/1981
4061034	Fluid pressure sensing device A device operable in response to an input fluid force includes a housing having an inner surface and a fluid pressure responsive member carried within the housing and having a surface that abuts the inner surface of the housing. The surfaces are curved an...	12/06/1977

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Class 338/39 - Piston