Class 73/862.584 - Using a piston

Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the fluid pressure being sensed affects
No. of patents: 31
Last issue date: 03/27/2007

Number	Title	Issue Date
7194915	Lever connector test fixture A universally adjustable tool for measuring the force required to throw the lever of a lever-type, two-part, electrical connector. The tool comprises a handle, a base bar to which the handle is slideably attached, and a pair of legs having adaptors to permit the too...	03/27/2007
7146843	Extreme low air pressure deadweight tester The present invention relates to Deadweight Pressure Testers used for the calibration of air pressure transducers. An air pressure transducer, which is to be calibrated, is set in parallel with the deadweight tester. Air is slowly pumped into the cylinder and the pr...	12/12/2006
7084759	Drop detection device A drop detection device having a spherical inertia member disposed within an enclosure. The enclosure has multiple faces, preferably six faces oriented orthogonally, with each face having a pressure contact member. The exertion of a predetermined force by the spheri...	08/01/2006
7005587	Load cell including angular and lateral decoupling A load cell includes a first element, a second element and a sensor measuring force between the first and second elements along a first axis. In some embodiments, lateral and angular decoupling is provided by the provision of a convex surface between the first and s...	02/28/2006
6971273	Tool evaluation system and method A tool is evaluated in response to a member of the tool being moved from a first position to a second position. In this evaluation, a first force is applied to the member. The first force is operable to move the member from the first position to the second position....	12/06/2005
6948386	Shock resistant strain gage—seat mounted An over-travel protection device is provided for placing in a load path between a load cell and an object being weighed. The device has a first member positioned to be in the load path and a second member also positioned to be in the load path. The second member is ...	09/27/2005
6820896	Seat occupant weight sensing system A seat occupant weight sensing system includes load cells that receive the weight of a seat occupant. A microprocessor receives indication of force applied to the load cells and may also receive output from a seat belt tension sensor and/or an atmospheric pressure s...	11/23/2004
6364352	Seat occupant weight sensing system A system for determining the weight of the occupant of a vehicle seat includes a hinge near the forward edge of the seat and a force sensor responsive to downward force at a point well to the rear of the hinge thereby indicating torque about the hinge. Th...	04/02/2002
5760313	Force sensor with multiple piece actuation system A force sensor is provided with a two piece actuation system. A first actuator is disposed in contact with the pressure sensitive component and a second actuator is disposed in contact with the first actuator. When an external force is exerted against a d...	06/02/1998
5271283	Ballistic impulse gauge A gauge for detecting the impulse generated in sample materials by X-rays or other impulse producing mechanisms utilizes a pair of flat annular springs to support a plunger relative to a housing which may itself be supported by a pair of flat annular spri...	12/21/1993
5251493	Load cell for well tubulars or the like Methods and apparatuses, in one aspect, for detecting and indicating loads and/or forces on tubular strings, e.g. tubing, injected into or withdrawn out of a well by an injector apparatus, the apparatus having, in one embodiment, a single piston acting on...	10/12/1993
5045830	Hydraulic actuating apparatus A hydraulic actuating apparatus includes a cylindrical case having a fitting at one end connectable to a source of pressurized oil, the fitting having a passage for communication with the pressurized oil, a slider slidably carried by the cylindrical case,...	09/03/1991
4842058	Load detection and indicator apparatus for well tubing or the like A load cell apparatus especially suitable for detecting and indicating loads on tubing injected into or withdrawn out of a well with an injector apparatus. The load cell apparatus is located longitudinally directly below the injector apparatus to avoid an...	06/27/1989
4798094	Hydrostatic primary force standard A controlled clearance piston load cell consisting of a piston and pressure acketed cylinder that has integral to its structure a system of hydrostatic bearings which provide centering of the piston in the cylinder and alignment of the piston-to-cylinder i...	01/17/1989
4793410	Load detection and indicator apparatus for well tubing or the like A load cell apparatus especially suitable for detecting and indicating loads on tubing injected into or withdrawn out of a well with an injector apparatus. The load cell apparatus is located longitudinally directly below the injector apparatus to avoid an...	12/27/1988
4569407	Portable hydraulic scale A weighing apparatus which eliminates knife edges, levers and linkages comprising a plurality of load bearing fluid cylinders supported by a base, a weighing platform supported by the load bearing cylinders. A plurality of secondary cylinders, hydraulical...	02/11/1986
4558599	Bolt demonstrator A device for measuring the clamping force of a nut and bolt assembly is disclosed. The device includes a pair of adjacent, parallel metal plates each having a passage therethrough, which are in axial alignment with each other. Positioned between the plate...	12/17/1985
4546657	Force gauge A device for measuring forces exerted by the jaws of a chuck under both static and dynamic rotary conditions is characterized by an elongate housing and a piston in a cylinder bore in the housing and extending generally perpendicular thereto. The piston a...	10/15/1985
4309896	Pick-up for measuring forces or weight loads The pick-up is characterised in that it comprises a body which is flexible in its length and fixed in its cross-section and which is disposed between a plate for receiving the applied force and a support plate, the said body containing a liquid which conv...	01/12/1982
4258566	Load indicating apparatus having a hydraulic sensing unit and coupling pin type electronic sensing unit Load indicating apparatus in which a hydraulic load sensing unit is pivotally connected by coupling pins respectively with opposed members capable of relative movements under applied load forces, one of the coupling pins comprising an electronic load sens...	03/31/1981
4222491	Crane operating aid and sensor arrangement therefor A crane operating aid comprises a load moment computer and a number of transducers which monitor crane parameters such as boom length, boom angle, and boom reaction forces. The computer then calculates the percentage of load capacity as a function of the ...	09/16/1980
4211110	Method and apparatus for certifying the output torque curve of a hydraulic hoist for use in dump body applications Disclosed herein is a method and test apparatus for use in determining and certifying hoist compliance with one of several minimum body and payload torque requirement curves, which curves establish torque classifications for hydraulic hoists suitable for ...	07/08/1980
4201081	Pressure responsive sensing device A pressure responsive sensing device includes a housing defining a chamber. The chamber is filled with a non-compressible fluid and is closed at one end by a diaphragm. The diaphragm is retained in position by a cover plate. A stem connected to the outsid...	05/06/1980
4198857	Measuring system A system for measuring the force exerted on two or more hydraulic jacks, each carrying the same load. The system comprises for at least each of the main chambers of the jacks, a sensor to measure the pressure of the hydraulic fluid and a calculation membe...	04/22/1980
4162629	Tensive force load cell assembly A load cell assembly is provided utilizing a hydraulic load cell in combination with an electric load cell to eliminate undesired side loading and to provide two separate output signals indicative of a tensive load....	07/31/1979
4161117	Hydraulic-electronic load sensing device for load indicating apparatus A load sensing device for connection in load indicating apparatus between a pair of spaced members arranged to move apart under applied load tension forces, the load sensing device having a hydraulic load cell and an electronic load cell mechanically moun...	07/17/1979
4133206	Thrusting force detecting device of a rotary machining tool A thrusting force detecting device of a rotary machining tool includes a cylinder chamber formed within a ram for lowering and elevating a spindle of a cutting tool, a fluid chamber formed within the cylinder chamber and having a larger diameter than the ...	01/09/1979
4050300	Torque indicating assembly A torque indicator assembly and more particularly an improved torque indicator assembly offering multiple use applications and improved long range consistency and operational characteristics....	09/27/1977
3999427	Hydraulic-electronic load sensing unit for load indicating apparatus A load sensing unit for load indicating apparatus, the sensing unit comprising a hydraulic load cell and an electronic load cell connected in stacked relation between opposed members of the apparatus capable of relative movements under applied load forces...	12/28/1976
3942368	Portable pull testing unit for installed earth anchors A lightweight, compact, portable pull-testing device is disclosed which is especially adapted for testing the load capabilities of installed, relatively small earth anchors such as those utilized with hold-down equipment for mobile homes or the like. The ...	03/09/1976
3938380	Hydraulic load sensing device A hydraulic load-sensing device disposed between a load carrying device in the form of a lifting hook and a hoist in the form of a crane jib includes a single-acting hydraulic piston and cylinder unit, the cylinder component being connected to the hoist j...	02/17/1976

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Class 73/862.584 - Using a piston