| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073744000 | Piston | 14 |
| 20090151465 | Miniature high pressure cell for sample characterization - A miniature high pressure cell for sample characterization under pressure, comprising: a cell body defining a bore extending along an axis; first and second force transmitting elements mounted within said bore, said first and second force transmitting elements having respective first and second force transmitting faces which face towards each other in the axial direction; and a seal member positioned at least partially in said bore between said force transmitting elements, the seal member having walls defining a through-hole extending axially between respective sides and opening out towards respective force transmitting faces, said seal member and force transmitting elements being arranged such that, in use, the walls of said seal member defining said through-hole and portions of said force transmitting faces define the boundaries of a sealed sample volume in which a pressure transmitting medium and a sample to be characterized may be contained, wherein: at least one of said force transmitting elements is moveable so as to press said seal member between the faces; the miniature high pressure cell further comprising: a force locking apparatus for holding said force transmitting elements pressed against said seal member with a predetermined locking force, such that said sealed sample volume is held pressurized by said predetermined locking force; wherein said cell body includes a threaded portion and said force locking apparatus comprises at least one locking member with a threaded portion configured to cooperate with the threaded portion of said cell body, said threaded portions being coaxial with the axis of said bore and axially spaced from said seal member. | 06-18-2009 |
| 20090211364 | Cell for testing fluids at elevated pressures - An apparatus for a burst safe pressure-neutral high pressure cylinder in pVT and condensate cells is described. The dimensions of an outer cylinder are such as to prevent plastic flow of the inner cylinder wall caused by elevated inside pressure and/or temperature. | 08-27-2009 |
| 20090288494 | Device For Measuring Pressure - A device for measuring pressure in a fluid line, with a fluid chamber, which is connected with the fluid line so as to allow flowthrough, and with a transducer, characterized in that the fluid chamber includes an opening to a branch line and in the branch line of the fluid chamber at least one end of a transmission element is inserted. The transmission element forms a power-locking connection between the fluid chamber and the transducer and the transmission element is suited for transmitting the fluid pressure to the transducer. This device proves to be especially precise and is easily sterilized. | 11-26-2009 |
| 20100071473 | INTERNAL PRESSUR SENSOR - A pressure sensor for sensing changes in pressure in an enclosed vessel may include a first chamber having at least one expandable section therein that allows that first chamber to change in length. A reference member mounted within the first chamber moves as a result of changes in length of the first chamber. A second chamber having an expandable section therein allows the second chamber to change in length in response to changes in pressure in the enclosed vessel. The second chamber is operatively associated with the first chamber so that changes in length of the second chamber result in changes in length of the first chamber. A sensor operatively associated with the reference member detects changes in position of the reference member. Changes in position of the reference member are related to changes in pressure in the enclosed vessel. | 03-25-2010 |
| 20120036937 | ELECTRONIC READOUT FOR PISTON-TYPE DIFFERENTIAL PRESSURE GAUGE - A piston-type differential pressure gauge provides an electronic output for remote monitoring. A linear potentiometer, in communication with a magnetic portion of the piston of the gauge, tracks the location of the piston. Resistance change in the potentiometer can be used by an electronic circuit to provide the electronic output of the differential pressure remotely to a data acquisition system or control electronics. | 02-16-2012 |
| 20120144922 | PISTON-CHAMBER COMBINATION - A piston chamber combination comprising a container type piston, communicating with an enclosed space, said enclosed space having an at least substantially constant volume. | 06-14-2012 |
| 20120186355 | AIR PUMP PRESSURE GAUGE - An air pump pressure gauge includes a casing, an inner tube coaxially affixed to the casing and defining with the casing an accommodation chamber, a movable member movable back and forth in the accommodation chamber, an end cap end cap set between the inner tube and the casing to seal one end of the accommodation space, a spring member stopped between the end cap and the movable member, at least one seal member mounted on the movable member to define a first airtight structure between the outer surface of the inner tube and the at least one seal member and a second airtight structure between the inside wall of the casing and the at least one seal member, an air hole in communication between the axial hole of the inner tube and the accommodation space, a longitudinal sliding slot located on the movable member, a rack extending along one side of the longitudinal sliding slot, a rotating axle inserted through the longitudinal sliding slot and having its inner end pivoted to the inner tube and its outer end extending out of the casing and a middle part thereof mounted with a gear being meshed with the rack, a pointer fixedly connected to the outer end of the rotating axle outside the casing, a graduation scale mounted on the casing below the pointer, and a transparent cover covering the graduation scale and the pointer. | 07-26-2012 |
| 20130047739 | DEVICE FOR DETERMINING AN OPERATING STATE OF AT LEAST ONE BIDIRECTIONALLY ACTUABLE HYDRAULIC ADJUSTING DEVICE OF A SHIFTING ELEMENT OF A TRANSMISSION DEVICE - A device for determining an operating state of a bi-directionally actuated hydraulic adjusting device of a transmission shifting element, which pressurizes active surfaces of a piston. The piston is biased to opposite end positions depending on which of a first active surface or a second active surface is pressurized with high pressure. The areas of the adjusting device, which can be pressurized with the pressure at the active surfaces of the piston, are connected with one another in positions of the piston element, between the end positions, via a throttle device. One of each area can be coupled for adjustment of the piston with the high-pressure area, and the other area with the low pressure area. An additional throttle device is provided upstream of the low pressure area and a pressure measuring device is provided upstream of the additional throttle device. | 02-28-2013 |
| 20130098161 | Manometer with a Pressure Transforming Device - A manometer includes a pressure gauge, a cylinder having a larger cross-section and an outlet, and a tubular coupler fluidly communicated with the cylinder and having a source-side port. A piston is fitted in and fluid-tightly slidable relative to the cylinder to define a fluid subchamber in communication with the outlet. A piston rod having a smaller cross-section extends from the piston into the tubular coupler to terminate at a pressed end. The outlet and the source-side port are fluidly communicated with the pressure gauge and a pressure source to be measured so as to transform an internal pressure of the pressure source into a reduced or augmented fluid pressure to be detected by the pressure gauge. | 04-25-2013 |
| 20130305832 | HIGH PRESSURE VISUAL INDICATOR - A fluid-pressure indicator is provided and may include a housing having a first region and a second region. A pressure-responsive member may be disposed in the first region and may be movable between an expanded state and a compressed state. An indicator disk may be viewable through the pressure-responsive member when the pressure-responsive member is in the compressed state and may be obscured from view through the pressure-responsive member when the pressure-responsive member is in the expanded state. A diaphragm may be movable from a relaxed state to a deflected state in response to pressure within the second region exceeding a threshold pressure and may prevent fluid communication between the first region and the second region. The diaphragm may additionally cause the pressure-responsive member to move from the expanded state to the compressed state when the pressure exceeds the threshold pressure. | 11-21-2013 |
| 20160041052 | System And Method For Analysing Vapour Pressure - An apparatus for measuring the vapour pressure of a liquid hydrocarbon sample is disclosed. The apparatus comprises a sealed chamber ( | 02-11-2016 |
| 20160076957 | PRESSURE INDICATOR WITH PRESSURE-RELIEF FUNCTION - A pressure indicator with a pressure-relief function is disclosed, which can release excessive pressure to the environment. The pressure indicator includes a transparent tube defining therein a first bore and a second bore, and a slider which can be forced by the medium supplied from an external pressure source to move along the first and second bores of the transparent tube. In particular, the first bore has a diameter greater than the second bore, and a tapered annular surface is provided between the first bore and the second bore of the transparent tube. When the pressure of the medium exceeds a predetermined pressure, the slider can be forced by the medium to reach the tapered annular surface, at which excessive medium can be released into the environment via an annular gap between the slider and the tapered annular surface. | 03-17-2016 |
| 073745000 | With electrical readout | 2 |
| 20120152027 | Sensitive Differential Pressure Sensor and Method - A differential pressure sensor has a magnetized piston free to move in a cylinder. Magnetic endcaps seal the ends of the cylinder, forming chambers on either side of the piston. The moveable magnetic piston is constrained by the opposing magnetic fields of the endcaps. The piston is covered with magnetic ferrofluid, providing a low friction gas-tight seal around the piston. The cylinder has two pressure input lines, one being connected to the chamber on either side of the piston. The relative pressures of the input lines cause the piston to move to a position of equilibrium within the cylinder, with the magnetic fields of the endcaps holding the piston in place against the pressure. A magnetic field angle sensor detects flux lines on the outside of the cylinder, and the reading is correlated with the pressure differential between the two input lines. | 06-21-2012 |
| 20130112004 | DIFFERENTIAL PRESSURE GAUGE - A sensor assembly including a flexible member having a first end and a second end, a rotating member connected to the second end of the flexible member, a positional element disposed on the rotating member, and a sensor capable of sensing a movement of the positional element. A movement of the second end of the flexible member allows the rotating member and the positional element to rotate. | 05-09-2013 |
