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| Number | Title | Issue Date |
| 7389685 | Downhole pressure transmitter A downhole pressure transmitter apparatus and method of making the same. A pressure fitting can be provided in association with a tube formed into a spiral shape. One end of said tube is sealed and the other end of said tube is affixed to said pressure fitting. As t... | 06/24/2008 |
| 7066644 | Apparel indicating thermometer The apparel indicating thermometer has a housing, a circular dial board disposed within the housing, a pointer situated on the face of the dial board, and a thermometer movement attached to a back surface of the housing. The thermometer movement has an arbor which r... | 06/27/2006 |
| 6758097 | Pressure gauge spring The pressure gauge spring is a responsive and easy to manufacture gauge for connection to a pressure source. The spring assembly comprises a coiled hollow tube having a first end and a second end with a body portion therebetween, the hollow tube adapted to produce a... | 07/06/2004 |
| 6604428 | Bourdon-tube pressure gauge A structure for Bourdon-tube pressure gauge includes a frame on which a needle gear and a limit bar are respectively connected. A Bourdon tube is connected between a test tip and an indicator which is pivotally connected to the frame. A rack portion is co... | 08/12/2003 |
| 5952579 | Ultra-high purity Bourdon tube pressure gauge system A reduced volume socket body and a reduced volume tube are used in a pressure gauge system in semi-conductor fabrication process equipment. The socket body includes an outlet and the tube has an end connected to the outlet. The outlet is a shaped, weld pr... | 09/14/1999 |
| 5834651 | Heat treated rapid response pressure gauge spring In general, the invention features a spring assembly for a gauge with a hollow metal tube that changes in volume in response to differential pressures applied across the walls. The tube has a neck connected to a fitting of the gauge, a body connected at o... | 11/10/1998 |
| 5481921 | Snap-fit assembly of direct drive Bourdon tube pressure gauge A pressure gauge is disclosed includes a snap-in interfit between a window and case and between the case and socket. A coiled Bourdon tube within the case directly drives a pointer located intervening between the window and a dial retained by the window.... | 01/09/1996 |
| 5377539 | Valve stem extender with integral air pressure gauge An air pressure gauge is provided integrally with a valve stem extender as used with automotive vehicle wheels mounting tubeless or tube-type air inflated tires. The gauge comprises a Bourdon tube concentrically coiled about the barrel of the valve stem e... | 01/03/1995 |
| 5230250 | Capacitor and pressure transducer A dual capacitor device for utilizing dependent capacitances for measurement purposes where an upper capacitor base member and a lower capacitance base member are arranged with parallel capacitor surfaces in horizontal planes and where the parallel capaci... | 07/27/1993 |
| 5142913 | Non-quartz resonating transducer A transducer for measuring a moment force as a related function of pressure and tension where a spirally wound bourdon tube has a confined end arrayed to apply a moment force to pretensioned metal vibratory elements. The change in tension in the pretensio... | 09/01/1992 |
| 5070736 | Differential pressure sensor with read-out device A differential pressure sensor comprises a pair of bourdon tubes disposed in an arrangement wherein deflections of the two bourdon tubes resulting from fluid pressures connected thereto take place in two opposite directions and the deflective extremities ... | 12/10/1991 |
| 4924697 | Tire-mounted air pressure gauge assembly The present invention is an improvement to a tire mounted air pressure gauge for use on vehicles having inflatable tires. The air pressure gauge has a dial face, with a coiled pressure responsive spring expandable to indicate the pressure detected by the ... | 05/15/1990 |
| 4738141 | Pressure sensor An improved pressure sensor includes a Bourdon tube, as its sensing element, and an indicator controlled thereby. At least one tightly closed container is secured to a free end of the Bourdon tube and is partly filled with a bulk material. If the Bourdon ... | 04/19/1988 |
| 4682501 | Temperature compensated Bourdon tube gauge A temperature-compensated Bourdon tube gauge for indicating a parameter of a pressurized fluid, including a support structure, a Bourdon tube having an open fixed end receiving the fluid and a free closed end carrying an indicating member, a dial member c... | 07/28/1987 |
| 4667517 | Rapid response pressure gauge spring In general, the invention features a spring assembly for a gauge comprising a hollow metal tube adapted to change in volume in response to differential pressures applied across its walls, the tube having a neck portion adapted to be connected to a fitting... | 05/26/1987 |
| 4646406 | Welded edge bourdon strip thermometer-manometer A bourdon tube for gas and liquid-filled thermometers and pressure gauges constructed by edge welding two strips of isoelastic nickel alloy to form a wall to wall low volume bourdon tube that exhibits a low ambient temperature effect and improved rangeabi... | 03/03/1987 |
| 4455874 | Digital pressure transducer A digital pressure transducer is formed by mounting a force-sensitive resonator to a structure of nonsymmetrical configuration which produces loads under applied pressure. The frequency of the resonator is measured to provide a digital indication of the a... | 06/26/1984 |
| 4279161 | Gauge A pressure gauge is disclosed which is generally suitable for use in connection with a fire extinguisher. The pressure responsive element is rotatably secured in position in the casing by an adjustable sleeve. The zero reference dial mark is provided on t... | 07/21/1981 |
| 4191056 | Pressure gauge spring A pressure responsive spring element for a gauge is made from cold worked metal.... | 03/04/1980 |
| 3952598 | Pressure gauge construction A pressure gauge of small size and type suitable for fire extinguisher use. Comprising the gauge is a dial plate secured in keyed registration onto the front face of the casing. A tubular stem extending laterally from the inside face of the viewing crysta... | 04/27/1976 |
