1-9 (Canceled)
10. A fuel cell power generation equipment in which an anode for oxidizing fuel and a cathode for reducing oxygen are formed with an electrolyte membrane in between, and liquid is used as a fuel, wherein at least one opposing wall surface of a fuel container has multiple air vent holes each having a gasliquid separation function, a liquid fuel holding material is filled on an inner wall surface of the fuel container, multiple unit cells consisting of an electrolyte membrane, an anode and a cathode having a diffusion layer are mounted on an electrically insulated outer wall surface of said fuel container, the diffusion layer is in contact with the liquid fuel holding material, and the unit cells are electrically connected in series, parallel, or in combination of series and parallel each other.
11-13 (Canceled)
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A downhole pressure transmitter apparatus, comprising;
a housing;
a nonsilicon based sensing element maintained within said housing;
a pressure fitting connected to said housing; and
a tube formed into a spiral shape, wherein one end of said tube is sealed and another end of said tube is affixed to said pressure fitting, wherein as said tube is exposed to a differential pressure, said tube unwinds, thereby creating a rotary motion that is proportional and linear to said differential pressure, thereby providing an indication of pressure within a downhole environment.
2. The apparatus of claim 1 wherein said tube comprises a Bourdon tube.
3. The apparatus of claim 1 further comprising a calibration window in said housing.
4. The apparatus of claim 1 wherein said rotary motion is captured utilizing said sensing element.
5. The apparatus of claim 4 wherein said sensing element comprises an RVDT device.
6. The apparatus of claim 4 wherein said sensing element comprises a Hall Effect sensor.
7. The apparatus of claim 4 wherein said sensing element comprises a magnetoresistive sensor.
8. The apparatus of claim 4 wherein said sensing element comprises a fiber optic based sensor.
9. The apparatus of claim 4 wherein said Bourdon tube is wrapped around said sensing element.
10. A downhole pressure transmitter apparatus, comprising;
a housing;
a nonsilicon based sensing element maintained within said housing;
a pressure fitting connected to said housing; and
a bourdon tube formed into a spiral shape, wherein one end of said bourdon tube is sealed and another end of said bourdon tube is affixed to said pressure fitting, wherein as said bourdon tube is exposed to a differential pressure, said bourdon tube unwinds, thereby creating a rotary motion that is proportional and linear to said differential pressure wherein said rotary motion is captured by said sensing element, thereby providing an indication of pressure within a downhole environment.
11. The apparatus of claim 10 wherein said sensing element comprises an RVDT device.
12. The apparatus of claim 10 wherein said sensing element comprises a Hall Effect sensor.
13. The apparatus of claim 10 wherein said sensing element comprises a magnetoresistive sensor.
14. The apparatus of claim 10 wherein said sensing element comprises a fiber optic based sensor.
15. A method for forming a downhole pressure transmitter apparatus, comprising:
providing a nonsilicon based sensing element within a housing;
providing a pressure fitting connected to said housing; and
configuring a tube into a spiral shape;
sealing one end of said tube;
affixing another end of said tube to said pressure fitting, wherein as said tube is exposed to a differential pressure, said tube unwinds, thereby creating a rotary motion that is proportional and linear to said differential pressure sensor, thereby forming a downhole pressure transmitter apparatus that provides an indication of pressure within a downhole environment.
16. The method of claim 15 wherein said tube comprises a Bourdon tube.
17. The method of claim 15 further comprising providing a calibration window in said housing.
18. The method of claim 15 further comprising providing said sensing element for capturing said rotary motion.
19. The method of claim 15 wherein said downhole environment comprises a drilling environment.
20. The method of claim 18 further comprising wrapping said tube about said sensing element.