초록 ▼

A liquid filter (10) housing an annular filter element (16) has an annular space (24) between the filter element and the housing and viewable through the housing such that an operator can see the level of liquid in the annular space as an indication of when to replace the filter element, the higher

A liquid filter (10) housing an annular filter element (16) has an annular space (24) between the filter element and the housing and viewable through the housing such that an operator can see the level of liquid in the annular space as an indication of when to replace the filter element, the higher the level of liquid in the annular space the greater the pressure drop across the filter element. The rise in liquid level in the annular space is delayed for applications where the filter element is otherwise changed prematurely and has a longer life than otherwise indicated by the rising liquid level in the annular space. The delay is provided by a liquid and vapor impermeable sleeve (50) trapping vapor. In a further aspect, the sleeve is provided with apertures (70, 72, 74, 90, 92) filled by liquid-soluble buttons (76, 78, 80, 94, 96) providing filter element change interval indication, including advance sequential indication.

대표청구항 ▼

A liquid filter (10) housing an annular filter element (16) has an annular space (24) between the filter element and the housing and viewable through the housing such that an operator can see the level of liquid in the annular space as an indication of when to replace the filter element, the higher

A liquid filter (10) housing an annular filter element (16) has an annular space (24) between the filter element and the housing and viewable through the housing such that an operator can see the level of liquid in the annular space as an indication of when to replace the filter element, the higher the level of liquid in the annular space the greater the pressure drop across the filter element. The rise in liquid level in the annular space is delayed for applications where the filter element is otherwise changed prematurely and has a longer life than otherwise indicated by the rising liquid level in the annular space. The delay is provided by a liquid and vapor impermeable sleeve (50) trapping vapor. In a further aspect, the sleeve is provided with apertures (70, 72, 74, 90, 92) filled by liquid-soluble buttons (76, 78, 80, 94, 96) providing filter element change interval indication, including advance sequential indication. hydrogen storage device further comprises a compressor and a storage tank. 7. The system for the production and utilization of hydrogen described in claim 6, wherein the storage tank is a composite tank. 8. The system for the production and utilization of hydrogen described in claim 6, wherein the hydrogen storage device further comprises a liquification system. 9. The system for the production and utilization of hydrogen described in claim 8, in the storage tank is a vacuum insulated composite tank. 10. The system for the production and utilization of hydrogen described in claim 8, wherein the storage tank is a slush storage tank. 11. The system for the production and utilization of hydrogen described in claim 5, in the storage tank is a metal hydride tank. 12. The system for the production and utilization of hydrogen described in claim 5, wherein the storage tank is a carbon nanotube tank. 13. The system for the production and utilization of hydrogen described in claim 1, further comprising an energy storage device for storing the energy produced by at least one of the power plants and the electrical power source, said energy storage device in electrical communication with the power distribution device. 14. The system for the production and utilization of hydrogen described in claim 13, wherein the energy storage device is at least one deep-cycle marine battery. 15. The system for the production and utilization of hydrogen described in claim 1, further comprising: a water storage tank having an inlet in fluid communication with the water source and an outlet in fluid communication with the converter. 16. The system for the production and utilization of hydrogen described in claim 1, further comprising a propulsion device for providing motive force to a marine vessel, said propulsion device in electrical communication with the power distribution device. 17. The system for the production and utilization of hydrogen described in claim 16, wherein the propulsion device is an electrical motor in electrical communication with the power distribution device. 18. The system for the production and utilization of hydrogen described in claim 16, wherein the propulsion device is a mechanical transmission in mechanical communication with the power plant. 19. The system for the production and utilization of hydrogen described in claim 1, wherein the water to hydrogen converter is an electrolyzer. 20. The system for the production and utilization of hydrogen described in claim 19, wherein the electrolyzer is one of either a solid oxide electrolyzer or a steam electrolyzer. 21. The system for the production and utilization of hydrogen described in claim 1, wherein the water to hydrogen converter is a multiphoton photochemical device. 22. The system for the production and utilization of hydrogen described in claim 1, wherein the water to hydrogen converter is a multi-band-gap photoelectrochemical cell. 23. The system for the production and utilization of hydrogen described in claim 1, wherein the water to hydrogen converter is a photoelectrolysis device. 24. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a solar electrical device. 25. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a solar furnace steam source. 26. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a wind power source. 27. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a water drag power source. 28. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a nuclear power source. 29. The system for the production and utilization of hydrogen described in claim 1, wherein the electrical power source is a human-power source. 30. The sys