Multicannular fluid delivery system with pressure sensitive alarm
March 30, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1736923 3464450 Combined flow measuring and valve leakage indicator Pressure responsive safety system for fluid lines Hose assembly & clip therefor Device for protection against an excess pressure Hydraulic safety hose with fluid removal conduit Multiaxial fuel transfer pipe system Pipe casting machine having improved pipe mold stabling rings Gasoline containment systems with leak-resistant plastic fittings InventorApplicationNo. 050138 filed on 03/30/1998US Classes:137/312, WITH LEAKAGE OR DRIP COLLECTING137/557, Fluid pressure responsive indicator, recorder or alarm138/109, With end structure138/113, Surrounding radially spaced duct with axially spaced supports for internal duct138/115, Longitudinally extending common wall340/605, Leakage340/626PressureExaminersPrimary: Ferensic, Denise L.Assistant: Kim, Joanne Y. International ClassesF16K 023/00F16L 009/00 AbstractThe instant invention consists of an inner cannula of hosing amenable to transport of a liquid coupled with an outer cannula of hosing amenable to transport of a gas. As respects one embodiment, affixed to outer walling of the inner cannula and to inner walling of the outer cannula are rigid struts, typically three or four, at 120° or right angles with respect to one another at various points along the respective lengths of the cannulae that serve to maintain separation of the cannulae from one another at times when the inner cannula is filled with a liquid and the outer cannula is filled with a gas under pressure. A second embodiment is strut free. Each cannula has an ingress end whereat a liquid is introduced into the inner cannula and whereat a gas is introduced into the outer cannula. Each cannula likewise has an egress end whereat the liquid is expelled typically from a nozzle thereat located and the gas is amenable to discharge via the opening of a valve component of the instant invention likewise thereat located. Moreover, the instant invention is characterized by the presence of alarm modalities serving to alert a user thereof to the fact of an unanticipated rise or drop in intercannular gas pressure.Field of SearchWith end structureSurrounding radially spaced duct with axially spaced supports for internal duct Longitudinally extending common wall With spacer and encircling element Coaxial COMBINED With indicating means For concentric tubes or pipes (e.g., well casing or wellhead type) Collector associated with receiver support Pipe Fluid pressure responsive indicator, recorder or alarm WITH INDICATOR, REGISTER, RECORDER, ALARM OR INSPECTION MEANS WITH LEAKAGE OR DRIP COLLECTING Leakage Pressure | |
