Invalidity dossier
US 4827888
Nozzle
Current assignee: Nitrous Oxide Systems Inc
Added 9/21/2026, 9:30:54 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 4,827,888 ("Nozzle")
Title: Nozzle
Patent number / application: US 4,827,888 A; application US07/184,334. (The source also lists related prior patent US4,798,190, from which priority is claimed.)
Assignee: Nitrous Oxide Systems Inc (original and current assignee per the source).
Inventors: Dale L. Vaznaian; Michael J. Thermos.
Key dates: Priority date 1986-05-30 (claimed from US06/868,938); filing date 1988-04-21; publication/grant date 1989-05-09. Source lists legal status as "Expired – Fee Related," with an anticipated expiration of 2006-05-30.
Purpose: To improve introduction and atomization of fuel into a combustion chamber in nitrous-oxide injection systems. The excerpt states a disadvantage of prior art is poor mixing of nitrous oxide and fuel: nitrous oxide is highly pressurized (often 500–1000 PSI) while fuel is at low pressure (typically about 7 PSI), and separate nozzles produce a fuel stream that splatters, puddles in the manifold or combustion chamber, and is difficult to ignite.
Plain-language scope: An injection nozzle uses nitrous oxide to aid introduction and atomization of fuel. It is a Y-shaped nozzle with two input ports and one output port. One input port admits nitrous oxide into a hollow sleeve, exiting at the output port; the second admits fuel. A fuel line coupled to the second input port extends the length of the hollow member and terminates at the output port. The nitrous oxide is introduced at approximately 500–1000 PSI and the fuel at approximately 3–12 PSI; the high-pressure nitrous oxide atomizes the fuel for fuller dispersion and more efficient burning. In the preferred embodiment the member is generally cylindrical and hollow, with an angular output port in its side positioned for optimum introduction angle into the manifold port. Figures 1–5 show preferred and alternate embodiments.
What the excerpt does not establish: It omits the full claim text and figures, the complete detailed description beyond the introduced portions, and any prosecution history. It does not establish validity, enforceability, or the accuracy of the legal status listed. It does not establish actual commercial use. Dates and status are as listed by the source, which itself disclaims legal conclusions.
Generated 10/1/2026, 10:02:16 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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