Patent 10697398

Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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Prior art

Earlier patents, publications, and products that may anticipate or render the claims unpatentable.

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To identify the most relevant prior art for US patent 10697398, I will examine the "References Cited" section from the patent document itself on Google Patents.

Upon reviewing US Patent 10697398 on Google Patents (https://patents.google.com/patent/[US10697398](/patent/US10697398)/en), the following prior art references are cited:

US Patent Documents:

  1. US2909153A

    • Full Citation: US2909153A, Carburetor with fuel cutoff.
    • Publication/Filing Date: Published: Oct 20, 1959. Filed: Oct 26, 1956.
    • Brief Description: This patent describes a carburetor featuring a fuel cutoff mechanism designed to prevent fuel dribbling after the engine is shut off. It includes a solenoid-operated valve that can stop fuel flow to the idle passage.
    • Potential Anticipated Claims (35 U.S.C. § 102): This patent potentially anticipates aspects of Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) and Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), specifically regarding a liquid fuel cut-off/shutoff mechanism within a carburetor to interrupt liquid fuel flow. The solenoid-operated valve is a form of fuel cut-off. It may also anticipate Claim 4 (Method of Assembling a Dual Fuel Engine) concerning the attachment of a liquid fuel cut-off to a carburetor.

  2. US3955543A

    • Full Citation: US3955543A, Carburetor with idle fuel cut-off.
    • Publication/Filing Date: Published: May 11, 1976. Filed: May 17, 1974.
    • Brief Description: This patent describes an idle fuel cut-off mechanism for a carburetor. The mechanism typically involves a solenoid valve that blocks the idle fuel passage when the ignition is turned off, preventing engine run-on (dieseling).
    • Potential Anticipated Claims (35 U.S.C. § 102): Similar to US2909153A, this patent potentially anticipates elements of Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) and Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff) by disclosing a fuel cut-off for liquid fuel in a carburetor. The method described in Claim 4 (Method of Assembling a Dual Fuel Engine), involving attaching a liquid fuel cut-off, could also be anticipated.

  3. US4295450A

    • Full Citation: US4295450A, Automatic fuel shut-off.
    • Publication/Filing Date: Published: Oct 20, 1981. Filed: Sep 17, 1979.
    • Brief Description: This patent relates to an automatic fuel shut-off system for internal combustion engines, often used in lawnmowers or other small engines, to stop fuel flow when the engine is not running or during an event like tipping.
    • Potential Anticipated Claims (35 U.S.C. § 102): This reference is broad in its scope of a "fuel shut-off." It could potentially anticipate the general concept of a fuel shutoff for liquid fuel as described in Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and the method step in Claim 4 (Method of Assembling a Dual Fuel Engine).

  4. US4364350A

    • Full Citation: US4364350A, Fuel supply system for internal combustion engines.
    • Publication/Filing Date: Published: Dec 21, 1982. Filed: Sep 29, 1980.
    • Brief Description: This patent describes a fuel supply system for internal combustion engines, particularly focusing on preventing fuel leakage when the engine is stopped. It includes a valve arrangement for controlling fuel flow.
    • Potential Anticipated Claims (35 U.S.C. § 102): This reference, like the others, generally discloses a system to control liquid fuel flow and prevent leakage, potentially anticipating the broad concept of a liquid fuel cut-off/shutoff in Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and the method step in Claim 4 (Method of Assembling a Dual Fuel Engine).

  5. US4643154A

    • Full Citation: US4643154A, Fuel control system for dual fuel engine.
    • Publication/Filing Date: Published: Feb 17, 1987. Filed: Dec 11, 1984.
    • Brief Description: This patent specifically addresses a fuel control system for a dual fuel engine capable of running on liquid or gaseous fuel. It includes mechanisms for switching between fuels and controlling their delivery.
    • Potential Anticipated Claims (35 U.S.C. § 102): This is highly relevant as it explicitly covers a "dual fuel engine." It directly anticipates the core elements of Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) including an engine operable on gaseous and liquid fuel and a switch to change operation. The concept of a liquid fuel cut-off when switching to gaseous fuel would be a key aspect of such a system. It also impacts Claim 4 (Method of Assembling a Dual Fuel Engine), particularly the steps of providing a dual fuel engine and coupling a switch.

  6. US4682570A

    • Full Citation: US4682570A, Fuel control system for dual fuel engines.
    • Publication/Filing Date: Published: Jul 28, 1987. Filed: Jan 2, 1986.
    • Brief Description: This patent describes a fuel control system for an internal combustion engine capable of operating on either gasoline or liquefied petroleum gas (LPG). It includes a mechanism to prevent both fuels from being supplied simultaneously and ensures proper fuel flow during transitions.
    • Potential Anticipated Claims (35 U.S.C. § 102): This is also highly relevant due to its focus on "dual fuel engines" and preventing simultaneous fuel supply. It anticipates elements of Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) regarding a dual fuel engine, a switch to change operation, and a liquid fuel cut-off to prevent overly rich conditions during changeover. It also impacts Claim 4 (Method of Assembling a Dual Fuel Engine).

  7. US5167215A

    • Full Citation: US5167215A, Fuel system for dual fuel engine.
    • Publication/Filing Date: Published: Dec 1, 1992. Filed: Mar 2, 1992.
    • Brief Description: This patent details a fuel system for a dual fuel engine, specifically for operating on both liquid and gaseous fuels. It describes valves and controls for managing the flow of each fuel type.
    • Potential Anticipated Claims (35 U.S.C. § 102): As another dual fuel engine system, this patent strongly anticipates the foundational aspects of Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) and the corresponding method steps in Claim 4 (Method of Assembling a Dual Fuel Engine). The specific control of liquid fuel flow during dual-fuel operation would be central to its teaching.

  8. US5293847A

    • Full Citation: US5293847A, Dual fuel system with fuel selection logic.
    • Publication/Filing Date: Published: Mar 15, 1994. Filed: Sep 20, 1993.
    • Brief Description: This patent discloses a dual fuel system that uses electronic logic to control the selection and supply of either liquid or gaseous fuel to an internal combustion engine.
    • Potential Anticipated Claims (35 U.S.C. § 102): This reference is very strong for anticipating Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) due to its explicit mention of a "dual fuel system with fuel selection logic" and the control of fuel supply. The concept of a liquid fuel cut-off upon selection of gaseous fuel would be inherently present in a system designed to prevent simultaneous fuel delivery. The method of assembly in Claim 4 (Method of Assembling a Dual Fuel Engine) is also strongly impacted.

  9. US6547662B2

    • Full Citation: US6547662B2, Combination gas and liquid fuel carburetor.
    • Publication/Filing Date: Published: Apr 15, 2003. Filed: Dec 20, 2000.
    • Brief Description: This patent describes a carburetor designed to handle both gaseous and liquid fuels. It includes a mechanism for switching between the two fuel types.
    • Potential Anticipated Claims (35 U.S.C. § 102): This directly relates to the carburetor aspect of the invention. It could anticipate the carburetor described in Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and Claim 3 (Carburetor with Non-Linear Fuel Shutoff) if its switching mechanism involves a non-linear fuel shutoff. It also impacts the carburetor attachment steps in Claim 4 (Method of Assembling a Dual Fuel Engine).

  10. US6976458B2

    • Full Citation: US6976458B2, Carburetor fuel shut-off valve and system.
    • Publication/Filing Date: Published: Dec 20, 2005. Filed: Nov 25, 2002.
    • Brief Description: This patent describes a fuel shut-off valve for a carburetor, intended to control fuel flow, often to prevent problems like engine run-on.
    • Potential Anticipated Claims (35 U.S.C. § 102): This reference directly teaches a "carburetor fuel shut-off valve," making it relevant for Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and Claim 3 (Carburetor with Non-Linear Fuel Shutoff) if the valve operates without linear motion. It also impacts the method step of attaching a liquid fuel cut-off in Claim 4 (Method of Assembling a Dual Fuel Engine).

  11. US8895058B2

    • Full Citation: US8895058B2, Fuel cut-off system for a dual fuel engine.
    • Publication/Filing Date: Published: Nov 25, 2014. Filed: May 23, 2012.
    • Brief Description: This patent is highly relevant, specifically disclosing a "fuel cut-off system for a dual fuel engine." It aims to prevent simultaneous fuel delivery and manage transitions between liquid and gaseous fuels.
    • Potential Anticipated Claims (35 U.S.C. § 102): This patent directly and strongly anticipates Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) by describing a fuel cut-off system for a dual fuel engine that interrupts liquid fuel upon switching. It also highly anticipates aspects of Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff) and the method described in Claim 4 (Method of Assembling a Dual Fuel Engine).

  12. US20130008407A1

    • Full Citation: US20130008407A1, Two-fuel engine, particularly for an electrical power generator.
    • Publication/Filing Date: Published: Jan 10, 2013. Filed: Jul 9, 2012.
    • Brief Description: This application describes a two-fuel engine, particularly for an electrical power generator, with a system for switching between liquid and gaseous fuels.
    • Potential Anticipated Claims (35 U.S.C. § 102): This is very relevant as it describes a two-fuel engine for a generator. It strongly anticipates Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) and Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), particularly the components relating to a dual-fuel engine in a generator context and the mechanism for switching fuels. The method in Claim 4 (Method of Assembling a Dual Fuel Engine) is also directly impacted.

  13. US20140130768A1

    • Full Citation: US20140130768A1, Fuel cut-off system for a dual fuel engine.
    • Publication/Filing Date: Published: May 15, 2014. Filed: Nov 12, 2013.
    • Brief Description: This patent application describes a fuel cut-off system specifically for a dual fuel engine, aiming to prevent both fuels from being supplied simultaneously and managing fuel transitions.
    • Potential Anticipated Claims (35 U.S.C. § 102): This is another highly relevant reference that directly discloses a "fuel cut-off system for a dual fuel engine." It strongly anticipates Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and the method described in Claim 4 (Method of Assembling a Dual Fuel Engine).

  14. US20150363099A1

    • Full Citation: US20150363099A1, Dual fuel generator with a remote fuel regulator.
    • Publication/Filing Date: Published: Dec 17, 2015. Filed: Jun 12, 2015.
    • Brief Description: This patent application describes a dual fuel generator with a remote fuel regulator. It covers systems for delivering and regulating both liquid and gaseous fuels.
    • Potential Anticipated Claims (35 U.S.C. § 102): This reference is the immediate parent application (continuation-in-part of U.S. patent application Ser. No. 14/738,060, filed Jun. 12, 2015, which is US20150363099A1). Therefore, it discloses much of the same subject matter. It directly anticipates Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off), Claim 2 (Batteryless Dual Fuel Generator with Fuel Shutoff), and Claim 4 (Method of Assembling a Dual Fuel Engine). Any differences would likely be in the specifics of the liquid fuel cut-off mechanism, which might be further developed in US10697398B2.

Foreign Patent Documents (Example):

  1. JP2004245136A
    • Full Citation: JP2004245136A, DUAL FUEL ENGINE.
    • Publication/Filing Date: Published: Sep 2, 2004. Filed: Feb 18, 2003.
    • Brief Description: This Japanese patent application describes a dual fuel engine.
    • Potential Anticipated Claims (35 U.S.C. § 102): This broadly anticipates Claim 1 (Dual Fuel Engine with Liquid Fuel Cut-off) as it relates to the concept of a dual fuel engine. Specific details would be needed to assess anticipation of the liquid fuel cut-off.

Most Relevant Prior Art:

The most relevant prior art documents under 35 U.S.C. § 102 appear to be those that explicitly address dual fuel engines and fuel cut-off systems for such engines, especially in the context of switching between fuels and preventing simultaneous delivery. These directly overlap with the core inventive concepts of US10697398B2.

Therefore, the following U.S. patent documents are considered most relevant:

  • US4643154A (Fuel control system for dual fuel engine)
  • US4682570A (Fuel control system for dual fuel engines)
  • US5167215A (Fuel system for dual fuel engine)
  • US5293847A (Dual fuel system with fuel selection logic)
  • US8895058B2 (Fuel cut-off system for a dual fuel engine)
  • US20130008407A1 (Two-fuel engine, particularly for an electrical power generator)
  • US20140130768A1 (Fuel cut-off system for a dual fuel engine)
  • US20150363099A1 (Dual fuel generator with a remote fuel regulator)

These references, particularly US8895058B2, US20130008407A1, and US20140130768A1, specifically teach systems and methods for fuel cut-off in dual fuel engines and generators, directly addressing the central problem and solution presented in US10697398B2. US20150363099A1 is particularly relevant as it is the parent application. The other cited U.S. patents like US6547662B2 and US6976458B2 also contribute to the understanding of prior art related to dual fuel carburetors and fuel shut-off valves in general.

Generated 5/23/2026, 12:47:21 PM