Overlapping stage burn for multistage launch vehicles
Patent 4964340 Issued on October 23, 1990. Estimated Expiration Date: 
October 7, 2008. 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.
October 7, 2008. 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 ReferencesInventorsAssigneeApplicationNo. 254601 filed on 10/07/1988US Classes:102/377, Having separation means60/225, Sequentially operated60/250, Plural propellants to burn sequentially60/263Plural motive fluid generating means or plural outletsExaminersPrimary: Jordan, Charles T.Assistant: Carone, Michael J. Attorney, Agent or FirmInternational ClassB64G 001/40AbstractThe invention relates to a multistage launch vehicle and method of multistage launch vehicle operation in which at least one subsequent motor stage is ignited following lift-off in partially overlapping relationship with its immediately preceding motor stage prior to shut-down and staging of the preceding motor stage in order to effect positive thrust control over the launch vehicle throughout shut-down and staging of the preceding motor stage. Preferably, each of the motors comprising the subsequently fired motor stage is provided with a thrust profile in which maximum thrust is attained prior to staging of the preceding stage.Other References
Field of SearchAuxiliaryLaunching Explosive jet Attitude control mechanisms Fluid reaction type Sequentially operated Fuel flow control Plural propellants to burn sequentially Including ignition means Plural motive fluid generating means or plural outlets HAVING REACTION MOTOR Having separation means Explosive | |
