Last Updated: November 8, 2026

Details for Patent: 3,800,534

Name: Drug Patent Intelligence for US Patent 3800534
Creator: DrugPatentWatch
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Summary for Patent: 3,800,534

Title:	Auxiliary hydraulic power supply
Abstract:	An emergency hydraulic power supply for an aircraft or the like, including a hydraulic pump arranged to be driven by a turbine in turn driven by hot gas from a decomposition chamber, a fuel pump driven by the turbine for supplying fuel to the decomposition chamber, primary flow control valve means in the pump outlet for controlling fuel flow responsive to turbine speed, an ignition chamber communicable with the decomposition chamber and having a start grain for initiating turbine operation to start the fuel pump, a secondary control valve in the pump outlet, and control means for sensing turbine speed and opening the secondary valve when the turbine attains a speed indicating the start grain has about burned out, and closing the secondary valve in the event that the turbine attains a speed indicating the primary flow control valve means is inoperative to control turbine speed.
Inventor(s):	D Kacek
Assignee:	Sundstrand Corp
Application Number:	US00238352A
Patent Claim Types: see list of patent claims	Composition; Device;

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>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Germany	2313827	⤷ Start Trial
France	2177786	⤷ Start Trial
United Kingdom	1392271	⤷ Start Trial
Japan	S4913899	⤷ Start Trial
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