Protective control system for water-jet propulsion systems
Patent 4100877 Issued on July 18, 1978. Estimated Expiration Date: 
September 27, 1996. 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.
September 27, 1996. 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 3175526 3314391 3852958 3867717 3910216 InventorsAssigneeApplicationNo. 05/727023 filed on 09/27/1976US Classes:440/1, MEANS TO CONTROL THE SUPPLY OF ENERGY RESPONSIVE TO A SENSED CONDITION114/275, With control means responsive to sensed condition318/588, Marine vehicles440/38, JET DRIVE440/87, For engine speed60/221, Motive fluid principally liquid60/233Condition responsive thrust varying meansExaminersPrimary: Kunin, Stephen G.Attorney, Agent or FirmInternational ClassesB63H 11/00 (20060101)B63H 11/04 (20060101) AbstractA protective system is provided for water-jet propulsion systems in which water entering through an intake port is discharged in a jet by a pump. Unloading and overspeed of the pump prime mover may occur if the intake comes out of the water and this is prevented by a system which senses the water pressure in the pump inlet and responds to the pressure and the rate of change of pressure to prevent overspeed of the prime mover by setting it to idling speed. When the pressure and rate of change indicate that the intake is again submerged, the prime mover is reset to normal operating control. | |
