Power plants – Pressure fluid source and motor – Pulsator
Patent
1979-04-30
1981-02-24
Gill, James J.
Power plants
Pressure fluid source and motor
Pulsator
60546, F15B 1702
Patent
active
042519934
ABSTRACT:
An hydraulic boat lift utilizing readily available city water as the pressure fluid comprises one or more lift cylinders buried vertically under a body of water with the upper ends of the cylinders protruding into the water. To increase the pressure of the water and the resultant lift of the hydraulic cylinder, a single booster cylinder and a transfer cylinder for each of the lift cylinders are provided with the piston in the booster cylinder having a larger area than any of said transfer pistons and being rigidly connected to one another so as to provide equal displacements of the booster and transfer pistons and to simultaneously operate all of the lift cylinders at equal rate of displacement. Means are provided for automatically operating the booster cylinder through a number of charge and discharge cycles to accomplish complete elevation of a cradle.
REFERENCES:
patent: 2499563 (1950-03-01), Bill
patent: 4112680 (1978-09-01), Grisebach
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