Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1981-03-02
1982-12-07
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
114295, 173DIG1, E02D 720
Patent
active
043624391
ABSTRACT:
An underwater pile driver assembly that includes a vertically disposed tubular housing that may slidably engage the upper end portion of a pile, with the housing having an upper open end, and the housing supporting an anvil that may be placed in abutting contact with the pile. An impact imparting ram is slidably and sealingly mounted in the housing, and may be successively raised to a first position therein. Pump means are provided to successively evacuate water from the interior of the housing between the ram and anvil. After each evacuation the ram is released to be forced downwardly by the hydrostatic head imposed on the upper surface thereof to impact the anvil, with the force imparted to the anvil being transverse to the pile to drive the latter downwardly. The greater the distance of the upper end of the housing from the surface of the water, the greater will be the magnitude of the downward force exerted on the pile each time the ram impacts the anvil. The ram has at least one transverse opening therein that has a movable member operatively associated therewith. On the downward movement of the ram the member closes the opening, and on the upward stroke of the ram the closure member moves to a second position to allow the interior of the housing to be flooded with water, and equalize the water pressure above and below the ram to permit it to be raised to the first position with a minimum of energy.
REFERENCES:
patent: 3721095 (1973-03-01), Cheminski
patent: 3820346 (1974-06-01), Wisotsky
patent: 3832858 (1974-09-01), Anders
patent: 4098355 (1978-07-01), Gendron et al.
Babcock William C.
Taylor Dennis L.
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