Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1975-08-28
1977-07-05
Taylor, Dennis L.
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
173DIG1, 175 6, E02D 710
Patent
active
040331393
ABSTRACT:
What follows is a description of a unique hammer for driving pile members onshore or offshore, an apparatus for driving pile members offshore, and a method of driving a pile member.
The hammer includes a displaceable ram structure which is reciprocated by a pressurized working fluid against a pile member-engaging anvil structure. The anvil structure is preloaded by a quantity of fluid compressed by the ram structure in the course of its impact delivering displacement. This preload causes the anvil structure to also be displaced in the impact delivering direction, but at a lower rate than the ram structure.
The method provides for directing a pressurized working fluid in a first direction to load a ram structure, directing a portion of this pressurized working fluid further in the first direction in order to decelerate the movements of the ram structure in the loading direction, to direct another portion of the pressurized working fluid in a second direction for producing a firing of the ram structure, and to preload an anvil structure utilizing the firing mode of the ram structure in order to cause the anvil structure to be displaced in the firing direction, but at a slower rate than the ram structure.
For driving a pile member from an offshore installation, a conduit structure is provided into which the pile member, the hammer and a supporting structure for the hammer are inserted and displaced in the course of driving the pile member. In addition to the method mentioned above, when driving a pile member from an offshore installation, the water immediately surrounding the area at which the anvil structure engages the pile member, is displaced.
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patent: 3502159 (1970-03-01), Pogonowski
patent: 3524322 (1970-08-01), Pogonowski
patent: 3646598 (1972-02-01), Chelminski
patent: 3747689 (1973-07-01), Frederick
patent: 3754403 (1973-08-01), Mott et al.
patent: 3860122 (1975-01-01), Cevnosek
patent: 3881557 (1975-05-01), Gendron et al.
Greigg Edwin E.
Taylor Dennis L.
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