Tool driving or impacting – Impacting devices – Hammer head comprises plural parts or diverse materials
Patent
1975-06-04
1976-05-25
Leppink, James A.
Tool driving or impacting
Impacting devices
Hammer head comprises plural parts or diverse materials
173131, 173135, E02D 700
Patent
active
039586472
ABSTRACT:
A very powerful pile driver is disclosed capable of operation in the air, partially submerged or totally submerged in the ocean for driving long piles into the ocean floor in deep water construction jobs. The pile driver includes a cylindrical housing, a movable massive weight within the housing, an annular cylindrical thrust-transferring member defining a discharge chamber below this weight, and a movable driving head attached to this annular member, forming a thrust-transmitting assembly adapted to be engaged with the pile. Pressurized gas such as compressed air is discharged from gas discharge apparatus, called an airgun located within the discharge chamber and provides two driving thrusts for each discharge. A cantilevered arm projecting from the gas discharge apparatus extends through and is straddled by an opening in the wall of the thrust-transmitting assembly and supports the cylindrical housing and feeds pressurized gas to the airgun which is temporarily in "floating" relationship during the instants when pile-driving thrusts are being transmitted, said arm engaging shock-absorbing means attached to the housing. Gas purging means enable seawater to be purged from the firing chamber of the airgun after the pile driver has initially been lowered into the sea in preparation for operation, and a position-responsive valve may be provided to monitor the operational relationships for protecting the equipment.
REFERENCES:
patent: 3646598 (1972-02-01), Chelminski
patent: 3721095 (1973-03-01), Chelminski
patent: 3788402 (1974-01-01), Chelminski
patent: 3817335 (1974-06-01), Chelminski
patent: 3892279 (1975-07-01), Amtsberg
Bolt Associates, Inc.
Leppink James A.
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