Title: Water pressure-powered pile driving hammer

Abstract: The piston of a pile driving hammer is raised by hydraulic (water) pressure. As the hammer is permitted to fall, the water pressure is diverted from the cylinder, until the cycle begins again. Pressure surges, upon switching to and from pressure diversion, are turned to advantage by providing large pressure vessels with bag accumulators upstream and downstream of the hydraulic pressure supply pump. The water pressure is selectively throttled to control the frequency and amplitude of the stroke. The pressure vessel may be a pressure tank containing an air cushion. In this way, much of the pressure accumulated or reduced while the pump is working against an isolated pressure vessel acts in concert with the pump to advance the water when the respective pressure vessel is reconnected.

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Inventors: Reineke, Jr., Harry W. (New Orleans, LA, US)
Teague, Floydale (New Orleans, LA, US)

Application Number: 747871
Filing Date: 1976-12-06
Publication_date: 1978-05-16
Assignee:
Primary Class(es): 60/369 60/371, 60/416, 91/315
Other Classes:
US Patent Ref:

2665551	Jan, 1954	Chenault	60/414.
2802336	Aug, 1957	Ball	60/371.

Other Refs:
Primary Examiner: Geoghegan, Edgar W.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman