The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 1983
Filed:
Feb. 26, 1980
Applicant:
Inventor:
Dirk Arentsen, Leiderdorp, NL;
Assignee:
Hollandsche Beton Groep N.V., Rijswijk, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D / ; E02D / ;
U.S. Cl.
CPC ...
173127 ; 405228 ; 173D / ;
Abstract
The hammer of an underwater pile driving apparatus is movable upwards and downwards in a housing which, in operation, is filled with a liquid which is present both above and below the hammer, the hammer being driven at least on the upwards direction by a driving liquid which is pressurized by a motor driven pump located on or adjacent the housing and which is the same as the liquid in which the hammer moves.