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:
Oct. 07, 1980
Filed:
Jul. 07, 1978
Applicant:
Inventor:
Joost W Jansz, The Hague, NL;
Assignee:
Hollandsche Beton Groep N.V., Rijswijk, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D / ; E02D / ;
U.S. Cl.
CPC ...
173126 ;
Abstract
In an apparatus for driving a pile or similar object by the stroke of a hammer, the impact of a hammer stroke is transmitted to the pile or similar object through resilient means comprising a precompressed gas in at least two closed chambers, which may intercommunicate, arranged in series.