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:
Dec. 07, 1982
Filed:
Oct. 28, 1977
Joost W Jansz, The Hague, NL;
Hollandsche Beton Groep N.V., Rijswijk, NL;
Abstract
A method of and apparatus for driving piles by the impact force delivered by a hammer disposed in a housing from the bottom end of which there extends downwardly a pile sleeve in which a pile anvil is held captive, in which shock absorbing means separate from the hammer are interposed between the bottom end of the housing and the pile anvil for absorbing rebounce forces reaching the top of the pile of lower magnitude to that of the impact force. A pile driving apparatus constructed according to another aspect of the invention comprises a hammer and resilient means in the path of travel of the hammer for transmitting the impact force of the hammer to a pile, and stop means for cutting out the resilient effect of the resilient means on the impact force by delivering a non-resilient blow to the pile.