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:
Aug. 24, 1982
Filed:
Dec. 18, 1979
Applicant:
Inventors:
Josef Berzen, Oberhausen, DE;
Herbert Mrozik, Bottrop, DE;
Assignee:
Ruhrchemie AG, Oberhausen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D / ; F16F / ;
U.S. Cl.
CPC ...
173131 ;
Abstract
There is disclosed a pile-driver comprising a cylinder and a piston, the piston being in registry with a cap disposed over an article to be driven. The cap has a lining in striking relationship with the piston, which lining comprises a thermoplastic and a metal powder.