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:
Jul. 17, 1984
Filed:
Mar. 24, 1982
Applicant:
Inventor:
Paul Schmidt, D-5940 Lennestadt 14, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D / ;
U.S. Cl.
CPC ...
173128 ; 173131 ; 173132 ; 81463 ; 29275 ; 403334 ; 403368 ;
Abstract
An attachment for driving pipe wherein a plurality of concentric sleeves having diminishing diameters are arranged in driving engagement with a pipe end with a driving hammer operating to impart a driving force to the pipe, the sleeves being arranged to form a generally concial configuration such that the sleeves are in contact with each other at points which lie along lines of contact intersecting at the axis of the driving hammer to form an acute included angle.