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.

Date of Patent:
Jun. 11, 2002

Filed:

Jun. 22, 2000
Applicant:
Inventor:

Jan Babak, Mlada Boleslav, CZ;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B 3/102 ; F16B 3/504 ;
U.S. Cl.
CPC ...
F16B 3/102 ; F16B 3/504 ;
Abstract

A connection bolt ( ) for repeated tightening beyond yield point which bolt ( ) comprises a head ( ) and a shank which shank is provided with a thread, whereby said head ( ) of said connection bolt ( ) is provided with at least one indication mark ( ) at a fixed defined mutual angle position to at least one indication sign ( ), which sign ( ) is provided on the free shank ( ) end relative to the axis (q—q) of the bolt ( ) rotation. This system of marking allows to determine the damage of said bolt ( ) exactly and to decide about further ability of said bolt ( ) to be used next time without any risk of destruction or decrease in quality of a joint.


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