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:
May. 22, 2001
Filed:
Jun. 08, 1998
Johannes Werner, Hamburg, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
A process is provided for automatically screw-connecting two components using the torque-controlled tightening method, and to a stud and a union nut provided for carrying out the process. Also provided are an automatic fitting machine and a connecting element via which the two components are screw-connected. In order for it to be possible to execute the screw-connection operation quickly and to obtain a secure connection between the two components, the process provides for the connecting element first of all to be pre-tightened with rotary-angle control and then to be tightened definitively with torque control. The connecting element has two same-direction threaded sections of different pitches and each threaded section is screw-connected to one component in each case. The stud for carrying out the process has a screw head for the engagement of a suitable fitting tool, a marking which indicates the angular position of the stud being arranged on the screw head. The union nut for carrying out the process has a first threaded section, designed as an internal thread which extends over not more than approximately half the length of the union nut and is adjoined by a thread-free inner section.