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:
Jun. 08, 1993
Filed:
Jan. 10, 1992
Gregory C Givler, Issaquah, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A method of detecting rivets which are outside of a predetermined length tolerance includes holding a rivet in a first reference position with its head in a rivet hole countersink, and moving a probe, in the form of a rivet tail die, into contact with the rivet tail. The position of the probe when it contacts the rivet tail is detected and compared with the predetermined position tolerences corresponding to the rivet length tolerences. The rivet is held in the first reference position by a rivet head die with a force greater than the force exerted by the probe when contacting the rivet tail to ensure that the rivet stays in the reference position during the measuring step. If the rivet is too long or too short, a rivet recovery sequence is executed to remove the out-sized rivet and a new rivet is inserted and measured. When the rivet is confirmed to be within the length tolerance, the rivet dies are driven inward toward each other to upset the rivet.