Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Reexamination Certificate
2007-05-08
2007-05-08
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
C411S308000, C411S411000
Reexamination Certificate
active
11052076
ABSTRACT:
A looseness resisting screw formed with an external thread includes a first thread area having a substantially uniform outer diameter and a second thread area extended from the first thread area toward a leading end of the screw. The second thread area has a plurality of fractional lead parts each of which has an outer thread diameter increasing along a helical direction of the fractional lead part from a start point to an end point, and the outer thread diameter is substantially equal to a thread root diameter at the start point, while the outer thread diameter is equal to a thread top diameter at the end point. The fractional lead part has a thread sectional area increasing along the helical direction from the start point to the end point, and the thread top diameter of the fractional lead part is slightly larger at the end point than the substantially uniform outer diameter of the first thread area so that the second thread area provides a tapping thread section.
REFERENCES:
patent: 1088892 (1914-03-01), Foreman
patent: 1465148 (1923-08-01), Rosenberg
patent: 1933332 (1933-10-01), May
patent: 3083609 (1963-04-01), Lovisek
patent: 3351115 (1967-11-01), Boehlow
patent: 3794092 (1974-02-01), Carlson et al.
patent: 4069730 (1978-01-01), Gutshall
patent: 4161132 (1979-07-01), Eklund et al.
patent: 4259889 (1981-04-01), Capuano
patent: 4900208 (1990-02-01), Kaiser et al.
patent: 5876168 (1999-03-01), Iwata
patent: 6676352 (2004-01-01), Chen-Chi et al.
patent: S61-286605 (1986-12-01), None
No affiliations
Kabushiki Kaisha Suzuki Rashi Seisakusho
Lau & Asso.
Saether Flemming
LandOfFree
Looseness resisting screw and stud hole does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Looseness resisting screw and stud hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Looseness resisting screw and stud hole will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3801330