Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Reexamination Certificate
2011-01-04
2011-01-04
Estremsky, Gary (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Thread or shank structure
C411S387800
Reexamination Certificate
active
07862280
ABSTRACT:
A saw tooth screw provides a screw thread divided into a first and a second thread sections. A plurality of slots, inclined with respect to a shank axial line, are disposed on each thread of the first thread section for dividing the thread into a plurality of thread segments, wherein each of the thread segment has a first inclined surface and a second inclined surface on two ends thereof; the first inclined surface is parallel to the second inclined surface. The thread of the second thread section is formed of a saw-tooth-shape by having recesses extending from a shank to an outer edge of the thread for debris of object to exit through the slots, thereby reducing the screwing torsion and increasing the screwing rotation speed.
REFERENCES:
patent: 2867786 (1959-01-01), Doetsch et al.
patent: 3083609 (1963-04-01), Lovisek
patent: 5044853 (1991-09-01), Dicke
patent: 5110245 (1992-05-01), Hiroyuki
patent: 2005/0186048 (2005-08-01), Dicke
Estremsky Gary
Shia Banger
Taiwan Shan Yin International Co., Ltd.
LandOfFree
Saw tooth screw does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Saw tooth screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saw tooth screw will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2710834