Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2011-05-24
2011-05-24
Saether, Flemming (Department: 3677)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S525110, C411S433000, C411S226000
Reexamination Certificate
active
07946021
ABSTRACT:
A double safety fastener prevents accidental disengagement. The double safety fastener is composed of a first and second threaded fastener. The two fasteners are joined with a pivotable protrusion extending from the first fastener into a recess of the second fastener. When both fasteners are engaged with a threaded rod, torque is transferred from the second fastener to the first fastener through the protrusion, recess interface. If the second fastener disengages the threaded rod, the second fastener will swing away from the threaded rod eliminating transfer of torque to the first fastener, thus eliminating the disengagement of the first fastener from the threaded rod. Conversely reengaging the disengaged second fastener to the threaded rod is accomplished by rotating (typically clockwise) and pressing the second fastener toward the first fastener thereby catching the beginning thread of threaded rod.
REFERENCES:
patent: 380526 (1888-04-01), Sears
patent: 518474 (1894-04-01), Wallace
patent: 655704 (1900-08-01), Gage
patent: 732590 (1902-01-01), Scholer
patent: 1212143 (1916-05-01), McGurn
patent: 1353382 (1920-09-01), Crissinger
patent: 1450048 (1923-03-01), Patterson
patent: 1777614 (1930-10-01), Hauger
patent: 2301634 (1941-02-01), Nicholay
patent: 2776692 (1957-01-01), Granberry
patent: 3265109 (1966-08-01), Hanfland
patent: 3908727 (1975-09-01), Osborne
patent: 4132146 (1979-01-01), Uhlig
patent: 4220187 (1980-09-01), Holmes
patent: 4619122 (1986-10-01), Simpson
patent: 4729703 (1988-03-01), Sato
patent: 4836727 (1989-06-01), Volkmann
patent: 4880343 (1989-11-01), Matsumoto
patent: 5020949 (1991-06-01), Davidson
patent: 6010289 (2000-01-01), DiStasio et al.
patent: 6287065 (2001-09-01), Berlin
patent: 6609867 (2003-08-01), Wakabayashi
patent: 6786690 (2004-09-01), Yamada
patent: 6821070 (2004-11-01), Thompson
patent: D557594 (2007-12-01), Whipple
patent: 7661915 (2010-02-01), Whipple
patent: 2917472 (2008-12-01), None
patent: 2007187215 (2007-07-01), None
Kochanowicz Sharon
Kochanowicz Thomas J.
Saether Flemming
LandOfFree
Double safety fastener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Double safety fastener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double safety fastener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2651277