Joints and connections – Articulated members – Lockable at fixed position
Reexamination Certificate
2005-03-22
2005-03-22
Cottingham, John R. (Department: 2116)
Joints and connections
Articulated members
Lockable at fixed position
C403S378000
Reexamination Certificate
active
06869243
ABSTRACT:
A cotter is used for locking or latching tubes or extensions together, and includes a shank having a lower end, a handle attached to top of the shank, a ferrule slidably attached onto the shank and arranged between the handle and the lower end of the shank and having a portion applied with an indicating layer. A spring may bias the ferrule toward the handle, to have the handle to selectively shield the indicating layer of the ferrule, and to indicate whether the ferrule has been suitably biased toward the handle or not, and to indicate whether the tubes and the extensions have been safely locked or latched together or not.
REFERENCES:
patent: 5433552 (1995-07-01), Thyu
patent: 5718660 (1998-02-01), Chen
patent: 5967956 (1999-10-01), Teeter
patent: 6786669 (2004-09-01), Tsui et al.
Baxley Charles E..
Cottingham John R.
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