Joints and connections – With distinct fluid or article handling or directing feature
Reexamination Certificate
2005-11-08
2005-11-08
Cottingham, John R. (Department: 2116)
Joints and connections
With distinct fluid or article handling or directing feature
C403S150000
Reexamination Certificate
active
06962458
ABSTRACT:
A coupling device for equipment implements is described, which coupling device does not impair the lubricity of bearing sections when the equipment is in service, does not cause seizure during rotation of bearings, does not need frequent feeding of grease to the bearing sections from outside, and provides good noise absorbability. The coupling device has such a structure that a metal based contact material7capable of storing a lubricating oil and/or lubricant is interposed between an implement bushing1made from steel and implement pin4of an implement for construction equipment.
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Ohnishi Tetsuo
Takayama Takemori
Cottingham John R.
Komatsu Ltd.
Rader & Fishman & Grauer, PLLC
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