Lubrication – Lubricators – Nipple or fitting
Reexamination Certificate
2005-04-05
2005-04-05
Fenstermacher, David M. (Department: 3682)
Lubrication
Lubricators
Nipple or fitting
C184S028000, C184S039000, C184S007200
Reexamination Certificate
active
06874599
ABSTRACT:
A fifth wheel lubricating system for greasing the interface between the upper and lower fifth wheel plates while the trailer is couple to the tractor. The system supplies grease form a cartridge that is coupled to a solenoid activated grease valve and controlled by means of an electrical controller mounted in the cab or on the catwalk of the fifth wheel tractor. The grease gun is operated pneumatically from an onboard air compressor or can be manually operated by means of a hand pump lever built into the grease gun. A primary grease hose carries grease from the grease valve to a grease distribution hub, where it is distributed to two or more distribution hoses that connect to the bottom side of the tractor mounted lower fifth wheel plate. The grease is forced up through holes in the lower fifth wheel plate, into grease slots on the top side of the lower plate. In operation, the driver can push a button on the controller and force a desired amount of grease into the grease slots located at the interface between the upper and lower fifth wheel plates, thereby providing a more convenient, cleaner, and more efficient means of lubricating a fifth wheel.
REFERENCES:
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patent: 2914630 (1959-11-01), Ralston
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patent: 5417308 (1995-05-01), Hartl
patent: 5845802 (1998-12-01), Bruns et al.
patent: 6098754 (2000-08-01), Toner
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