Implements or apparatus for applying pushing or pulling force – Vehicle attached jack – Attached to trailer tongue
Reexamination Certificate
2005-08-09
2005-08-09
Wilson, Lee D. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Vehicle attached jack
Attached to trailer tongue
C254S419000, C254S425000
Reexamination Certificate
active
06926261
ABSTRACT:
A trailer tongue jack includes a grease (or zerk) fitting for providing grease to internal parts The jack includes an outer tube and an inner telescoping tube. A threaded insert (or nut) is fixedly attached inside an upper end of the inner telescoping tube. A screw shaft threadedly cooperates with the insert to extend or retract the inner telescoping tube from a lower end of the outer tube. A crank is provided to turn the screw shaft either directly or through gears, and a thrust bearing carries a vertical load between the screw shaft and the outer tube. The grease fitting allows the internal parts, and the thrust bearing in particular, to be easily lubricated.
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Averill, Jr. Edgar W.
Green Kenneth L.
Kaper II, Inc.
Wilson Lee D.
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