Sliding pedestal shaft for PTO driven implements
AssigneeDeere & Company
InventorsRoger D. Stephenson, James L. Vogt, Roger W. Frimml
Life of this patent
Estimating the term…
Abstract
An implement is coupled for being driven and towed by a tractor. A pedestal shaft is slidably mounted to the tongue of the implement and is coupled to the tractor PTO by a telescopic shaft which during turning and certain rolling and or pitching conditions of the tractor acts to cause rearward shifting of the pedestal shaft from a normal operating position. A spring assembly resists the rearward movement of the pedestal shaft and returns it to its normal position once the condition which caused its rearward movement no longer exists.
Claims10
In a driven implement adapted to be powered and towed by a tractor and including a fore-and-aft extending draft tongue respectively supporting, at fixed spaced apart first and second locations, front and rear pedestal bearings, a pedestal shaft received in said pedestal bearings and a telescopic shaft having a rear end coupled for driving the pedestal shaft and having a forward end adapted for being coupled to a tractor PTO shaft, the improvement comprising:
- said front and rear pedestal bearings including mounting means permitting the pedestal shaft to slide fore-and-aft relative thereto to and from a normal operating position wherein a forward end of the pedestal shaft is located at a forwardmost location relative to said draft tongue;
- and yieldable spring means coupled to said pedestal shaft for resisting rearward movement of the forward end of said pedestal shaft from said normal operating position and for returning the same to said normal operating position once conditions causing rearward shifting of the pedestal shaft are no longer in effect.
In a driven implement having a fore-and-aft extending draft tongue, a pedestal shaft supported by the draft tongue and a telescopic drive shaft coupled to the pedestal shaft and adapted for being coupled to a tractor PTO, the improvement comprising:
- mounting means coupling said pedestal shaft to the draft tongue for permitting relative fore-and-aft movement between the pedestal shafts, in its entirety, and the tongue from and to a normal working position wherein said pedestal shaft occupies a forwardmost location relative to said tongue;
- and biasing means coupled for yieldably resisting relative movement between said tongue and pedestal shaft, in its entirety, away from said normal working position and for restoring said normal working position of said tongue and pedestal shaft once a condition causing said relative movement from said normal working position has passed.
Dependencies are inferred from the claim text.