Earth working – Rolling – rotating or orbitally moving tool – Tool has circumferentially spaced teeth – tines – blades or...
Reexamination Certificate
1999-11-18
2001-03-06
Novosad, Christopher J. (Department: 3671)
Earth working
Rolling, rotating or orbitally moving tool
Tool has circumferentially spaced teeth, tines, blades or...
C172S544000, C172S552000
Reexamination Certificate
active
06196329
ABSTRACT:
It is an object of the invention to provide harrow teeth and to a dampening attachment to harrow teeth The teeth and dampener both having a coiled portion with the coiled portion on the teeth providing a resilient flexing action upon the teeth biasing the teeth forward when the teeth are engaged in the ground and moved forward along the ground while engaged so that the teeth are flexed backward from encounter ground resistance in the engagement with the ground the foreward biasing will act to return the teeth to their normal position and with the coiled portion on the dampener providing a dampening coil spring attachable to the harrow teeth to bias the harrow teeth in opposition to the biasing action of the harrow teeth so that when the teeth are flexed rearward due to an encounter with the ground and then the ground d iased against forward movement and acts slow or dampen the reactive forward springing action of the harrow teeth so that there is a less sudden abruptiveness to the backward reactive movement of the harrow teeth after being freed of their engagement with the ground to protect the harrow teeth against damage and breakage due to this otherwise sudden reactive backward movement of the teeth once freed of the ground.
It is another object of the invention to provide a novel dampener to dampen or cushion the reactive action of harrow teeth upon being freed of their engagement with the ground after flexing to a biased position upon their engagement with the ground with the dampener acting to ease their sudden release from their engagement with the ground when the teeth are removed from the ground.
It is another object of the invention to provide a novel drum support for a plurality of harrow teeth that enables harrow teeth to evenly be removed from the drum to widen the spacing between the teeth upon the teeth engagement with the ground.
It is another object of the invention to provide a novel dampening coil spring member to be mounted to harrow teeth to bias the teeth in opposition to the coil spring biasing action of the teeth so that when the teeth are flexed in one direction due to a force against the teeth in that direction and then are otherwise suddenly free of the force action and are free otherwise to spring back suddenly and sharply to their normal position; the dampening coil spring member acts to counteract, slow and cushion the suddenness of the springing back action of the harrow teeth by providing a biasing action in opposition to the biasing action of the coiled portion of the teeth.
Further objects and advantages of the invention will become apparent as the description proceeds and when taken in conjunction with the accompanying drawings wherein:
REFERENCES:
patent: 2020524 (1935-11-01), Smithburn
patent: 2366624 (1945-01-01), Kelsey
patent: 3945441 (1976-03-01), Van der Lely et al.
Kleve Robert E.
Novosad Christopher J.
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