Planting – Drilling and broadcasting – Main and auxiliary frame machines
Patent
1986-02-10
1987-07-07
Feyrer, James R.
Planting
Drilling and broadcasting
Main and auxiliary frame machines
111 91, A01C 2302
Patent
active
046779213
ABSTRACT:
A rolling point agricultural spiked wheel injector system for injecting a fluid as a liquid chemical or gas into the ground. The system includes a rotatable injector wheel having a plurality of outwardly directed injector spikes attached to the periphery of the wheel, the spokes being so constructed to easily penetrate the ground for injection of fluid therein. The injector wheel includes a unique rotary valve mechanism of simplistic design selectively operable for permitting fluid to flow when the spike is in the ground penetrating position and blocking the flow of fluid when the spike is out of the ground. The valve sealing system allows free rotation of the wheel with greater sealing pressure over a smaller contact area. The improved valve is a self-cleaning device for movement of abrasive particles in the liquid chemical material around the bearing face of the valve that engages the rotating ribbon surface of the ring with the plurality of openings. The abrasive material destroys the positive seal in the prior devices. In the present valve, the overall bearing surface between the axle and the bearing is not great or tight; it is machined with some space between axle and bearing surface. The tight, interfacial contact creating the valve seal has a very small surface area and, therefore, very little total friction and very little resistance to roll. The plug-like valve surface pressed against the smooth bearing surface creates a positive seal with very little friction.
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Article from Cooperative Extension Service, Iowa State University and Technology and the United States Department of Agriculture, distributed according to the Acts of Congress, May 8 and Jun. 30, 1914, "Schematic of Point-Injector Fertilizer Applicator".
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