Multinozzle spraying attachments for grain drills and other seeding implements

Claim 2

In multinozzle spraying attachments for seeding implements such as grain drills and corn planters which employ tank means for spray liquid storage and manifold means connected with said tank means, and a plurality of nozzle heads connected with said manifold for supply of spray liquid to said heads, together with a pump unit driven from a rotary element such as a wheel of the implement, to generally synchronize quantity flow of liquid delivered with travel speed of the implement over the ground, those improvements in the construction of the nozzle heads and nozzles which comprise; a generally cylindrical chamber defined interiorly of said nozzle head; distended filter means disposed within said chamber and including passage means for delivering filtered liquid to a liquid passage; a valve seat forming, rigid member having a lower exterior portion of semispherical configuration and having liquid port means extending tHerethrough in communication with said liquid passage; a pressure-responsive valve element constructed of flexible, elastic material conforming in shape to said seat-forming, rigid member and being at least lightly tensioned and of an area to not only cover said liquid port means but also to contact and seal with a substantial area of said rigid member surrounding said port means; said valve element being stretchable and deformable when liquid pressure through said valve passage exceeds a predetermined value, thereby permitting discharge flow of spray liquid around an edge of said valve element; and means communicating said discharged flow of liquid to the upper end of a depending nozzle discharge tube.

Claim 3

The structure set forth in claim 1, and foraminous retaining means pressing upwardly against the under side of said valve element but nevertheless leaving the central portion of said valve element exposed for discharge stretching when the pressure of liquid communicated through said port means exceeds a predetermined level.

Claim 4

In multinozzle spraying attachments for seeding implements such as grain drills and corn planters which employ tank means for spray liquid storage and manifold means connected with said tank means, and a plurality of nozzle heads connected with said manifold together with a pump unit to supply spray liquid to said nozzle heads through said manifold, those improvements in the construction of the nozzle heads and nozzles which comprise: a generally cylindrical chamber defined interiorly of said nozzle head; distended filter means disposed within said chamber and including passage means for delivering filtered liquid to a liquid passage, said filter means being in cylindrical form; an upstanding rigid thimble having means spaced longitudinally on the outer surface thereof engaging and distending said cylindrical filter means; communication passages for communicating filtered liquid within said screen to the interior of said thimble; a passage-forming cylindrical rod mounted concentrically within said thimble and having a generally axial passage communicating with said communication passages, the exterior of said rod having at least the lower portion thereof formed to define a cylindrical, valve seat forming surface of substantial area; at least one liquid port communicating said axial passage within said rod with the exterior of said rod; a pressure-responsive valve element constructed of flexible, elastic material in the form of a tubular sleeve telescoped over said cylindrical valve seat forming surface on said rod, said valve element being at least lightly tensioned and of an area to not only cover said liquid port but also to contact and seal with a substantial area of said cylindrical valve seat forming surface surrounding said liquid port; said valve element being stretchable and deformable when liquid pressure through said valve passages exceeds a predetermined value, thereby permitting discharge flow of spray liquid around an edge of said valve element; and means communicating said discharge flow of liquid to the upper end of a depending nozzle discharge tube.

Claim 5

In multinozzle spraying attachments for seeding implements such as grain drills and corn planters which employ tank means for spray liquid storage and manifold means connected with said tank means, and a plurality of nozzle heads connected with said manifold together with a pump unit to supply spray liquid to said nozzle heads through said manifold, those improvements in the construction of the nozzle heads and nozzles which comprise: a generally cylindrical chamber defined interiorly of said nozzle head; distended filter means disposed within said chamber and including passage means for delivering filtered liquid to a liquid passage, said filter means being in cylindrical form; an upstanding rigid thimble having means spaced longitudinally on the outer surface thereof engaging and distending said cylindrical filter means; communication passages for communicating filtered liquid within said screen to the interior of said thimble; a passage-forming cylindrical rod mounted concentrically within said thimble and having a generally axial passage communicating with said communication passages, the exterior of said rod having at least the lower portion thereof formed to define a cylindrical, valve seat forming surface of substantial area; at least one liquid port communicating said axial passage within said rod with the exterior of said rod; a pressure-responsive valve element constructed of flexible, elastic material in the form of a tubular sleeve telescoped over said cylindrical valve seat forming surface on said rod, said valve element being at least lightly tensioned and of an area to not only cover said liquid port but also to contact and seal with a substantial area of said cylindrical valve seat forming surface surrounding said liquid port; said valve element being stretchable and deformable when liquid pressure through said valve passages exceeds a predetermined value, thereby permitting discharge flow of spray liquid around an edge of said valve element; and means communicating said discharge flow of liquid to the upper end of a depending nozzle discharge tube.

Claim 6

In multinozzle spraying attachments for seeding implements such as grain drills and corn planters which employ tank means for spray liquid storage and manifold means connected with said tank means, and a plurality of nozzle heads connected with said manifold together with a pump unit to supply spray liquid to said nozzle heads through said manifold, those improvements in the construction of the nozzle heads and nozzles which comprise: a generally cylindrical chamber defined interiorly of said nozzle head; distended filter means disposed within said chamber and including passage means for delivering filtered liquid to a liquid passage, said filter means being in cylindrical form; an upstanding rigid thimble having means spaced longitudinally on the outer surface thereof engaging and distending said cyliNdrical filter means; communication passages for communicating filtered liquid within said screen to the interior of said thimble; a passage-forming cylindrical rod mounted concentrically within said thimble and having a generally axial passage communicating with said communication passages, the exterior of said rod having the lower portion thereof formed to define an enlarged, semispherical, valve seat forming surface through which said axial passage extends; at least one liquid port communicating said axial passage within said rod with the exterior of said rod through said semispherical valve seat forming surface; a pressure-responsive valve element constructed of flexible, elastic material conforming in shape to said semispherical valve seat forming surface and snugly fitting against a large proportion of the exterior area thereof in sealing contact therewith around said liquid port; said valve element being stretchable and deformable under liquid pressure through said valve passage exceeding a predetermined value, thereby permitting discharge flow of spray liquid around an edge of said valve element; and means communicating said discharged flow of liquid to the upper end of a depending nozzle discharge tube.

Claim 7

In multinozzle spraying attachments for seeding implements such as grain drills and corn planters which employ tank means for spray liquid storage and manifold means connected with said tank means, and a plurality of nozzle heads connected with said manifold together with a pump unit to supply spray liquid to said nozzle heads through said manifold, those improvements in the construction of the nozzle heads and nozzles which comprise: a generally cylindrical chamber defined interiorly of said nozzle head; distended filter means disposed within said chamber and including passage means for delivering filtered liquid to a liquid passage, said filter means being in cylindrical form; an upstanding rigid thimble having means spaced longitudinally on the outer surface thereof engaging and distending said cyliNdrical filter means; communication passages for communicating filtered liquid within said screen to the interior of said thimble; a passage-forming cylindrical rod mounted concentrically within said thimble and having a generally axial passage communicating with said communication passages, the exterior of said rod having the lower portion thereof formed to define an enlarged, semispherical, valve seat forming surface through which said axial passage extends; at least one liquid port communicating said axial passage within said rod with the exterior of said rod through said semispherical valve seat forming surface; a pressure-responsive valve element constructed of flexible, elastic material conforming in shape to said semispherical valve seat forming surface and snugly fitting against a large proportion of the exterior area thereof in sealing contact therewith around said liquid port; said valve element being stretchable and deformable under liquid pressure through said valve passage exceeding a predetermined value, thereby permitting discharge flow of spray liquid around an edge of said valve element; and means communicating said discharged flow of liquid to the upper end of a depending nozzle discharge tube.