Article dispensing – With discharge assistant – Article adhering or gripping type
Patent
1979-04-18
1981-07-14
Knowles, Allen N.
Article dispensing
With discharge assistant
Article adhering or gripping type
111 77, 198689, A01C 1900, B65G 4736
Patent
active
042781833
ABSTRACT:
In a seeder for singulating wet seeds, a seed capture nozzle dips into a reservoir of seeds suspended in water, and captures a seed on the nozzle by means of suction applied to a suction tube. The nozzle then moves from the seed reservoir to a release location, and releases the seed by application of a pulse of water to a pressure tube. The suction tube and pressure tube meet at a junction in a conduit in the movable capture head. The suction is applied continuously to the pressure tube, and release of the seed is achieved by applying at the pressure tube a pulse of water under pressure sufficient to overcome the applied suction. In a preferred form a seed reservoir may include an inlet bore in the base of a well for supplying an upwardly directed jet of water in the seed suspension for carrying a stream of seeds upwardly toward the surface of the water. This produces a fountain of seeds at the surface and the nozzle captures a seed from a concentration of seeds at the tip of the fountain.
REFERENCES:
patent: 2812061 (1957-11-01), Pfister
patent: 3240175 (1966-03-01), Clow
patent: 3312341 (1967-04-01), Weinceke et al.
patent: 3406869 (1968-10-01), Cordova
patent: 3638393 (1972-02-01), Datta
patent: 3698332 (1972-10-01), McCallun
patent: 3700102 (1972-10-01), Higgins
patent: 4119242 (1978-10-01), Jesty
Knowles Allen N.
National Research Development Corporation
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