Seeding machine with sensor controlled planting at predetermined

Details Seeding machine with sensor controlled planting at predetermined Seeding machine with sensor controlled planting at predetermined

1997-04-02

1998-08-04

Melius, Terry Lee

Planting

Drilling

Having depositor feature

111170, 111200, 111278, 221 13, 221211, 221278, 222 61, A01C 700

Patent

active

057878250

ABSTRACT:
A seeding machine comprises: an air compressor for generating a positive air pressure; a soil hardness sensor for measuring soil hardness so as to produce a control signal to adjust the positive air pressure generated by the compressor; an air pressure adjuster for adjusting the positive air pressure generated by the air compressor in accordance with the control signal produced by the soil hardness sensor; a negative air pressure generator for generating a negative air pressure by making use of air under the positive air pressure; a change-over valve for effecting a change-over operation between the positive air pressure and the negative air pressure, so as to selectively supply the positive air pressure or the negative air pressure; a seed adsorber for catching a seed by virtue of the negative air pressure; a first air cylinder adapted to extend or contract by the positive air pressure, to cause a certain reciprocating movement of the seed adsorber; a second air cylinder adapted to extend or contract by the positive air pressure, to cause a reciprocating movement of the seed adsorber between a seed catching position and a seed ejecting position.

REFERENCES:
patent: 4031963 (1977-06-01), Poggemiller et al.
patent: 4072251 (1978-02-01), Huang
patent: 4106414 (1978-08-01), Vastag
patent: 4432675 (1984-02-01), Machnee
patent: 4899672 (1990-02-01), Paul
patent: 5067421 (1991-11-01), Andersson
patent: 5189965 (1993-03-01), Hobbs et al.
patent: 5247761 (1993-09-01), Miles et al.
patent: 5255618 (1993-10-01), Berry

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