Sprayer marker

Details Sprayer marker Sprayer marker

1989-02-21

1989-11-28

Johnson, Richard J.

Earth working

With earth marker

172483, 172500, 172574, 172501, A01B 6902

Patent

active

048831271

ABSTRACT:
A field marker for attachment to a sprayer boom has an outer square tube clamped to the end of the spray boom. An inner square tube slides in the outer tube and is connected to it by a pair of coil springs that bias the inner tube downwardly. An hydraulic cylinder joins the inner and outer tubes as well and, when actuated, raises the inner tube against the biasing force of the springs. A marking disk is mounted on the bottom end of the inner tube, preferably with an adjustable mounting to accommodate booms of different heights.

REFERENCES:
patent: 558335 (1896-04-01), Adkins
patent: 1103101 (1914-07-01), Thompson
patent: 1389491 (1921-08-01), Coons
patent: 2747494 (1956-05-01), Rasmussen
patent: 3707132 (1972-12-01), Hansen
patent: 4011914 (1977-03-01), Elmer
patent: 4117889 (1978-10-01), Larson
patent: 4280563 (1981-07-01), Crow
patent: 4526236 (1985-07-01), Jacobsen
patent: 4674578 (1987-06-01), Bexten

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