Patents by Inventor Boyd C. Robertson, Jr.

Boyd C. Robertson, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Seed planter with a suction pickup mechanism
    Patent number: 4019651
    Abstract: A seed pickup mechanism for a vacuum wheel type seed planter including provision for arranging the seeds into a relatively thin stable seedbed which is suitably carried through a seed pickup chamber at a spaced distance below the vacuum wheel. The stable seedbed is converted into an unstable or fluidal state as it passes through the seed pickup chamber by an upwardly directed blast of air which is effective to expand the seedbed or slightly lift and separate the seeds thus the seeds are raised upwardly to facilitate engagement thereof with the vacuum wheel.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: April 26, 1977
    Assignee: Floyd R. Bridger, Jr.
    Inventors: George N. Starr, Boyd C. Robertson, Jr.