Patents by Inventor Marco Rojas

Marco Rojas 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).

  • Patent number: 5031835
    Abstract: Disclosed is an improved sprinkler arm rotatable in and out of a stream of water. In particular, the reaction surface of a sprinkler arm's spoon is improved to direct more water close to the sprinkler. The reaction surface in the preferred embodiment is provided at least one groove which directs some of the water downward from the rest of the water exiting the reaction surface. An alternate embodiment employs at least one pin in the reaction surface instead of or in combination with at least one groove. The improved spoon applies more water near the sprinkler ("enclosed water") without interfering with maximum distance of the water when the arm is rotated out of the stream ("canon shot").
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: July 16, 1991
    Assignee: Western Brass Works
    Inventor: Marco Rojas
  • Patent number: 4278035
    Abstract: A seedling planter consisting of a portable frame on which is mounted a horizontally rotatable, vertically movable index plate carrying a vertically movable, normally lowered scraper blade, a telescopic seedling drop tube, an auger, an auger hydraulic motor and a gear box coupling the motor to the auger. A carousel tray containing seedlings is rotatably mounted on the frame over the index plate, being rotatable stepwise by a pawl on the end of the piston rod of a retraction-extension hydraulic cylinder mounted on the frame.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: July 14, 1981
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Teddy L. Pickett, Isidro D. Ignacio, Marco Rojas