Patents by Inventor Marlin D. Crown

Marlin D. Crown 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: 4829794
    Abstract: The present invention relates in general to combination padlocks of the type which permit the user to reset the combination, and it relates in particular to a new and improved mechanism for preventing spurious or unintentional changing of the combination.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: May 16, 1989
    Assignee: National Manufacturing Co.
    Inventor: Marlin D. Crown
  • Patent number: 4784416
    Abstract: The lock button on a door latch is slidable in a horizontal direction between a retracted unlocking position and an extended locking position wherein it blocks a latch hook release member from unlatching the latch, prevents inadvertent locking of the door and extends alongside a strike shoulder on the associated door jamb to provide a secondary latch.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: November 15, 1988
    Assignee: National Manufacturing Co.
    Inventors: Marlin D. Crown, James R. Johnston
  • Patent number: 4732418
    Abstract: A door latch employs removable standoff posts in a concealed mounting, and a lockable latching mechanism which includes a locking slide manually actuatable from the inside of the door and movable from the locked to the unlocked position by a rotary cam member connected to a key-operated lock cylinder on the outside of the door with a forked one-piece operator shaft spanning the rotary cam member to interconnect the inside handle and the outside knob.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: March 22, 1988
    Assignee: National Manufacturing
    Inventors: Marlin D. Crown, James A. Edeus
  • Patent number: 4643469
    Abstract: A latch for use with a gate includes a latch body having a planar mounting surface on a rearward side thereof with a pair of space apart flanges which receive a bolt in openings thereto. The bolt is positioned parallel to the surface of the gauge and is slidably and rotatably disposed within the flange openings. An enlargement on one side of the bolt will allow the bolt to pass through one of the flanges when in a predetermined angular position for removal. However an offturned end of the bolt extends rearwardly of the mounting surface, and the bolt enlargement is so oriented such that the bolt is not removable from the latch body when the body is normally attached to the gate.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: February 17, 1987
    Assignee: National Manufacturing Co.
    Inventors: James R. Johnston, Marlin D. Crown