Patents by Inventor Jean-Guy Dufour

Jean-Guy Dufour 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: 5683055
    Abstract: A line reel includes a housing, a spool rotatably mounted in the housing, a crank and crown gear assembly rotatably disposed in the housing and a pinion located in the housing in meshed engagement with the crank and crown assembly for rotation therewith. A release button movable into and out of meshed engagement with the spool is slidably mounted on the pinion and keyed thereto for rotation therewith. A spring is disposed between the pinion and the release button for selectively allowing locking and unlocking of the spool without movement of the crank and crown gear assembly.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: November 4, 1997
    Assignee: Johnson Level & Tool Mfg. Co., Inc.
    Inventor: Jean Guy Dufour
  • Patent number: 5659967
    Abstract: A line level comprises a hollow housing having a pair of end portions and a sight opening formed therein. A liquid level indicator has a pair of closed end walls and is observable through the sight opening is slidably received in the housing. A line engaging retainer arrangement is slidable into an interference fit in each of the open end portions of the housing and is engageable with each of the closed end walls of the liquid level indicator for maintaining the position of the liquid level indicator relative to the sight opening in the housing.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: August 26, 1997
    Assignee: Johnson Level & Tool Mfg. Co., Inc.
    Inventor: Jean-Guy Dufour
  • Patent number: 5044805
    Abstract: A mechanical pencil made of a molded plastics material has a flat rectangular cross-section and a slot at one end thereof for passing a flat lead piece. The housing has a front wall provided with a recess and a slot extending longitudinally of the housing in the recess. A pair of toothed racks are provided longitudinally of the housing in the chamber formed therein. A gripper including a thumb-operated slider is provided on the front wall which is bowed and urged against the front wall and is connected to a toothed anchor in the chamber which in turn is adapted to engage the rack members. A pair of bifurcated fingers are connected to the anchor member and the bifurcated fingers engage the lead piece. Cam guide means provide the gripping action of the bifurcated fingers and the releasing action thereof. The gripper is advanced and retracted by depressing the bowed slider to disengage the toothed anchor from the rack member.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: September 3, 1991
    Assignee: Steve Kosteniuk
    Inventors: Steve Kosteniuk, Jean-Guy Dufour