Patents by Inventor William H. C. Bartlett

William H. C. Bartlett 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).

  • Articulated conduit joint
    Patent number: 5971652
    Abstract: An articulated conduit joint (8) includes first and second arms (10, 12), defining first and second passages (106), pivotally coupled by a main clutched joint (14) for movement of the arms about a joint pin (78) defining a first axis (20). The main clutched joint includes a generally open central portion (70) located between first and second end portions (72, 74). Clutch plates (82, 84) in the first end portion are alternately keyed to the first end portion and the joint pin. A compression spring (100) within the second end portion biases the joint pin along the first axis and forces the clutch plates against one another. The first and second end portions are integral with the first and second arms so that relative pivotal movement of the arms about the first axis is frictionally resisted by the clutch plates sliding against one another. One or both of the arms may include a hollow arm extension (22) housed within an arm body (16) for movement about a second axis (24) passing along the passage within the arm.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: October 26, 1999
    Inventors: William H.C. Bartlett, Donald J. Brockhage
  • Articulated conduit joint
    Patent number: 5820287
    Abstract: An articulated conduit joint (8) includes first and second arms (10, 12), defining first and second passages (106), pivotally coupled by a main clutched joint (14) for movement of the arms about a joint pin (78) defining a first axis (20). The main clutched joint includes a generally open central portion (70) located between first and second end portions (72, 74). Clutch plates (82, 84) in the first end portion are alternately keyed to the first end portion and the joint pin. A compression spring (100) within the second end portion biases the joint pin along the first axis and forces the clutch plates against one another. The first and second end portions are integral with the first and second arms so that relative pivotal movement of the arms about the first axis is frictionally resisted by the clutch plates sliding against one another. One or both of the arms may include a hollow arm extension (22) housed within an arm body (16) for movement about a second axis (24) passing along the passage within the arm.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: October 13, 1998
    Inventors: William H. C. Bartlett, Donald J. Brockhage