Patents by Inventor Ronald J. Calvert

Ronald J. Calvert 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).

  • Clothes hoist elevating means
    Patent number: 4236419
    Abstract: In a clothes hoist the fixed lower standard contains an aperture over which is secured a cover containing a bearing in which a driven shaft is journalled. The shaft has a handle on its outer end and a driving pinion on its inner end which meshes with a toothed nut supported by an abutment block within the fixed lower standard. The toothed nut threadably engages the worm which supports the lower end of the elevating standard such that rotation of the handle raises the worm in turn raising the standard.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: December 2, 1980
    Assignee: Hills Industries Limited
    Inventor: Ronald J. Calvert
  • Angle meshing gear
    Patent number: 4167127
    Abstract: In lieu of a pair of bevel gears which mesh to rotate about axes inclined to one another, each gear is carried on a cylindrical base having a boss extending from one end and co-axial with the base. Each tooth is integral with both the base and the boss and the adjacent walls of adjacent teeth are parallel for portion of their respective lengths such that the teeth are bulbous. Point engagement exists between the teeth. For a given pair of gears the angle between the axis of rotation can be widely varied.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: September 11, 1979
    Assignee: Hills Industries Limited
    Inventor: Ronald J. Calvert