Patents by Inventor Lee W. Johnson

Lee W. Johnson 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).

  • Method of indexing a spring clutch
    Patent number: 4189039
    Abstract: Precise angular relationship between release means and driven means is attained in a coil spring clutch by means of a spring-positioning ring which is permanently secured to the driven hub only after being rotated into desired position.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: February 19, 1980
    Assignee: Reell Precision Manufacturing Corporation
    Inventor: Lee W. Johnson
  • Magnetic spring grip device
    Patent number: 3974902
    Abstract: An electromagnetically actuated clutch or the like having a helical spring disposed about the surface of a relatively rotatable drum, and an electromagnet with a fixed annular pole piece closely adjacent the free end coil of the spring. The spring is induced to grip the drum surface by the action of magnetic flux passing from the drum to the spring and thence directly to the polepiece.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: August 17, 1976
    Assignee: Reel Precision Maufacturing Corporation
    Inventors: Robert L. Wahlstedt, Robert F. Rasmussen, Lee W. Johnson