Patents by Inventor Leonard Stanley Ackerman

Leonard Stanley Ackerman 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).

  • Over running clutch
    Patent number: 4116314
    Abstract: An over running clutch having a ball that wedges against the interior of a circular race to move a pawl into engagement with a ratchet.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: September 26, 1978
    Inventor: Leonard Stanley Ackerman
  • Variable speed device
    Patent number: 4047451
    Abstract: A variable speed device comprising a pair of discs driven from a source of power each disc having rack teeth forming its surface. The device including also a pinion in mesh with the rack teeth of each disc mounted to be movable radially of the disc to vary the speed of an output shaft in relation to the rotation of said disc.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: September 13, 1977
    Inventor: Leonard Stanley Ackerman
  • Expansible sprocket device
    Patent number: 3994180
    Abstract: In a variable diameter driving sprocket for a chain drive change speed device comprising a plurality of circumferentially spaced radially movable toothed elements mounted on said driving sprocket over which the chain is threaded; a means to move the toothed elements radially which includes an adjusting gear or sprocket coaxial with said driving sprocket but free to rotate with respect to said driving sprocket, and differential means drivingly connecting said adjusting sprocket to said variable diameter driving sprocket.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: November 30, 1976
    Inventor: Leonard Stanley Ackerman