Patents by Inventor Giovanni B. Razelli

Giovanni B. Razelli 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).

  • Differential device of the limited slip type
    Patent number: 4916978
    Abstract: The device comprises first and second planet wheels having a common axis, first and second pairs of first satellite gear wheels meshing respectively with the first and second planet wheels, the two gear wheels of each of the said pairs being rotatable on a differential housing coaxial with the planet wheels and having axes lying respectively in first and second planes orthogonal to one another and passing through the first-mentioned said common axis; the device further includes two pairs of second satellite gear wheels also rotatable on the differential housing and having axes lying in the same plane orthogonal to the first and second first-defined planes, each of the second satellite gear wheels meshing simultaneously with one of the said first satellite gear wheels belonging to the first pair and with one of the said first satellite gear wheels belonging to the second pair in such a way that drive can be transmitted from one of the said first satellite gear wheels of one of the said pairs simultaneously to
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: April 17, 1990
    Assignees: Ferrari Engineering S.p.A., Piaggio & C. S.p.A.
    Inventors: Giovanni B. Razelli, Piero Buoncristiani