Patents by Inventor Bruno Crabbi

Bruno Crabbi 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 renewing a road surface of bituminous mix, with cold application of the recycled covering material
    Patent number: 4974993
    Abstract: A method for renewing a road surface based on bituminous mix and granular mix, comprising removing the road surface to be replaced, by scarifying; collecting the removed material and conveying it to devices for screening and crushing to predetermined particle size, and then to a mixer where aqueous bitumen emulsion is added, the mixture obtained being recycled directly to form the new road surface by depositing and levelling the mixture after spraying bitumen emulsion, and finally rolling the road surface thus formed. A self-propelled machine for implementing said operations is also provided.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: December 4, 1990
    Assignee: Wirtgen Macchine S.r.l.
    Inventor: Bruno Crabbi