Patents by Inventor Roberto Weingrill

Roberto Weingrill 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).

  • Mounting arrangement for a key shaft in a musical instrument
    Patent number: 5299486
    Abstract: A mounting arrangement for the key shaft of a musical instrument which has a finger pad and a key attached to the shaft for operating a valve on the instrument when the finger pad is moved is herein disclosed. The mounting arrangement includes a bearing at each end of the shaft, a blind hole in each end of the shaft, an elongated tapered pin in each blind hole, a spring in each blind hole urging the respective pin outwardly, and a tapered bore in each bearing receiving the respective pin. Also, each bearing has an extension to the bore, forming a lubrication passage.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: April 5, 1994
    Assignee: Weril Instrumentos Musicais Ltd.
    Inventor: Roberto Weingrill