Patents by Inventor Frank Gerard Pirrallo

Frank Gerard Pirrallo 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).

  • Hold down spring for a drum brake
    Patent number: 6318515
    Abstract: A hold down spring for yieldably securing a drum brake shoe to a drum brake backing plate includes a nail that extends through apertures in the backing plate and in the brake shoe. A coil spring circumscribes the nail and urges a spring retainer slidable on the nail away from the brake shoe. The nail extends through an elongated slot in the retainer, which includes a wider portion which accepts an expanded end of the nail and a narrower portion which is narrower than the expanded end but wide enough to permit the nail to freely slide along the slot. The slot is inclined toward the brake shoe, so that the action of the spring tends to force the nail within the slot toward a seating area at one end of the slot.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: November 20, 2001
    Assignee: Delphi Technologies, Inc.
    Inventor: Frank Gerard Pirrallo