Patents by Inventor Philip C. Larson

Philip C. Larson 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 restoring hydraulic systems
    Patent number: 4017329
    Abstract: A method of cleaning and replenishing vehicle hydraulic brake systems is provided which includes opening all of the bleeder screws at the outlet end of the brake system and allowing the old brake fluid to flow from the brake system. Liquid solvent dichlorodifluromethane is then injected into the brake system under pressure at the master cylinder and allowed to flow through the system and out the bleeder screws. As the solvent enters the brake system, it wil mix with any remaining brake fluid and water in the system and, upon vaporization, will remove the remaining brake fluid and water from the system. When the solvent is observed flowing out of the bleeder screws, the solvent is shut off at the master cylinder and the bleeder screws are closed. A vacuum is then applied to the brake system at the master cylinder to vaporize and remove any solvent trapped in the system and to remove all air from the system.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: April 12, 1977
    Inventor: Philip C. Larson