Patents by Inventor William J. Zehr

William J. Zehr 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).

  • Fire extinguisher discharge station
    Patent number: 4182384
    Abstract: A method and means for removing the fire extinguisher dry powder from its pressurized cylinder using a vacuum pump and appropriate apparatus and collecting the powder in a drum and to prevent powder degradation. The apparatus is simple to operate and provides a clean, fast method for discharging and removing dry chemical powder from fire extinguisher cylinders.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: January 8, 1980
    Assignee: The Protectoseal Company
    Inventor: William J. Zehr
  • Tilt can
    Patent number: 4138037
    Abstract: A tilt can or container for pouring flammable liquids having means for simultaneously venting the can when opening the pouring spout.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: February 6, 1979
    Assignee: The Protectoseal Co.
    Inventor: William J. Zehr
  • Fire extinguisher cylinder filling station
    Patent number: 4121632
    Abstract: A compact filling station for fire extinguisher cylinders wherein the cylinder is weighed as the fire extinguishing material is fed therein to determine the correct quantity in said cylinder and said cylinder is filled by using a vacuum.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: October 24, 1978
    Assignee: The Protectoseal Company
    Inventor: William J. Zehr
  • Rupturing head for fire extinguishers
    Patent number: 4006780
    Abstract: A device for rupturing a pressurized cylinder containing a fire extinguishing product wherein when the temperature is high enough to melt the fusible link, it will cause a spring-loaded punch to forcibly propel the punch downwardly to rupture a rupturable disk in the cylinder to allow the contents to be ejected therefrom.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: February 8, 1977
    Assignee: The Protectoseal Company
    Inventor: William J. Zehr
  • Rupturing head for fire extinguishers
    Patent number: RE29614
    Abstract: A device for rupturing a pressurized cylinder containing a fire extinguishing product wherein when the temperature is high enough to melt the fusible link, it will cause a spring-loaded punch to forcibly propel the punch downwardly to rupture a rupturable disk in the cylinder to allow the contents to be ejected therefrom.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: April 18, 1978
    Assignee: The Protectoseal Co.
    Inventor: William J. Zehr