Patents by Inventor Barry A. Stunkel

Barry A. Stunkel 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).

  • Control device for power tools
    Patent number: 4085659
    Abstract: A powered tool control device having a pair of coaxial pistons, with the first piston effective to move the second piston after completing a predetermined amount of pretravel initiated by a prescribed operational condition of the powered tool and with resulting movement of the second piston controlled by fluid directional regulators responsive to different operational conditions of the powered tool.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: April 25, 1978
    Inventor: Barry A. Stunkel
  • Dual-solenoid safety valve
    Patent number: 4041842
    Abstract: A safety control valve for pneumatically operated cyclic machines, such as power presses and press brakes, including a pair of solenoid valves connected to a pneumatic pressure source and adapted to operate as a series flow when the system is on, and a parallel exhaust when the system is off, and with either of said solenoid valves blocking communication to the pneumatically operated cyclic machine when such valve is not operated.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: August 16, 1977
    Inventor: Barry A. Stunkel