Patents by Inventor Markku Penttila

Markku Penttila 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/fire damper for ducts inventilation installations
    Patent number: 4625626
    Abstract: The control/fire damper (10) comprises a tubular shell (11) constituting a flow duct (12), a shaft (13) disposed within the flow duct (12) and carried by the shell (11), and a closing plate (14) mounted on the shaft (13), and which in the case of fire damper use continuously tends to close under the action of a spring (17). The control/fire damper (10) is provided with a clamping counterpart (15) attached to the closing plate (14) and with a clamping device (16) passing through the shell (11), which fixes the counterpart (15) steplessly in the position which is desired in each instance. The clamping device (16) consists of a clamping screw and, in fire damper use, of a member attached by fuse material to the end of the clamping screw.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: December 2, 1986
    Assignee: Halton Oy
    Inventors: Arvo Aalto, Erkki Aalto, Juhani Hasa, Markku Penttila, Harri Saukkonen, Arvi Tolmunen