Patents by Inventor John R. Fletcher

John R. Fletcher 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).

  • Publication number: 20120211177
    Abstract: Insulated tracks for use with loading dock doors are disclosed herein. In one embodiment, an insulated door track configured in accordance with the present disclosure includes a first insulator, such as a plastic material, applied to a surface of the door track that extends adjacent to the loading dock door in the closed position. A second insulator, such as a radiant barrier comprised of a thin film of a reflective material, such as aluminum, can be applied to an opposing surface of the first insulator to prevent or at least reduce radiant energy losses through the track. A gap between the first insulator and the door jamb can be sealed with a third insulator, such as a suitable strip of foam.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 23, 2012
    Applicant: 4Front Engineered Solutions, Inc.
    Inventors: John R. Fletcher, Milena D. Vohla, Carlo G. Mascari
  • Patent number: 5105545
    Abstract: An apparatus for measuring the width dimension of a helical surface of an endmill. The apparatus includes a workholder capable of supporting an endmill in such a position as to optically magnify the surface of the endmill to be measured. The workholder further includes an index arbor capable of rotating the endmill to a selected helical surface. The workholder is slidably connected to an arcuate guidetrack mounted on a microscope platform.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: April 21, 1992
    Assignee: The Boeing Company
    Inventor: John R. Fletcher