Patents by Inventor Michael Colvin Andrews

Michael Colvin Andrews 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).

  • CONSTANT-FORCE SPRING SYSTEMS
    Publication number: 20140027965
    Abstract: Adjustable constant force spring systems are disclosed. An adjustable constant-force spring system includes first and second rolled metal strips and a spool. The first strip is rolled around a first axis. The first strip has an inner end adjacent the first axis and an outer end configured for selective attachment to a load. The second strip is rolled around the first axis such that the second strip overlaps the first strip. The second strip has an inner end adjacent the first axis and an outer end configured for selective attachment to the load. The spool is located on a second axis parallel to and spaced from the first axis. The spool is sized to enable the first strip to reroll around the spool.
    Type: Application
    Filed: July 27, 2012
    Publication date: January 30, 2014
    Applicant: Ametek
    Inventors: Michael Holloway, Michael Colvin Andrews, Jonathan Michael Royer