By a News Reporter-Staff News Editor at Politics & Government Week — A patent application by the inventors Hayashi, Mitsuaki Kawasaki, JP; Saito, Osamu Kawasaki, JP; Takano, Wataru Osaka, JP; Izuno, Takaharu Kawasaki, JP; Joko, Kenji Yokohama, JP; Matsumoto, Hideaki Yokohama, JP; Shirakami, Takashi Kawasaki, JP; Fujii, Minoru Kawasaki, JP, filed on October 14, 2013, was made available online on June 19, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.
This patent application is assigned to Fujitsu Limited.
The following quote was obtained by the news editors from the background information supplied by the inventors: “A spring washer having a spring property is known as a member that suppresses loosening of a fastener such as a screw or bolt. The loosening of the fastener is suppressed by widening the gap between the bearing surface of the fastener and the bearing surface of a member to be fastened by the spring property of the spring washer. The spring washer is usually a plain washer split at one point and twisted out of shape so that it has a spring property. The spring washer is crushed between the bearing surface of the fastener and the bearing surface of the member to be fastened, and the spring property is thereby exerted.(…)
via “Sprung Washer and Fixing Device” in Patent Application Approval Process.