The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2009
Filed:
Dec. 18, 2007
Peter H Mott, Washington, DC (US);
Charles M Roland, Waldorf, MD (US);
Howard L Schrader, White Plains, MD (US);
Peter H Mott, Washington, DC (US);
Charles M Roland, Waldorf, MD (US);
Howard L Schrader, White Plains, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A high-speed tensile test device is disclosed, which measures the stress-strain behavior, up to failure, of polymeric materials, at high strains (as much as 1000%), and high strain rates (up to 10/s). A weight, when dropped down a vertical track, impacts two L-levers positioned below and on each side of the weight, pushing the horizontal arms of the L-levers. The L-levers have cable connected to the vertical arms of the L-levers and are looped around pulleys, then connected to shuttles located on a horizontal track. The shuttles are attached to load cells, which are connected to grips that hold a sample to be tested. When the horizontal arms of the L-levers are pushed by the weight, they pivot, causing the cables to pull on the shuttles, load cell, and grip, which move in an outward direction, stretching the sample.