US Patent 7614806 Damping system for mechanical shutter

Patent 7614806 was granted and assigned to VA on November, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7614806

Patent Inventor Names

Stephen Pasquarella0

Christopher Akuncius0

Helen Yan0

Date of Patent

November 10, 2009

Patent Application Number

10540969

Date Filed

July 17, 2003

Patent Primary Examiner

‌

Melissa J Koval

Patent abstract

A damping system for an electromagnetically operable rotary shutter includes a damper for arresting the motion of a pivotally supported shutter actuating drive arm. The damper has a first portion composed of an ultrahigh density polyethylene and a second portion composed of a damped polyurethane that are arranged to strike one against the other during operation of the shutter. Moreover the first portion of the damper has a straight edge and the second portion has a surface that is curved so as to maintain substantially a point contact between the two portions throughout the duration of the impact between the two. The combination of materials and configuration of the surfaces of the two portions provides energy absorption while avoiding the adherence of the two portions upon impact.