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:
Apr. 24, 2001
Filed:
Apr. 22, 1996
William Henry Robinson, Eastbourne, NZ;
Damping Systems Limited, Auckland, NZ;
Abstract
An extrusion damper for interposing between two members to absorb energy of motion which may be induced between the two comprises an outer jacket (,) surrounding a body of plastically deformable energy absorbing material (,) such as lead and a shaft (,) which moves through the outer jacket to deform the lead during induced motion. The body of lead may be fixed relative to the outer jacket and the shaft has a portion of reduced diameter (,) which moves through the lead. Alternatively the body of lead may be fixed to the shaft and the outer jacket has a portion of enlarged diameter (,) through which the energy absorber passes. The body of energy absorbing material may optionally be subjected to approximately hydrostatic pressure preferably exceeding the shear yield stress of the energy absorbing material.