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:
Jul. 21, 1992
Filed:
Aug. 27, 1990
Terrence M Drew, Boulder, CO (US);
Chris A Hanson, Boulder, CO (US);
Alden B Hanson, Boulder, CO (US);
Alden Laboratories, Inc., Boulder, CO (US);
Abstract
A self-reinitializing padding device having at least two fluidly connected chambers which contain flowable material for use in applications where it is desirable to reinitialize the padding device for subsequent use in absorbing and/or distributing impact forces. One application for which the padding device is particularly well suited is as a foot padding device in footwear. In this application, the device provides improved absorption and distribution of impact forces generated when the footwear contacts a surface, as well as improved lateral support for the foot. In a preferred embodiment, a primary chamber is positioned under the area to be padded, and a plurality of secondary chambers, each fluidly connected to the primary chamber, are positioned around the padded area. The impact force of the user's foot deforms the primary chamber, thereby forcing some of the flowable material contained therein to flow into the secondary chambers. The rate of deformation of the primary chamber exceeds the flow rate into the secondary chambers, thereby providing a cushioning effect. When the portion of the footwear coinciding with the primary chamber loses contact with the ground, the force is removed from the primary chamber, thereby allowing the secondary chambers to contract and force some of the flowable materials contained therein back into the primary chamber to reinitialize the padding device.