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:
Sep. 06, 2022
Filed:
Jul. 03, 2018
Blatchford Products Limited, Hampshire, GB;
Mir Saeed Zahedi, London, GB;
Graham Harris, Hampshire, GB;
Stephen Terry Lang, Hampshire, GB;
Robert Michael Andrew Painter, Wokingham, GB;
David Moser, Hampshire, GB;
Blatchford Products Limited, Hampshire, GB;
Abstract
A prosthetic ankle has an ankle joint body (A) constituting a shin component and a foot component (). The ankle joint body (A) is pivotally connected to the foot component () by a first pivotal connection () defining a medial-lateral ankle joint flexion axis. The ankle joint body (A) also forms the cylinder of an ankle joint piston and cylinder assembly with a superior-inferior central axis, the cylinder housing a piston () with upper and lower piston rods (A,B). The lower piston rod (B) is pivotally connected to the foot component () at a second pivotal connection (). As the ankle joint body (A) pivots about the ankle joint flexion axis, the piston () moves substantially linearly in the cylinder formed by the ankle joint body. The cylinder is divided into upper and lower chambers (A,B). These chambers are linked by an hydraulic circuit () incorporating passages (A,B) in the ankle joint body (A), and an energy conversion device in the form of a slave piston and cylinder assembly () having a piston (P) and piston rods (R) which project beyond the cylinder (C) of the assembly ().