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:
Aug. 13, 1991
Filed:
Oct. 25, 1989
David E Young, Watlington, GB;
Kenneth P Davis, Hillington, GB;
Protectair Limited, Abingdon, GB;
Abstract
An orthopedic and orthotic hinge having a hinge body that includes two spaced, parallel plates with two hinge arm carriers having end portions pivotally mounted between the plates for movement in directions of flexion and extension. The end portions of the hinge arm carriers have peripheral teeth that respectively engage two toothed slide members. Such members are slidably disposed between the plates, preferably carried in grooves formed therein, and are independently movable with respect to each other when the hinge arm carriers are pivoted. First and second variable stops are provided by the hinge for limiting the extent of sliding movement in opposite directions of the two slide members, thereby restricting extension and flexion of the hinge arm carriers while at the same time permitting true bi-pivotal operation of the hinge. In one embodiment, the variable stops are offset from the midplane of the hinge body and the toothed slide members have extensions engageable with such stops.