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:
Jun. 06, 2017
Filed:
Dec. 30, 2015
Stryker Corporation, Kalamazoo, MI (US);
Anish Paul, Portage, MI (US);
Matthew A. Cutler, Portage, MI (US);
Tyler Joseph Ethen, Portage, MI (US);
Christopher S. Hough, Kalamazoo, MI (US);
Stryker Corporation, Kalamazoo, MI (US);
Abstract
A chair includes a backrest that pivots with respect to the seat in a manner that improves the occupant's experience during the transition from an upright position to a reclined position. During pivoting of the backrest with respect to the seat, the backrest moves in a manner having an instantaneous center of rotation that does not remain stationary during the pivoting of the backrest. In some embodiments, the instantaneous center of rotation begins at a location lower than a height of the seat and moves backward as the backrest pivots from the upright position to the reclined position. The movement of the instantaneous center of rotation follows a smoothly curved path that has a continuous first derivative and, in some embodiments, continuous higher order derivatives as well. The movement may be effectuated via pins coupled to the backrest that ride in smoothly curved channels defined in a seat frame.