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. 07, 2026
Filed:
Aug. 15, 2022
Direct Supply, Inc., Milwaukee, WI (US);
Justin T. Morgan, Cedarburg, WI (US);
Anthony J. Patrick, Delafield, WI (US);
Shawn A. Ostendorf, Milwaukee, WI (US);
Direct Supply, Inc., Milwaukee, WI (US);
Abstract
The present invention provides an assembly having a wheelchair and a lift assembly to urge the seat surface upward with respect to the frame from a lowered position when supporting a seated individual during use to an elevated position with respect to the frame as to assist the individual during ingress or egress to or from the wheelchair. The lift assembly may include a mechanical linkage and an actuator assembly. The actuator assembly produced a nonlinear lift force having a first period exhibiting a first rate of amplitude increase when the seating surface is nearer the lowered position and a second period exhibiting a second rate of amplitude change that is less than the first rate of amplitude increase when the seating surface is nearer the elevated position.