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:
Dec. 05, 2023
Filed:
May. 29, 2020
Bruno Independent Living Aids, Inc., Oconomowoc, WI (US);
Allen Edward Brook, Waterford, WI (US);
Terrence E. O'Brien, Oconomowoc, WI (US);
Roy E. McDaniels, Jr., Watertown, WI (US);
Scott Martin Hall, Sussex, WI (US);
Eduard Jozef Marie Duijnstee, Ouderkerk aan den IJssel, NL;
BRUNO INDEPENDENT LIVING AIDS, INC., Oconomowoc, WI (US);
Abstract
A stairlift includes a rail and a carriage. The carriage includes a frame, a central drive unit mounted to the frame, the central drive unit including a drive motor and a drive gear, a yoke assembly pivotably mounted to the frame, and a first bogie unit attached to the yoke assembly and a second bogie unit attached to the yoke assembly, wherein each bogie unit includes a bogie socket mounted to the yoke assembly, and a bogie ball spherically pivotable within the bogie socket, the bogie ball including a plurality of bogie ball rollers configured to hold the bogie ball to the rail, and further wherein the plurality of bogie ball rollers are configured to maintain the bogie ball in a generally perpendicular travel orientation relative to the rail.