US 11,654,067 B2
Mobility aid
Christopher Patrick Harper, NSW (AU); David Charles Thompson, NSW (AU); Arthur David Cooper, NSW (AU); and Thomas Maurice Fleming, NSW (AU)
Assigned to Easy and Light Mobility Pty Ltd, Sydney (AU)
Appl. No. 15/765,339
Filed by EASY AND LIGHT MOBILITY PTY LTD, Sydney (AU)
PCT Filed Oct. 4, 2016, PCT No. PCT/AU2016/000338
§ 371(c)(1), (2) Date Apr. 2, 2018,
PCT Pub. No. WO2017/054034, PCT Pub. Date Apr. 6, 2017.
Claims priority of application No. 2015904021 (AU), filed on Oct. 2, 2015.
Prior Publication US 2018/0280220 A1, Oct. 4, 2018
Int. Cl. A61G 7/10 (2006.01)
CPC A61G 7/1017 (2013.01) [A61G 7/1048 (2013.01); A61G 7/1061 (2013.01); A61G 7/1067 (2013.01); A61G 2203/72 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A mobility aid assembly for lifting and lowering a user comprising an articulated lifting arm releasably mounted to a base structure, wherein:
a first portion of the lifting arm is operable between a lowered position and a raised position by a linear actuator;
a first end of the linear actuator is configured to remain attached and pivotally connected to the first portion of the lifting arm; and,
a second end of the linear actuator is provided with a mounting boss, the mounting boss is provided with a first connecting element for releasable connection to a complementary second connecting element provided on a second, fixed upright portion of the lifting arm, the first connecting element comprises a transverse U-shaped slot having parallel sides and the complementary second connecting element comprises a transverse pin, wherein the second end of the linear actuator is positioned to slidingly engage the transverse U-shaped slot with the transverse pin to slidingly releasably mount the second end of the linear actuator on the complementary second connecting element so as to avoid injury to the user if the linear actuator moves the first portion of the lifting arm to an excessively lowered position in which the first portion of the lifting arm impinges on the user, and wherein the second end of the linear actuator disengages from the complementary second connecting element when an upward force acting on the first portion of the lifting arm exceeds the combined weight of the first portion of the lifting arm and that of the linear actuator.
 
7. A method of avoiding injury to a user of a disability aid assembly if a first articulated portion of a lifting arm of the assembly is lowered by a linear actuator of the assembly to a point at which the first articulated portion is driven into contact with the user by retraction of the linear actuator, the method comprising the steps of:
slidably engaging a transverse U-shaped slot located on a lower end of the linear actuator with a transverse pin located on a second, fixed upright portion of the lifting arm; wherein an outer end of the linear actuator is configured to remain attached and pivotally connected to the first articulated portion of the lifting arm; and
disengaging the lower end of the linear actuator from the second, fixed portion of the lifting arm when a force cannot exceed a combined weight of the articulated portion of the lifting arm and the linear actuator.