US 12,350,207 B2
Lifting mechanism and chairs
Garrett W. Brown, Philadelphia, PA (US); and John Christopher Fawcett, Antrim (GB)
Assigned to Exokinetics, Inc.
Filed by Exokinetics, Inc., West Chester, PA (US)
Filed on Mar. 13, 2023, as Appl. No. 18/182,863.
Application 18/182,863 is a continuation of application No. 16/982,365, granted, now 11,602,469, previously published as PCT/US2019/023661, filed on Mar. 22, 2019.
Application 16/982,365 is a continuation in part of application No. 15/326,113, granted, now 10,842,706, issued on Nov. 24, 2020, previously published as PCT/US2015/040036, filed on Jul. 10, 2015.
Application PCT/US2019/023661 is a continuation in part of application No. PCT/US2017/060163, filed on Nov. 6, 2017.
Claims priority of provisional application 62/649,809, filed on Mar. 29, 2018.
Claims priority of provisional application 62/024,006, filed on Jul. 14, 2014.
Claims priority of provisional application 62/649,746, filed on Mar. 29, 2018.
Prior Publication US 2023/0210704 A1, Jul. 6, 2023
Int. Cl. A61G 5/14 (2006.01); A61G 5/10 (2006.01)
CPC A61G 5/14 (2013.01) [A61G 5/1059 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An adjustable lifting mechanism comprising:
a fixed base;
a parallelogram structure having four pivotally connected links having four pivots, the parallelogram connected at two of the four pivots to the base;
a spring pivotably extending from a first link of the parallelogram, with one end connected pivotably to a point on the first link and an opposite end pivotably connected to an adjustable termination point on a second of the four pivotally connected links of the parallelogram to form a lifting triangle, wherein the spring termination point is displaced from a main pivot of the parallelogram;
an extension in fixed relation to the second link of the four pivotally connected links forms a seat, wherein angles of the parallelogram are varied upon raising or lowering the lifting mechanism between a sitting mode and a standing mode;
a height adjustment sleeve associated with the second link, the height adjustment sleeve configured to slideably move up and down between the sitting mode and the standing mode, along a bar fixedly attached to the base, and
a lifting power adjustment mechanism configured to adjust the position of the spring termination point with respect to the main pivot.