US 10,376,431 B2
Wheelchair
Douglas G. Robins, Hermosa Beach, CA (US)
Filed by Douglas G. Robins, Hermosa Beach, CA (US)
Filed on Sep. 18, 2017, as Appl. No. 15/707,843.
Application 15/707,843 is a continuation of application No. 15/341,477, filed on Nov. 2, 2016, granted, now 9,770,376.
Application 15/341,477 is a continuation of application No. 14/592,751, filed on Jan. 8, 2015, granted, now 9,486,372, issued on Nov. 8, 2016.
Claims priority of provisional application 61/925,185, filed on Jan. 8, 2014.
Prior Publication US 2018/0021192 A1, Jan. 25, 2018
Int. Cl. A61G 5/02 (2006.01); A61G 5/04 (2013.01); A61G 5/12 (2006.01)
CPC A61G 5/041 (2013.01) [A61G 5/02 (2013.01); A61G 5/021 (2013.01); A61G 5/023 (2013.01); A61G 5/024 (2013.01); A61G 5/025 (2013.01); A61G 5/048 (2016.11); A61G 5/12 (2013.01); A61G 5/121 (2016.11); A61G 5/125 (2016.11); A61G 5/128 (2016.11)] 10 Claims
OG exemplary drawing
 
1. An expandable support device extendable above a top of a seat of a wheelchair to provide back and/or head support to a user, comprising:
at least one vertical support member which is vertically movable relative to said seat and biased upward relative to said seat of said wheelchair;
a plurality of horizontal support members connected to said at least one vertical support member; at least some of said plurality of horizontal support members being vertically moveable along said at least one vertical support member;
one or more linkage members contacting at least two of said plurality of horizontal support members and limiting a maximum distance each of said plurality of horizontal support members can vertically move away from each other; and
a restraining member restraining said expandable support device from a fully extended position downward towards said seat to a retracted position;
wherein said plurality of horizontal support members are spaced apart in said fully extended position and wherein said plurality of horizontal support members are positioned adjacent each other in said retracted position.