US 11,866,301 B2
Folding system for stairlift
Paul Kasbergen, Capelle aan den IJssel (NL); Maarten Dubbeld, Barendrecht (NL); Sjaak Wisse, Krimpen aan den Ijsssel (NL); and Matt Rebel, Rotterdam (NL)
Assigned to TK HOME SOLUTIONS B.V., Krimpen aan den IJssel (NL)
Appl. No. 17/998,335
Filed by TK Home Solutions B.V., Krimpen aan den IJssel (NL)
PCT Filed May 18, 2021, PCT No. PCT/EP2021/063103
§ 371(c)(1), (2) Date Nov. 9, 2022,
PCT Pub. No. WO2021/239506, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 20177317 (EP), filed on May 29, 2020.
Prior Publication US 2023/0227289 A1, Jul. 20, 2023
Int. Cl. B66B 9/08 (2006.01)
CPC B66B 9/0853 (2013.01) [B66B 9/0807 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A stairlift, comprising:
a rail;
a carrier configured to drive along said rail; and
a chair supported by said carrier, said carrier and said chair together defining a stairlift unit, said chair having:
a base body coupled to said carrier;
a seat body foldably coupled to said base body by a seat joint, and having a first folding system operatively coupled thereto that is configured to fold and unfold said seat body;
a leg body foldably coupled to said seat body by a leg joint, and having a second folding system operatively coupled thereto that is configured to fold and unfold said leg body;
a footrest body foldably coupled to said leg body by a footrest joint, and having a third folding system operatively coupled thereto that is configured to fold and unfold said footrest body;
a backrest body coupled to said base body; and
an armrest body foldably coupled to said backrest body,
wherein each of said first, second, and third folding systems are respectively operated by either a first motor or a second motor that are configured to control said respective folding systems according to a variable speed profile.