Adjustable frame wheelchair
AssigneeMulholland Designs, Inc.
InventorLawrence K. Mulholland
Life of this patent
Estimating the term…
Abstract
A wheelchair having opposing sideframes which comprise individual frame sections which are connected by a longitudinally and angularly adjustable joint. The frame sections include a fixed base section connected to linear bar sections. The bar sections are provided with lateral slots containing slidable fasteners. Link elements having fasteners that engage the slidable fasteners join together the bar sections. The joint is movable along the bar section slots and is rotatable about the link fasteners. Similarly, adjunct wheelchair assemblies may all be adjustably connected to the slidable fasteners of selected frame bar sections. The sideframes can include side braces and may be connected by laterally adjustable spacer bars.
Claims41
In a wheelchair having a seat, backrest and wheels, the improvement comprising:
- opposing adjustable sideframes supporting said seat, backrest and wheels, each sideframe being adjustably fixed in a predetermined configuration comprising a base section, an upright section, an upper section and a front section, said upright section extending upwardly from said base section to the upper section, said upper section extending from said upright section to the front section, said front section extending downwardly from said upper section, said upright section and said front section each being connected to said upper section by a respective tightenable link means, said upright, upper and front sections each having a track means comprising a longitudinal slot containing at least one slidable fastener which is movable along said slot whereby said link means can engage a corresponding slidable fastener at any predetermined location along the length of said slot and form a tightenable adjustable joint between respective upright, upper and front sections.
In a wheelchair having a seat, backrest and wheels supported by a framework, the improvement comprising:
- opposing spaced-apart sideframes each comprising a base section and frame bar sections, said sections assembled to form at least a three-cornered structure having a non-adjustable fixed angular corner with at least two angularly adjustable corners which are securable in a predetermined configuration by a tightenable link means, said frame bar sections comprising an upright section, an upper section and a front section, said upright section extending from the base section to said upper section to form an upright backside to said sideframe, the upper section extending from said upright section to said front section and said front section extending downwardly from said upper section, said frame bar sections each having a track means comprising a longitudinal slot containing at least one slidable fastener which is movable along said slot so that said link means can engage said slidable fastener and interconnect at least said upright section with said upper section and said front section with said upper section.
In a wheelchair having a framework supporting a seat, backrest and wheels, wherein the framework includes an improvement comprising:
- opposing sideframes each comprising at least three discrete linear frame bar sections adjustably joined together in a three-sided structure by a tightenable link means, said frame bar sections comprising an upright section connected to an upper section which is connected to a front section, said frame bar sections each having a track means comprising a longitudinal slot which contains at least one slidable fastener which is movable along said slot whereby said link means can engage said slidable fastener and interconnect respective frame bar sections in predetermined angular and longitudinal orientations;
- and,
- a base section connected to said upright section.
Dependencies are inferred from the claim text.