Back to results
US 10,376,431 B2Granted
Wheelchair
OwnerDouglas G. Robinsinventor
Life of this patent
Estimating the term…
Abstract
A conveyance to carry humans, such as a wheelchair, is described having levers on each side of the wheelchair that are manually moved forward and backward to propel the conveyance. The user is able to shift into forward, reverse or neutral, brake, and change mechanical advantage (gear ratio), all this without removing the user's hands from the drive levers.
Claims10
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.
4 more elements
An expandable support device extendable above a top of a seat 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;
- 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 composed at least partially of molded expanded foam.
4 more elements
An expandable support device extendable above a top of a seat 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;
- 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;
- a restraining member restraining said expandable support device from a fully extended position downward towards said seat to a retracted position;
- and,
- a fabric disposed on at least some of said plurality of horizontal support members.
4 more elements
An expandable support device extendable above a top of a seat 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;
- 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;
- a restraining member restraining said expandable support device from a fully extended position downward towards said seat to a retracted position;
- and,
- a protective sleeve disposed over said plurality of horizontal support members to prevent surface contamination.
4 more elements
A chair for a human mobility device having an expandable support device extending from a top of a seatback, comprising:
- a first vertical support member and a second vertical support member;
- both of which are vertically movable relative to said seatback and being biased upwardly from said seatback;
- a plurality of horizontal support members connected to said first vertical support member and said second vertical support member;
- at least some of said plurality of horizontal support members being vertically moveable along said first vertical support member and said second vertical support member;
- one or more spring members connected to one or more of said plurality of horizontal support members;
- and
- a restraining cord member connected near a top of said headrest and being retractable to move said headrest from a fully extended position in which said plurality of horizontal support members are spaced apart, to a retracted position in which said plurality of horizontal support members are positioned adjacent each other;
- wherein said one or more spring members bias said plurality of horizontal support members away from each other.
5 more elements
Dependencies are inferred from the claim text.