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US 12,728,052 B2Granted
Wheelchair propulsion system
OwnerTodd Coxinventor
Life of this patent
Estimating the term…
Abstract
A wheelchair including a wheelchair propulsion system adapted to independently operate each of a pair of drive wheels by corresponding independent manual rotation of a pair of cranks.
Claims13
A wheelchair, comprising:
- a wheelchair body;
- a pair of drive wheels rotatably secured to said wheelchair body;
- and
- a propulsion mechanism operable to independently drive each of said pair of drive wheels rotatably secured to said wheelchair body, said propulsion mechanism including:
- a pair of cranks each rotatably coupled to said wheelchair body, a first of said pair of cranks adapted to operate independently from operation of a second of said pair of cranks;
- a first pair of drive members, wherein one of said first pair of drive members operably coupled to the respective one of said pair of cranks;
- a second pair of drive members rotatably coupled to said wheelchair body, wherein one of said second pair of drive members operatively coupled to the respective one of said first pair of drive members with a first circuitous member;
- a third pair of drive members rotatably coupled to said wheelchair body, wherein one of said third pair of drive members disposed coaxially and adjacent to the respective one of said second pair of drive members;
- a fourth pair of drive members, wherein one of said fourth pair of drive members coaxially coupled to the respective one of said pair of drive wheels, wherein one of said third pair of drive members operatively coupled to each of said fourth pair of drive members with a second circuitous member;
- wherein an absence of rotation of said first of said pair of cranks or second of said pair of cranks uncouples corresponding operation of one of said third pair of drive members and said fourth pair of drive members from corresponding operation of one said first pair of drive members and said second pair of drive members.
7 more elements
A wheelchair, comprising:
- a wheelchair body;
- a pair of drive wheels rotatably secured to said wheelchair body;
- and
- a propulsion mechanism operable to independently drive each of said pair of drive wheels rotatably secured to said wheelchair body, said propulsion mechanism including:
- a pair of cranks each rotatably coupled to said wheelchair body, a first of said pair of cranks adapted to operate independently from operation of a second of said pair of cranks;
- a first pair of drive members, wherein one of said first pair of drive members operably coupled to the respective one of said pair of cranks;
- a second pair of drive members rotatably coupled to said wheelchair body, wherein one of said second pair of drive members operatively coupled to the respective one of said first pair of drive members with a first circuitous member;
- a third pair of drive members rotatably coupled to said wheelchair body, wherein one of said third pair of drive members disposed coaxially and adjacent to the respective one of said second pair of drive members;
- a fourth pair of drive members, wherein one of said fourth pair of drive members coaxially coupled to the respective one of said pair of drive wheels, wherein one of said third pair of drive members operatively coupled to each of said fourth pair of drive members with a second circuitous member;
- and
- a pair of transmissions, wherein one of said pair of transmissions coupled to the respective one of said second pair of drive members or to the respective one of said third pair of drive members.
8 more elements
A wheelchair, comprising:
- a wheelchair body:
- a pair of drive wheels rotatably secured to said wheelchair body;
- a propulsion mechanism operable to independently drive each of said pair of drive wheels rotatably secured to said wheelchair body, said propulsion mechanism including:
- a pair of cranks each rotatably coupled to said wheelchair body, a first of said pair of cranks adapted to operate independently from operation of a second of said pair of cranks;
- a first pair of drive members, wherein one of said first pair of drive members operably coupled to the respective one of said pair of cranks;
- a second pair of drive members rotatably coupled to said wheelchair body, wherein one of said second pair of drive members operatively coupled to the respective one of said first pair of drive members with a first circuitous member;
- a third pair of drive members rotatably coupled to said wheelchair body, wherein one of said third pair of drive members disposed coaxially and adjacent to the respective one of said second pair of drive members;
- a fourth pair of drive members, wherein one of said fourth pair of drive members coaxially coupled to the respective one of said pair of drive wheels, wherein one of said third pair of drive members operatively coupled to each of said fourth pair of drive members with a second circuitous member;
- and
- a pair of motors, wherein one of said pair of motors disposed to drive the respective one of said second pair of drive members.
7 more elements
Dependencies are inferred from the claim text.