The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2014
Filed:
Jun. 10, 2011
Amos G. Winter, V, Chesterfield, NH (US);
Mario A. Bollini, Sterling Heights, MI (US);
Danielle M. Delatte, Ellicott City, MD (US);
Harrison F. O'hanley, Ipswich, MA (US);
Natasha K. Scolnik, Washington, DC (US);
Gwyndaf M. Jones, Carlisle, MA (US);
Daniel D. Frey, Natick, MA (US);
Benjamin Judge, Tewksbury, MA (US);
Benjamin H. Gallup, Norfolk, MA (US);
Danielle Hicks, Modesto, CA (US);
Nydia Ruleman, Germantown, TN (US);
Xuefeng Chen, Burke, VA (US);
Amos G. Winter, V, Chesterfield, NH (US);
Mario A. Bollini, Sterling Heights, MI (US);
Danielle M. DeLatte, Ellicott City, MD (US);
Harrison F. O'Hanley, Ipswich, MA (US);
Natasha K. Scolnik, Washington, DC (US);
Gwyndaf M. Jones, Carlisle, MA (US);
Daniel D. Frey, Natick, MA (US);
Benjamin Judge, Tewksbury, MA (US);
Benjamin H. Gallup, Norfolk, MA (US);
Danielle Hicks, Modesto, CA (US);
Nydia Ruleman, Germantown, TN (US);
Xuefeng Chen, Burke, VA (US);
Global Research Innovation and Technology L3C, Boston, MA (US);
Abstract
A manually powered wheelchair includes a first lever associated with a first rear wheel and demountably coupled to a first drivetrain, the first lever having a first brake thereon. The wheelchair also includes a second lever associated with a second rear wheel and demountably coupled to a second drivetrain, the second lever having a second brake thereon. Each drivetrain includes a chainring, a chain, and a freewheel, and each drivetrain has a fixed gear ratio. The freewheel of each drivetrain is actuated by manual pivoting of the lever associated therewith. In use, the wheelchair achieves changes in mechanical advantage when a user shifts the user's hands up and down the first and second levers.