Wheelchair hand rim

Details Wheelchair hand rim Wheelchair hand rim

1980-12-11

1983-01-04

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Occupant propelled type

74558, 297DIG4, B62M 114

Patent

active

043669646

ABSTRACT:
A wheelchair hand rim that provides improved control and mobility has a cross-sectional contour that is configured to optimize the gripping surface and finger wrap over widely differing angles. The contour (taken at top dead center) is characterized by a lower curved portion of sufficient radius to provide a firm finger grip, a generally vertical inboard portion, an outboard gently curved portion that slopes inboard from bottom to top, and an upper curved portion that includes an outboard segment of a first radius sufficient to provide a firm upper palm grip and an inboard portion of a second, smaller radius that is still sufficient to provide a smooth rest for the thumb of the user. A hand rim suitable for users having extremely limited grip strength has a peripheral configuration that is not circular, but rather undulating.

REFERENCES:
patent: 24075 (1895-02-01), Frisbie
patent: 1872052 (1932-08-01), Wrigley
patent: 2311269 (1943-02-01), Van Cleave
patent: 2685214 (1954-08-01), Maud
patent: 2828645 (1958-04-01), Wilfert
patent: 2938738 (1960-05-01), La Rue et al.
patent: 3282605 (1966-11-01), Nihlean et al.
patent: 3331260 (1967-07-01), Zeller
patent: 3555925 (1971-01-01), Bowser
patent: 4039199 (1977-08-01), Quinby

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