Motor vehicles – Special wheel base – Collapsible or knockdown for storage or transport
Patent
1988-05-03
1990-01-09
Marmor, Charles A.
Motor vehicles
Special wheel base
Collapsible or knockdown for storage or transport
180 907, 280 71, 2802501, 403363, B62D 6100
Patent
active
048921661
ABSTRACT:
A device for coupling a front wheel unit of a motorized wheelchair with a rear wheel unit to obtain an assembled motorized wheelchair. Generally the front wheel unit includes a wheel and handlebars or a steering wheel. The rear wheel unit includes at least a frame and a wheel rotatably connected to the frame. The coupling device includes a connector portion at the front end of the rear unit frame, which connector is generally vertically oriented but inclined forward slightly. The front wheel unit correspondingly has at its rear end a connector portion which is inclined forward at approximately the same angle as the rear connector, and sized and positioned so as to telescopically interfit with the rear connector. The coupling device further includes a horizontal transverse bar connected to the rear unit frame in front of the rear wheel, and a support frame connected to the rear end of the front unit and positioned so as to rest on the rear wheel unit frame bar when the front unit and rear unit connector portions have been telescopically interfitted together. The connector portions are generally square in cross-section, and may be oriented in one of two ways. Either two of the sides of the connector portion may be generally parallel to the fore-aft longitudinal axis of the wheelchair, or the diagonal of the square cross-section may be parallel to that longitudinal axis.
REFERENCES:
patent: 2696272 (1954-12-01), Schlaphoff
patent: 3605929 (1971-09-01), Rolland
patent: 3658354 (1972-04-01), Read
patent: 3821994 (1974-07-01), Bergius et al.
patent: 3945449 (1976-03-01), Ostrow
patent: 4570739 (1986-02-01), Kramer
patent: 4708219 (1987-11-01), Cresswell
patent: 4757868 (1988-07-01), Cresswell
Culbreth Eric
Marmor Charles A.
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