Land vehicles – Wheeled – Occupant propelled type
Patent
1990-10-29
1992-04-14
Hill, Mitchell J.
Land vehicles
Wheeled
Occupant propelled type
280253, 280257, B62M 104
Patent
active
051041375
ABSTRACT:
An apparatus, more particularly a bicycle, which includes a device or assembly for providing rotary power. The device or assembly comprises a frame; a shaft rotatably mounted to the frame; and a first and second pawl member connected to the shaft. A first sprocket is coupled to the first pawl member for ratcheting therewith and for rotating the shaft in a predetermined direction; and a second sprocket is coupled to the second pawl for also ratcheting therewith and for rotating the shaft in the predetermined direction. A first and second idler sprocket is rotatably supported by the frame such that a first and second endless chain respectively is entrained over the first and second idler sprockets and the first and second sprockets. A drive sprocket is connected to the shaft. An endless drive chain in entrained to the drive sprocket and is coupled to a rear wheel of a bicycle. A first and second pedal support and guide assembly is supported by the frame, and a first and second pedal member is respectively slideably engaged to the first and second pedal support and guide assembly. A method for providing rotary power to a device comprising coupling a first and a second sprocket to a shaft for rotating the same in a predetermined direction, and securing a drive sprocket to the shaft. The method further comprises rotating the first and second sprocket intermittently and alternatively clockwise and counterclockwise to rotate the shaft and drive sprocket in a predetermined direction such that the drive sprocket can provide rotary power.
REFERENCES:
patent: 556802 (1896-03-01), Boyle
patent: 584200 (1897-06-01), Wheatley
patent: 599106 (1898-02-01), Lob et al.
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patent: 2283506 (1942-05-01), Moncada
patent: 3204475 (1965-09-01), Pierce
patent: 3820820 (1974-06-01), Kutz
patent: 4173154 (1979-11-01), Sawmiller et al.
patent: 4515382 (1985-05-01), Boese
Carpenter John Wade
Hill Mitchell J.
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