Land vehicles – Wheeled – Occupant propelled type
Patent
1987-11-30
1989-05-30
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
2802501, 2802811, 403108, 297DIG4, A45B 100
Patent
active
048344133
ABSTRACT:
A collar or body portion (40) has an inner surface (42) that defines a circular bore (44) therethrough. A cam surface (46) is recessed into the collar portion from the circular bore. The collar is disposed with a tubular member (22) extending through the circular bore with a spring biased detent (30) engaging the cam surface. A series of upper plateaus or segments (60) and lower plateaus or segments (62) hold the detent against the cam surface as the collar is rotated. A handle portion (64) facilitates manually rotating the collar to depress or release the spring biased detent.
REFERENCES:
patent: 2289818 (1942-07-01), Winner et al.
patent: 4056115 (1977-11-01), Thomas
Everest and Jennings 3N FreeWheeler Advertising Brochure, 6/1985.
Invacare Rolls 2000 LT Advertising Brochure, Mar. 1987.
Invacare Rolls 500 ATS and 500 STS Advertising Brochure, Oct. 1986.
Invacare Rolls 400/Deluxe 200/DLW 200 and 200 Series Advertising Brochure, Sep. 1985.
Invacare Rolls Prescription Wheelchairs, 900 Series, Advertising Brochure, May 1986.
Invacare Rolls Elite Advertising, Brochure, 7/1976.
Herrmann Raymond J.
Patel Nathalal G.
Tuckowski Thomas J.
Invacare Corporation
Marmor Charles A.
McGiehan Donn
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