Metal working – Means to assemble or disassemble – Means comprising hand manipulatable tool
Patent
1993-07-20
1994-09-20
Watson, Robert C.
Metal working
Means to assemble or disassemble
Means comprising hand manipulatable tool
294 94, 29282, B25B 2714
Patent
active
053476972
ABSTRACT:
An improved tire lift mechanism is disclosed in which a drive tube selectively rotates a driven shaft to raise and lower a cable fixed to a spare tire. The drive tube is connected to the driven shaft through a connection formed of a plurality of circumferentially-spaced pins which are received within notches in the driven shaft. Spaces are provided between the drive pins. Liquids in the area of the connection drain outwardly of the spaces and do not freeze in the area, which could prevent use of the tire lift mechanism. A spring is disposed between the driven shaft and the drive tube to eliminate looseness, and resultant rattling. Finally, a method of assembling the tire lift mechanism is disclosed in which the drive tube is formed of a pair of telescopic tube members. The members are telescopically moved relative to each other to a collapsed position, and the mechanism is fixed to the underside of a vehicle. The tube members are then telescopically moved to an expanded position with the tube moving through a bearing member to mount the tire lift mechanism to the underside of a vehicle. This reduces the complexity of assembling the tire lift mechanism over prior art assemblies.
REFERENCES:
patent: 2393587 (1946-01-01), Bugg et al.
patent: 3007241 (1961-11-01), Gonzalez
patent: 3479722 (1969-11-01), Maness
patent: 3945104 (1976-03-01), Brookover
patent: 3957247 (1976-05-01), Haller et al.
patent: 4072335 (1978-02-01), Tift et al.
patent: 4581963 (1986-04-01), Kim
patent: 4659126 (1987-04-01), Breck et al.
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