Bearing for lawn trimmer cutter head

Details Bearing for lawn trimmer cutter head Bearing for lawn trimmer cutter head

1987-01-20

1988-10-25

Petrakes, John

Bearings

Rotary bearing

Plain bearing

56 127, 384279, F16C 3310, F16C 3318, A01D 3526

Patent

active

047800020

ABSTRACT:
A bearing assembly is disclosed which is useful in mounting the cutter head of a lawn trimming implement to the tubular casing extending forward and downward from the power head. A flexible shaft housed within the tubular casing conveys rotary motion from the power head to the bearing assembly which comprises a short tubular bearing housing within which is a pair of spaced apart bearings. A central bore through the bearings is sized to accept the first end of a drive connector shaft. Within the tubular bearing housing and between the bearings is a lubricant holding annular felt ring. Adjacent the first end of the drive connector shaft is an annular slot which allows the shaft to be secured in the tubular bearing housing by a C-clip keeper. The midsection of the tubular bearing housing has an enlarged diameter as compared to the end sections which contain the bearings. As a result, when the bearing assembly is installed by press fitting it into the end of the tubular casing there will be no resulting compressive force exerted on the bearings. When the bearing assembly is locked in place within the tubular bearing housing, rotary motion from the flexible shaft is communicated through the drive connector shaft to the rotary cutter head which attaches to the second end thereof. Torque is conveyed to the hub section of the cutter head by means of a hexagonal shoulder integrally formed on the shaft.

REFERENCES:
patent: 2035519 (1936-03-01), Apple
patent: 2293313 (1942-08-01), Sladky
patent: 2800373 (1957-07-01), Kablick et al.
patent: 4148141 (1979-08-01), Hoff
patent: 4226021 (1980-10-01), Hoff
patent: 4451983 (1984-06-01), Johnson et al.
patent: 4476632 (1984-10-01), Prouly

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