Cutlery – Cutting tools – With blade moving means
Patent
1989-11-20
1990-09-04
Yost, Frank T.
Cutlery
Cutting tools
With blade moving means
0302961, B26B 700, A01D 3468
Patent
active
049532944
ABSTRACT:
The invention is directed to a portable handheld tool such as a brushcutter which includes a work tool assembly and a drive motor connected by a drive shaft. The drive shaft is surrounded by a protective tube and is centrally held therein by means of a bearing sleeve unit. The bearing sleeve unit braces itself against the inner peripheral wall surface of the protective tube via outwardly extending supporting ribs. The mounting of the bearing sleeve unit within the protective tube must be adapted precisely with respect to tolerances in order to prevent damaging deformations of the bearing sleeve unit and to prevent the bearing sleeve unit from vibrating within the protective tube. At least one of the supporting ribs is configured so as to be resilient in the radial direction so that it effects a tolerance compensation as well as attenuates vibration.
REFERENCES:
patent: 3581523 (1971-06-01), Bartholomew
patent: 3610056 (1970-03-01), Bartholomew
patent: 3977078 (1976-08-01), Pittinger Jr.
patent: 4112708 (1978-09-01), Fukuda
patent: 4226021 (1980-10-01), Hoff
patent: 4424045 (1984-01-01), Kolischenko et al.
patent: 4848846 (1989-07-01), Yamada et al.
Andreas Stihl
Husar John M.
Ottesen Walter
Yost Frank T.
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