192 clutches and power-stop control – Clutches – Operators
Patent
1980-01-03
1981-10-20
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
29522R, 335281, F16D 2710
Patent
active
042955530
ABSTRACT:
An electromagnetic clutch having an energizing device including a cylindrical yoke assembly composed of a yoke member and a yoke holder, and a winding housed in the yoke assembly. The yoke member has an outer cylindrical wall and an inner cylindrical wall constituting a double wall cylindrical structure, and a doughnut-shaped bottom wall connecting the outer and inner cylindrical walls together. The outer cylindrical wall is tapering in going from the bottom wall toward the upper end, and the inner cylindrical wall has a constant thickness lower portion of a predetermined height contiguous with the bottom wall and a tapering portion contiguous with the constant thickness lower portion and having its thickness successively reduced in going toward the upper end. The inner cylindrical wall has an annular groove formed on its inner circumferential surface in its constant thickness lower portion. When the yoke member and the yoke holder is assembled, the yoke holder is force fitted to the yoke member and a clamping force is exerted on the yoke assembly in such a manner that the latter is plastically deformed to have its material flow into the annular groove of the yoke member to form a joint, whereby the yoke member can be firmly fitted to the yoke holder.
REFERENCES:
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patent: 3055470 (1962-09-01), Pierce
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patent: 4125298 (1978-11-01), Heurich et al.
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patent: 4150738 (1979-04-01), Sayo et al.
Kanamaru Hisanobu
Sayo Kosaku
Suginuma Atsushi
Tatsumi Hideo
Bonck Rodney H.
Hitachi , Ltd.
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