Work holders – Holder mounted for movement
Patent
1981-11-20
1984-03-27
Watson, Robert C.
Work holders
Holder mounted for movement
269289R, 269104, 248346, 108 1, B23Q 106
Patent
active
044389124
ABSTRACT:
A swivelling device for supporting a large-size part in the form of a spherical dome, including a supporting structure (1) in the form of a truncated pyramid contriving at least five bearing surfaces one of which corresponds with the small base of the truncated pyramid and the others with its side faces. A crown (12) for support and attachment of the spherical dome (18) is connected to the supporting structure (1) by way of a connecting structure (10-11). The axis of the truncated pyramid coincides with the axis of the crown (12) and the spherical dome (18) is placed on the crown (12) with its axis along this common direction. Different orientations of the dome (18) may be obtained by resting the device upon the different bearing surfaces of the structure (1). The device is useful in particular for the support of domed ends of pressurized-water nuclear reactor vessels upon which work of welding or building up is being carried out.
REFERENCES:
patent: 1288193 (1918-12-01), Reed
patent: 2481724 (1949-09-01), Croteau
patent: 3331072 (1967-07-01), Pease
patent: 3392398 (1968-07-01), Bowditch
patent: 3530477 (1970-09-01), Jarrett et al.
patent: 3546704 (1970-12-01), Selby et al.
patent: 3713164 (1973-01-01), Foury
Framatome
Schad Steven P.
Watson Robert C.
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