Liquid heaters and vaporizers – Tubes and connections
Patent
1984-11-13
1987-02-24
Makay, Albert J.
Liquid heaters and vaporizers
Tubes and connections
122360, 122379, 122512, 165 71, 165 76, 165 111, 376249, 376260, 376463, F22B 3710
Patent
active
046449086
ABSTRACT:
A steam generator wrapper closure and a method of installing the same includes a plug member (108) which includes a large diameter portion (110) and a small diameter portion (112) with an annular shoulder portion (114) defined therebetween. A locking pawl (124) is rotatably mounted upon the plug (108) through means of its shaft (122). A pawl shaft extension rod (154) and a handle (150) are utilized to manipulate the pawl (124) and the plug (108) from a position external to the steam generator outer shell (16). The axis of the pawl shaft (122) is radially offset with repect to the axis of the plug (108), and the diametrical extent of the pawl (124) is less than that of the small diameter portion (112) of the plug (108). In this manner, when the pawl (124) is rotated to a first position within which the pawl (124) is disposed within the circumferential boundary of the small diameter portion (112) of the plug (108), the pawl (124) and small diameter plug portion (112) may be inserted within the wrapper penetration (104) until the shoulder portion (114) of the plug (108) engages the exterior surface (118) of the wrapper (46). The pawl (124) may then be rotated to a diametrically opposite position within which the pawl (124) engages the interior surface (138) of the wrapper (46) thereby lockingly retaining the plug member (108) within the wrapper penetration (104).
REFERENCES:
patent: 2688315 (1954-09-01), Davy
patent: 3352756 (1967-11-01), Lockett et al.
patent: 3550561 (1970-12-01), Evans
patent: 3850795 (1974-11-01), Thome
patent: 4037569 (1977-07-01), Bennett et al.
patent: 4143708 (1979-03-01), Haynes
patent: 4312708 (1982-01-01), Leslie
DePaul L. A.
Makay Albert J.
Warner Steven E.
Westinghouse Electric Corp.
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