Electric heating – Metal heating – Nonatmospheric environment at hot spot
Reexamination Certificate
2006-10-10
2006-10-10
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
Nonatmospheric environment at hot spot
C219S136000
Reexamination Certificate
active
07119301
ABSTRACT:
A device (10) for isolating a surface for welding in an underwater location or in high fire risk areas. The device comprises a housing (27) which is arranged to be mounted on the surface and a sealing means (30) to provide a seal between the housing and the surface. The housing (27) is provided with a sealed inlet (50) for receiving a welding apparatus, a fluid inlet (32) for the passage of gas into the housing, and a fluid outlet (34) for the passage of gas and/or liquid out of the housing. A heating means FIG.3is not figure) for providing heated gas to the fluid inlet is also provided. In use, an ingress of heated gas through the fluid inlet (32) facilitates an egress of gas and/or liquid, contained in a space defined by the housing and the surface, through the fluid outlet (34) in the housing. In this way an in situ dry gaseous environment is provided for welding the surface. The heating means (100) is provided upstream and comprises a space with heating elements (120) surrounded by insulation (130) with electrical inlets (122).
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patent: 1716614 (1929-06-01), Bergman
patent: 4039798 (1977-08-01), Lythall et al.
patent: 4654500 (1987-03-01), Stiles et al.
patent: 4956537 (1990-09-01), Schnorrer
patent: 5750954 (1998-05-01), White et al.
patent: 5852271 (1998-12-01), Offer
patent: 53-15242 (1978-02-01), None
patent: 55-14125 (1980-01-01), None
Derwent Publications, p. 55, PAN 92/396102/48 NL 9100586A—KEMA, 1992.
Duane Morris LLP
Neptune Marine Services Limited
Shaw Clifford C.
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