US PATENT SUBCLASS 432 / 250
.~ Door, cover or port
Current as of:
June, 1999
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Terms of Use
432 /
HD
HEATING
247
DF
HEATING OR HEAT RETAINING WORK CHAMBER STRUCTURE
{5}
250
.~ Door, cover or port
DEFINITION
Classification: 432/250
(under subclass 247) Apparatus including structure defining (1) a feed or access opening of a work chamber or (2) a removable cover for such opening.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64, for a heater having a fluid curtain at a chamber port or work path.
65, for a heat shield or fume collector at a furnace chamber access area.
73, for a combustion products flue or generator and a work chamber mounted for relative movement for access.
237, for a protectively cooled door, cover, door frame, or rim of a cover of a heating furnace.
242, for a closure or seal for an entrance passage through which a feeding means causes work to move.
SEE OR SEARCH CLASS
34, Drying and Gas or Vapor Contact With Solids,
242, for a chamber seal in a gas-solid contact device.
49, Movable or Removable Closures, appropriate subclass for a movable or removable closure of general utility.
110, Furnaces,
173+, for a door, and subclass 181 for a door easing or arch, usable in either a heating or solid fuel combustion furnace.
126, Stoves and Furnaces,
190+, for door structure applicable to a cooking or direct heat radiating heating stove.
