US PATENT SUBCLASS 174 / 8
WITH FLUIDS OR VACUUM

Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

8WITH FLUIDS OR VACUUM {12}
9 R  DF  .~> Current conductive fluid and/or vacuum {1}
10  DF  .~> With cable or conduit preinstallation devices
11 R  DF  .~> With fluid-condition responsive and/or indicating means {1}
12 R  DF  .~> With expansion and contraction means {2}
14 R  DF  .~> With fluid maintenance or conditioning means {1}
15.1  DF  .~> With cooling or fluid feeding, circulating or distributing {6}
17 R  DF  .~> Boxes and housings {7}
19  DF  .~> Conduit or cable end structure {1}
21 R  DF  .~> Conduit or cable joints {6}
23 R  DF  .~> With fluid stops {1}
24  DF  .~> Conduits, cables and conductors {3}
30  DF  .~> Insulators {1}

DEFINITION

Classification: 174/8

(under the class definition) Structures in which a vacuum or fluid is employed or having means peculiarly adapted for use in connection with a vacuum or with material in a fluid condition.

(1) Note. In the subject matter for this class, all spaces are subject to being filled with insulating material in a fluid or solid condition. Thus when the claims define structure which will provide such space, classification will be made in subclasses 8+ only when the claims are limited to the use of fluid or presence of a vacuum and/or are limited to structure which will have its intended function because of the use of materials in fluid condition or the presence of a vacuum. This principle is further stated in particular Notes to the indented subclasses.

(2) Note. Even though the material is disclosed as being of a character which will subsequently harden, if the means claimed provides for using or handling such material in a fluid condition, it is in this subclass or the indented subclasses. The fluid may be in any state, i.e., a liquid, gas, or vapor.

(3) Note. Where the sole fluid is the atmosphere exterior to the device, it is excluded, even though means to seal or otherwise keep moisture or air out is claimed.

(3.5) Note. See Lines With Other Classes, 1., and "Housing, Boxes or Receptacles" of the class definition for the subject matter included in this and the indented subclasses. Note that this and the indented subclasses include housings and envelopes for electric lamps, electric space discharge devices and similar devices which are within the class and subclass definition. See especially indented subclasses 9, 15.1+, 17+ (see 17.05+ for the hermetically sealed envelopes and housings) and subclass 31. Note that merely stating that the housing or envelope is for a vacuum or gas filled tube will not cause classification in this or the indented subclass even though hermetic seals for the housing or envelope are claimed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for fluid conveying conduits combined with conductors. 101.5, for gas filled or vacuum spaces to merely make conduit

or cable structures buoyant.

118, for the use of powdered or granular material in insulated cables.

126.1+, for bare conductors made of single or plural wires.

211, for the exterior formation of insulators to dispose of rain or atmospheric moisture.

SEE OR SEARCH CLASS

137, Fluid Handling, for fluid handling devices in general, particularly

375,.

218, High-Voltage Switches With Arc Preventing or Extinguishing Devices,

1+, for switches utilizing arc extinguishing fluids.

313, Electric Lamp and Discharge Devices,

11+, provides for electric lamps and electric space discharge devices which are provided with means for modifying the temperature of the lamp or discharge device (including such devices where a fluid is used as the temperature modifying medium), subclasses 567+ provides for lamps and discharge devices which have an envelope containing a gas or vapor, subclasses 231.01+ provides for discharge devices having means for introducing a fluent material to the discharge space and for lamps and discharge devices having means for directing the flow of fluent material in the lamp or discharge device. 333, Wave Transmission Lines and Networks,

219+, for resonators (e.g., cavity type) and subclasses 236+ for long lines (e.g., wave guide type) in which a vacuum, gas or fluid is employed.

336, Inductor Devices, provides in

55+, for transformer and inductive reactor structure with means to modify the temperature of the structure (including where a fluid is used as a temperature modifier).