US PATENT SUBCLASS 297 / 311
MOVABLE BOTTOM

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

311MOVABLE BOTTOM {5}
312  DF  .~> Independently movable resilient bottom sections
313  DF  .~> Tiltable {5}
337  DF  .~> Movable independently of back {1}
340  DF  .~> Interconnected with back for relative concurrent movement {1}
344.1  DF  .~> Bottom and back movable as a unit {3}

DEFINITION

Classification: 297/311

(under the class definition) Device wherein means are provided to displace or permit displacement of the bottom relative to the other components of a seating device or relative to a base member by means of an articulation between the bottom and the other components or between the bottom and the base member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1+, for a seat wherein components, including a bottom, are rotatable a portion of a revolution about a horizontal axis to expose an additional supporting surface.

19+, for a collapsible chair having a movable bottom with means to hold the bottom in plural operative configurations between a collapsed position and a fully extended position.

62, for a chair having parts, including a bottom, which are repositioned to provide stacked bunks.

65, for adjacent seats wherein the bottom of one seat moves horizontally responsive to the reclining of its back. 68+, for a leg or footrest interconnected to move relative to a bottom and concurrent with a bottom.

105+, for a displaceable bottom which exposes a supplemental body support.

119+, for a bottom movable to convert a chair or seat to a table.

135+, for a movable bottom combined with a table.

233, for a seat having components, including a bottom, which are rearrangeable to plural seats, or wherein a bottom is movable from a nonuse position to a use position complementary to another seat.

234, for an additional bottom supported from another seat in use position which moves from the use position to a nonuse position.

240+, for plural seats in which the bottoms are relatively rotatable.

261.1+, for a bottom adjustably mounted on rockers.

273+, for a suspended oscillating seat connected to or through an adjunctive rest.

SEE OR SEARCH CLASS

60, Power Plants,

477+, for a jack-type device by fluid pumped from a reservoir. 74, Machine Element or Mechanism,

111+, for an intermittent grip type mechanical movement of general utility, and subclasses 640+ for a gear train, particularly subclass 424.8 for screw and nut gearing.

91, Motors: Expansible Chamber Type, appropriate subclasses for a motor actuator of general utility.

418, Rotary Expansible Chamber Devices, for rotary expansible chamber motors, per se.