US PATENT SUBCLASS 180 / 6.2
STEERING BY DRIVING

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


180 /   HD   MOTOR VEHICLES

6.2STEERING BY DRIVING {9}
6.24  DF  .~> Combined with manual steering {1}
6.44  DF  .~> Auxiliary steering motor
6.48  DF  .~> Independently operable drive motors {1}
6.54  DF  .~> Variable contact
6.58  DF  .~> Controlled from rotatably mounted superstructure {1}
6.62  DF  .~> Combined
6.64  DF  .~> Swinging traction frame responsive to differential drive
6.66  DF  .~> Reversing drive to traction element
6.7  DF  .~> Endless flexible track

DEFINITION

Classification: 180/6.2

(under the class definition) Vehicles having means to cause a relative difference in rate of travel between traction elements on opposite sides, as by: (1) unclutching or otherwise disengaging the road traction element or elements on one side from its driving means; (2) changing the speed of, or the amount of power transmitted to, the traction element or elements to produce a differential effect; or (3) varying the effective tractive area of the driving element or elements.

(1) Note. The line between this group of subclasses and Classes 74, Machine Element or Mechanism, 188, Brakes and 192, Clutches and Power-Stop Control and 475, Planetary Gear Transmission Systems or Components, is that where specific vehicle frame structure or arrangement not related to the transmission of power is claimed, such as, the location or equilibrious positioning of the motor, transmission or the like on the frame, or other vehicle feature (e.g., load carrying structure or nondriven wheels), classification is in Class 180.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23, for vehicles in which the driving wheels are positively moved by independent means for steering the vehicle.

24.01, for vehicles in which wheels other than driving wheels are positively moved by independent means for steering the vehicle.

24.08, for similar devices in which steering of the vehicle is not involved.

400+, for power steering gear mechanism and steering gear combined with vehicle power features. SEE OR SEARCH CLASS

74, Machine Element or Mechanism, appropriate subclasses, for power transmitting elements included in steering by driving mechanism wherein specific vehicle structure or specific relation with vehicle structure is not claimed (i.e., the vehicle is included in name only). See (1) Note.

188, Brakes, appropriate subclasses, for brakes included in steering by driving mechanism wherein no significant vehicle structure is claimed. See (1) Note.

192, Clutches and Power-Stop Control, appropriate subclasses,

for brakes and clutches, plural clutches, transmission control with brake control or clutch, etc., wherein no significant vehicle structure is claimed. See (1) Note.

475, Planetary Gear Transmission Systems or Components,

18+, for steering by driving. See (1) Note.

477, Interrelated Power Delivery Controls, Including Engine Control, for steering by driving, including interrelated engine and transmission, clutch, or brake controls and lacking significant vehicle structure. The same line exists between Class 180 and Class 477 as exists between Class 180 and Class 74 as set forth above.