(under the class definition) Apparatus (1) combined with a device outside of the class definition and not provided for in other subclasses of this class or (2) so constructed that by rearrangement of its parts it may be converted from an apparatus performing a function within the class definition to an apparatus performing a distinctly different kind of function either within or without the class definition.
(1) Note. This subclass contains, for example, patents relating to a device comprising a wheel and an endless track each contacting the ground in operative position simultaneously, (2) a device comprising a wheel having a flexible rim which can be deformed to an elliptical shape and be made to operate as a flexible track, and (3) a device comprising a wheel and a flexible track combined therewith in such a way that the wheel alone may contact the ground or by a manipulation of the parts, the flexible track may be made to contact the ground.
(2) Note. Patents relating to wheel substitute devices (e.g., flexible tracks) disclosed as merely assembled with or substituted for a wheel or wheels to convert the wheel or wheels to a wheel substitute device are not included in this definition. See search notes below. If however the patent relates to a device in which a wheel contacting the ground and a wheel substitute means are each present at the same time the patent comes within the definition. See part (3) of (1) Note.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51, for an attachment to be secured to a track tread to prevent the cleats of the tread from digging into the ground.
124+, and 143+, for wheel substitute devices which may comprise track means associated with wheels to convert the wheels to a wheel substitute, the track means not being present in the device when the wheel is in operation so as to contact the ground.
187+, for a detachable ground penetrating cleat for a track tread. SEE OR SEARCH CLASS
180, Motor Vehicles,
9.26+, for a wheel vehicle adapted to be converted into an endless flexible track vehicle.
