This is the class for friction gear power transmission and elements thereof, such transmission being defined as an assembly of parts wherein rotary motion is transmitted from an input body to an output body by surface friction of rolling contact between parts associated with said input and output bodies.
(1) Note. A nominal recitation of a device for applying power to, or receiving power from, a structure of this class will not exclude a patent from being placed in this class.
LINES WITH OTHER CLASSES
A method or apparatus for manufacturing a device of this class is not found in Class 476, but is found in an appropriate manufacturing class. See, for example, Class 29, Metal Working, subclasses 893+ and other subclasses in Class 29 directed to process and apparatus of mechanical manufacture.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
721, for systems including plural power paths to or from friction gearing; subclass 745 for plural ratio change gearing in series, one of which may be friction gearing.
180, Motor Vehicles, for combinations of significant vehicle structure which may include friction gearing, especially 368, for friction gearing combinations.
184, Lubrication, for lubrication generally, especially
6.12, for lubrication systems for gearing.
192, Clutches and Power-Stop Control,
3.51+, for controls for a friction transmission and clutch; and subclasses 4+ for a transmission control and brake.
474, Endless Belt Power Transmission Systems or Components, for friction power transmission using an endless, flexible friction drive belt.
475, Planetary Gear Transmission Systems or Components,
165+, for an eccentrically driven friction gear; subclasses
183+ for planetary friction gearing; and subclasses 214+ for a nonplanetary friction gear transmission combined with a planetary transmission.
477, Interrelated Power Delivery Controls, Including Engine Control, especially
37+, for interrelated control between a motor and a continuously variable friction transmission.