US PATENT SUBCLASS 74 / 473.21
.~.~.~ Restriction of shift, gear selection, or gear engagement

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

Internet Version by PATENTEC © 1999      Terms of Use


74 /   HD   MACHINE ELEMENT OR MECHANISM

469  DF  CONTROL LEVER AND LINKAGE SYSTEMS {8}
471 R  DF  .~ Multiple controlled elements {3}
473.1  DF  .~.~ Transmission control {11}
473.21.~.~.~ Restriction of shift, gear selection, or gear engagement {5}
473.22  DF  .~.~.~.~> Prevention of reverse shift
473.23  DF  .~.~.~.~> Separate actuator to disengage restrictor
473.24  DF  .~.~.~.~> Shift element interlock {2}
473.27  DF  .~.~.~.~> Spherical restrictor
473.28  DF  .~.~.~.~> Resiliently biased restrictor

DEFINITION

Classification: 74/473.21

Restriction of shift, gear selection, or gear engagement:

(under subclass 473.1) Transmission control wherein movement of a shifting element is regulated, limited, or prohibited.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325, in which a plurality of speeds are transmitted from one shaft to another by optionally engaging or meshing selected gears or clutches or gears and clutches, to their supporting shafts.

SEE OR SEARCH CLASS

477, Interrelated Power Delivery Controls, Including Engine Control,

51+, wherein fluid resistance inhibits rotation of a planetary transmission element and 125+ for the prevention of an unsafe or unintentional shift.