US PATENT SUBCLASS 305 / 132
.~.~ With roller support mounted for movement individually or in pairs

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

Internet Version by PATENTEC © 1999      Terms of Use


305 /   HD   WHEEL SUBSTITUTES FOR LAND VEHICLES

124  DF  WITH TRACK SUPPORT INTERMEDIATE OF END WHEELS {4}
129  DF  .~ With roller support contacting lower track run {9}
132.~.~ With roller support mounted for movement individually or in pairs {2}
133  DF  .~.~.~> Including individual roller mounted for movement at end of arm
134  DF  .~.~.~> Including walking beam or pivoting arm

DEFINITION

Classification: 305/132

With roller support mounted for movement individually or in pairs:

(under subclass 129) Apparatus wherein the cylindrical track holding means is adapted to change in its position either singularly or as a plurality of a set of two with respect to the remaining holding means.

SEE OR SEARCH CLASS

180, Motor Vehicles,

9.58, for an adjustable track support mounted for vertical movement having a leaf or torsion spring; subclass 193 for an endless track type element having a vertically movable track support. [figure] [caption]A - Idler wheel; B - Sprocket wheel; C - Roller frame; D, E - Front rear rollers rigidly

supported; F, G - Roller vertically mounted with downward biasing w/spring rate "K"'; H, J - Springs w/equal spring rate K; K, L - Central rollers vertically mounted with downward biasing w/spring rate K less than K; M, N - Springs with equal spring rate K