US 11,795,631 B2
Linkage system for screed extension
Timothy L Wehrenberg, Maple Grove, MN (US); Toby Frelich, Saint Michael, MN (US); Brad W Green, Siler City, NC (US); and Ryan Thiesse, Otsego, MN (US)
Filed by Caterpillar Paving Products Inc., Brooklyn Park, MN (US)
Filed on Jun. 22, 2021, as Appl. No. 17/354,741.
Prior Publication US 2022/0403608 A1, Dec. 22, 2022
Int. Cl. E01C 19/42 (2006.01); E01C 19/48 (2006.01)
CPC E01C 19/42 (2013.01) [E01C 19/4873 (2013.01); E01C 2301/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A paving machine, comprising:
a linkage system that is included in a screed extension of a screed assembly of the paving machine, wherein the linkage system includes:
a mounting plate that includes a mounting plate finger;
an upper rail that is attached to the mounting plate;
a lower rail to the mounting plate;
a height adjustment shaft;
a set of slide blocks that are disposed in a channel between the upper rail and the lower rail,
wherein each slide block, of the set of slide blocks, includes a shaft hole that holds a portion of the height adjustment shaft within the slide block;
a set of linkage arms,
wherein each linkage arm, of the set of linkage arms, includes a first end that is attached to a corresponding slide block, of the set of slide blocks, and a second end that is attached to a lower frame of the screed extension;
an angle of attack adjustment structure that holds the mounting plate finger at an angle relative to an axis associated with the angle of attack adjustment structure; and
a set of angle of attack adjustment screws, wherein:
the height adjustment shaft is configured to rotate about a longitudinal axis of the height adjustment shaft to adjust a position of the set of slide blocks within the channel,
wherein adjusting the position of the set of slide blocks within the channel causes adjustment of a height of the lower frame of the screed extension; and
each angle of attack adjustment screw, of the set of angle of attack adjustment screws, is configured to rotate about a longitudinal axis of the angle of attack adjustment screw to adjust the angle of the mounting plate finger within the angle of attack adjustment structure,
wherein adjusting the angle of the mounting plate finger within the angle of attack adjustment structure causes adjustment of an angle of attack of the lower frame of the screed extension.