US 12,345,000 B2
Road finishing machine and method for levelling a screed
Ralf Weiser, Ladenburg (DE); Philipp Stumpf, Heidelberg (DE); and Stefan Simon, Neuhofen (DE)
Assigned to JOSEPH VOEGELE AG, Ludwigshafen/Rhein (DE)
Filed by JOSEPH VOEGELE AG, Ludwigshafen/Rhein (DE)
Filed on Oct. 8, 2021, as Appl. No. 17/497,086.
Claims priority of application No. 20200791 (EP), filed on Oct. 8, 2020.
Prior Publication US 2022/0112669 A1, Apr. 14, 2022
Int. Cl. E01C 19/48 (2006.01); E01C 19/00 (2006.01); E01C 23/01 (2006.01)
CPC E01C 19/4873 (2013.01) [E01C 19/006 (2013.01); E01C 23/01 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A road finishing machine, comprising a screed for producing a paving layer on a subsoil on which the road finishing machine is movable in a laying direction along a laying section, wherein the screed is height-adjustable and has a pulling arm which is fixed to the road finishing machine at a front pulling point formed thereon by means of a levelling cylinder, at least one measuring means for performing at least one distance measurement, a storage means, a controlling system and a closed-loop controller means operatively linked thereto for adapting a setting of the levelling cylinder, wherein the controlling system is embodied to calculate a correction value in response to at least one distance measurement performed with respect to the subsoil and/or to a reference, which is performable at a measuring point located in front of a front edge of the screed in the laying direction, to at least temporarily store the correction value in the storage means and calculate, with a continued laying operation, a desired levelling value for the measuring point, taking into consideration the stored correction value, and wherein the levelling cylinder of the screed is controllable based on the desired levelling value when the front edge of the screed reaches the measuring point.