US 12,006,642 B2
Road milling machine and method for measuring the milling depth
Christian Berning, Zulpich (DE); and Dieter Simons, Buchholz (DE)
Assigned to Wirtgen America, Inc., Antioch, TN (US)
Filed by Wirtgen America, Inc., Nashville, TN (US)
Filed on Apr. 13, 2023, as Appl. No. 18/299,761.
Application 13/557,729 is a division of application No. 12/003,094, filed on Dec. 20, 2007, granted, now 8,246,270, issued on Aug. 21, 2012.
Application 18/299,761 is a continuation of application No. 17/313,337, filed on May 6, 2021, granted, now 11,655,599.
Application 17/313,337 is a continuation of application No. 16/659,616, filed on Oct. 22, 2019, granted, now 11,008,716, issued on May 18, 2021.
Application 16/659,616 is a continuation of application No. 15/880,165, filed on Jan. 25, 2018, granted, now 10,458,078, issued on Oct. 29, 2019.
Application 15/880,165 is a continuation of application No. 15/376,023, filed on Dec. 12, 2016, granted, now 9,879,390, issued on Jan. 30, 2018.
Application 15/376,023 is a continuation of application No. 14/341,191, filed on Jul. 25, 2014, granted, now 9,523,176, issued on Dec. 20, 2016.
Application 14/341,191 is a continuation of application No. 13/557,729, filed on Jul. 25, 2012, granted, now 8,807,867, issued on Aug. 19, 2014.
Claims priority of application No. 102006062129.8 (DE), filed on Dec. 22, 2006.
Prior Publication US 2023/0313471 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E01C 23/08 (2006.01); E01C 23/088 (2006.01); E01C 23/12 (2006.01); G01B 5/18 (2006.01)
CPC E01C 23/088 (2013.01) [E01C 23/127 (2013.01); G01B 5/18 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A road milling machine, comprising:
a machine frame;
a plurality of ground engaging units;
a plurality of lifting columns supporting the machine frame from the plurality of ground engaging units;
a milling roller attached to the machine frame and configured to be lowered to a milling depth to mill a ground surface to create a milling track;
at least one side plate located to at least one side of the milling roller to engage an untreated ground surface;
a stripping plate operative to be lowered onto the milling track generated by the milling roller;
at least one ground engaging sensor; and
a controller configured to:
(a) measure the milling depth of the milling track at least in part by detecting a measurement value relative to the machine frame of the at least one ground engaging sensor;
(b) adjust the milling depth of the milling track by adjusting an extension of at least a first one of the lifting columns to adjust a height of the machine frame; and
(c) establish a predetermined longitudinal inclination front to rear of the machine frame by adjusting an extension of at least a second one of the lifting columns.