US 11,655,599 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., Antioch, TN (US)
Filed on May 6, 2021, as Appl. No. 17/313,337.
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 17/313,337 is a continuation of application No. 16/659,616, filed on Oct. 22, 2019, granted, now 11,008,716.
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 2021/0324590 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. E01C 23/08 (2006.01); E01C 23/12 (2006.01); G01B 5/18 (2006.01); E01C 23/088 (2006.01)
CPC E01C 23/088 (2013.01) [E01C 23/127 (2013.01); G01B 5/18 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for measuring the milling depth of a road milling machine, the machine being operative to mill a ground surface with a milling roller lowered to a milling depth to create a milling track, the machine including a machine frame supported from a plurality of ground engaging units by a plurality of lifting columns, the milling roller being attached to the machine frame, the machine including at least one side plate located to at least one side of the milling roller to engage an untreated ground surface, and the machine including a stripping plate operative to be lowered onto the milling track generated by the milling roller, the method comprising:
(a) measuring the milling depth of the milling track, the measuring including detecting a measurement value relative to the machine frame of at least one ground engaging sensor;
(b) adjusting 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) automatically controlling a lifted condition of at least a second one of the lifting columns to establish a predetermined inclination front to rear of the machine frame.