Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 1 of 17 PageID #:
`12367
`
`Exhibit I
`
`

`

`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 2 of 17 PageID #:
`12368
`I 1111111111111111 11111 1111111111 1111111111 111111111111111 IIIIII IIII IIII IIII
`US0086904 74B2
`
`c12) United States Patent
`Jurasz et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,690,474 B2
`Apr. 8, 2014
`
`(54) ROAD CONSTRUCTION MACHINE,
`LEVELING DEVICE, AS \VKLL AS METHOD
`FOR CONTROLLING THE MILLING DEPTH
`OR MILLING SLOPE IN A ROAD
`CONSTRUCTION MACHINE
`
`(52) U.S. Cl.
`USPC ........................ .................... 404/75; 404/84.1
`(58) Field of Classification Search
`USPC ....... ......... .................. 404/75 , 84.05-84 .5, 94
`See application file for complete search history.
`
`(71) Applicants: Silvia Tewes, UnkeVRhein (DE)
`Wirtgen GmbH, Wind.hagen (DE)
`
`(72)
`
`Inventors: Jaroslaw Jurasz, Windhagen (DE);
`Giinter Hahn, Konigswinter (DE);
`Giinter Tewes, Unkel (DE)
`
`(73) Assignee: Wirtgen GmbH (DE)
`
`( *)
`
`Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by O days.
`
`(21)
`
`Appl. No. : 13/934,876
`
`(22) Filed:
`
`.Jul. 3, 2013
`
`(65)
`
`Prior Publication Data
`
`US 2013/0294830AI
`
`Nov. 7, 2013
`
`Related U.S. Application Data
`
`(63) Continuation of application No. 13/671,786, filed on
`Nov. 8, 2012, now Pat. No. 8,511 ,932, which is a
`continuation of application No. 13/098,798, filed on
`May 2, 2011, now Pat. No. 8,308,395, which is a
`continuation of application No. 12/225,792, filed as
`application No. PCT/EP2007/053590 on Apr. 12,
`2007, now Pat. No. 7,946,788.
`
`(30)
`
`Foreign Application Priority Data
`
`Apr. 27, 2006
`
`(DE) .......... ............... 10 2006 020 293
`
`(51)
`
`Int. Cl.
`EOJC 231088
`
`(2006.01)
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4,140,420 A *
`4,186,968 A *
`4,270,801 A *
`4,929,121 A *
`
`2/1979 Swisher et al.
`2/1980 Ba1ton ... .
`6/1981 Swisher et al.
`5/ 1990 Lent et al.
`(Continued)
`
`.... ... .. . 404/84.1
`.... ... 299/39.2
`.. 299/1.5
`.... . 404/84.05
`
`FOREIGN PATENT DOCUMENTS
`
`DE
`EP
`
`9204614 Ul
`1154075 A2
`
`7/1992
`11/2001
`
`OTHER PUBLICATIONS
`
`English translation ofWritten Opinion of the International Searching
`Authority, PCT/EP2007/053590, Dec. 10, 2008.
`
`Primary Examiner - Raymond W Addie
`(74) Attorney, Agent, or Firm - Waddey & Patterson, P.C. ;
`Lucian \Vayne Beavers
`
`ABSTRACT
`(57)
`A control and switchover system is provided for controlling
`milling depth and/or slope of a milling dmm of a road con(cid:173)
`stmction machine during a milling operation to create a
`milled surface. The system controls the milling depth and/or
`slope at least in part on a measurement made with a first
`sensor. Without intermpting the milling operation the system
`switches over the control of the milling depth and/or slope to
`control based at least in part on a measurement made with a
`second sensor.
`
`35 Claims, 8 Drawing Sheets
`
`3
`
`WA-0014207
`
`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 3 of 17 PageID #:
`12369
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`US 8,690,474 B2
`Page 2
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`5,318,378 A *
`5,378,081 A *
`5,533 ,790 A *
`5,556,226 A *
`
`6/ 1994 Lent ... ...... .. ... .... ............. 404/75
`1/1995 Swisher, Jr.
`.... 299/39.5
`7/1 996 Weiland ..
`.. .. 299/ 1.5
`.. 404/84.1
`9/ 1996 Hohmann, Jr.
`
`5,984,420 A
`7,422,391 B2 *
`7,510,347 B2 *
`7,559,718 B2
`2002/0192025 Al
`2004/0247388 Al
`2008/0152428 Al
`
`1 lil999
`9/2008
`3/2009
`7/2009
`12/2002
`12/2004
`6/2008
`
`Murray et al.
`Holl et al .
`. ...... ... ... ... .. . 404/84.l
`404/84.5
`Lemke ... ..
`Zachman et al.
`Johnson
`Lloyd
`Berning
`
`* cited by examiner
`
`WA-0014208
`
`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 4 of 17 PageID #:
`12370
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 1 of 8
`
`US 8,690,474 B2
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`'r"I
`" 0l
`Y..
`
`WA-0014209
`
`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 5 of 17 PageID #:
`12371
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 2 of 8
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`US 8,690,474 B2
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`2
`
`4
`
`6c
`
`10a
`
`10b
`
`2a
`
`2b
`
`2c
`
`6a
`
`A
`
`B
`
`C
`
`Fig.2
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`WA-0014210
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`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 6 of 17 PageID #:
`12372
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 3 of 8
`
`US 8,690,474 B2
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`WA-0014211
`
`

`

`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 7 of 17 PageID #:
`12373
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 4 of 8
`
`US 8,690,474 B2
`
`Set 1 0 - - -+ - - - - - - - - - - - -
`
`Actual A 10 - -<1>--------------------------------------------
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`Fig.5
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`
`WA-0014212
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`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 8 of 17 PageID #:
`12374
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 5 of 8
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`US 8,690,474 B2
`
`2c
`
`D
`D
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`
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`
`WA-0014213
`
`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 9 of 17 PageID #:
`12375
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 6 of 8
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`US 8,690,474 B2
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`
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`WA-0014214
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`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 10 of 17 PageID #:
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`U.S. Patent
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`Apr. 8, 2014
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`Sheet 7 of 8
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`US 8,690,474 B2
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`2a
`
`2 b
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`2 c
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`WA-0014215
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`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 11 of 17 PageID #:
`12377
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`Apr. 8, 2014
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`Sheet 8 of 8
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`US 8,690,474 B2
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`Fig.Sc
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`14a
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`10a
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`
`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 12 of 17 PageID #:
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`US 8,690,474 B2
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`1
`ROAD CONSTRUCTION MACHINE,
`LEVELING DEVICE, AS WELL AS METHOD
`FOR CONTROLLING THE MILLING DEPTH
`OR MILLING SLOPE IN A ROAD
`CONSTRUCTION MACHINE
`
`BACKGROUND OF THE INVENTION
`
`TI1e invention relates to a road construction machine, a
`leveling device, and a method.
`It is already known for road milling machines to integrate
`a leveling device by means of which it is to be ensured that an
`even milled surface can be produced.
`The milling depth control system is designed in such a
`fashion that different sensors can be connected. Among oth- 15
`ers, the sensors used include, for example, wire-rope sensors,
`ultrasonic sensors and slope sensors.
`A wire-rope sensor is mounted at the side plates ( edge
`protection) next to the milling drum and thus scans the refer(cid:173)
`ence surface, in this case the road surface, very precisely. The
`ultrasonic sensor operates in a non-contact fashion and is
`therefore not subject to any mechanical wear and tear. It can
`be used in a variety of ways as it can be attached in different
`positions on the machine.
`Ifa defined cross slope is to be produced, a slope sensor can
`also be used which is integrated into the road milling
`machine.
`The known milling depth control system can be provided
`with two independent control loops. A controller is provided
`in each control loop to which the sensors can be connected via
`plug-in connectors. For example, either two height sensors
`are provided, or one height sensor in combination with one
`slope sensor.
`It is unfavorable in the state of the art that the frequent
`change between the many difterent sensors, which is neces(cid:173)
`sary for application-related reasons, is not possible without an
`interruption of the milling operation and without negative
`influences on the work result. To change the current sensor,
`the automatic mode of the control system needs to be left first
`as there is merely one controller, or merely one indication and
`setting device for set values and actual values per controller
`respectively. The new sensor can then be selected, and the
`desired set value can be set before it is possible to change back
`into the automatic mode of the control system. If the road
`milling machine continued milling during changing of the
`sensor, faults in the work result could occur because no con(cid:173)
`trol is effected during that time. The machine therefore needs
`to be stopped for a change of the sensor, which leads to a
`significant time loss. An adverse effect on the work result
`ensues even if the road milling machine is stopped during
`change of the sensor because the milling drum cuts clear
`when standing. This is an unwelcome efft,-ct, in particular
`during fine milling.
`It is therefore the object of the invention to specify a road
`construction machine, as well as a leveling device and a 55
`method for controlling the milling depth and/or the milling
`slope, in which it is possible to change the sensors without any
`interruption of the milling operation.
`
`SUMMARY OF THE INVENTION
`
`The invention provides in a favorable manner that the indi(cid:173)
`cation and setting device of the leveling device, in addition to
`an indication and setting unit provided for the at least one
`sensor currently in use, is provided with an additional indi(cid:173)
`cation and setting unit t,x a selectable sensor which is to be
`exchanged for the sensor currently in use. Providing a further
`
`5
`
`2
`indication and setting unit offers the advantage that the new
`sensor, which is to be exchanged for a sensor currently in use,
`can be prepared for the time of switchover in terms of its
`actual and set values while the operation continues. At the
`time of switchover, the sensor can therefore be changed with(cid:173)
`out any alteration of the currently applicable adjustment
`value. The leveling device is provided with a device for the
`switchover of sensors which, upon activation of a switchover
`command, effects switchover of the leveling device from the
`10 at least one current sensor to at least one pre-selected other
`sensor without interruption of the milling operation and with(cid:173)
`out any erratic alteration of the current adjustment value for
`the setting of the milling depth and/or for the setting of the
`slope of the milling drum.
`TI1e switchover device, with the indication and setting
`device, enables a pre-selection of the other sensor and the
`pre-setting of operating parameters (set values and actual
`values) of the other pre-selected sensor.
`In this way, a machine operator can already prepare the
`20 switchover of the sensors during the milling operation so that
`switchover of the sensors is possible at the push of a button
`without any time loss and without an interruption of the
`milling operation.
`For this purpose, the leveling device is provided with an
`25 indication and setting device which is capable of indicating
`and altering the data of the current sensor and the data of the
`pre-selected sensor. By means of the switchover device,
`switching over from the current sensor to the pre-selected
`sensor can be effected during the milling operation without
`30 any repercussion on the work result.
`One embodiment of the invention provides that the cur(cid:173)
`rently measured actual value for the milling depth and/or for
`the slope of the milling drum of the at least one pre-selected
`other sensor can be set, latest at the time of switchover, to the
`35 same, last measured actual value for the milling depth and/or
`for the slope of the previously used sensor.
`It is therefore possible, when changing the sensor, to apply
`the actual value of the sensor last used, so that the adjustment
`value for the setting of the milling depth and/or for the setting
`40 of the slope of the milling drum is not altered on account of the
`change, and that the evenness of the milled road surface is not
`adversely affected by the change of the sensor.
`An alternative embodiment provides that the set value for
`the milling depth and/ or for the slope of the milling drum can
`45 be set, latest at the time of switchover, to the currently mea(cid:173)
`sured actual value for the milling depili of the at least one
`pre-selected sensor.
`Equating the set value to the currently measured actual
`value of the pre-selected sensor which will replace the previ-
`50 ous sensor ensures that no alteration of the adjustment value
`for the setting of the milling depth and/or the slope will be
`made at the time of switchover.
`A third embodiment provides that, in case of a deviation of
`the measured actual values of the selected other sensor from
`the previously used sensor, the adjustment value for the set(cid:173)
`ting of the milling depth and/or the setting of the slope can be
`altered by means of a pre-seeable transition function.
`According to a further alternative, it is therefore provided
`that, in case that an alteration of the current adjustment value
`60 results on account of the switchover of the sensors, said
`alteration follows a pre-setable transition function starting
`from an adjustment value of 0. It is thereby achieved that the
`alteration ofilie adjustment value is no t effocted in an erratic
`fa shion, so that the evenness of the milled road surface is not
`65 adversely affected and adaptation to ilie adjustment value
`resulting on account of the switchover is effected over a
`longer distance, for example, over 10 m or more.
`
`WA-0014217
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`

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`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 13 of 17 PageID #:
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`3
`It is preferably provided that the leveling device is provided
`with two controllers, the sensors of which are arranged par(cid:173)
`allel to the rotating axis of the milling drum at a lateral
`distance to one another, and which preferably control the
`milling depth independently of one another on the left and 5
`right side of the machine.
`According to the method for controlling the milling depth
`or the milling slope of the milling drum of a road construction
`machine by registering the current actual value of the milling
`depth and/or of the slope of the milling drum relative to a 10
`reference surface using at least one exchangeable or switch(cid:173)
`able sensor, where a milling depth control and/or a slope
`control of the milling drum is effected conditional on pre(cid:173)
`determined set val ues and currently measured actual values
`during the milling operation by returning an adjustment value 15
`for achieving or maintaining the set value, it is provided that,
`when exchanging a currently used sensor for a pre-selected
`other sensor, control of the milling depth and/or the slope is
`effected without interruption of the milling operation by set(cid:173)
`ting the set values and actual values of the sensor, prior to 20
`switchover, by means of an additional indication and setting
`unit in such a fashion that the current adjustment value for the
`setting of the milling depth and/or for the setting of the slope
`of the milling drum is not altered in an erratic fashion.
`Upon activation of a switchover command for the switcho- 25
`ver of sensors, the control is effocted without an interruption
`of the milling operation and without an erratic alteration of
`the current adjustment value for the setting of the milling
`depth and/or for the setting of the slope of the milling drum.
`The road surface or a defined horizontal plane pre-deter- 30
`mined, for instance, by a laser, or any other freely definable
`pre-selected surface can be used as reference surface, which
`may show a different slope or gradient (positive or negative)
`in the course of the road surface.
`In the following, embodiments of the invention are 35
`explained in more detail with reference to the drawings.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 shows a road construction machine.
`FIG. 2 shows a leveling device.
`FIG. 3 shows an indication and setting device.
`FIG. 4 shows a matching of the actual values of different
`sensors at switchover.
`FIG. 5 shows a matching of the set value to the actual value 45
`of a new sensor at switchover.
`FIG. 6a and FIG. 6b shows the change from a milling depth
`control to a milling slope control.
`FIG. 7a through FIG. 7c shows the switchover procedure
`with matching of the set values.
`FIG. Sa to FIG. Sd shows a switchover with matching of the
`actual and set values.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENTS OF THE DRAWINGS
`
`4
`actual value of the milling depth and/or the slope of the
`milling drum 3 relative to a reference surface, which may
`consist in the road surface 12, a pre-determined horizontal
`plane or a freely definable, for instance, mathematically pre(cid:173)
`determined plane or surface.
`The at least one controller 6a, 6c effects a milling depth
`control and/or a slope control for the milling drum 3 condi(cid:173)
`tional on pre-determined set values and the currently mea(cid:173)
`sured actual values of the at least one sensor A, B, C, with an
`adjustment value being returned for achieving or maintaining
`the set value in the milling operation. As follows from FIG. 2,
`the leveling device 4 is provided wi th an indication and set(cid:173)
`ting device which is divided into three nearly identical indi-
`cation and setting units 2a, 2b, 2c. The indication and setting
`device 2 serves the purpose of setting operating parameters
`for the sensors A, B, C. Set values and actual values of the
`sensors A, 13, C can be set in each indication and setting unit
`2a, 2b, 2c. The indication and setting units 2a and2c right and
`left are each connected to a controller 6a, 6c which can be
`activated by means of an automatic button to effect the cor(cid:173)
`responding control automatically. The controllers remain in
`automatic mode during switchover. The adjustment value of
`the controllers 6a, 6c resulting from the difference of the set
`value and actual value is indicated qualitatively by arrows 14,
`with the indication unit being capable of indicating the verti -
`cal traverse speed of the machine proportionally, meaning
`quantitatively, as well. The pre-determined set values and
`actual values of the central indication and setting unit 2b,
`which is coupled to a selectable sensor B that is to be
`exchanged for the currently used sensor A or C, can be inter-
`changed, by means of a switchover device 10a or 10b, with
`the set values and actual values of the sensor A or C that is to
`be exchanged for a selectable other sensor B.
`The embodiment shows a version in which one controller
`each 6a, 6c is provided for one side of the road construction
`machine 1. It is understood that the indication and setting
`device 2 may also be provided with merely two indication and
`setting units if merely one controller is present, where one
`40 sensor is exchanged for another selectable sensor.
`Toe number of indication and setting units provided is
`therefore always larger by one than the number of the sensors
`in use.
`FIG. 2 shows the connection of sensors A, B, C to the
`leveling device 4 with two controllers 6a , 6c, where the lev(cid:173)
`eling device is provided with an indication and setting device
`2 with three indication and setting units 2a, 2b, 2c.
`FIG. 3 shows an embodiment of the indication and setting
`device 2, wherein setting buttons 16 (up and down) for the
`so setting of set values, as well as setting buttons 18 (up and
`down) for the adjustment of measured actual values are
`present for each indication and setting unit 2a, 2b, 2c.
`The currently adjusted set values and the currently mea(cid:173)
`sured actual values of the sensors A, B, Care indicated on the
`55 displays 20 of the indication and setting units 2a, 2b, 2c. The
`direction of a possibly set slope of the milling drum can also
`be indicated on the displays 20. Furthermore, units are indi(cid:173)
`cated, for example, in inch or cm, or percentages in % relating
`to the value indicated.
`A choice of sensors is indicated at the lower end 22 of the
`display 20, enabling a machine operator to determine by
`means of the current indication as to which type of sensor is
`currently indicated on the indication and setting unit 2a, 2b,
`2c. The symbols represent, from left to right, a wire-rope
`sensor, a slope sensor, an ultrasonic sensor, a multiplex sen(cid:173)
`sor, a total station, as well as a laser for pre-determining the
`reference surface.
`
`FIG. 1 shows a road machine 1 for the treatment of road
`surfaces with a milling drum 3 height-adjustable with regard
`to the milling depth. The front travel drive unit supports itself
`on, for instance, the road surface 12, which can serve as 60
`reference surface for a milling depth control or slope control.
`For this purpose, the road machine 1 is provided with a
`leveling device 4 with at least one controller 6a, 6c which
`receives set values for the milling depth and/ or the slope of the
`milling drum 3. Exchangeable sensors A, B, C can be con- 65
`nected to the controllers 6a, 6c of the leveling device 4. The
`sensors A, B, C serve the purpose of registering the current
`
`WA-0014218
`
`

`

`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 14 of 17 PageID #:
`12380
`
`US 8,690,474 B2
`
`5
`Above the displays 20, one button each is provided for the
`automatic mode and for the setting mode to set the controller
`parameters. A horn 24, as well as buttons 26 for adjusting the
`height of the travel drive unit may also be provided on the
`indication and setting device 2. Two memory buttons Ml, M2 5
`for memorizing set values are additionally provided below
`the display 20 on the central indication and setting unit 2b.
`Various possibilities of how to avoid an erratic alteration of
`the current adjustment value are explained in FIGS. 4 to 6.
`In the embodiment of FIG. 4, the measured actual value of 10
`the pre-selected sensor B is equated to the last measured
`current actual value of the previously used sensor A at the
`time of switchover.
`In FIG. 5, the pre-determined set value is adapted to the
`currently measured actual value of the pre-selected sensor B 15
`so that, also in this case, there is no alteration of the adjust(cid:173)
`ment value.
`In case of a deviation of the measured actual values of the
`previously used sensor A from the pre-selected new sensor B,
`the adjustment value can, as an alternative to the embodi(cid:173)
`ments of FIGS. 4 and 5, also change into the adjustment value
`that results on account of the differences in the actual values
`by means of a transition function. A temporal transition there(cid:173)
`fore takes place by means of which no erratic alteration of the
`adjustment value can occur.
`FIGS. 6a and 6b show a switchover procedure in compen(cid:173)
`sated condition. FIG. 6a shows the initial situation in which
`the indication and setting unit 2c, which is linked to the
`controller 6c, is to be switched over from the operating mode
`milling depth (set value 10.0 cm) to the operating mode
`milling slope (set value 2'1/c,). Switchover takes place in com(cid:173)
`pensated condition. Ibis means that the respective actual
`value on both sides of the machine corresponds to the set
`value, and that the adjustment value is therefore 0 on both
`sides. The compensated condition is indicated by the indica(cid:173)
`tion and setting device 14a, 14c through a horizontal bar. It is
`evident from FIG. 6b that, when actuating the switchover
`button 10b of the switchover device 10, the pre-selected set
`values and actual values are interchanged from the indication
`and setting unit 2b to the indication unit 2c, and are taken as 40
`the basis in continued automatic mode for a mixed milling
`depth and milling slope control.
`FIGS. 7a to 7cshow the switchover procedure with match(cid:173)
`ing of the set values.
`In this example, the adjustment values on both sides of the 45
`machine are unequal 0. The indication and setting unit 2c of
`the controller 6c is switched over from milling depth control
`to milling slope control. The set value of the slope is adapted
`manually in FIG. 7b by actuating the buttons 16, so that no
`erratic alteration of the adjustment value will occur. It is 50
`assumed in this example that the adjustment value is propor(cid:173)
`tional to the control deviation (P controller), and that the
`proportionality factor for the milling depth and milling slopes
`is equal numerically. The control deviation is 0.3 cm for the
`milling depth (indication and setting unit 2c in FIG. 7 a), and 55
`0.6% for the milling slope (indication and setting unit 2b in
`FIG. 7a) so that the adjustment value would therefore double
`in terms of value after switchover. In order to match the
`control deviation, the set value of the slope is reduced to 2.0,
`which results in an equal control deviation numerically. This 60
`can be effected manually via the button 16 "reduce set value",
`or automatically, for example, via the button combination 16,
`18 "increase actual value and reduce set value" (FIG. 7b).
`By actuating the switchover button 10b in the illustration
`according to FIG. 7c, the set value and actual value of the 65
`milling slope is applied, as indicated by arrows in FIG. 7c. In
`this process, the adjustment value remains unchanged.
`
`6
`An additional embodiment not shown may provide auto(cid:173)
`matic matching of the set values. In such an embodiment, the
`alteration of the set values in the embodiment of FIGS. 7a to
`7c mentioned before is effected automatically when the
`switchover button 10b ( or 1 Oa) is actuated in automatic mode.
`The first step of the manual alteration of the values in the
`central indication and setting unit 2b (FIG. 7) can then be
`dispensed with as it is effected automatically.
`A further variant not shown consists in altering, in case of
`a deviation of the actual values, the adjustment value by
`means of a pre-set transition function, starting from the cur(cid:173)
`rent adjustment value.
`FIGS. Sa and 8d show an embodiment with matching of the
`actual values and set values.
`The initial situation shown in FIG. Sa indicates, with
`regard to the controller 6c on the right side, the values of a
`milling depth sensor C, for example, a wire-rope sensor
`mounted at the edge protection, while the central indication
`and setting unit 2b indicates the values of a milling depth
`20 sensor B, for example, an ultrasonic sensor with scanning
`point in front of the milling drum.
`The milling depth sensor C is to be replaced by the milling
`depth sensor B, where the set values and actual values of the
`two sensors B, C do not match. However, the current adjust-
`25 ment value equals 0, as is evident from the indication device
`14a, 14c.
`As sensor B is adjusted differently, its actual value does not
`match the actual value of sensor C. It can be equated to the
`actual value of sensor A by means of the actual value setting
`30 buttons 18 either manually or automatically, for example, by
`keeping the two actual value setting buttons 18 pressed for an
`extended period of time.
`FIGS. 8c and 8d show the matching procedure of the set
`values. As the set value of the two sensors B, C relates to the
`35 milling depth on the right, the set value of sensor B is to be
`adapted to the set value of sensor C. This can be effected via
`set value setting buttons or automatically, for example, by
`keeping the two set value setting buttons pressed for an
`extended period of time.
`Following actuation of the right switchover button 10b, the
`set value and actual value of sensor Bare applied. The adjust(cid:173)
`ment value remains 0 and is thus unchanged.
`All embodiments indicate the set values and actual values
`of the pre-selected sensor B, which is to be exchanged for a
`previously used sensor C, in the indication and setting unit 2b.
`It is possible in this way to pre-set all setting values (set values
`and actual values) of the pre-selected sensor B, and to adapt
`them to the previously used sensors A, C or their set values or
`actual values respL'Ctively even prior to entering a switchover
`command via the switchover buttons 1 Oa or 1 Ob. Upon actua(cid:173)
`tion of the switchover button 10a of the switchover device 10,
`the pre-selected sensor is exchanged with the sensor A that is
`currently used on the left side of the road construction
`machine 1.
`As already explained before in com1ection with the
`embodiment ofFIG. 7, insteadofeffecting equalizationofthe
`set values manually, equalization of the set values can also be
`effected automatically when actuating the switchover button
`10b (or 10a) in automatic mode.
`Although a preferred embodiment of the invention has
`been specifically illustrated and described herein, it is to be
`understood that minor variations may be made in the appara(cid:173)
`tus without departing from the spirit and scope of the inven(cid:173)
`tion, as defined by the appended claims.
`What is claimed is:
`1. A method of controlling at least one position character(cid:173)
`istic of a milling drum of a road construction machine, the at
`
`WA-0014219
`
`

`

`Case 1:17-cv-00770-JDW-MPT Document 119-9 Filed 11/17/22 Page 15 of 17 PageID #:
`12381
`
`US 8,690,474 B2
`
`5
`
`15
`
`7
`least one position characteristic being from the group con(cid:173)
`sisting of the milling depth of the drum and the slope of the
`drum, the method comprising:
`(a) setting a set value for an operational parameter of at
`least one sensor, the operational parameter correspond-
`ing to at least one of the milling depth of the drum and the
`slope of the drum;
`(b) conducting a milling operation;
`( c) during the milling operation, sensing a current actual
`value of the operational parameter of the at least one 10
`sensor;
`( d) generating an adjustment value with a controller, the
`adjustment value correlating to a difference between the
`set value and the current actual value of the operational
`parameter of the at least one sensor;
`( e) controlling the at least one position characteristic based
`on the adjustment value;
`(f) without interrupting the milling operation, switching
`over the control of the at least one position characteristic
`from control based at least in part on the at least one 20
`sensor to control based at least in part on a replacement
`sensor not included in the at least one sensor, and
`(g) changing at least one of a set value of an operational
`parameter of the replacement sensor and a current mea(cid:173)
`sured actual value of the operational parameter of the 25
`replacement sensor such that the adjustment value is
`unchanged at the time of switching over.
`2. The method of claim 1, wherein:
`step (g) comprises matching the current measured actual
`value for the operational parameter of the replacement 30
`sensor and the set value of the operational parameter of
`the replacement sensor.
`3. The method of claim 2, wherein:
`in step (g), the matching comprises setting the set value for
`the operational parameter of the replacement sensor to 35
`the current measured actual value of the operational
`parameter of the replacement sensor.
`4. The method of claim 1, wherein:
`step (g) comprises setting the current actual value for the
`operational parameter of the replacement sensor to a last 40
`measured actual value of the operational parameter of
`the at least one sensor.
`5.