US3811787A - Screed attached grade reference mechanism - Google Patents
Screed attached grade reference mechanism Download PDFInfo
- Publication number
- US3811787A US3811787A US00278299A US27829972A US3811787A US 3811787 A US3811787 A US 3811787A US 00278299 A US00278299 A US 00278299A US 27829972 A US27829972 A US 27829972A US 3811787 A US3811787 A US 3811787A
- Authority
- US
- United States
- Prior art keywords
- screed
- grade reference
- reference device
- sensor
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/004—Devices for guiding or controlling the machines along a predetermined path
- E01C19/008—Devices for guiding or controlling the machines along a predetermined path by reference lines placed along the road, e.g. wires co-operating with feeler elements
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4866—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing
- E01C19/4873—Apparatus designed for railless operation
Definitions
- the control system for raising and lowering the pivot axes of the draft arms has the sensor thereof supported from the screed adjacent to and forward of the forward portion of the screed; this sensor is engaged by a stringline mounted on said 12 Claims, 8 Drawing Figures 9/l966 3,285,148 ll/1966 3,466,990 9/1969 3,519,770 7/1970 3,618,434 1171971 Long ..404/11s FOREIGN PATENTS 0R APPLICATIONS -41,773 ll/l965 Germany ..404 s4 SHEEI 1 BF 2 FIG .45
- the field of the present invention relates to improvements in road finishing machines or-pavers of the type which lay and finish bituminous or like paving materials along a'roadwa-y or subgrade. More particularly, the present invention relates to a grade reference mechanism forming part of the automatic screed control system for such a paving machine.
- an automatic screed control system for a paver includes'a feeler or sensor which engages an external reference wire or stringline. This-external reference establishes areference plane independently of the paving machine.
- the feeler or sensor activates a control system, usually electrically or hydraulically operated, to vary the screed angle of attack by raising or lowering the pivot points of the draftarms which mount the screed or by pivoting the screed with respect to the draft arms.
- a control system usually electrically or hydraulically operated, to vary the screed angle of attack by raising or lowering the pivot points of the draftarms which mount the screed or by pivoting the screed with respect to the draft arms.
- Such a system permits the paving machine to lay a pavement with a ment.
- this type of grade reference is not the.
- the upper surface thereof may be used as the external grade reference.
- this grade reference may be used will depend on whether such a curb or gutter is available along the particular roadway to be paved. The use of this form of external reference is obviously quite limited.
- a preferred way-of establishing the necessary grade reference datum for an automatic screed control system includes the use of a mobile grade reference device which supports thestringline engaged by the sensor of the control system.
- This mobile grade reference device is towed by the paving machine.
- Such a mobile grade reference device is most often constituted by a beam, ski or straight-edge, of some substantial length, usually 30 feet or so, but in any case of a length at least equal to the span of the track or wheels of the paving machine.
- a mobile grade reference device of this type is preferably constituted by a series of articulated arms supported by plural subgrade engaging skids or wheels; reference is made to,the pending application of Mun-' yon and Beaty, Ser. No. 202,127, filed Nov.
- Such a device spans hollows and sags and lengthens humps byproviding a ramp action on either side thereby ensuring a minimum thickness of material over control systems of the such hump.
- a mobile grade reference device of this form actuates the screed control sensing means such that the hollows and sags are filled with asphalt material and the humps covered with the asphalt material to provide an optimum pavement profile.
- the only practical alternative is to mount the mobile grade reference device forwardly of the screed and within the lat- 'eral extremities thereof.
- a location of the grade reference device resultsin a substantial reductionin accuracy of the automatic control system with consequent unevenness in the pavement profile.
- This undesirable result obtains because the effective length of the mobile grade reference device will be substantially reduced as the sensor will engage the stringline on the mobile grade reference device adjacent the trailing end of the latter and not at its longitudinal midpoint. It will be recalled that according to the teachings of the above mentioned Munyonpatent, the sensor should be mounted. just forwardly of the leading portion of the screed.
- the effective length of the mobile grade reference device will be approximately two times the distance from the trailing end of the grade reference device (which will be located as near the leading edge of the screed as practical) to the point on the stringline established by'engagement of the sensor, the stringline being of course carried by the mobile grade reference device.
- Such an arrangement will level only very short undulations in the subgrade and will more or less reproduce longer deviations from the means grade.
- a grade reference device consisting only of a pair of side-by-side wheels is mounted forwardly of the screed and within the approximate lateral extremities thereof.
- a longitudinally extending beam carrying a stringline is supported at its opposite ends by a pair of vertically disposed, fluid operated cylinders.
- the piston rod of the cylinder at the forward end of the beam is supported by the aforesaid pair of wheels;.the piston rod of the cylinder at the rear end of the beam is supported by the screed.
- a sensor unit is provided to actuate the fluid cylinders in a manner to maintain the beam level or at a predetermined slope.
- a primary object of the present invention is the provision of unique means for attaching a mobile grade reference device to the screed forwardly and within the lateral extremities thereof.
- Another object of the present invention is the .provision of a mobile grade reference mechanism of the type described, which mechanism includes a grade reference beam extending longitudinally of the direction of travel of the paving machine, such beam having the forward end thereof pivotally mounted to the mobile grade reference device at the longitudinal midpoint thereof and at a location rearwardly of the pivot axes of the draft arms for the'screed, such beam having its trailing end pivotally attached to the screed.
- Still another object of the present invention is the provision of a mobile grade reference mechanism as referred to in the preceding object and wherein the sensor engages the longitudinally extending beam at a location forwardly of the leading portion of the screed.
- an asphalt paving machine of well known type is generally designated 10.
- This paving machine includes a screed 12 towed behind the machine by a pair of draft arms, one arm being illustrated and designated 14.
- the draft arms are mounted to the paving machine for pivoting movement the pivot axis for the draft arm 14 is designated 15 (FIG. 4A).
- Power means such as hydraulic cylinders, are attached to the forward ends of the draft arms for raising and lowering the pivot axes thereof for varying the angle of attack of the screed thereby to control the thickness of the pavement layer or lift, all in a manner well known to those skilled in the art.
- the mobile grade reference device generally designated 18, includes a first arm or beam 19 pivotally mounted at its respective opposite ends to the longitudinal midpoints of other arms or subbeams 20 and 21.
- the arm 20 has the opposite ends thereof respectively pivotally engaged with a pair of skids or shoes 23, 24.
- the respective opposite ends of the arm 21 are pivotally engaged with another pair of skids or shoes 25, 26.
- the skids 23 trough 26 engage and slide along the subgrade.
- the tenn subgrade has reference to the surface which is to receive the bituminous or asphalt material being laid by the paving machine, whether such surface is formed by previously laid bituminous material, graded earth or a layer of aggregate placed on the earth.
- the paver 10 mounts a laterally disposed towing arm 28 which is braced by a diagonal arm '29, one end ofthe latter being connected to theframe of the paving machine.
- the distal end of the towing arm 28 is pivotally connected with a towing link 30, the latter being suitably pivotally engaged with a bracket 31 mounted on the arm orsubbeam 20.
- a link 33 one end being pivotally engaged with a bracket 34 on the arm 21 and the other end of such link being pivotally secured to the paver.
- a post or column 36 is rigidly secured to the arm 19 at the longitudinal ,midpoint of the latter and which point is also the longitudinal midpoint of the mobile grade reference device 18.
- This column is telescopingly received within a tube 37; preferably, frictional means adapted to be operated by a handle 38 are provided for adjusting the amount of insertion of the column 36 within the tube 37.
- the upper end of the tube 37 is rigidly connected to an upwardly disposed channel member 40, which member receives one end of a grade reference beam 42. which may be an I-beam or wide flange rolled section.
- a latch spring 43 extends over the beam 42 and has opposite ends thereof suitably secured to the channel member 40.
- the spring 43 provides for connecting and disconnecting the beam 42 and tube 37 and also permits pivotalmovement between the beam 42 and the tube 37, such pivoting movement being about a horizontal axis designated 44 (FIG. 4A).
- this horizonal pivot-axis thereof, which. post in turn mounts a bar 49 in horizontally disposed fashion.
- means are provided for adjustably positioning the bar 49 in a horizontalplane.
- One end of the bar 49 is engaged by a diagonal brace 52, the latter being secured to the post 48.
- the sensing mechanism 55 includes a sensor arm 56, one end of which is engaged with astringline 57, opposite ends of such stringline being secured to upstanding pins 58 secured to the beam 42 adjacent its respective ends.
- the bar 49' mounts the post 54 for.vertical adjustable movement.
- the sensor mechanism 55 ismounted, consistent with the teachings of the above mentioned Munyon patent, forwardly of the forward portion of the screed 12 and preferably adjacent to the forward portion of the screed.
- the beam 42 has a length twice the distance between the rearward pivot point thereof and the point of engagement betweenthe sensor arm 56 and the stringline 57; in other words, the sensor arm engages the stringline at the midpoint of the beam 42
- movement of the sensor armt56 in response to movement of the stringline 57, will activate the control system for actuating the hydraulic rams to raise or lower the pivot axes of the draft arms thereby to vary the angle of attack of the screed, all in a manner well knownto those skilled in the art.
- the Munyon patent for a description of the control system for so raising and lowering the pivot axes of the draft arms.
- FIGS. 4A through 4E The operation of the present invention can be best understood by reference to FIGS. 4A through 4E.
- FIG. 4D illustrates the situation wherein the pivot axis of one or both of the draft arms is movedupwardly as the result of corresponding upwardmovement of the paving machine itself. It is apparent that the sensing arm 56 will be moved so as to actuate theassociated control system to move the pivot axis of one or both of the draft arms downwardly.
- FIG.- 4E illustrates the opposite situation wherein the pivot axis of the draft arm is moved downwardly as the result of corresponding FIG. 4A illustrates the system in what may be termed a static condition. In'such condition, the sensing arm 56 l is in a zero positionjfor establishing the predetermined angle of attack of the screed.
- Disturbances i.e., errors, may be introduced at the screed itself, as well as at the draft arm pivot axes, in
- these errors at the screed can be the result of changes in the forward speed .of the paving machine, changes in mix temperature affecting mix viscosity and variations in the quantity of the mixture in the distribution auger chamber.
- FIGS. 48 and 4C illustrate the manner in which the screed attached grade reference mechanism of the present invention makes corrections'for disturbances at in which the present invention corrects for disturbances or 'movements at the pivot axes of the draft arms in response to vertical displacements of the paving machine as it. travels over humps or hollows in the subgrade.
- FIGS. 4D and 4E illustrate the manner movement of the paving machine, in which situation the sensing arm 56 is moved for raising the pivot axis of the draft arm thereby to restore the screed to its proper angleof attack disposition.
- the automatic screed control system with which thepresent invention is associated include power means for raising and lowering the pivot axes of both draft arms.
- power means may be provided for only one draft arm with manually actuated means being provided for raising and lowering the pivot axis of the other draft arm.
- transverse slope control mechanism As is known to those skilled vided at both sides of the paving machine orat one side of the machine and in combination with transverse slope control mechanism, the latter being shown in the aforementioned Munyon patent.
- the present invention permits the sensor of the sutomatic screed control system to be 10- cated in its optimum position forwardly of the forward portion of the screed. Further, it is apparent that the present invention permits mounting of the mobile grade reference device forwardly of the screed within the lateral extremities thereof and with sensings from the mobile grade reference device being taken at the longitudinal midpoint thereof. It is also noted that the present invention permits the mobile grade reference device to be of rather substantial length which is, of course, a desired feature.
- a paving machine of the type having a screed which is pulled at the rear of the machine by a pair of draft arms, the forward ends of said draft arms being pivotally engaged with the machine, wherein powered actuating means are provided for varying the angle of attack of the screed, and wherein a control system operates said powered actuating means in response to movement of a grade reference sensor, the improvement comprising:
- a mobile grade reference device elongated longitudinally in the direction of travel of the paving machine
- a grade reference beam extending longitudinally of the direction of travel of the paving machine
- rigid connecting means securing the forward end of said beam to said grade reference device intermediate the ends thereof such that vertical movements of the latter are directly transmitted to the former whereby said forward end of said beam and the portion of said grade reference device adjacent said connecting means move vertically in unison, said rigid connecting means including first horizontal pivot means pivotally connecting said forward end of said beam with said grade reference device and defining a horizontal pivot axis located rearwardly of the pivot axes of the draft arms;
- second horizontal pivot means pivotally connecting the rearward end of said beam with the screed
- support means mounting said sensor for movement with the screed and at a location intermediate the ends of said beam;
- said beam including an element engaged by said sensor for moving the latter thereby to activate said v control system in response to relative vertical displacements between said mobile grade reference device and said screed.
- said second pivot means including a member rigidly connected to said screed and upstanding therefrom -so as to cooperate with said rigid connecting means to mount said beam in substantial horizontal disposition and at an elevation above said screed.
- said mobile grade reference device including a plurality of longitudinally extending articulated arms supported from plural subgrade engaging members.
- a mobilegrade reference device including a plurality of articulated arms supported by plural subgrade engaging members, which arms extend longitudinally of the direction of travel of the paving machine;
- rigid connecting means securing the forward end of said beam to said grade reference device intermediate the ends thereof such that vertical movements of the latter are directly transmitted to the former whereby said forward end of said beam and the portion of said grade reference device adjacent said connecting means move vertically in unison, said rigid connecting means including first horizontal pivot means pivotally connecting said forward end of said beam with said grade reference device and defining a horizontal pivot axis located rearwardly of the pivot axes of the draft arms;
- support means mounting said sensor for movement with the screed and at a location intermediate the ends of said beam;
- said beam including an element engaged by said sensor for moving the latter thereby to activate said control system in response to relative vertical displacements between said mobile grade reference device and said screed.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
Description
Claims (12)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00278299A US3811787A (en) | 1972-08-07 | 1972-08-07 | Screed attached grade reference mechanism |
CA171,201A CA981083A (en) | 1972-08-07 | 1973-05-03 | Screed attached grade reference mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00278299A US3811787A (en) | 1972-08-07 | 1972-08-07 | Screed attached grade reference mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
US3811787A true US3811787A (en) | 1974-05-21 |
Family
ID=23064463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00278299A Expired - Lifetime US3811787A (en) | 1972-08-07 | 1972-08-07 | Screed attached grade reference mechanism |
Country Status (2)
Country | Link |
---|---|
US (1) | US3811787A (en) |
CA (1) | CA981083A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4140420A (en) * | 1978-03-16 | 1979-02-20 | Cmi Corporation | Portable grade averaging apparatus |
US4213719A (en) * | 1978-09-28 | 1980-07-22 | Cmi Corporation | Grade averaging apparatus |
US4270801A (en) * | 1979-08-14 | 1981-06-02 | Cmi Corporation | Steering and cutter drum positioning in a paved roadway planing machine |
FR2487397A1 (en) * | 1980-07-22 | 1982-01-29 | Walo Bertschinger Ag | DEVICE FOR LEVELING THE SURFACE OF A CONCRETE CLADDING AND METHOD FOR ITS IMPLEMENTATION |
US4722636A (en) * | 1986-08-04 | 1988-02-02 | Astec Industries, Inc. | Self-adjusting, self-leveling tandem screed |
US4852278A (en) * | 1986-06-27 | 1989-08-01 | Kajima Corporation | Method and apparatus for grading and measuring a surface having a curved profile |
US4948292A (en) * | 1989-07-24 | 1990-08-14 | Cedarapids, Inc. | Paving machine having transversely and longitudinally adjustable grade sensors |
US5356238A (en) * | 1993-03-10 | 1994-10-18 | Cedarapids, Inc. | Paver with material supply and mat grade and slope quality control apparatus and method |
US5607205A (en) * | 1995-06-06 | 1997-03-04 | Caterpillar Inc. | Object responsive implement control system |
US6113310A (en) * | 1997-06-20 | 2000-09-05 | Hesse, Jr.; Ronald | Road repair apparatus and method for pavement patching |
US20120063847A1 (en) * | 2010-09-10 | 2012-03-15 | SMG Sportplatzmachinebau GmbH | Mobile paving machine |
US20200048843A1 (en) * | 2016-10-07 | 2020-02-13 | Anthony Kelly | A compaction compensation system |
US20200050197A1 (en) * | 2018-08-09 | 2020-02-13 | Caterpillar Paving Products Inc. | Navigation system for a machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272099A (en) * | 1963-01-31 | 1966-09-13 | Frank M Drake | Stringline attachment for paving machine |
US3285148A (en) * | 1963-03-01 | 1966-11-15 | Barber Greene Co | Grade control system on bituminous pavers |
US3466990A (en) * | 1967-10-06 | 1969-09-16 | Gordon H Ball Inc | Paving machine |
US3519770A (en) * | 1968-07-19 | 1970-07-07 | Long George | Switching apparatus for servo system |
US3618484A (en) * | 1969-09-11 | 1971-11-09 | Long George | Traveling grade controller |
-
1972
- 1972-08-07 US US00278299A patent/US3811787A/en not_active Expired - Lifetime
-
1973
- 1973-05-03 CA CA171,201A patent/CA981083A/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272099A (en) * | 1963-01-31 | 1966-09-13 | Frank M Drake | Stringline attachment for paving machine |
US3285148A (en) * | 1963-03-01 | 1966-11-15 | Barber Greene Co | Grade control system on bituminous pavers |
US3466990A (en) * | 1967-10-06 | 1969-09-16 | Gordon H Ball Inc | Paving machine |
US3519770A (en) * | 1968-07-19 | 1970-07-07 | Long George | Switching apparatus for servo system |
US3618484A (en) * | 1969-09-11 | 1971-11-09 | Long George | Traveling grade controller |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4140420A (en) * | 1978-03-16 | 1979-02-20 | Cmi Corporation | Portable grade averaging apparatus |
US4213719A (en) * | 1978-09-28 | 1980-07-22 | Cmi Corporation | Grade averaging apparatus |
US4270801A (en) * | 1979-08-14 | 1981-06-02 | Cmi Corporation | Steering and cutter drum positioning in a paved roadway planing machine |
FR2487397A1 (en) * | 1980-07-22 | 1982-01-29 | Walo Bertschinger Ag | DEVICE FOR LEVELING THE SURFACE OF A CONCRETE CLADDING AND METHOD FOR ITS IMPLEMENTATION |
US4852278A (en) * | 1986-06-27 | 1989-08-01 | Kajima Corporation | Method and apparatus for grading and measuring a surface having a curved profile |
US4722636A (en) * | 1986-08-04 | 1988-02-02 | Astec Industries, Inc. | Self-adjusting, self-leveling tandem screed |
US4948292A (en) * | 1989-07-24 | 1990-08-14 | Cedarapids, Inc. | Paving machine having transversely and longitudinally adjustable grade sensors |
US5401115A (en) * | 1993-03-10 | 1995-03-28 | Cedarapids, Inc. | Paver with material supply and mat grade and slope quality control apparatus and method |
US5356238A (en) * | 1993-03-10 | 1994-10-18 | Cedarapids, Inc. | Paver with material supply and mat grade and slope quality control apparatus and method |
US5607205A (en) * | 1995-06-06 | 1997-03-04 | Caterpillar Inc. | Object responsive implement control system |
US6113310A (en) * | 1997-06-20 | 2000-09-05 | Hesse, Jr.; Ronald | Road repair apparatus and method for pavement patching |
US20120063847A1 (en) * | 2010-09-10 | 2012-03-15 | SMG Sportplatzmachinebau GmbH | Mobile paving machine |
US8591141B2 (en) * | 2010-09-10 | 2013-11-26 | SMG Sportsplatzmachinebau GmbH | Mobile paving machine |
US20200048843A1 (en) * | 2016-10-07 | 2020-02-13 | Anthony Kelly | A compaction compensation system |
US11220793B2 (en) * | 2016-10-07 | 2022-01-11 | Anthony Kelly | Compaction compensation system |
US20200050197A1 (en) * | 2018-08-09 | 2020-02-13 | Caterpillar Paving Products Inc. | Navigation system for a machine |
CN110816510A (en) * | 2018-08-09 | 2020-02-21 | 卡特彼勒路面机械公司 | Navigation system for a machine |
US11243531B2 (en) * | 2018-08-09 | 2022-02-08 | Caterpillar Paving Products Inc. | Navigation system for a machine |
CN110816510B (en) * | 2018-08-09 | 2023-11-03 | 卡特彼勒路面机械公司 | paving system |
Also Published As
Publication number | Publication date |
---|---|
CA981083A (en) | 1976-01-06 |
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Legal Events
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AS | Assignment |
Owner name: M & I MARSHALL & ILSELEY BANK, NORTHWESTERN MUTUAL Free format text: SECURITY INTEREST;ASSIGNOR:BARBER-GREENE COMPANY;REEL/FRAME:004246/0253 Effective date: 19840203 |
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Owner name: BARBER-GREENE COMPANY, 400 N. HIGHLAND AVE., AUROR Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO AS AGENT FOR SEE DOCUMENT FORNAMES;REEL/FRAME:004688/0001 Effective date: 19861224 Owner name: BARBER-GREENE COMPANY,ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO AS AGENT FOR SEE DOCUMENT FORNAMES;REEL/FRAME:004688/0001 Effective date: 19861224 |
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Owner name: BARBER-GREENE COMPANY, 400 NORTH HIGHLAND AVENUE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:B.V. OCEANIC FINANCE COMPANY;REEL/FRAME:004730/0767 Effective date: 19861229 Owner name: BARBER-GREENE COMPANY, A DE. CORP.,ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:B.V. OCEANIC FINANCE COMPANY;REEL/FRAME:004730/0767 Effective date: 19861229 |
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Owner name: FIRST AMERICAN NATIONAL BANK OF NASHVILLE, NASHVIL Free format text: SECURITY INTEREST;ASSIGNOR:BARBER-GREENE COMPANY, A CORP. OF DE.;REEL/FRAME:004748/0440 Effective date: 19861229 Owner name: FIRST AMERICAN NATIONAL BANK OF NASHVILLE, TENNESS Free format text: SECURITY INTEREST;ASSIGNOR:BARBER-GREENE COMPANY, A CORP. OF DE.;REEL/FRAME:004748/0440 Effective date: 19861229 |
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Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ILLINOIS Free format text: AMENDMENT TO A PREVIOUSLY RECORDED SECURITY AGREEMENT DATED APRIL 27, 1989;;ASSIGNORS:BARBER-GREENECOMPANY;ROADTEC, INC.;TRENCOR JETCO, INC.;REEL/FRAME:006113/0075 Effective date: 19910301 Owner name: CITIZENS AND SOUTHERN TRUST COMPANY (GEORGIA), GEO Free format text: AMENDMENT TO A PREVIOUSLY RECORDED SECURITY AGREEMENT DATED APRIL 27, 1989;;ASSIGNORS:BARBER-GREENECOMPANY;ROADTEC, INC.;TRENCOR JETCO, INC.;REEL/FRAME:006113/0075 Effective date: 19910301 Owner name: BARBER-GREENE COMPANY, ILLINOIS Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITIZENS AND SOUTHERN TRUST COMPANY (GEORGIA) N.A., AS SECURITY TRUSTEE FOR THE BENEFIT OF FIRST NATIONAL BANK OF CHICAGO, THE ; SEE DOCUMENT FOR OTHER ASSIGNORS.;REEL/FRAME:006129/0278 Effective date: 19910417 |
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Owner name: CATERPILLAR PAVING PRODUCTS INC. AN OK CORPORAT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BARBER-GREENE COMPANY, A CORPORATION OF DE;REEL/FRAME:005957/0281 Effective date: 19910417 |