US3238648A - Bulldozer with adjustable stinger bit - Google Patents

Bulldozer with adjustable stinger bit Download PDF

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Publication number
US3238648A
US3238648A US332388A US33238863A US3238648A US 3238648 A US3238648 A US 3238648A US 332388 A US332388 A US 332388A US 33238863 A US33238863 A US 33238863A US 3238648 A US3238648 A US 3238648A
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US
United States
Prior art keywords
blade
bulldozer
stinger
bit
adjustable
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
Application number
US332388A
Inventor
Delwin E Cobb
Lloyd K Heinold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Priority to US332388A priority Critical patent/US3238648A/en
Priority to GB47127/64A priority patent/GB1035880A/en
Priority to FR997632A priority patent/FR1416808A/en
Priority to DE1484643A priority patent/DE1484643C3/en
Application granted granted Critical
Publication of US3238648A publication Critical patent/US3238648A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7609Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
    • E02F3/7618Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers with the scraper blade adjustable relative to the pivoting arms about a horizontal axis
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • E02F3/815Blades; Levelling or scarifying tools
    • E02F3/8152Attachments therefor, e.g. wear resisting parts, cutting edges
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80Component parts
    • E02F3/815Blades; Levelling or scarifying tools
    • E02F3/8155Blades; Levelling or scarifying tools provided with movable parts, e.g. cutting discs, vibrating teeth or the like

Definitions

  • Earth working blades on some implements such as earth moving scrapers are provided with a stinger bit or blade portion which extends forwardly or downwardly of the main cutting edge. This reduces the force and traction necessary to move the blade forwardly through hard packed or virgin soil.
  • Such stinger bits have seldom been employed on bulldozer blades because they prevent normal clean up or grading work which are functions of bulldozers after initial pioneering or rough work is complete.
  • the function of a stinger bit is nonetheless highly desirable in bulldozer operations because it enables the making of a reasonably deep cut through material so hard that it overtaxes the tractor engine and tractive ability when the full width of the blade is penetrating the earth.
  • a short blade is also desirable when resistance to cutting is greater toward one end of the blade.
  • a further object of the invention is to provide power means controllable by a tractor operator for adjusting the position of such a bit from the operators station.
  • FIG. 1 is a view in side elevation of a tractor carrying a bulldozer embodying the present invention
  • FIG. 2 is an enlarged end elevation with parts in section of the bulldozer blade shown in FIG. 1 with the stinger bit retracted;
  • FIG. 3 is a view like FIG. 2 showing the stinger b-it advanced downwardly;
  • FIG. 4 is a view in rear elevation of the blade and adjustable stinger bit.
  • FIG. 5 is a view in front elevation of the blade and stinger bit showing positions of the tractor wheels and advanced stinger bit in broken lines.
  • the invention is applicable to bulldozers mounted either on track type or wheel type tractors but is shown for purposes of illustration in FIG. 1 as associated with a wheel type tractor of known kind illustrated generally at 10.
  • a bulldozer blade 11 is mounted forwardly of the tractor by means of conventional push arms 12.
  • the blade is adapted to be raised and lowered by hydraulic jack means represented at 13 and pitch or tilt of the blade may be adjusted through conventional adjustable tilt braces one of which is shown at 14.
  • the conventional cutting edge of a bulldozer blade which is a hardened plate secured to its lower forward portion is in accordance with the present invention formed, as clearly illustrated in FIG. 5 of three separate portions 16, 17 and 18.
  • the portions 16 and 17 are rigidly secured to the blade itself and the central portion 18, which is preferably approximately /3 of the width of the blade, is adjustable so that it may be lowered to penetrate the earth as illustrated in FIGS. 1 and 3 while the fixed blades 16 and 17 are disposed at or above ground level.
  • a plate 20 carried by a pair of arms 21 pivotally connected as at 22 to pairs of spaced brackets 23 (see FIGS. 2, 3 and 4) welded or otherwise firmly secured to the back of the main bulldozer blade structure 11.
  • the stinger bit 18 is disposed for movement between its upper position shown in FIG. 2 where it moves on the same level as the cutting edges 16 and 17 and its lowered position shown in FIG. 3 where it penetrates the earth while the cutting edges 16 and 17 are disposed at ground level.
  • a skid plate 25 is supported by a bracket 26 behind the stinger bit and registers with a conventional skid plate 27 shown in dotted lines in FIG.
  • any suitable power means may be employed which is capable of adjustment from the tractor operators station.
  • Such power means is herein shown as a pair of hydraulic jacks 28 mounted by trunnions 29 and bearings 30 at the upper end of the brackets 23 and having rods pivotally connected as at 31 with the arms 21.
  • a well known and conventional circuit, not herein shown, may be employed for adjusting the jacks 28 with a control valve at the operators station.
  • the jacks are preferably protected from rock or debris spilling over the top of the bulldozer blade by canopies such as shown at 33 secured to and extending rearwardly from the upper rear surface of the bulldozer blade.
  • the width of the stinger bit is approximately of the width of the entire bulldozer blade but, in any event, should not exceed the space between the wheels or tracks of the tractor upon which the bulldozer is mounted.
  • the bit 18 shown in broken lines in its extended position will make a relatively narrow out leaving full traction on firm ground for the tractor wheels.
  • a bulldozer having a blade, said blade having to transversely spaced and aligned cutting edges secured forwardly of the lower edge of the blade adjacent its ends, a third cutting edge in the space between the first cutting edges, and means supporting the third cutting edge for movement between a position substantially aligned with the first cutting edges so as to define a scraper and a lower position for use as a stinger bit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Soil Working Implements (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)

Description

March 8, 1966 D. E. COBB ETAL BULLDOZER WITH ADJUSTABLE STINGER BIT 5 Sheets-Sheet 1 Filed Dec. 23, 1963 INVENTORS.
ATTORNEYS March 8, 1966 5, 055 ET AL BULLDOZER WITH ADJUSTABLE STINGER BIT 5 Sheets-Sheet 2 Filed Dec. 23, 1963 1 INVENTORS.
DELWIN E, CoBB LLOYD K. HEINOLD ATT ORNEYS March 8, 1966 D. E. cows ET AL 3,238,648
BULLDOZER WITH ADJUSTABLE STINGER BIT Filed Dec. 25, 1963 5 Sheets-Sheet 5 INVENTORS.
DELWIN E. COBB "I H BYLLOYD K. HEJNOLD ATTORNEYS United States Patent 3,238,648 BULLDOZER WITH ADJUSTABLE STINGER BIT Delwin E. Cobb and Lloyd K. Heinold, Peoria, 111., assignors to Caterpillar Tractor Co., Peoria, Ill., a corporation of California Filed Dec. 23, 1963, Ser. No. 332,388 2 Claims. (Cl. 37-144) This invention relates to bulldozers and particularly to a bulldozer blade having a portion of its cutting edge adjustable or advanceable downwardly to penetrate the earth while the remainder of the blade is at or above ground level.
Earth working blades on some implements such as earth moving scrapers are provided with a stinger bit or blade portion which extends forwardly or downwardly of the main cutting edge. This reduces the force and traction necessary to move the blade forwardly through hard packed or virgin soil. Such stinger bits have seldom been employed on bulldozer blades because they prevent normal clean up or grading work which are functions of bulldozers after initial pioneering or rough work is complete. The function of a stinger bit is nonetheless highly desirable in bulldozer operations because it enables the making of a reasonably deep cut through material so hard that it overtaxes the tractor engine and tractive ability when the full width of the blade is penetrating the earth. A short blade is also desirable when resistance to cutting is greater toward one end of the blade. For example, in the course of pioneering operations one end of the blade often penetrates the earth more deeply than the other or encounters areas of highly compacted earth or rock. The resulting intermittent loading of an outer end of the blade makes steering difiicult and tends to cause skewing of the tractor from its intended course.
It is therefore an object of the present invention to provide a bulldozer with an adjustable or retractable stinger bit to enable the blade to be used optionally for normal or stinger bit operations.
A further object of the invention is to provide power means controllable by a tractor operator for adjusting the position of such a bit from the operators station.
Further and more specific objects and advantages of the invention and the manner in which it is carried into practice are made apparent in the following specification wherein reference is made to the accompanying drawings.
In the drawings:
FIG. 1 is a view in side elevation of a tractor carrying a bulldozer embodying the present invention;
FIG. 2 is an enlarged end elevation with parts in section of the bulldozer blade shown in FIG. 1 with the stinger bit retracted;
FIG. 3 is a view like FIG. 2 showing the stinger b-it advanced downwardly;
FIG. 4 is a view in rear elevation of the blade and adjustable stinger bit; and
FIG. 5 is a view in front elevation of the blade and stinger bit showing positions of the tractor wheels and advanced stinger bit in broken lines.
The invention is applicable to bulldozers mounted either on track type or wheel type tractors but is shown for purposes of illustration in FIG. 1 as associated with a wheel type tractor of known kind illustrated generally at 10. A bulldozer blade 11 is mounted forwardly of the tractor by means of conventional push arms 12. The
"ice
blade is adapted to be raised and lowered by hydraulic jack means represented at 13 and pitch or tilt of the blade may be adjusted through conventional adjustable tilt braces one of which is shown at 14. The conventional cutting edge of a bulldozer blade which is a hardened plate secured to its lower forward portion is in accordance with the present invention formed, as clearly illustrated in FIG. 5 of three separate portions 16, 17 and 18. The portions 16 and 17 are rigidly secured to the blade itself and the central portion 18, which is preferably approximately /3 of the width of the blade, is adjustable so that it may be lowered to penetrate the earth as illustrated in FIGS. 1 and 3 while the fixed blades 16 and 17 are disposed at or above ground level.
To support the stinger bit for adjustment it is secured to the forward face of a plate 20 carried by a pair of arms 21 pivotally connected as at 22 to pairs of spaced brackets 23 (see FIGS. 2, 3 and 4) welded or otherwise firmly secured to the back of the main bulldozer blade structure 11. Through this construction the stinger bit 18 is disposed for movement between its upper position shown in FIG. 2 where it moves on the same level as the cutting edges 16 and 17 and its lowered position shown in FIG. 3 where it penetrates the earth while the cutting edges 16 and 17 are disposed at ground level. A skid plate 25 is supported by a bracket 26 behind the stinger bit and registers with a conventional skid plate 27 shown in dotted lines in FIG. 3, one of which is disposed behind each of the cutting edges 16 and 17. Consequently when the stinger bit is raised as in FIG. 2 all three skid plates can ride on the surface of the earth in the normal manner for clean-up operations and the like and the skid plates 27 can ride in the same manner when the stinger bit is lowered beneath the surface as shown in FIG. 3. In the position of FIG. 3 earth cut and moved forwardly by the stinger bit will be advanced in the usual manner by the entire blade because of the ground level positions of the cutting edges 16 and 17. The plate 20 is, as shown in FIG. 3, extended upwardly to provide a portion 204: which fills the void between the cutting edges 16 and 17 when the stinger bit is in its lowered position.
In order to adjust the position of the stinger bit any suitable power means may be employed which is capable of adjustment from the tractor operators station. Such power means is herein shown as a pair of hydraulic jacks 28 mounted by trunnions 29 and bearings 30 at the upper end of the brackets 23 and having rods pivotally connected as at 31 with the arms 21. A well known and conventional circuit, not herein shown, may be employed for adjusting the jacks 28 with a control valve at the operators station. The jacks are preferably protected from rock or debris spilling over the top of the bulldozer blade by canopies such as shown at 33 secured to and extending rearwardly from the upper rear surface of the bulldozer blade.
As previously stated the width of the stinger bit is approximately of the width of the entire bulldozer blade but, in any event, should not exceed the space between the wheels or tracks of the tractor upon which the bulldozer is mounted. For example, as illustrated in FIG. 5, where the tractor wheels are indicated at 35, the bit 18 shown in broken lines in its extended position will make a relatively narrow out leaving full traction on firm ground for the tractor wheels.
We claim:
1. In a bulldozer having a blade, said blade having to transversely spaced and aligned cutting edges secured forwardly of the lower edge of the blade adjacent its ends, a third cutting edge in the space between the first cutting edges, and means supporting the third cutting edge for movement between a position substantially aligned with the first cutting edges so as to define a scraper and a lower position for use as a stinger bit.
2. The combination of claim 1 with means movable with the third cutting edge to fill the void between the first two cutting edges when the third edge is used as a stinger bit.
References Cited by the Examiner UNITED STATES PATENTS Dean 37-143 Spoon 37-143 Stout 37-1175 Armington 37-144 Lindberg 37-145 Hoxie 37-145 Cron 37-98 ABRAHAM G. STONE, Primary Examiner.

Claims (1)

1. IN A BULLDOZER HAVING A BLADE, SAID BLADE HAVING TO TRANSVERSELY SPACED AND ALIGNED CUTTING EDGES SECURED FORWARDLY OF THE LOWER EDGE OF THE BLADE ADJACENT ITS ENDS, A THIRD CUTTING EDGE IN THE SPACE BETWEEN THE FIRST CUTTING EDGES, AND MEANS SUPPORTING THE THIRD CUTTING EDGE FOR MOVEMENT BETWEEN A POSITION SUBSTANTIALLY ALIGNED WITH THE FIRST CUTTING EDGES SO AS TO DEFINE A SCRAPER AND A LOWER POSITION FOR USE AS A STINGER BIT.
US332388A 1963-12-23 1963-12-23 Bulldozer with adjustable stinger bit Expired - Lifetime US3238648A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US332388A US3238648A (en) 1963-12-23 1963-12-23 Bulldozer with adjustable stinger bit
GB47127/64A GB1035880A (en) 1963-12-23 1964-11-19 Bulldozer with adjustable stinger bit
FR997632A FR1416808A (en) 1963-12-23 1964-12-07 Adjustable spur button
DE1484643A DE1484643C3 (en) 1963-12-23 1964-12-21 Leveler

Applications Claiming Priority (1)

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US332388A US3238648A (en) 1963-12-23 1963-12-23 Bulldozer with adjustable stinger bit

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US3238648A true US3238648A (en) 1966-03-08

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US332388A Expired - Lifetime US3238648A (en) 1963-12-23 1963-12-23 Bulldozer with adjustable stinger bit

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347577A (en) * 1964-12-24 1967-10-17 Allis Chalmers Mfg Co Pivot construction
US3466770A (en) * 1966-09-16 1969-09-16 Frank W Morrison Self-propelled earth excavating and leveling apparatus
US3528509A (en) * 1968-09-11 1970-09-15 Clark Equipment Co Bulldozer blade with extendible cutting edge
US3789524A (en) * 1972-10-10 1974-02-05 D Mashuda Pipe cradler attachment for excavator bucket
US3897641A (en) * 1974-04-19 1975-08-05 Caterpillar Tractor Co Stinger bit for loader buckets
US3941262A (en) * 1974-02-01 1976-03-02 Caterpillar Tractor Co. Pivotally disposable bucket
US5392864A (en) * 1992-05-01 1995-02-28 Balderson Inc. Blade assembly for a compacting vehicle
US5603172A (en) * 1994-11-14 1997-02-18 Maher; Richard J. Selectively reversible resilient plow blade and kit
WO2006015498A1 (en) * 2004-08-12 2006-02-16 Volvo Motor Graders Limited Cutting edge with trailing wear plate
US20080127532A1 (en) * 2006-12-01 2008-06-05 Reid Robert L Excavation bucket assembly
US20100031538A1 (en) * 2006-09-04 2010-02-11 Agrator Pty Ltd. as trustee for Gessner Unit Trust Blade assembly for an excavating apparatus
US8479838B1 (en) 2011-12-21 2013-07-09 Caterpillar Inc. Dozing blade assembly, cutter and dozing method
US8602122B2 (en) 2011-12-21 2013-12-10 Caterpillar Inc. Track-type tractor, dozing blade assembly, and dozing blade with steep center segment
US8631596B2 (en) 2011-01-20 2014-01-21 Ben Tulibaski Material-handling bucket with scraper blade
US8701313B2 (en) * 2006-09-04 2014-04-22 Spadeblade Pty Ltd Blade assembly for an excavating apparatus
US8783376B2 (en) 2012-08-09 2014-07-22 Caterpillar Inc. Cutter for dozing blade, service package, and method
US20140222301A1 (en) * 2009-09-04 2014-08-07 Philip Paull Apparatus for adapting a hoe bucket for depth control
US9562343B2 (en) 2013-10-16 2017-02-07 Philip Paull Cable-laying plow attachment for a backhoe and method for using the same
US9611620B2 (en) 2009-09-04 2017-04-04 Philip Paull Apparatus and method for enhanced grading control
US9670641B2 (en) 2009-09-04 2017-06-06 Philip Paull Valve systems and method for enhanced grading control
US9777465B2 (en) 2009-09-04 2017-10-03 Philip Paull Apparatus and method for enhanced grading control
US10161112B2 (en) 2015-05-22 2018-12-25 Philip Paull Valve systems and method for enhanced grading control

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1876867A (en) * 1931-10-07 1932-09-13 Charles G Willett Spring grader and moldboard
US1944307A (en) * 1931-12-08 1934-01-23 William L Spoon Channeler attachment to road grading machines
US2029122A (en) * 1935-01-12 1936-01-28 John C Wynecoop Grading machine
US2052929A (en) * 1932-10-27 1936-09-01 Honeywell Regulator Co Electrically operated fluid flow controlling mechanism
US2899760A (en) * 1954-04-20 1959-08-18 Multi-purpose bulldozer blade
US2993285A (en) * 1959-07-09 1961-07-25 Herbert G Hoxie Scarifier attachment for bulldozers
US3039209A (en) * 1959-03-13 1962-06-19 James C Cron Ditch forming attachment for a road grader

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1876867A (en) * 1931-10-07 1932-09-13 Charles G Willett Spring grader and moldboard
US1944307A (en) * 1931-12-08 1934-01-23 William L Spoon Channeler attachment to road grading machines
US2052929A (en) * 1932-10-27 1936-09-01 Honeywell Regulator Co Electrically operated fluid flow controlling mechanism
US2029122A (en) * 1935-01-12 1936-01-28 John C Wynecoop Grading machine
US2899760A (en) * 1954-04-20 1959-08-18 Multi-purpose bulldozer blade
US3039209A (en) * 1959-03-13 1962-06-19 James C Cron Ditch forming attachment for a road grader
US2993285A (en) * 1959-07-09 1961-07-25 Herbert G Hoxie Scarifier attachment for bulldozers

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347577A (en) * 1964-12-24 1967-10-17 Allis Chalmers Mfg Co Pivot construction
US3466770A (en) * 1966-09-16 1969-09-16 Frank W Morrison Self-propelled earth excavating and leveling apparatus
US3528509A (en) * 1968-09-11 1970-09-15 Clark Equipment Co Bulldozer blade with extendible cutting edge
US3789524A (en) * 1972-10-10 1974-02-05 D Mashuda Pipe cradler attachment for excavator bucket
US3941262A (en) * 1974-02-01 1976-03-02 Caterpillar Tractor Co. Pivotally disposable bucket
US3897641A (en) * 1974-04-19 1975-08-05 Caterpillar Tractor Co Stinger bit for loader buckets
US5392864A (en) * 1992-05-01 1995-02-28 Balderson Inc. Blade assembly for a compacting vehicle
US5603172A (en) * 1994-11-14 1997-02-18 Maher; Richard J. Selectively reversible resilient plow blade and kit
WO2006015498A1 (en) * 2004-08-12 2006-02-16 Volvo Motor Graders Limited Cutting edge with trailing wear plate
US20070215367A1 (en) * 2004-08-12 2007-09-20 Smart William J Cutting edge with trailing wear plate
US20100031538A1 (en) * 2006-09-04 2010-02-11 Agrator Pty Ltd. as trustee for Gessner Unit Trust Blade assembly for an excavating apparatus
US8701313B2 (en) * 2006-09-04 2014-04-22 Spadeblade Pty Ltd Blade assembly for an excavating apparatus
US8291624B2 (en) * 2006-09-04 2012-10-23 Agrator Pty Ltd As Trustee For Gessner Unit Trust Blade assembly for an excavating apparatus
US20080127532A1 (en) * 2006-12-01 2008-06-05 Reid Robert L Excavation bucket assembly
US7506462B2 (en) * 2006-12-01 2009-03-24 Reid Robert L Excavation bucket assembly
US8875421B2 (en) * 2009-09-04 2014-11-04 Philip Paull Apparatus for adapting a hoe bucket for depth control
US20140222301A1 (en) * 2009-09-04 2014-08-07 Philip Paull Apparatus for adapting a hoe bucket for depth control
US9611620B2 (en) 2009-09-04 2017-04-04 Philip Paull Apparatus and method for enhanced grading control
US9670641B2 (en) 2009-09-04 2017-06-06 Philip Paull Valve systems and method for enhanced grading control
US9777465B2 (en) 2009-09-04 2017-10-03 Philip Paull Apparatus and method for enhanced grading control
US8631596B2 (en) 2011-01-20 2014-01-21 Ben Tulibaski Material-handling bucket with scraper blade
US8602122B2 (en) 2011-12-21 2013-12-10 Caterpillar Inc. Track-type tractor, dozing blade assembly, and dozing blade with steep center segment
US8479838B1 (en) 2011-12-21 2013-07-09 Caterpillar Inc. Dozing blade assembly, cutter and dozing method
US8783376B2 (en) 2012-08-09 2014-07-22 Caterpillar Inc. Cutter for dozing blade, service package, and method
US9562343B2 (en) 2013-10-16 2017-02-07 Philip Paull Cable-laying plow attachment for a backhoe and method for using the same
US10161112B2 (en) 2015-05-22 2018-12-25 Philip Paull Valve systems and method for enhanced grading control

Also Published As

Publication number Publication date
DE1484643A1 (en) 1969-02-13
GB1035880A (en) 1966-07-13
DE1484643B2 (en) 1973-11-08
DE1484643C3 (en) 1974-06-06

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