US3890726A - Rock guard for scraper draft arm - Google Patents

Rock guard for scraper draft arm Download PDF

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Publication number
US3890726A
US3890726A US438286A US43828674A US3890726A US 3890726 A US3890726 A US 3890726A US 438286 A US438286 A US 438286A US 43828674 A US43828674 A US 43828674A US 3890726 A US3890726 A US 3890726A
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US
United States
Prior art keywords
scraper bowl
predetermined distance
draft arm
attached
draft
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
US438286A
Inventor
William T Girard
Thomas R Hamilton
Bennett N Waddell
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 US438286A priority Critical patent/US3890726A/en
Priority to GB2444/75A priority patent/GB1486724A/en
Application granted granted Critical
Publication of US3890726A publication Critical patent/US3890726A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/6454—Towed (i.e. pulled or pushed) scrapers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/64—Buckets cars, i.e. having scraper bowls
    • E02F3/65—Component parts, e.g. drives, control devices
    • E02F3/653—Connection mechanisms to the main body of the machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/219—Guards

Definitions

  • ROCK GUARD FOR SCRAPER DRAFT ARM Inventors: William T. Girard; Thomas R.
  • a wheel-tractor scraper comprises a scraper bowl attached to a tractor by a pair of laterally-spaced draft arms positioned on either side of the scraper bowl.
  • a rock guard is attached on each of the draft arms to extend substantially the entire length thereof and has inner edges positioned closely adjacent to a respective side of the scraper bowl to prevent the wedging of rocks or the like between the draft arm and the scraper bowl.
  • An object of this invention is to overcome the above, briefly described problems by providing an economical and efficient guard means for the draft arms ofa tractor scraper combination.
  • a guard means is attached on each draft arm to extend substantially the entire length thereof and has inner edges thereof spaced a predetermined distance from a respective side of the scraper bowl to prevent large rocks and the like from wedging between each draft arm and a sidewall of the scraper bowl.
  • FIG. 1 is a side elevational view of a wheel-tractor scraper having a guard means of this invention mounted on each draft arm thereof;
  • FIG. 2 is a cross-sectional view through a draft arm and attached guard means, taken in the direction of arrows II-II in FIG. I;
  • FIG. 3 is a top plan view of the draft arm and attached guard means of FIG. 2;
  • FIG. 4 is a view similar to FIG. 2, but showing a modifled embodiment of the guard means.
  • FIG. 1 illustrates a wheel-tractor scraper 10 comprising a tractor portion 11 attached to a scraper portion 12 by a conventional gooseneck 13 and a pair of laterally-spaced draft arms 14.
  • the scraper portion comprises a scraper bowl 15 adapted to be selectively raised or lowered by a pair of conventional lift cylinders 16 (one shown). When the scraper bowl is lowered to a scraping position, raised to a hauling position or transported to a dump site, relative vertical motion occurs between the scraper bowl and draft arms 14.
  • the guard means comprises a flat plate 18 releasably attached to an unon the upper surface of draft arm .14.
  • the plate is at vtached thereon by releasable fastening means, such as cap screws 20, each extending through an elongated slot means 21 to selectively adjust the distance d, between an inner edge 22 of the plate and a sidewall 23 ofscraper bowl 15.
  • edges 22 may be prepositioned in substantial parallel relationship with respect to sidewall 23 at a first predetermined distance d which is substantially less (preferably at least one-half) than a second predetermined distance D, between the inner side of draft arm 14 and sidewall 23.
  • first predetermined distance d which is substantially less (preferably at least one-half) than a second predetermined distance D, between the inner side of draft arm 14 and sidewall 23.
  • FIG. 4 illustrates a modified guard means 17a wherein block 19 (FIG. 2) has been eliminated.
  • block 19 FIG. 2
  • Like numerals depict corresponding structures with the numerals appearing in FIG. 4 being accompanied by a small a.
  • the modified guard means comprises a plate 18a which is releasably attached directly on a draft arm 14a by means of cap screws 20a.
  • Each cap screw extends through an elongated slot 21a to precisely set the distance d between inner edge 22a of plate 18a and a sidewall 23 of the scraper bowl. Such distance is substantially less than distance D, between the inner side of draft arm 14a and sidewall 23.
  • a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl
  • the invention comprising guard means attached on each of said draft arms to extend substantially the entire length thereof and each further extending between an upper surface of a respective draft arm and a respective side of said scraper bowl, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the scraper bowl.
  • each of said guard means comprises a flat plate attached on the upper surface of a respective draft arm by a plurality of releasable fastening means.
  • each of said fastening means projects through an elongated slot means formed through said plate for permitting adjustment of said first predetermined distance.
  • each of said guard means is attached on a block, secured on an upper surface of a respective draft arm.
  • each of said guard means is attached directly on the upper surface of a respective draft arm.
  • a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl, the invention comprising guard means attached on each of said draft arms to extend substantially the entire length thereof, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the

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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)
  • Agricultural Machines (AREA)

Abstract

A wheel-tractor scraper comprises a scraper bowl attached to a tractor by a pair of laterally-spaced draft arms positioned on either side of the scraper bowl. A rock guard is attached on each of the draft arms to extend substantially the entire length thereof and has inner edges positioned closely adjacent to a respective side of the scraper bowl to prevent the wedging of rocks or the like between the draft arm and the scraper bowl.

Description

United States Patent Girard et al.
ROCK GUARD FOR SCRAPER DRAFT ARM Inventors: William T. Girard; Thomas R.
Hamilton; Bennett N. Waddell, all of Joliet, I11.
Caterpillar Tractor Company, Peoria, Ill.
Filed: Jan. 31, 1974 Appl. No.: 438,286
Assignee:
US. Cl 37/124; 74/608; 280/150 R Int. Cl E02f 9/24 Field of Search 37/124-129, 37/8; 172/112, 508, 801; 280/150 R, 150 B, 152 R, 153 R, 159; 308/35; 171/137;
References Cited UNITED STATES PATENTS 11/1951 Sell 37/126A 9/1955 Bartlett.... 37/124 10/1955 Luke 37/124 5/1956 Brimhall 37/129 3/1961 Herron 280/152 R Primary Examiner-E. H. Eickholt Attorney, Agent, or F irm-Phillips, Moore, Weissenberger, Lempio & Strabala [5 7] ABSTRACT A wheel-tractor scraper comprises a scraper bowl attached to a tractor by a pair of laterally-spaced draft arms positioned on either side of the scraper bowl. A rock guard is attached on each of the draft arms to extend substantially the entire length thereof and has inner edges positioned closely adjacent to a respective side of the scraper bowl to prevent the wedging of rocks or the like between the draft arm and the scraper bowl.
7 Claims, 4 Drawing Figures 1 ROCK GUARD FOR SCRA PER DRAFT ARM BACKGROUND OF THE INVENTION I derlying block 1 9 weldedor otherwise suitably secured Wheel-tractorscrapers-are employed in the earth- SUMMARY OF THIS INVENTION An object of this invention is to overcome the above, briefly described problems by providing an economical and efficient guard means for the draft arms ofa tractor scraper combination. A guard means is attached on each draft arm to extend substantially the entire length thereof and has inner edges thereof spaced a predetermined distance from a respective side of the scraper bowl to prevent large rocks and the like from wedging between each draft arm and a sidewall of the scraper bowl.
BRIEF DESCRIPTION OF THE DRAWINGS Other objects of this invention will become apparent from the following description and accompanying drawings wherein:
FIG. 1 is a side elevational view of a wheel-tractor scraper having a guard means of this invention mounted on each draft arm thereof;
FIG. 2 is a cross-sectional view through a draft arm and attached guard means, taken in the direction of arrows II-II in FIG. I;
FIG. 3 is a top plan view of the draft arm and attached guard means of FIG. 2; and
FIG. 4 is a view similar to FIG. 2, but showing a modifled embodiment of the guard means.
DETAILED DESCRIPTION OF THE INVENTION FIG. 1 illustrates a wheel-tractor scraper 10 comprising a tractor portion 11 attached to a scraper portion 12 by a conventional gooseneck 13 and a pair of laterally-spaced draft arms 14. The scraper portion comprises a scraper bowl 15 adapted to be selectively raised or lowered by a pair of conventional lift cylinders 16 (one shown). When the scraper bowl is lowered to a scraping position, raised to a hauling position or transported to a dump site, relative vertical motion occurs between the scraper bowl and draft arms 14.
Normally, such relative motion is of small concern. However, should a large rock R (FIG. 2) or the like become wedged between a draft arm 14 and a sidewall of the scraper bowl, undue wearing of the draft arm and scraper bowl will occur. In addition, components employed in the hydraulic circuit utilized to effect such raising and lowering may become adversely affected.
The above problem may be overcome by attaching a guard means or rock guard 17 on each draft arm so that it extends substantially the entire length thereof (FIG. 1). In the FIGS. 1-3 embodiment, the guard means comprises a flat plate 18 releasably attached to an unon the upper surface of draft arm .14. The plate is at vtached thereon by releasable fastening means, such as cap screws 20, each extending through an elongated slot means 21 to selectively adjust the distance d, between an inner edge 22 of the plate and a sidewall 23 ofscraper bowl 15. v
Thus, edges 22 may be prepositioned in substantial parallel relationship with respect to sidewall 23 at a first predetermined distance d which is substantially less (preferably at least one-half) than a second predetermined distance D, between the inner side of draft arm 14 and sidewall 23. Thus, as the bowl is being loaded with material to a heaped condition, the spill-off will fall onto guard means 17. The smaller sized materials will fall through the opening formed between edge 22 and sidewall 23, whereas larger rocks and the like will be prevented from falling therethrough. Otherwise stated, the wedging condition indicated by rock R in FIG. 2 is prevented since distance d is substantially smaller than distance D.
FIG. 4 illustrates a modified guard means 17a wherein block 19 (FIG. 2) has been eliminated. Like numerals depict corresponding structures with the numerals appearing in FIG. 4 being accompanied by a small a.
The modified guard means comprises a plate 18a which is releasably attached directly on a draft arm 14a by means of cap screws 20a. Each cap screw extends through an elongated slot 21a to precisely set the distance d between inner edge 22a of plate 18a and a sidewall 23 of the scraper bowl. Such distance is substantially less than distance D, between the inner side of draft arm 14a and sidewall 23.
What is claimed is:
1. In a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl, the invention comprising guard means attached on each of said draft arms to extend substantially the entire length thereof and each further extending between an upper surface of a respective draft arm and a respective side of said scraper bowl, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the scraper bowl.
2. The combination of claim 1 wherrein each of said guard means comprises a flat plate attached on the upper surface of a respective draft arm by a plurality of releasable fastening means.
3. The combination of claim 2 wherein each of said fastening means projects through an elongated slot means formed through said plate for permitting adjustment of said first predetermined distance.
4. The combination of claim 1 wherein said first predetermined distance is less than one-half of said second predetermined distance.
5. The combination of claim 1 wherein each of said guard means is attached on a block, secured on an upper surface of a respective draft arm.
6. The combination of claim 1 wherein each of said guard means is attached directly on the upper surface of a respective draft arm.
7. In a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl, the invention comprising guard means attached on each of said draft arms to extend substantially the entire length thereof, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the

Claims (7)

1. In a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl, the invention comprising guard means attached on each of said draft arms to extend substantially the entire length thereof and each further extending between an upper surface of a respective draft arm and a respective side of said scraper bowl, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the scraper bowl.
2. The combination of claim 1 wherrein each of said guard means comprises a flat plate attached on the upper surface of a respective draft arm by a plurality of releasable fastening means.
3. The combination of claim 2 wherein each of said fastening means projects through an elongated slot means formed through said plate for permitting adjustment of said first predetermined distance.
4. The combination of claim 1 wherein said first predetermined distance is less than one-half of said second predetermined distance.
5. The combination of claim 1 wherein each of said guard means is attached on a block, secured on an upper surface of a respective draft arm.
6. The combination of claim 1 wherein each of said guard means is attached directly on the upper surface of a respective draft arm.
7. In a tractor scraper combination having a scraper bowl pivotally attached to a tractor by a pair of laterally-spaced draft arms each positioned adjacent to a respective side of said scraper bowl, the invention comprising guard means attached on each of said draft arms to extEnd substantially the entire length thereof, and having inner edges thereof spaced a first predetermined distance from a respective side of said scraper bowl which is substantially less than a second predetermined distance between each draft arm and the side of the scraper bowl, each of said guard means comprising a flat plate attached on a respective draft arm by a plurality of releasable fastening means and each of said fastening means projecting through an elongated slot means formed through said plate for permitting adjustment of said first predetermined distance.
US438286A 1974-01-31 1974-01-31 Rock guard for scraper draft arm Expired - Lifetime US3890726A (en)

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US438286A US3890726A (en) 1974-01-31 1974-01-31 Rock guard for scraper draft arm
GB2444/75A GB1486724A (en) 1974-01-31 1975-01-20 Wheeled tractor-bowl scraper combinations

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084335A (en) * 1977-04-19 1978-04-18 Caterpillar Tractor Co. Bowl and ejector apparatus
US4294026A (en) * 1980-05-15 1981-10-13 Sanner Contracting Co. Elevating earth scraper
WO2010030888A2 (en) * 2008-09-12 2010-03-18 Caterpillar Inc. Lift arm and machine equipped with the lift arm

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574713A (en) * 1946-08-14 1951-11-13 Sell Jesse Clamshell excavator of the carry type
US2718074A (en) * 1953-05-04 1955-09-20 Bartlett Armor Scoop attachment for tractors
US2721404A (en) * 1949-08-04 1955-10-25 Int Steel Co Latch mechanism for soil scoop
US2747308A (en) * 1949-12-27 1956-05-29 Western Equipment Mfg Co Bowl and apron adjustment for double frame carry type scoop
US2974977A (en) * 1959-03-27 1961-03-14 Robert C Herron Adjustable mounting for tractor fenders
US2981428A (en) * 1953-09-16 1961-04-25 Kenna E Noffsinger Tractive vehicle mounted bucket
US3308565A (en) * 1964-11-18 1967-03-14 Deere & Co Protective shield on earth-carrying scraper
US3352037A (en) * 1965-06-10 1967-11-14 Clark Equipment Co Power operated apron for tractor scrapers
US3634955A (en) * 1969-09-19 1972-01-18 Caterpillar Tractor Co Safety lock for scraper apron
US3768572A (en) * 1972-01-21 1973-10-30 Hesston Corp Structure for eliminating mud collections in farm implements

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2574713A (en) * 1946-08-14 1951-11-13 Sell Jesse Clamshell excavator of the carry type
US2721404A (en) * 1949-08-04 1955-10-25 Int Steel Co Latch mechanism for soil scoop
US2747308A (en) * 1949-12-27 1956-05-29 Western Equipment Mfg Co Bowl and apron adjustment for double frame carry type scoop
US2718074A (en) * 1953-05-04 1955-09-20 Bartlett Armor Scoop attachment for tractors
US2981428A (en) * 1953-09-16 1961-04-25 Kenna E Noffsinger Tractive vehicle mounted bucket
US2974977A (en) * 1959-03-27 1961-03-14 Robert C Herron Adjustable mounting for tractor fenders
US3308565A (en) * 1964-11-18 1967-03-14 Deere & Co Protective shield on earth-carrying scraper
US3352037A (en) * 1965-06-10 1967-11-14 Clark Equipment Co Power operated apron for tractor scrapers
US3634955A (en) * 1969-09-19 1972-01-18 Caterpillar Tractor Co Safety lock for scraper apron
US3768572A (en) * 1972-01-21 1973-10-30 Hesston Corp Structure for eliminating mud collections in farm implements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084335A (en) * 1977-04-19 1978-04-18 Caterpillar Tractor Co. Bowl and ejector apparatus
US4294026A (en) * 1980-05-15 1981-10-13 Sanner Contracting Co. Elevating earth scraper
WO2010030888A2 (en) * 2008-09-12 2010-03-18 Caterpillar Inc. Lift arm and machine equipped with the lift arm
WO2010030888A3 (en) * 2008-09-12 2010-06-17 Caterpillar Inc. Lift arm and machine equipped with the lift arm

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Publication number Publication date
GB1486724A (en) 1977-09-21

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Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515