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Encyclopedia > Bulldozer
A Liebherr bulldozer with ripper at the back
A Liebherr bulldozer with ripper at the back


A bulldozer is a crawler (caterpillar tracked tractor), equipped with a substantial metal plate (known as a blade), used to push large quantities of soil, sand, rubble, etc, during construction work. The term "bulldozer" is often used to mean any heavy engineering vehicle, but precisely, the term refers only to a tractor (usually tracked) fitted with a dozer blade. That is the meaning used herein. Look up bulldozer in Wiktionary, the free dictionary. ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution‎ (3,264 × 2,448 pixels, file size: 1. ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution‎ (3,264 × 2,448 pixels, file size: 1. ... A tractor crawler is a vehicle with tracks instead of wheels. ... </nowiki> Rear sprocket of a Leclerc tank Track of a Leclerc tank U.S. M60 Patton tank. ... For other uses, see Bulldozer (disambiguation). ... An excavator. ...

Contents

History

Caterpillar D9 Bulldozer older version in the museum Sinsheim, Germany
Caterpillar D9 Bulldozer older version in the museum Sinsheim, Germany

The first bulldozers were adapted from farm Holt tractors that were used to plough fields. Their versatility in soft ground for logging and road building, lead directly to them becoming the armoured tank in the first war. Download high resolution version (2560x1920, 2290 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (2560x1920, 2290 KB) Wikipedia does not have an article with this exact name. ... The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. ... Benjamin_Holt. ... The traditional way: a German farmer works the land with a horse and plough. ...


In 1923, a young farmer named James Cummings and a draftsman named J. Earl McLeod made the first designs for a bulldozer. A replica is on display at the city park in Morrowville, Kansas where the two built the first bulldozer.[1] Morrowville is a city located in Washington County, Kansas. ...


By the 1920s, tracked vehicles became common, particularly the Caterpillar 60. To dig canals, raise earth dams, and do other earthmoving jobs, these tractors were equipped with a large thick metal plate in front. This thick metal plate (it got its curved shape later) is called a "blade". The blade peels layers of soil and pushes it forward as the tractor advances. Several specialized blades have been developed: for high volume loads such as coal, rakes to remove only larger boulders, or blades with razor sharp edges to cut tree stumps. In some early models the driver sat on top in the open without a cabin. These attachments, home built or by small equipment manufacturers of attachments for wheeled and crawler tractors and trucks, appeared by 1929, widespread acceptance of the bull-grader does not seem to appear before the mid-1930s, and the addition of powered down force made them the preferred excavation machine for large and small contractors alike by the 1940s, by which time the term "bulldozer" referred to the entire machine and not just the attachment. This article or section does not cite its references or sources. ... For other uses, see Canal (disambiguation). ... This article is about structures for water impoundment. ... A blade is the flat part of a tool or weapon that normally has a cutting edge and/or pointed end typically made of a metal, most recently, steel intentionally used to cut, stab, slice, throw, thrust, or strike an animate or inainimate object. ... Loess field in Germany Surface-water-gley developed in glacial till, Northern Ireland For the American hard rock band, see SOiL. For the System of a Down song, see Soil (song). ... Coal Example chemical structure of coal Coal (pronounced ) is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. ... This article is about the large rocks. ... The coniferous Coast Redwood, the tallest tree species on earth. ...


Over the years, bulldozers got bigger and more powerful in response to the demand for equipment suited for ever larger earthworks. Firms like Catepillar, Komatsu, Fiat-Allis, John Deere, International Harvester, Case, Liebherr, Terex and JCB started to manufacture large tracked-type earthmoving machines. In civil engineering, earthworks are engineering works created through the moving of massive quantities of soil or unformed stone. ... Caterpillar Inc. ... Komatsu Limited ) or Komatsu Hanomag excavator in Germany Komatsu construction vehicle in New Orleans, Louisiana (USA) Komatsu (コマツ) (TYO: 6301) is a Japanese company that manufactures construction, mining, and military equipment, industry machinery such as press machines, lasers, and thermoelectric modules. ... Fiat-Allis is a firm which makes engineering vehicles. ... Deere & Company (usually known by its brand name John Deere) (NYSE: DE) is an American corporation based in Moline, Illinois, and the leading manufacturer of agricultural machinery in the world. ... For the song by Craig Morgan, see International Harvester (song). ... Case CE, also Case Construction Equipment or simply Case, is a brand of construction equipment from CNH Global. ... The Liebherr Group is a German manufacturer established in 1949 by Hans Liebherr. ... Terex Corporation (NYSE: TEX) is a diversified global manufacturer of a broad range of heavy equipment for a variety of industries, including construction, infrastructure, quarrying, recycling, surface mining, shipping, transportation, refining, utility and maintenance. ... JCB is a family business named after its founder J.C.Bamford, producing distinctive yellow-and-black engineering vehicles, diggers (Backhoes) and excavators. ...


Bulldozers grew more sophisticated as well. Important improvements include more powerful engines, more reliable drive trains, better tracks, raised cabins, and hydraulic (instead of early models' cable operated) arms that enable more precise manipulation of the blade and automated controls. As an option, bulldozers can be equipped with a rear ripper claw to loosen rocky soils or to break up pavement (roads). A more recent innovation is the outfitting of bulldozers with GPS technology, such as manufactured by Trimble Inc. for precise grade control and (potentially) "stakeless" construction. Table of Hydraulics and Hydrostatics, from the 1728 Cyclopaedia. ... This article is about the American English usage of pavement as the durable surfacing of roads and walkways. ... Over fifty GPS satellites such as this NAVSTAR have been launched since 1978. ... Trimble NASDAQ:TRMB is a provider of advanced positioning solutions, including GPS receivers. ...


The best known maker of bulldozers is probably the Caterpillar Tractor Company, which earned its reputation for making tough durable reliable machines. Although these machines began as modified farm tractors, they became the mainstay for big civil construction projects, and found their way into use by military construction units throughout the world. Their best known model, the Caterpillar D9, was also used to clear mines and demolish enemy structures. Caterpillar Inc. ... The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. ... This article is about mineral extractions. ... For other uses, see Demolition (disambiguation). ...


History of the word

  • Around 1880: In the USA, a "bull-dose" was a large and efficient dose of any sort of medicine or punishment. 'Bull-dosing' meant a severe whipping or coercion, or other intimidation such as at gunpoint.
  • 1800s: term used in engineering for a horizontal forging press[1].
  • 1886: "bulldozer" meant a large-caliber pistol and the person who wielded it.
  • Late 1800s: "bulldozing" meant using big force to push over or through any obstacle.
  • Later: applied to the vehicle.

These appeared as early as 1929, but were known as "bull grader" blades, the term "bulldozer blade" does not appear to come into widespread use until the mid 1930s and now refers to the whole machine not just the attachment. In contemporary usage, "bulldozer" is usually shortened to simply "dozer". For other uses, see Whip (disambiguation). ... Intimidation is generally used in the meaning of criminal threatening. ... Gunpoint, is a word that literally means at the point of a gun, and used to indicate that a person is under the threat of being shot with a firearm. ... A Browning 9 millimeter Hi-Power Ordnance pistol of the French Navy, 19th century, using a Percussion cap mechanism Derringers were small and easily hidden. ...


Description

Most often, bulldozers are large and powerful tracked engineering vehicles. The tracks give them excellent ground hold and mobility through very rough terrain. Wide tracks help distribute the bulldozer's weight over large area (decreasing pressure), thus preventing it from sinking in sandy or muddy ground. Extra wide tracks are known as 'swamp tracks'. Bulldozers have excellent ground hold and a torque divider designed to convert the engine's power into dragging ability , letting the bulldozer use its own weight to push very heavy things and remove obstacles that are stuck in the ground. The Caterpillar D9, for example, can easily tow tanks that weigh more than 70 tons. Because of these attributes, bulldozers are used to clear areas of obstacles, shrubbery, burnt vehicles, and remains of structures. An excavator. ... This article is about pressure in the physical sciences. ... For other uses, see Sand (disambiguation). ... This article is about a type of online computer game. ... For other senses of this word, see torque (disambiguation). ... For other uses, see Weight (disambiguation). ... The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. ...


Sometimes a bulldozer is used to push another piece of earthmoving equipment known as a "scraper". The towed Fresno Scraper, invented in 1883 by James Porteous, was the first design to enable this to be done economically, removing the soil from the cut and depositing it elsewhere on shallow ground (fill). Many dozer blades have a reinforced center section with this purpose in mind, and are called "bull blades." In archeology, scrapers are unifacial tools that were used either for hideworking or woodworking purposes. ... The Fresno Scraper was invented in 1883 by the Scottish immigrant and entrepreneur James Porteous who, having worked with farmers in Fresno, California, had recognised the dependence of the Fresno Valley on irrigation and the requirement for a more efficient means of constructing canals and ditches in the sandy soil. ... Year 1883 (MDCCCLXXXIII) was a common year starting on Monday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Saturday of the 12-day slower Julian calendar). ... James Porteous (1848-1922) was the inventor of the Fresno Scraper. ... Fill may refer to: In civil engineering, a fill is an artificial ridge or dam of earth or gravel (fill dirt) constructed to support a prepared right-of-way such as a railroad or highway across a valley or depression. ...


The bulldozer's primary tools are the blade and the ripper. A blade is the flat part of a tool or weapon that normally has a cutting edge and/or pointed end typically made of a metal, most recently, steel intentionally used to cut, stab, slice, throw, thrust, or strike an animate or inainimate object. ...


Ripper

Multi-shank ripper
Multi-shank ripper

The ripper is the long claw-like device on the back of the bulldozer. Rippers can come singly (single shank) or in groups or two or more (multi shank rippers). Usually, a single shank is preferred for heavy ripping. The ripper shank is fitted with a replaceable tungsten steel alloy tip. Image File history File links Size of this preview: 640 × 600 pixelsFull resolution‎ (2,612 × 2,448 pixels, file size: 1. ... Image File history File links Size of this preview: 640 × 600 pixelsFull resolution‎ (2,612 × 2,448 pixels, file size: 1. ... For other uses, see Tungsten (disambiguation). ... For other uses, see Steel (disambiguation). ... An alloy is a homogeneous hybrid of two or more elements, at least one of which is a metal, and where the resulting material has metallic properties. ...


Ripping rock lets the ground surface rock be broken into small rubble easy to handle and transport, which can then be removed so grading can take place. Agricultural ripping lets rocky or very hard earth be broken up so otherwise unploughable land can be farmed. For example, much of the very best land in the California wine country consists of old lava flows: with heavy bulldozers such as the Caterpillar D9 and the Caterpillar D11 the lava is shattered allowing practical agriculture for the wine industry. Also, hard earth can be ripped and decompacted to allow planting of orchards where otherwise trees could not grow on the land. This article is about the U.S. state. ... Look up lava, Aa, pahoehoe in Wiktionary, the free dictionary. ... The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. ... The Caterpillar D-11 series of tracked-type tractors are among the largest conventional bulldozers in the world, second to Komatsu D575. ...


Blade

Degelman Blade Degelman Industries Ltd.
Degelman Blade Degelman Industries Ltd.

The bulldozer blade is a piece of heavy metal plate, installed on the front of the tractor, with the aim of pushing things, handling rough obstacles and shoving sand, soil and debris. The dozer blade on front of the tractor usually comes in 3 varieties: Image File history File links Metadata Size of this preview: 800 × 532 pixelsFull resolution‎ (1,200 × 798 pixels, file size: 889 KB, MIME type: image/jpeg) (All user names refer to en. ... Image File history File links Metadata Size of this preview: 800 × 532 pixelsFull resolution‎ (1,200 × 798 pixels, file size: 889 KB, MIME type: image/jpeg) (All user names refer to en. ... A blade is the flat part of a tool or weapon that normally has a cutting edge and/or pointed end typically made of a metal, most recently, steel intentionally used to cut, stab, slice, throw, thrust, or strike an animate or inainimate object. ... For other uses, see Sand (disambiguation). ... Debris (French, pronounced (IPA) dibri) is a word used to describe the remains of something that has been otherwise destroyed. ...

  1. A Straight Blade ("S-Blade") which is short and has no lateral curve, no side wings, and can be used for fine grading.
  2. A Universal Blade ("U-Blade") which is tall and very curved, and has large side wings to carry more material.
  3. A "S-U" combination blade which is shorter, has less curvature, and smaller side wings.This blade is typically used for pushing piles of large rocks, such as at a quarry.

In military use, dozer blades are fixed on combat engineering vehicles and can optionally be fitted on other vehicles, such as artillery tractors like the Type 73 or M8 Tractor. Combat applications for dozer blades include clearing battlefield obstacles and preparing fire positions.[2] The EBG combat engineering vehicle, based on the AMX 30 tank, is used by the engineers of the French Army for a variety of missions. ... Komsomolets tractor Artillery tractor is a kind of tractor, also referred to as a gun tractor, a vehicle used to tow artillery pieces of varying weights. ... The Type 73 is an artillery tractor of the Japan Ground Self-Defense Force. ... The M8 High-Speed Tractor was an artillery tractor used by the US Army from 1950. ...


Modifications

Bulldozers have been further modified over time to evolve into new machines which are capable of working in ways that the original bulldozer can not. One example is that loader tractors were created by removing the blade and substituting a large volume bucket and hydraulic arms which can raise and lower the bucket, thus making it useful for scooping up earth and loading it into trucks. Other modifications to the original bulldozer include making it smaller to let it operate in small work areas where movement is limited, such as in mining. A very small bulldozer is sometimes called a calfdozer: see the image at this link and this link. A Volvo L120E front loader. ... For other uses, see Truck (disambiguation). ... This article is about mineral extractions. ...


Nevertheless, the original earthmoving bulldozers are still irreplaceable as their tasks are concentrated in deforestation, earthmoving, ground leveling, and road carving. The heavy bulldozers are mainly employed to level the terrain to make it fit to construct on. The construction, however, is mainly done by small bulldozers and loader tractors. This article is about the process of deforestation in the environment. ... A Volvo L120E front loader. ...


Education

The National Association of Heavy Equipment Training Schools (NAHETS), established 2002, uses bulldozer training schools and circuilum as a method to test and train users in the ability of bulldozer use. The National Association of Heavy Equipment Training Schools (commonly known as NAHETS) is a private educational organization that primarily trains within the heavy equipment construction industry in the United States. ...


Uses

Bulldozers can be found on large and small scale construction sites, mines, roadsides, military bases, heavy industry factories, and large governmental projects. For other uses, see Construction (disambiguation). ... This article is about mineral extractions. ...


Armored bulldozers

An armored Caterpillar D9 Bulldozer used by Israel's armed forces.
An armored Caterpillar D9 Bulldozer used by Israel's armed forces.

Some bulldozers, especially bulldozers in military usage, have been fitted with armor in order to protect the driver from enemy fire, thus enabling the bulldozer to operate in battle zones. The best-known armored bulldozer is probably the IDF Caterpillar D9, used by the Israeli Defense Forces (IDF) for detonating explosive charges and demolishing structures under fire. Caterpillar does not make nor install the armor—that is entirely the work of the IDF. However, various users, including the US military, buy armor kits from the IDF and fit them onto their own D9s. The design varies, but the armor kit on average adds 10 tonnes to the weight of the bulldozer, which weighs about 49 tonnes without the armor. Image File history File linksMetadata Caterpillar1133. ... Image File history File linksMetadata Caterpillar1133. ... Armor or armour (see spelling differences) is protective clothing intended to defend its wearer from intentional harm in combat and military engagements, typically associated with soldiers. ... An armored Caterpillar D9 bulldozer used by the IDF. Armored bulldozers are a standard tool of combat engineering battalions, and the Israeli Defence Forces has gained notoriety for their use of armored bulldozers for urban warfare in the Al-Aqsa Intifada. ... The Caterpillar D9 is a large track-type tractor (commonly referred to as a bulldozer) with caterpillar tracks designed and manufactured by Caterpillar Inc. ... The Israel Defense Forces (IDF) (Hebrew: &#1510;&#1489;&#1488; &#1492;&#1492;&#1490;&#1504;&#1492; &#1500;&#1497;&#1513;&#1512;&#1488;&#1500; Tsva Ha-Haganah Le-Yisrael ([Army] Force [for] the Defense of Israel), often abbreviated &#1510;&#1492;&#1500; Tsahal, alternative English spelling Tzahal, is the name of Israels armed forces... This article is about the metric tonne. ...


Some bulldozers have been fitted with armor by non-government civilian operators to prevent bystanders or police from interfering with the work performed by the bulldozer, as in the case of strikes or demolition of condemned buildings. See Marvin Heemeyer. Condemned is a 1929 melodrama film. ... It has been suggested that Killdozer (bulldozer) be merged into this article or section. ...


See also

The Falkirk Wheel in Scotland. ... An excavator. ... Hydrema mine clearing vehicle MineWolf tiller-based demining machine deployed in Sudan Digger Mini Flail for Mine Clearance Demining is the process of removing landmines or naval mines from an area. ... “Minefield” redirects here. ... The National Association of Heavy Equipment Training Schools (commonly known as NAHETS) is a private educational organization that primarily trains within the heavy equipment construction industry in the United States. ... A ‘’’mining simulator’’’ is a system used to replicate elements of mining operations, for training or efficiency analysis. ...

Derivative word uses

  • The bulldozer shrimp is a tropical sea shrimp so named because it spends much of its time pushing sand out of the hole in which it stays.
  • Tracked Loaders (also known as Crawler Loaders) are sometimes incorrectly referred to as bulldozers because of the similarity in design.

References

  1. ^ Encyclopædia Britannica, 1910, Vol. 27, p. 39.
  2. ^ Trewhitt, Philip (1999). Armoured Fighting Vehicles. Dempsey-Parr. ISBN 1-84084-328-4. 

The Encyclopædia Britannica is a general English-language encyclopaedia published by Encyclopædia Britannica, Inc. ...

External links

Wikimedia Commons has media related to:

http://www.mcaninchcorp.com/ENR_04_10_2006_v6.pdf Image File history File links Commons-logo. ...


  Results from FactBites:
 
Bulldozer - Wikipedia, the free encyclopedia (1377 words)
Bulldozers have excellent ground hold and a torque divider designed to convert the engine's power into dragging ability, letting the bulldozer use its own weight to push very heavy things and remove obstacles that are stuck in the ground.
The bulldozer blade is a piece of heavy metal plate, installed on the front of the tractor, with the aim of pushing things, handle rough obstacles and shoving sand, dirt and debris.
Bulldozers can be found on large and small scale construction sites, mines, roadsides, military bases, heavy industry factories, and large governmental projects.
Caterpillar D9 - Wikipedia, the free encyclopedia (952 words)
The D9 is mostly used as a bulldozer, and though it comes in many configurations, it is mostly common in its basic dozer configuration: equipped with a detachable large blade and a rear ripper attachment.
Like many other bulldozers, the D9 can be fitted with different blades (such as size-9 SU blade and Universal blade) or other devices such as mineplows or combine harvester.
This was seen as a move to distance itself from the Israeli army's use of the Caterpillar bulldozers to destroy Palestinian homes and uproot thousands of olive trees during controversial security operations.
  More results at FactBites »

 
 

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