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A backhoe [lower-alpha 1] is a type of excavating equipment, or excavator, consisting of a digging bucket on the end of a two-part articulated arm. It is typically mounted on the back of a tractor or front loader, the latter forming a "backhoe loader" (a US term, but known as a "JCB" in Ireland and the UK). [1] The section of the arm closest to the vehicle is known as the boom, while the section that carries the bucket is known as the dipper (or dipper-stick), both terms derived from steam shovels. The boom, which is the long piece of the backhoe arm attached to the tractor through a pivot called the king-post, is located closest to the cab. It allows the arm to pivot left and right, typically through a range of 180 to 200 degrees, and also enables lifting and lowering movements.
The term "backhoe" refers to the action of the bucket, not its location on the vehicle. [2] That is, a backhoe digs by drawing earth backwards, rather than lifting it with a forward motion like a person shovelling, a steam shovel, or a bulldozer. The buckets on some backhoes may be reconfigured facing forward, making them "hoes".
A tractor-loader backhoe (TLB) is a tractor-like vehicle with a backhoe at the rear, a front loader on the other and a swivelling seat to position the operator facing whichever direction is needed at the time. In North America, this arrangement is often referred to as simply a backhoe, or when on a chassis originally derived from farm tractors, a tractor-loader backhoe. To differentiate, a backhoe on its own dedicated chassis may then be referred to as an excavator.
Backhoe loaders can be designed and manufactured from the start as such, or can be the result of a farm tractor equipped with a front end loader (FEL) and rear backhoe. Though similar looking, the purpose-designed backhoe loaders are much stronger, with the farm variation unsuitable for heavy work.
With the advent of hydraulic powered attachments such as a tiltrotator, breaker, a grapple or an auger, the backhoe is frequently used in many applications other than excavation and with the tiltrotator attachment serves as an effective tool carrier. Many backhoes feature quick coupler (quick-attach) mounting systems for simplified attachment mounting, dramatically increasing the machine's utilization on the job site. Backhoes are usually employed together with loaders and bulldozers. Excavators that use a backhoe are sometimes called "trackhoes" by people who do not realize the name is due to the action of the bucket, not its location on a backhoe loader.
Backhoe loaders are general-purpose tools, and are being displaced to some extent by multiple specialist tools like the excavator and the speciality front-end loader, especially with the rise of the mini-excavator. On many job sites which would have previously seen a backhoe used, a skid-steer loader and a mini excavator will be used in conjunction to fill the backhoe's role. However, backhoes are still in general use. The difference between the backhoe and the skid-steer loader, are that the backhoe has attachments back and front, where as the skid-steer loader only has front attachments, however, the attachment versatility on a skid-steer loader is much greater.
Sometimes a backhoe bucket is reversed to work in a power shovel configuration. [3]
Sometimes a backhoe arm is used as a crane, by slinging the lifted object from the support linkages behind the scoop (advisably not from the teeth, preferably from a hook welded on a bucket, quick coupler or tiltrotator). [4]
The backhoe swing frame was invented in 1947 by Vaino (pronounced "Waino") J. Holopainen and Roy E. Handy Jr. The swing frame "allowed the hydraulic digging arm to swing to the side to dump the bucket under US patent # 2,698,697". [5] [6] In April 1948 Wain-Roy Corporation sold the first hydraulic backhoe, mounted to a Ford Model 8N tractor, to the Connecticut Light and Power Company for $705. [5]
The first tractor-loader backhoe was a Wain-Roy backhoe mounted to a Frank G. Hough model "HE" in 1952 in Holden, Massachusetts, US, for the Holden Water Department. The F.G. Hough Company was a subsidiary of the International Harvester Company. By early 1954, two Hough "Payloader" model wheel loaders, the HE and the HF, were available with Wain-Roy backhoes. In 1954 the Wain-Roy Corporation negotiated a deal with IH for the Hough TLB full-scale production on several other models of Hough loaders. [7]
In the same year, JCB launched the first European hydraulic loader, followed by a backhoe with a 180° slew, fitted to a tractor, in 1953. In 1957, Case developed the first integrated tractor backhoe loader at the Case New Holland plant in Burlington, Vermont, helping contractors complete their work more efficiently. [8]
JCB introduced the first dedicated backhoe loader, incorporating the excavator and the major loader in a single, all-purpose tool. [9]
In 1960, Vaino Holopainen was introduced as "Mr. Backhoe" to Henry Ford II. [7] Wain-Roy continued to produce them for Ford until 1963, when Ford started making their own. Wain-Roy Corporation later bought the AC Anderson Company. [7] Although the Wain-Roy Corporation no longer exists, the Wain-Roy product line of backhoe attachments and couplers is still available through the Woods Equipment Company of Rockford, Illinois, US. [10] In 1965, Kelly G. Cunningham used the 7.6 Gravely Tractor to create the Terramite Model 1 compact backhoe, known as the T1. [11]
Because of the long-time predominance of the JCB marque in the United Kingdom and Ireland, it has become a genericized trademark there, and backhoe-equipped diggers are commonly called JCBs, while the term "backhoe" as an excavator component is almost unknown to the general public in this context. The founder of the JCB company, Joseph Cyril Bamford, is the only Briton to be honored in the Association of Equipment Manufacturers Hall of Fame. [9]
"Backhoe fade" or "JCB fade" is a term coined by the telecommunications field to refer to accidental damage or complete severing of a communications cable by a backhoe or similar construction activity. [12] [13]
The term is a play on other types of signal loss, especially on wireless networks. Most of these cause a reduction in the signal, such as rain fade. A cable subjected to "backhoe fade" is instead a sudden and initially inexplicable loss of signal experienced when a cable is accidentally dug up and damaged or cut.
A tractor is an engineering vehicle specifically designed to deliver a high tractive effort at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most commonly, the term is used to describe a farm vehicle that provides the power and traction to mechanize agricultural tasks, especially tillage, and now many more. Agricultural implements may be towed behind or mounted on the tractor, and the tractor may also provide a source of power if the implement is mechanised.
A skid loader, skid-steer loader (SSL), or skidsteer is any of a class of compact heavy equipment with lift arms that can attach to a wide variety of buckets and other labor-saving tools or attachments.
A shovel is a tool used for digging, lifting, and moving bulk materials, such as soil, coal, gravel, snow, sand, or ore. Most shovels are hand tools consisting of a broad blade fixed to a medium-length handle. Shovel blades are usually made of sheet steel or hard plastics and are very strong. Shovel handles are usually made of wood or glass-reinforced plastic (fiberglass).
Excavators are heavy construction equipment primarily consisting of a boom, dipper, bucket and cab on a rotating platform known as the "house" - although the largest form ever, the dragline excavator, eliminated the dipper in favor of a line and winch.
A loader is a heavy equipment machine used in construction to move or load materials such as soil, rock, sand, demolition debris, etc. into or onto another type of machinery.
A backhoe loader, also called a loader backhoe, loader excavator, tractor excavator, digger or colloquially shortened to backhoe within the industry, is a heavy equipment vehicle that consists of a tractor-like unit fitted with a loader-style shovel/bucket on the front and a backhoe on the back. Due to its (relatively) small size and versatility, backhoe loaders are very common in urban engineering and small construction projects as well as developing countries. This type of machine is similar to and derived from what is now known as a TLB (Tractor-Loader-Backhoe), which is to say, an agricultural tractor fitted with a front loader and rear backhoe attachment.
Heavy equipment, heavy machinery, earthmovers, construction vehicles, or construction equipment, refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. Heavy equipment usually comprises five equipment systems: the implement, traction, structure, power train, and control/information.
Volvo Construction Equipment - Volvo CE - is a major international company which develops, manufactures, and markets equipment for construction and related industries. It is a subsidiary and business of the Volvo Group.
J.C. Bamford Excavators Limited (JCB) is a British multinational manufacturer of equipment for construction, agriculture, waste handling, and demolition. It was founded in 1945 and is based in Rocester, Staffordshire, England.
Case Construction Equipment is an Italian manufacturer of construction machinery. Along with CASE IH, Case Construction Equipment is a brand of CNH. Case produces construction equipment including excavators, motor graders, wheel loaders, vibratory compaction rollers, crawler dozers, skid steers, and compact track loaders.
A compact or mini excavator is a tracked or wheeled vehicle with an approximate operating weight from 0.7 to 8.5 tonnes. It generally includes a standard backfill blade and features independent boom swing.
Muir Hill (Engineers) Ltd was a general engineering company based at Old Trafford, Manchester, England. It was established in the early 1920s and specialised in products to expand the use of the Fordson tractor, which in the pre-war days included sprung road wheels, bucket loaders, simple rail locomotives, and in particular in the 1930s they developed the dumper truck. Later they built high horse power tractors.
A heavy equipment operator operates heavy equipment used in engineering and construction projects. Typically only skilled workers may operate heavy equipment, and there is specialized training for learning to use heavy equipment.
A tiltrotator is a hydraulic attachment/tool used on most excavators, and backhoes between 1,5 and 40 tons in the Nordic countries. A tiltrotator is mounted on the excavator such that the excavator bucket can be rotated through 360 degrees and one tilts +/- 45 degrees, in order to increase the flexibility and precision of the excavator. The Tiltrotator was introduced to the market in Sweden in the early 1980s by the Norgrens under the family owned and operated company named Noreco, and has become the standard in Scandinavia. The concept has recently gained popularity in other countries such as the Netherlands, Germany, UK, Japan, Canada and United States.
A bucket is a specialized container attached to a machine, as compared to a bucket adapted for manual use by a human being. It is a bulk material handling component.
Steelfab was a Cardiff, Wales-based engineering firm that built the "Steelfab Digger", a competitor to the HyMac and JCB excavators in the 1960s. The company also built the Horndraulic brand of front loaders for fitting to agricultural tractors.
Traxcavator was a namebrand of the Trackson Company of Milwaukee, Wisconsin. The word "Traxcavator" came from combining "tractor" and "excavator".
Quick couplers are used with construction machines to allow the rapid change of working tools or buckets and attachments on the machine. They remove the need to use hammers to manually drive out and insert the mounting pins for attachments. They also bring with them additional safety risks that must be overcome by careful design and manufacture, and proper use.
Link-Belt Cranes is an American industrial company that develops and manufactures heavy construction equipment, specializing in telescopic and lattice boom cranes. Link-Belt is headquartered in Lexington, Kentucky, and is a subsidiary of the Japanese conglomerate, Sumitomo Heavy Industries.
CNH Industrial N.V. is an American-Italian multinational corporation with global headquarters in Basildon, United Kingdom, but controlled and mostly owned by the multinational investment company Exor, which in turn is controlled by the Agnelli family. The company is listed on the New York Stock Exchange. The company is incorporated in the Netherlands. The seat of the company is in Amsterdam, Netherlands, with a principal office in London, England.
Original source: Webster's New World Telecom Dictionary, 2010 by Wiley Publishing, Inc.