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Topic: Delimbing

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	Self-aligning cutter head assembly for delimbing trees - United States Patent 4,749,012
		It is generally known to delimb trees by encircling the tree trunk with curved blade members and either moving the curved blade members along the length of the tree, or pulling the tree in a longitudinal direction through the curved blade members.
		The delimbing device of this patent is supported in a fixed position on a trailer and includes a pair of semi-circular lower cutting blade jaws with a single semi-circular upper cutting jaw pivotally mounted between the lower jaws.
		The delimbed tree may then be positioned on the length cutter, not shown, and then the cut length is loaded on the truck, or the whole delimbed tree can be directly loaded on a truck positioned adjacent the knuckle boom loader 12.
	xrint.com /patents/us/4749012 (3714 words)

	Tree delimbing apparatus - Patent 4919175
		The delimbing apparatus of claim 4 wherein said lower ends of said support arms are pivotally connected to said vehicle at points adjacent to the central longitudinal axis of said vehicle.
		To operate the delimber, the boom is extended and the delimbing head grasps the tree, using grapple jaws.
		In operation, the delimber head is lowered to contact with the butt of the log 48 which is to be delimbed, and grappling arms 17 are tightened around the log.
	www.freepatentsonline.com /4919175.html (2196 words)

	Logging - Wikipedia, the free encyclopedia
		The tree is turned into logs by removing the limbs (delimbing) and cutting it into logs of optimal length (bucking).
		Trees are felled, delimbed, bucked, and sorted (pulpwood, sawlog, etc.) at the stump area leaving limbs and tops in the forest.
		Harvesters fell the tree, delimb and buck it, and place the resulting logs in bunks to be brought to the landing by the forwarder.
	en.wikipedia.org /wiki/Logging (990 words)

	Harvester (forestry) - Wikipedia, the free encyclopedia
		Harvester, type of heavy vehicle employed in cut-to-length logging operations for felling, delimbing and bucking trees.
		The wheels pivot apart to allow the tree to be embraced by the harvester head, and pivot together to hug the tree tight.
		The wheels are driven in rotation to force the cut tree stem through the delimbing knives.
	en.wikipedia.org /wiki/Harvester_(forestry) (614 words)

	Tree delimbing device with self-aligning cutter head - Patent 4899794
		A tree delimbing device according to claim 1 wherein said pivot means supported on said opposite sides of said rectangular support frame includes support pins positioned in substantial alignment with the longitudinal axis of the tree trunk being moved through the respective cutting and guiding means.
		A tree delimbing device according to claim 3 wherein said support pins are positioned slightly rearwardly of the center of gravity so that the forward end of said rectangular support frame is tilted downwardly by a slight amount when said cutter head assembly is not in use.
		A tree delimbing device according to claim 4 wherein said pivot means connecting said horizontal medial portion of said yoke member to said base plate is positioned forwardly of said support pins on opposite sides of said rectangular support frame.
	www.freepatentsonline.com /4899794.html (2343 words)

	[No title]
		Delimbing and topping can occur in the stump area or at a point before roadside.
		A typical cut-to-length logging system could employ a one-grip harvester which fells, delimbs and bucks the trees right in the stump area, and a forwarder to carry the pulpwood and logs to roadside.
		Similarly, when using a one-grip harvester to produce tree-lengths or delimbing in the cut-over with a processor to produce tree-lengths, the advantages associated with both the full tree systems (e.g., high productivity and concentrating processing at roadside) and cut-to-length systems (e.g., extended off-road transport distances, cleaner wood, minimal roadside landings) are lost.
	flash.lakeheadu.ca /~repulkki/ctl_ft.html (3023 words)

	Timber West Journal Sept Oct 2002
		With four delimbing knives, two of them fixed, and a maximum delimbing diameter of 32”, the Magnum has a.404” chain with a speed of 42 m/sec and a 30” bar.
		With four delimbing knives, two of them fixed, the Coronas are maneuverable inside tight first-thinning forests, but are powerful enough to handle some clearcut operations, the company says.
		Fixed delimbing knives are attached to the tilt frame and movable knives, made from heat-treated steel, are hydraulically controlled to adjust to the tree's contour.
	www.forestnet.com /timberwest/archives/Sept_Oct_02/tech_watch.htm (3289 words)

	Protecting the Forest Environment (Logging for the 21st Century Series)
		Machines equipped with both the stroke-type delimber and stationary delimbing knives may be appropriate for mixed hardwood and conifer forests.
		Delimbing knives may be modified for debarking by increasing the pressure on the knives and using feed rollers with more aggressive teeth.
		The felling or processor head is hydraulically operated and typically consists of a chain saw that fells and bucks the log, rollers that advance the log through the head, and knives and/or stroke delimbers that remove limbs.
	www.extension.umn.edu /distribution/naturalresources/DD6518.html (4849 words)

	PRODUCTION AND COSTS OF THE CHAMBERS DELIMBINATOR IN FIRST THINNING OF PINE PLANTATIONS. \| Business (Site not responding. Last check: 2007-10-11)
		Delimbing quality standards are typically higher for sawlogs and veneer grade logs than for pulpwood.
		Delimbing accounted for 30 percent of the cost of putting radiata pine on board trucks in New Zealand [2] while delimbing and bucking together accounted for 24 percent of on-board costs in Montana [3].
		Pull-through delimbing machines used in conjunction with log loaders are also now a common delimbing method in the South [4].
	www.allbusiness.com /periodicals/article/709915-1.html (649 words)

	[No title]
		Trees were never completely delimbed during the manual operation, because of the problems with accessing the bottom side of the tree.
		Mechanical delimbing occurred at the landing after skidding operations and no manual delimbing was required when this operation was included in the system.
		The manual delimbing was also considered a very dangerous and fatiguing operation, particularly given the average limb size and number of limbs that had to be removed.
	juniper.oregonstate.edu /mcneel.htm (3091 words)

	Timber West Journal Sept 2001
		With four delimbing knives (two of them fixed) and a maximum delimbing diameter of 32", the Magnum has a 0.404" chain with a speed of 42 m/sec and a 30" bar.
		The Euca has two delimbing knives (one fixed) and a 25" bar, while the Husky has four delimbing knives (two fixed) and a maximum delimbing diameter of 20".
		Fixed delimbing knives are attached to the tilt frame, while movable knives, made from heat-treated steel, are hydraulically controlled for adjusting to the tree's contour.
	www.forestnet.com /timberwest/archives/Sept_01/harvesting_heads.htm (2650 words)

	Industrial Reporting, Inc. Article - Limb Injures Chain Saw Operator While Delimbing
		OSHA requires all logging employees to undergo thorough training on recognition and avoidance of hazards for any logging task to which they are assigned prior to beginning work.
		Trees should be closely inspected prior to delimbing, and workers should position themselves such that no limb or branch, or movement of the trunk, will cause injury.
		To release the tension in spring poles, with a chain saw carefully shave off fiber from the underside of the spring pole at the point of greatest tension, such that the limb weakens and the tension releases slowly.
	www.timberlinemag.com /articledatabase/view.asp?articleID=1862 (342 words)

	H752 Harvester Head
		The John Deere H752 - with its new robust design, 6 delimbing knives (4 moving, 2 fixed), powerful feed motors and 57cm felling diameter - is ideal for regeneration harvesting.
		The H752 is a new generation harvester head featuring the highly efficient Supercut 100 saw unit, accurate 3-colour marking system (as an option) with reduced dye consumption and redesigned delimbing knives.
		The new shape of the delimbing knives covers a large area of the stem, ensuring excellent delimbing quality.
	www.deere.com /en_GB/forestry/forestry_equipment/attachments/h752.html (190 words)

	Blount - Forestry and Industrial Equipment Division - Prentice, Hydro-Ax, CTR, and Fabtek
		With the standard 30' boom, the lift capacity is more than adequate to provide the power needed to lift trees and place them in a delimber.
		And with a swing torque exceeding 35,000 ft-lbs., the 280 has the muscle for pull-through delimbing.
		With the addition of the 280 to the Prentice loader line, loggers have a wide range of choices, with the 210E for loading and light-delimbing, the new 280 for heavy-duty delimbing with conventional high-performance hydraulics, to the 310E and 410E/EX for heavy-duty delimbing with power on demand hydraulic systems.
	www.blount-fied.com /news5.htm (327 words)

	Delimbers (Site not responding. Last check: 2007-10-11)
		Pioneer Machinery offers a wide variety of delimbing solutions including Stroke Delimbers from Timberline, Chain Flail Delimbers from Peterson Pacific, Pull-through Delimbers from CTR and CSI and Gate Delimbers from Riley Manufacturing.
		The patented boom design of the Timberline delimber produces more delimbing power than competitive delimbers and the robust I-beam boom is designed to live through the daily rigors of hardwood delimbing.
		With a proven track record, this third generation design outperforms the competition by accepting a wider variety of wood sizes and shapes, requires less fuel per hour, requires less working space, operates with lower chain costs, and increases fiber yields by as much as 25% per acre.
	www.pioneermachinery.com /delimber.htm (633 words)

	Silvatec A/S - Harvesting heads
		Silvatec 235 MD40 – Delimbing diameter 50 – 350 mm, felling diameter max.
		Silvatec 560 - Delimbing diameter 50 – 600 mm, felling diameter max.
		The rollers are a little inclined which gives an extremely good grip on the logs.
	www.silvatec.com /Aggregater.1551.aspx (233 words)

	Logging and Transportation Safety - Timber Harvesting Safety Manual
		The delimbing units have reduced woods workers exposures to chainsaws and ground hazards involved in the delimbing processes.
		Routinely clear accumulated slash and debris from the delimbing area using a skidder or bulldozer.
		Do not attempt to remove jams in the delimber without ensuring all power is removed from the delimber (Zero Energy State).
	www.loggingsafety.com /thsm-5d.htm (232 words)

	Hillister Tractor Sales, Inc. - New Tigercat Forestry Equipment (Site not responding. Last check: 2007-10-11)
		The 220 log loader is suited to loading and light duty delimbing.
		The Tigercat T240B is a versatile track loader with sufficient tractive effort and flotation for difficult loading and sorting as well as light duty shovel logging applications.
		The new D860 delimber carrier performs on the deck or at the stump.
	www.hillistertractor.com /html/newtigercat.html (533 words)

	Nova International Ltd. - Agriculture & Forestry Equipment - Aylesford & Windsor, Nova Scotia (Site not responding. Last check: 2007-10-11)
		The Patu Stroke Delimber mechanizes delimbing and cross-cutting - the two heaviest stages of logging.
		Thanks to three moving and one fixed delimbing knife the delimbing quality is unbeatable.
		The cross-cut saw is on the end of the delimbering frame and cross-cuts the timber away from the tractor wheels.
	www.novainternationalltd.com /delimber.html (144 words)

	HighBeam Research (Site not responding. Last check: 2007-10-11)
		Delimbing hybrid poplar prior to processing with a flail/chipper.
		Using a pull-through delimber, we delimbed trees prior to flailing and chipping, with the objective of speeding up the latter processes.
		The reduced cost of flail/chipping did not cover the additional cost of delimbing with the machine mix tested, but changes to equipment and operating conditions might improve the...
	www.highbeam.com /library/doc0.asp?DOCID=1G1:85250754&refid=holomed_1 (170 words)

	Dymax Stationary D-Limber 1000 - TreeShears.com (Site not responding. Last check: 2007-10-11)
		The Dymax Stationary D-Limber is ruggedly built to withstand the loads and stresses of everyday delimbing.
		Equipped with dual tapered knives the Dymax Stationary D-Limber has less tendency to pull off knots or branches and increases the market value for processed trees.
		From hardwood to softwood the Dymax D-Limber can provide years of productive delimbing.
	www.treeshears.com /delimber (164 words)

	Industrial Reporting, Inc. Article - Product Profiles - December 2005
		The clean, ribbed structure is designed to stand up to daily delimbing.
		There are no weld joints in high load areas and the rigid, skeletal design disperses the stress generated during delimbing from the knives down and out through the cradle mounting.
		Lead screws in the base control a sliding wedge that raises and lowers the roller.
	www.timberlinemag.com /articledatabase/view.asp?articleID=1822 (1132 words)

	IFI IPC Class Hierarchies
		Transplanting, uprooting, felling or delimbing trees A01G 23/04.
		Transplanting, uprooting, felling or delimbing trees A01G 23/06.
		Transplanting, uprooting, felling or delimbing trees A01G 23/08.
	www.ificlaims.com /IFICLS/ich/ag01.htm (2080 words)

	Patu SH Series Harvester Heads
		The strong double jaws of the Patu 400 SH guarantee a firm yet gentle grip on the stem.
		The 4.1 tnne delimbing power of the head is enough for the heaviest of limbs.
		The saw is well protected inside the shield.
	www.logloader.com /heads/patu_sh.html (194 words)

	AFM harvester and processor heads
		AFM 58 Husky head is the best option for softwood clear-cutting or thinning in which delimbing quality is highly important.
		Its high feeding power, combined with its tree-feeding rollers system and two pairs of delimbing knives, provides high output in all conditions.
		High-pressure hydraulics can use the maximum power from base machine to the operation.
	www.afm-forest.fi /en/products/afm58/afm58husky.htm (170 words)

	delimbing, (: ) @ Forestry Images
		Spanish Fork Ranger District, Uinta National Forest, Timber Mountain Timber Sale, July 2000, mechanical delimber
		Uinta National Forest, Trapper Hollow Timber Sale, July 2000, mechanical delimber
		Forestry Images is a joint project of The Bugwood Network and USDA Forest Service.
	www.forestryimages.org /browse/subimages.cfm?sub=11651 (114 words)

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