US3926410A - Log skidding cone - Google Patents

Log skidding cone Download PDF

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Publication number
US3926410A
US3926410A US551297A US55129775A US3926410A US 3926410 A US3926410 A US 3926410A US 551297 A US551297 A US 551297A US 55129775 A US55129775 A US 55129775A US 3926410 A US3926410 A US 3926410A
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United States
Prior art keywords
guard
log
end guard
convergent
extension
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Expired - Lifetime
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US551297A
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English (en)
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Donald A Mcleod
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G23/00—Forestry
    • A01G23/003—Collecting felled trees

Definitions

  • An end guard for use in skidding logs.
  • This end guard comprises a cylindrical body open at one end to receive a log to be skidded, with the other end of said body converging axially and outwardly from the body to define an aperture.
  • This aperture is of a size sufficient to allow a flexible member such as a chain or cable to pass therethrough for engaging the log to be skidded.
  • the open end of the cylindrical body includes a semi-cylindrical extension which projects longitudinally therefrom.
  • At least one stop member is provided interiorly of the cylindrical body of the end guard, to limit the distance a log can be drawn inwardly into the convergent end of the guard. It is also preferrable herein to provide the convergent end of the guard with deflecting means which operate to inhibit the end guard from abutting against an obstacle such as a tree trunk or stump.
  • the semicylindrical extension of the end guard includes a pair of spaced apart reinforcing rib members which are operable for both reinforcing that extension and also providing guidance to a log being drawn into the end guard.
  • This invention relates to a guard or cone for use in skidding logs.
  • the present invention is expected to minimize and possibly eliminate many of the problems associated previously with the skidding of logs. It is one feature of this invention, for instance, to provide a guard or cone which reduces the tendency of the leading end of the log from catching or abutting on rock, roots, fallen trees or the like. Moreover, the build up of snow or mud which previously preceeded the forward end of the log during skidding, is greatly reduced.
  • an end guard or cone for use in skidding logs comprising a cylindral body open at one end to receive a log to be skidded, with the other end of said body being axially convergent to define an aperture of a size sufficient to allow a flexible member to pass therethrough and engage the log, said open end of the body including a semicylindrical extension projecting longitudinally therefrom.
  • the present end guard or skidding cone is provided with a pair of spaced apart reinforcing rib members which are formed on the cylindrical body and semi-cylindrical extension thereof. These rib members provide reinforcement to that extension and guidance to a log being drawn into the end guard.
  • the convergent end of the cylindrical body is formed with deflecting means which inhibit the end guard from abutting against an obstacle such as a rock, tree trunk or the like.
  • FIG. 1 is a side elevation view of an end guard according to this invention, for use in skidding logs;
  • FIG. 2 is a top plan view of the end guard of FIG. 1;
  • FIG. 3 is a fragmentary sectional view of the end guard of FIG. 1;
  • FIG. 4 is a perspective view of the end guard of FIG.
  • FIGS. 5 and 6 are views similar to FIGS. 1 and 2 of an alternative embodiment of the end guard of this invention.
  • FIG. 7 is a perspective view showing the guard described herein being positioned for use on a log
  • FIG. 8 is a perspective view taken from the side of the end guard of FIG. 1, in use,;
  • FIG. 9 is a perspective view of a further use of the end guard of FIG. 1.
  • an end guard or skidding cone according to the invention is indicated generally at 10, in FIG. 1.
  • the end guard 10 includes a cylindrical body of suitable material such as metal or reinforced plastic.
  • the body 12 defines an open end 13 and opposite thereto, an axially convergent closed end 14 which tapers radially inwardly to define an aperture 15.
  • the convergent closed end of the metal body 12 as shown in FIG. 1 is frusto-conical in form. Other similar configurations could also be used.
  • the frusto-conical portion 14 is secured, for instance, by welding to the body 12 and is provided with the aperture 15. This aperture preferrably is provided with a fairlead 20 secured therein as by welding. See FIG. 3 in particular.
  • a choker chain or cable 22 passes through the fairlead 20 and is adapted to engage an end portion of a log 23 circumferentially, as shown in FIGS. 7 and 8.
  • a pair of apertures 21 are provided in the convergent end portion 14, and are positioned so that a cable or hook (not shown) can be passed through such apertures or otherwise secured temporarily through the conical portion 14, making it possible to pull the end guard 10 off the log which normally would weight down that end guard.
  • a pair of bars or stops 25 there is provided interiorly of the frusto-conical portion 14 a pair of bars or stops 25. These stops 25 prevent the log 23 from being drawn too far forwardly into the frustoconical portion 14 and avoids jamming of the logs therein.
  • FIGS. 1 and 2 Another feature of the end guard 10 can also be seen in FIGS. 1 and 2. There, a portion of the trailing edge:
  • the leading end of the end guard 10 preferrably is provided with deflecting bars 30 which are spaced apart sufficiently to allow the chain or cable 22 to pass therethrough. These deflecting bars 30 are conveniently welded, or otherwise rigidly fixed to the leading end of the frustoconical portion 14.
  • deflecting bars 30 inhibits the otherwise flattened fairlead or leading end of the frustoconical portion 14 from abutting against small trees, roots, rocks or other such obstacles which tend to hin der the progress of a log being skidded along the ground.
  • FIG. 4 illustrates the end guard or skidding cone 10, and a further feature of that end guard.
  • the shovel point 28 on the loading lip 27 has been replaced by a somewhat scalloped trailing edge. This is shown at 32.
  • the semicylindrical lip 27 includes a pair of reinforcing ribs or bars 34 which preferrably are welded or otherwise fixedly secured to the body 12 of the end guard 10. These bars 34 are conveniently in the form of inverted V-shaped channels or the like. The purpose of these reinforcing bars is to strengthen the loading lip 27 when a log is being drawn into the end guard 10, as well as providing guidance for that log.
  • these reinforcing bars or ribs 34 are disposed longitudinally. being parallel to the stops 25 as seen in both FIGS. 4 and 7.
  • FIGS. 5 and 6 show a slight variation of the end guard 10 of FIGS. 1 4, with the end portion 14 now having a curvilinear rounded closed end.
  • the end guard 10 from a reinforced thermoplastic material, with the body 12 and end portions 14 being moulded together as an integral unit.
  • the loading lip 27 can have different profiles in addition to those edges shown at 28 and 32.
  • the end guard or skidding cone 10 is placed adjacent to the log 23.
  • a choker chain or cable 22 is then threaded through the fairlead and open leading end, and secured circumferentially about the log 23 through the use of a slip hook 36 See FIG. 7.
  • the choker chain or cable 22 is normally adapted to be engaged by a grab hook 38 carried by a chain or cable 40. This chain or cable 40 is normally pulled by a tractor, a draft horse, or the like.
  • the loading lip 27 is normally disposed on the ground. It is then possible to bring the log and skidding cone or guard 10 together, so that the leading end of the log will slide onto the loading lip 27, and be guided by the reinforcing bars 34 into the body of the guard 10. This latter step occurs when skidding of the log commences, the choker chain or cable 22 thus applying a force which draws the log into the guard 10 until the forward end of the log engages the bar stops 25. Skidding then continues in the normal manner. When the log 23 has been skidded to its destination, the end guard 10 is removed by applying a pulling force to only the end guard 10, as by a hook which engages the apertures 21 shown in FIGS. 1 and 2.
  • Another, and more convenient method of removing the cone from the end of the log is placing a skid (section of a tree) at right angles to the direction of travel, and pulling the cone over and slightly beyond it, raising the forward end of the log off the ground, allowing the cone to hang loosely, making the removal of the cone a simple operation.
  • skidding cone or end guard 10 will travel with the long and heavier side at the bottom, sliding over the ground.
  • slip hook 36 will generally be disposed on the upper side of the log when travelling, due to the upwardly extending chain or cable, at least in those instances when skidding is done with a draft animal.
  • FIG. 8 shows an embedded log about to be pulled by a chain or cable 22 which extends coaxially of that log.
  • the chain 22 is secured to the log so that the slip hook 36 is placed generally on top.
  • the end guard 10 is then positioned against the end of the log 23 at an angle, and with the longitudinally extending loading lip 27 placed downwardly.
  • the shovel point 28 (or alternatively the scalloped edge 32) is forced under the lower edge of the log as far as possible.
  • a pulling force can be applied to the log 23.
  • the chain 22 is pulled straight, and is the shortest distance within the skidding cone 10.
  • An end guard for use in skidding a log, the guard comprising a cylindrical body open at one end to receive a log to be skidded, the other end of said body being axially convergent to define an aperture of a size sufficient to allow a flexible member to pass therethrough for engaging said log, the open end of said body including a semi-cylindrical extension projecting longitudinally therefrom.
  • reinforcing rib members are provided on said semi-cylindrical extension disposed parallel to the axis of said cylindrical body, with deflecting bars being provided on the convergent end of said body to deflect the end guard from becoming lodged against an obstacle such as a tree trunk, said bars being disposed parallel to the reinforcing rib members.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Catching Or Destruction (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
US551297A 1974-03-07 1975-02-19 Log skidding cone Expired - Lifetime US3926410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA194,296A CA980833A (en) 1974-03-07 1974-03-07 Log skidding cone

Publications (1)

Publication Number Publication Date
US3926410A true US3926410A (en) 1975-12-16

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ID=4099397

Family Applications (1)

Application Number Title Priority Date Filing Date
US551297A Expired - Lifetime US3926410A (en) 1974-03-07 1975-02-19 Log skidding cone

Country Status (7)

Country Link
US (1) US3926410A (enrdf_load_html_response)
AT (1) AT332798B (enrdf_load_html_response)
CA (1) CA980833A (enrdf_load_html_response)
DE (1) DE2508341A1 (enrdf_load_html_response)
FI (1) FI750650A7 (enrdf_load_html_response)
NO (1) NO750729L (enrdf_load_html_response)
SE (1) SE7502330L (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645082A (en) * 1983-01-19 1987-02-24 Elkem A/S Means for suspending a skid pan from a winch mounted on a tractor
US20080011143A1 (en) * 2006-07-10 2008-01-17 Jason Varcoe Log hauler
US20160002007A1 (en) * 2014-02-18 2016-01-07 Yale Cordage Inc. Wood chipper hook

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719094A (en) * 1897-10-09 1903-01-27 Lidgerwood Mfg Co Log-capper.
US1344320A (en) * 1919-08-20 1920-06-22 Thomas Steve Grapple-hook for skidding logs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US719094A (en) * 1897-10-09 1903-01-27 Lidgerwood Mfg Co Log-capper.
US1344320A (en) * 1919-08-20 1920-06-22 Thomas Steve Grapple-hook for skidding logs

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645082A (en) * 1983-01-19 1987-02-24 Elkem A/S Means for suspending a skid pan from a winch mounted on a tractor
US20080011143A1 (en) * 2006-07-10 2008-01-17 Jason Varcoe Log hauler
US7472916B2 (en) * 2006-07-10 2009-01-06 Jason Varcoe Log hauler
US20160002007A1 (en) * 2014-02-18 2016-01-07 Yale Cordage Inc. Wood chipper hook

Also Published As

Publication number Publication date
NO750729L (enrdf_load_html_response) 1975-09-09
DE2508341A1 (de) 1975-09-11
SE7502330L (enrdf_load_html_response) 1975-09-08
CA980833A (en) 1975-12-30
FI750650A7 (enrdf_load_html_response) 1975-09-08
ATA167175A (de) 1976-01-15
AT332798B (de) 1976-10-11

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