US2684092A - Bark-removing drum having welded hoop construction - Google Patents

Bark-removing drum having welded hoop construction Download PDF

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Publication number
US2684092A
US2684092A US68290A US6829048A US2684092A US 2684092 A US2684092 A US 2684092A US 68290 A US68290 A US 68290A US 6829048 A US6829048 A US 6829048A US 2684092 A US2684092 A US 2684092A
Authority
US
United States
Prior art keywords
drum
staves
hoops
fingers
bark
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
US68290A
Other languages
English (en)
Inventor
George M Dick
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.)
Ingersoll Rand Co
Original Assignee
Ingersoll Rand 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
Priority to BE543712D priority Critical patent/BE543712A/xx
Application filed by Ingersoll Rand Co filed Critical Ingersoll Rand Co
Priority to US68290A priority patent/US2684092A/en
Priority to GB15555/49A priority patent/GB658152A/en
Priority to CH279702D priority patent/CH279702A/fr
Application granted granted Critical
Publication of US2684092A publication Critical patent/US2684092A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • B27L1/02—Debarking or removing vestiges of branches from trees or logs; Machines therefor by rubbing the trunks against each other; Equipment for wet practice
    • B27L1/025—Debarking in rotating drums

Definitions

  • This invention relates to log barking devices and more particularly to the drums of log barking devices.
  • drums for devices of the type to which this invention appertains were generally fabricated by riveting.
  • this mode of assembly has several known disadvantages, such as the time delay incurred in drilling the'rivet holes and the weakening of the members in which such holes are formed. It is, accordingly, one object of this invention to provide a log barking drum of welded construction.
  • Another object of this invention is to assemble the various members of the drum in such a manner that the transfer of stresses therebetween is a gradual rather than abrupt process.
  • Figure 1 is a side view of a log barking drum constructed in accordance with the practice of the invention
  • Fig. 2 is a longitudinal elevation, in section, of the drum
  • Fig. 3 is a transverse view taken through Figure 2 along the line 3--3 looking in the direction of the arrows, and
  • Fig. 4 is an enlarged detail of the drum.
  • FIG. 1 it indicates a cylindrically shaped log barking drum mounted on flanged rollers ll, positioned on the opposite sides and at the opposite end portions of the drum i0, and in which ride annular tracks or tires l2 encircling the drum In and mounted thereon.
  • Rotation of the drum It] is facilitated by means of a girth gear It encircling and secured to the drum l and engaging a drive pinion l4 mounted on the drive shaft [5 supported by the members l6 and rotated by a motor (not shown).
  • staves, l8 are mounted on the inner periphery of the drum l0 thereby presenting an irregular surface to the log H for increasing or accentuating relative movement between the logs ll.
  • the staves l8 have a generally U-shaped cross sectional form and the marginal or free end portions l9 are turned outwardly to provide surfaces in face relation with and to seat against the inner periphery of the collar, or hoops, 28 to which they are secured.
  • the hoops 20 are positioned at predetermined spaced intervals with respect to each other along the length of the staves l8-the space between the hoops 20 being determined by the strength of the staves l8. It is on these hoops that the girth gear l3 and the tires l2 are mounted.
  • the ends of the staves [8 are secured to end covers 2! having central openings 22 through which the logs H are loaded in the drum in and dumped therefrom.
  • the diameter of the opening 22 is somewhat less than the inner diameter of the drum I 8 thereby providing a rim or internal flange l2! at the opposite ends of the drum ill to retard the movement of the logs I! through the drum I0.
  • the staves l3 are welded to the hoops 20 and the end covers 2! and in order to prevent the abrupt transfer of load or stress therefrom to the staves IS, the marginal portions, indicated in general by I20, of the hoops 2i and the inner marginal portions, indicated in general by I22, 0f the end covers 2
  • the distance between outer edges of a pair of fingers, measured at the roots, or base, of the fingers, is substantially equal to the width of a stave is.
  • the staves it are then mounted with the center lines of the marginal portions l9 along the center lines of the fingers 23, as best seen in Figure 4, and the edges of the marginal portion is are welded along the inner surface of the hoops 20 and the end covers 2
  • the edges of the marginal portions 19 may also be welded to the inner peripheral surfaces of the hoops 2% (see Fig. 4:).
  • the transfer of stresses from the hoops 20 to the staves I8 is a gradual process-that is to say, due to the taper and flexibility of the fingers 23, the load stresses in the hoops 29 are gradually assumed by the staves l8 thereby obviating the danger of failure in the staves at this point due to the abrupt transfer of stresses between the hoop Z9 and the staves l8.
  • the distance or space between pairs of fingers by pair it is meant any two fingers on which a stave I8 is mounted-is suilicient to allow the passage of bark stripped from the logs ii to pass between the staves Is and free of the drum I0.
  • a drum comprising, a plurality of hoops spaced relative to each other, fingers integral with the hoops and extending laterally outward from the opposite edges thereof, and staves of generally U-shaped cross sectional form extending laterally between said hoops, the marginal portions of said staves being turned outwardly to provide surfaces in face relation with the inner surface of said fingers and welded thereto.
  • a log barking drum comprising, a plurality of hoops spaced relative to each other, the marginal portions of said hoops being of the form of fingers extending laterally of the hoop, said fingers being tapered laterally outward, and staves of generally U-shaped cross-sectional form longitudinally disposed on the periphery of said hoops and extending therebetween, the marginal portions of said staves being turned to provide surfaces in face relation to surfaces on said fingers and the edges and said surfaces of the fingers being welded to the marginal portions of the staves.
  • a log barking drum comprising, a plurality of hoops spaced relative to each other and having laterally extended finger shaped marginal portions, the fingers of said marginal portions being tapered laterally outward, and staves of generally U-shaped cross-sectional form longitudinally disposed on the inner periphery of said hoops and extending therebetween, the marginal portions of said staves being turned outwardly to provide surfaces in face relation to the inner surfaces on said fingers, said fingers being welded to said marginal portions.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
US68290A 1948-12-30 1948-12-30 Bark-removing drum having welded hoop construction Expired - Lifetime US2684092A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE543712D BE543712A (US20020095090A1-20020718-M00002.png) 1948-12-30
US68290A US2684092A (en) 1948-12-30 1948-12-30 Bark-removing drum having welded hoop construction
GB15555/49A GB658152A (en) 1948-12-30 1949-06-10 Improvements in log barking devices
CH279702D CH279702A (fr) 1948-12-30 1949-07-26 Tambour pour le décorticage des billes de bois.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US279702XA 1948-12-30 1948-12-30
US658152XA 1948-12-30 1948-12-30
US68290A US2684092A (en) 1948-12-30 1948-12-30 Bark-removing drum having welded hoop construction

Publications (1)

Publication Number Publication Date
US2684092A true US2684092A (en) 1954-07-20

Family

ID=27363139

Family Applications (1)

Application Number Title Priority Date Filing Date
US68290A Expired - Lifetime US2684092A (en) 1948-12-30 1948-12-30 Bark-removing drum having welded hoop construction

Country Status (3)

Country Link
US (1) US2684092A (US20020095090A1-20020718-M00002.png)
BE (1) BE543712A (US20020095090A1-20020718-M00002.png)
CH (1) CH279702A (US20020095090A1-20020718-M00002.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979090A (en) * 1958-11-17 1961-04-11 Ingersoll Rand Canada Log debarking drum
US3262477A (en) * 1963-12-26 1966-07-26 Manitowoc Shipbuilding Inc Debarking apparatus
US3417796A (en) * 1966-02-15 1968-12-24 Manitowoc Shipbuilding Inc Debarking apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1311226A (en) * 1919-07-29 Barking-drum
US2208004A (en) * 1938-06-18 1940-07-16 Manitowoc Shipbuilding Company Barking drum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1311226A (en) * 1919-07-29 Barking-drum
US2208004A (en) * 1938-06-18 1940-07-16 Manitowoc Shipbuilding Company Barking drum

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979090A (en) * 1958-11-17 1961-04-11 Ingersoll Rand Canada Log debarking drum
US3262477A (en) * 1963-12-26 1966-07-26 Manitowoc Shipbuilding Inc Debarking apparatus
US3417796A (en) * 1966-02-15 1968-12-24 Manitowoc Shipbuilding Inc Debarking apparatus

Also Published As

Publication number Publication date
CH279702A (fr) 1951-12-15
BE543712A (US20020095090A1-20020718-M00002.png)

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