US2570845A - Rotary chipper-knife mounting - Google Patents

Rotary chipper-knife mounting Download PDF

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Publication number
US2570845A
US2570845A US657924A US65792446A US2570845A US 2570845 A US2570845 A US 2570845A US 657924 A US657924 A US 657924A US 65792446 A US65792446 A US 65792446A US 2570845 A US2570845 A US 2570845A
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Prior art keywords
knife
retainer
bar
holder
clamping
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Expired - Lifetime
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US657924A
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Peter N Ottersland
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Individual
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Individual
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Priority to US657924A priority Critical patent/US2570845A/en
Application filed by Individual filed Critical Individual
Priority claimed from DEO1714A external-priority patent/DE881751C/en
Priority to DEO1714A priority patent/DE881751C/en
Priority to FR1048362D priority patent/FR1048362A/en
Priority to GB17689/51A priority patent/GB698771A/en
Priority claimed from GB17689/51A external-priority patent/GB698771A/en
Publication of US2570845A publication Critical patent/US2570845A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Priority to SE9767/69A priority patent/SE323872B/xx
Priority claimed from SE7600014A external-priority patent/SE407891B/en
Priority to US05/862,320 priority patent/US4155384A/en
Expired - Lifetime legal-status Critical Current

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    • 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
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor

Definitions

  • This invention relates to chipper knives and knife mountings.
  • Chipper knives are subjected to heavy and severe usage and when used in chipping logs wear rapidly. In order to withstand the severe strains sustained when they engage the logs and cut chips therefrom, they must be made of high grade steel and must be very firmly and rigidly supported.
  • This invention has for its salient object to provide an improved knife and knife mounting or support so constructed andarranged that the maximum width of the knife can be utilized and the knife will be firmly and rigidly held in all positions of adjustment.
  • Another object of the invention is to provide a knife and knife mounting so relatively constructed and arranged that the knife can be preadjusted in the knife holder -'or retainer to the proper position prior to clamping the knife and holder in position on the chipper disk.
  • FIG. 1- is a fragmentary elevational view of a portion of a chipper disk illustrating a knife and knife mounting constructed in accordance with the invention
  • Fig. .2 is a sectional elevation taken substantially on line 2-2 of Fig. 1, looking in the direction of the arrows;
  • Fig. 3 is a sectional elevation, on'an enlarged scale, taken at right angles to Fig. 2 and illustrating a knife, knife retainer, and clamp secured in operative position on a chipper disk;
  • Fig. 4 is a view similar to Fig. 3 but illustrating the method or means for adjusting and backing the knife to secure the full use thereof and, furthermore, illustrating a slightly modified means for holding the rear or inner end of the knife retainer in position;
  • Fig. 5 is an elevational view of the knife retainer bar
  • Figs. 6 and 7 are transverse sectional elevations taken substantially on lines 6-.-6 and 'l-'
  • Fig. 8 is an elevational view of the backing bar used to form a backing support for the knife as it becomes worn and is ground off;
  • Fig. 9 is an edge view or end elevation of the 7 bar shown in Fig. 8;
  • Fig. 10 is an elevational view similar to Fig. 8 but showing another form of backing bar.
  • -V-shaped recess being illustrated as slabbed off Fig. 11 is an end elevation of the bar shown in Fig. 10.
  • the invention briefly described consists of a knife mounting for chipper knives.
  • the chipper disk is recessed to receive a holder for the knife assembly and the knife is adjustably mounted in a retainer bar which is clamped in the holder by clamping means engaging the outer edge portion of the retainer bar and also the inner edge portion thereof.
  • the retainer bar forms an abutment for the knife and in turn abuts against a surface of the holder which is mounted in the :recess or pocket in the chipper disk.
  • the knife is adjustably mounted in the retainer bar and as the cutting edge Wears away and is regrourid :the knife can be adjusted outwardly on the bar to dispose the cutting edge in the correct position relative to the retainer bar.
  • backing means is secured to the "retainer bar to fill in the space between the rear will be seen that the cutting edge of each knife is disposed tangent to a circle drawn about the axis of the-chipper disk as a center.
  • are slotted or provided with openings 23 which receive the chips cut from the logs by the knives.
  • the disk 20 has also formed therein a substantially V-shaped recess 25, the inner end of the or fiat as shown at 26.
  • Thewear plate is also recessed, as shown at 27, this recess communi- -cating with the recess 25 of the disk 20 and also with the portion of the slot or opening 23 formed in the wear plate.
  • Each knife mounting comprises a holder 28 which is substantially V-shapedin section, as shown in Figs. 3 and 4, having angularly disposed portions 29 and 30.
  • the portion 30 has an extension 3
  • the knife blade or knife 35 is adjustably mounted in a knife retainer bar 36 which is pro-
  • the retainer bar 36 also has spaced, inclined notches 39 which are cured to the retainer bar by means of bolts 45 which extend through the slots 31.
  • the V-shaped holder 28 is secured in the recess by means of bolts 46.
  • the retainer bar is inserted in the holder 28 with the back edge 41 of the bar disposed against the s'ur- I face 48 of the portion 30 of the holder 28.
  • the retainer bar and knife are then clamped in position by means of a clamping bar 59 to which are secured the bolts 46 which extend through the othersurface of the chipper disk and are tightened by means of nuts 51 and locked in tightened position by set screws52.
  • the clamping bar has an under surface 53 which engages a shoulder 54 on the portion 30 of the holder 28 and the other edge of the clamping bar 58 engages the outer edge portion 55 of the retainer bar 36.
  • an S-shaped spring 56 is secured by a bolt 51 to the portion 30 of the holder, and when the clamping bar 50 is drawn to clamping position the outer end 58 of the spring 55 will be engaged by the under surface of the clamping bar 50', thus forcing the portion 59 of the spring against the inner edge portion of the retainer bar 36 in the manner shown in Fig. 3.
  • the backing bar is provided with dowel pins 56 which extend into dowel pin openings 61 formed in the abutment surface 45 of the retainer bar 36.
  • the outer edge of the backing bar 65 is engaged by the inner edge of a second backing bar 68 and the space between the outer edge of this backing bar and the rear edge of the knife is filled in by shims 69.
  • the backing bar 68 is secured in position by bolts Ill which extend through the slots 31. In this manner the necessary backing for the knife is provided at all times regardless of the width of the knife.
  • clamping bar 50 will firmly, securely and rigidly hold the knife and knife retainer bar in position with the under surface of the knife disposed against the outer surface ll of the portion 29 of the holder 28.
  • a rotatable knife carrier having a pocket for receiving a knife and knife mounting, said knife mounting having a knife supporting surface adapted for engagement by the. back surface of the knife and an abutment surface, a knife retainer bar having a rear edge adapted to engage said abutment surface, and
  • a rotatable knife carrier having a pocket, a knife assembly in said pocket and comprising a member having surfaces disposed substantially at right angles to each other,
  • a knife retainer bar having a rear edge adapted to engage said other pocket surface and having a shoulder adapted to form a thrust abutment of the knife, means including clamping means engageable with the outer edge portion of the retainer bar and one end of said member for clamping the assembly in the pocket.
  • a rotatable knife carrier havinga' pocket .;for receiving a knife and knife retainer bar-and-separate and additional means for clamping said retainer bar and knife in said pocket, said'clamping means including means engaging both edges of said retainer bar.
  • a knife carrier having a 'V-shapedsupport for a knife, a knife retainer, a
  • a V-shaped knife holder a substantially flat knife retainer, means for adjustably mounting a knife on said retainer, and means engageable with the holder and with ,the longitudinaledge portions of the retainer for securing the knife and retainer in said. holder.
  • a rotatable chipper disk In combination, a rotatable chipper disk, a V-shaped knife holder, means for securing the holder to said disk, a substantially fiat knife retainer, meansfor adjustably mounting a knife holder and with the longitudinal edge portions 5 of the retainer for securing the knife and retainer Number in said holder. 375,059 PETER N. OTTERSLAND. 384,491 812,078 REFERENCES CITED 5 335 15
  • the following references are of record in the 1,683,913 file of this patent: UNITED STATES PATENTS 2,337,407 Number Name Date 10 2,388,799

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Threshing Machine Elements (AREA)

Description

Oct. 9, 1951 r P. N. OTTERSLAND" 2,570,345
ROTARY CHIPPER-KNIFE MOUNTING 2 Sheets-Shee't '1 Filed March 29, 1946 INVENTOR P5 7519-. UZTERSLA N0- Patented Oct. 9, 1951 UNITED STATES PATENT OFFICE 2,570,845 ROTARY CHIPPER-KNIFE MOUNTING Peter N. Ottersland, Watertown, N. Y.
' Application March 29, 1946, Serial No. 657,924
7 Claims.
This invention relates to chipper knives and knife mountings.
Chipper knives are subjected to heavy and severe usage and when used in chipping logs wear rapidly. In order to withstand the severe strains sustained when they engage the logs and cut chips therefrom, they must be made of high grade steel and must be very firmly and rigidly supported.
This invention has for its salient object to provide an improved knife and knife mounting or support so constructed andarranged that the maximum width of the knife can be utilized and the knife will be firmly and rigidly held in all positions of adjustment.
Another object of the invention is to provide a knife and knife mounting so relatively constructed and arranged that the knife can be preadjusted in the knife holder -'or retainer to the proper position prior to clamping the knife and holder in position on the chipper disk.
Further objects of the invention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which Fig. 1-is a fragmentary elevational view of a portion of a chipper disk illustrating a knife and knife mounting constructed in accordance with the invention;
Fig. .2 is a sectional elevation taken substantially on line 2-2 of Fig. 1, looking in the direction of the arrows;
Fig. 3 is a sectional elevation, on'an enlarged scale, taken at right angles to Fig. 2 and illustrating a knife, knife retainer, and clamp secured in operative position on a chipper disk;
Fig. 4 is a view similar to Fig. 3 but illustrating the method or means for adjusting and backing the knife to secure the full use thereof and, furthermore, illustrating a slightly modified means for holding the rear or inner end of the knife retainer in position;
Fig. 5 is an elevational view of the knife retainer bar;
Figs. 6 and 7 are transverse sectional elevations taken substantially on lines 6-.-6 and 'l-'| of Fig. 5, looking in the direction of the arrows;
Fig. 8 is an elevational view of the backing bar used to form a backing support for the knife as it becomes worn and is ground off;
Fig. 9 is an edge view or end elevation of the 7 bar shown in Fig. 8;
Fig. 10 is an elevational view similar to Fig. 8 but showing another form of backing bar; and
-V-shaped recess being illustrated as slabbed off Fig. 11 is an end elevation of the bar shown in Fig. 10.
"vided with transverse slots 31.
The invention briefly described consists of a knife mounting for chipper knives. The chipper disk is recessed to receive a holder for the knife assembly and the knife is adjustably mounted in a retainer bar which is clamped in the holder by clamping means engaging the outer edge portion of the retainer bar and also the inner edge portion thereof. The retainer bar forms an abutment for the knife and in turn abuts against a surface of the holder which is mounted in the :recess or pocket in the chipper disk. The knife is adjustably mounted in the retainer bar and as the cutting edge Wears away and is regrourid :the knife can be adjusted outwardly on the bar to dispose the cutting edge in the correct position relative to the retainer bar. As the knife is so adjusted backing means is secured to the "retainer bar to fill in the space between the rear will be seen that the cutting edge of each knife is disposed tangent to a circle drawn about the axis of the-chipper disk as a center.
The chipper disk 20' and Wear plate 2| are slotted or provided with openings 23 which receive the chips cut from the logs by the knives. The disk 20 has also formed therein a substantially V-shaped recess 25, the inner end of the or fiat as shown at 26. Thewear plate is also recessed, as shown at 27, this recess communi- -cating with the recess 25 of the disk 20 and also with the portion of the slot or opening 23 formed in the wear plate.
Each knife mounting comprises a holder 28 which is substantially V-shapedin section, as shown in Figs. 3 and 4, having angularly disposed portions 29 and 30. The portion 30 has an extension 3| which bears against the surface 32 of is so constructed as to fit within the V- shaped recess 25 formed. in the disk 20.
The knife blade or knife 35 is adjustably mounted in a knife retainer bar 36 which is pro- The retainer bar 36 also has spaced, inclined notches 39 which are cured to the retainer bar by means of bolts 45 which extend through the slots 31.
The V-shaped holder 28 is secured in the recess by means of bolts 46. After the knife has been secured by the bolts to the retainer bar 36 in the manner shown in Fig. 3, the retainer bar is inserted in the holder 28 with the back edge 41 of the bar disposed against the s'ur- I face 48 of the portion 30 of the holder 28. The retainer bar and knife are then clamped in position by means of a clamping bar 59 to which are secured the bolts 46 which extend through the othersurface of the chipper disk and are tightened by means of nuts 51 and locked in tightened position by set screws52. The clamping bar has an under surface 53 which engages a shoulder 54 on the portion 30 of the holder 28 and the other edge of the clamping bar 58 engages the outer edge portion 55 of the retainer bar 36.
In order to securely hold the inner edge portion of the retainer bar 36, an S-shaped spring 56 is secured by a bolt 51 to the portion 30 of the holder, and when the clamping bar 50 is drawn to clamping position the outer end 58 of the spring 55 will be engaged by the under surface of the clamping bar 50', thus forcing the portion 59 of the spring against the inner edge portion of the retainer bar 36 in the manner shown in Fig. 3.
In Fig. 4 the inner edge portion of the retainer bar 36 is held downwardly by a bar 6!! which is forced into engagement with the retainer bar by an under portion 6| of the clamping bar 62.
After the knife has become worn and is relower or inner edge or back of the knife and the abutment surface 44 of the retainer bar 36 is filled in with backing bars sufficiently wide to completely fill this space. In Fig. 4 the backing bar is provided with dowel pins 56 which extend into dowel pin openings 61 formed in the abutment surface 45 of the retainer bar 36. The outer edge of the backing bar 65 is engaged by the inner edge of a second backing bar 68 and the space between the outer edge of this backing bar and the rear edge of the knife is filled in by shims 69. The backing bar 68 is secured in position by bolts Ill which extend through the slots 31. In this manner the necessary backing for the knife is provided at all times regardless of the width of the knife.
Furthermore, it will be evident that the clamping bar 50 will firmly, securely and rigidly hold the knife and knife retainer bar in position with the under surface of the knife disposed against the outer surface ll of the portion 29 of the holder 28.
Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes-in 4 the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention. as expressed in the following claims.
What I claim is:
1. In combination, a rotatable knife carrier having a pocket for receiving a knife and knife mounting, said knife mounting having a knife supporting surface adapted for engagement by the. back surface of the knife and an abutment surface, a knife retainer bar having a rear edge adapted to engage said abutment surface, and
'means for adjustably clamping the knife to said 1 retainer bar and means for clamping said retainer bar and knife in said pocket, said clamping means including resilient means carried by the knife mounting engaging the inner edge portion of the retainer bar.
2. In. combination, a rotatable knife carrier having a pocket, a knife assembly in said pocket and comprising a member having surfaces disposed substantially at right angles to each other,
;one surface being adapted to engage the back surface -of the knife, a knife retainer bar having a rear edge adapted to engage said other pocket surface and havinga shoulder adapted to form a thrust abutment of the knife, means including clamping means engageable with the outer edge portion of the retainer bar and one end of said member for clamping the assembly in the pocket.
3. In combination, a rotatable knife carrier havinga' pocket .;for receiving a knife and knife retainer bar-and-separate and additional means for clamping said retainer bar and knife in said pocket, said'clamping means including means engaging both edges of said retainer bar.
4. In combinatiomaknife carrier having a V- shaped recess, a V-shaped knife mounting holder secured in said recess, a knife retainer, a knife adjustably mounted in said retainer, and means engageable with the edge portions of said retainer for clamping the retainer and knife in the holder with one surface of the knife disposed against one surface of the V-shaped holder and the edge of the retainer :disposed at the innermost portion of the recess and positioned against the other surface of the V-shaped holder;
5 In combination, a knife carrier having a 'V-shapedsupport for a knife, a knife retainer, a
knife disposed against one surface of thet V- shaped support and an edge of the retainer against .the other surface of the V-shaped support 6. In combination, a V-shaped knife holder, a substantially flat knife retainer, means for adjustably mounting a knife on said retainer, and means engageable with the holder and with ,the longitudinaledge portions of the retainer for securing the knife and retainer in said. holder.
.77; In combination, a rotatable chipper disk, a V-shaped knife holder, means for securing the holder to said disk, a substantially fiat knife retainer, meansfor adjustably mounting a knife holder and with the longitudinal edge portions 5 of the retainer for securing the knife and retainer Number in said holder. 375,059 PETER N. OTTERSLAND. 384,491 812,078 REFERENCES CITED 5 335 15 The following references are of record in the 1,683,913 file of this patent: UNITED STATES PATENTS 2,337,407 Number Name Date 10 2,388,799
286,980 White Oct. 16, 1883 6 Name Date Francis Dec. 20, 1887 Allen June 12, 1888 Norton Feb. 6, 1906 Fitts 1 Nov. 6, 1906 Ahrendt Oct. 23, 1928 Hartzell Aug. 3, 1933 Preston et a1 June 29, 1937 Ottersland Dec. 21, 1943 Payzer et a1. Nov. 13, 1945
US657924A 1946-03-29 1946-03-29 Rotary chipper-knife mounting Expired - Lifetime US2570845A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US657924A US2570845A (en) 1946-03-29 1946-03-29 Rotary chipper-knife mounting
DEO1714A DE881751C (en) 1946-03-29 1951-07-18 Knife arrangement for chopping machines with rotating chopping disk
FR1048362D FR1048362A (en) 1946-03-29 1951-07-20 Improvements to surfacing or dressing knives and their mounts
GB17689/51A GB698771A (en) 1946-03-29 1951-07-25 Improvements in and relating to wood chipping machines
SE9767/69A SE323872B (en) 1946-03-29 1969-07-09
US05/862,320 US4155384A (en) 1946-03-29 1977-12-20 Disk type wood chipper

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US657924A US2570845A (en) 1946-03-29 1946-03-29 Rotary chipper-knife mounting
DEO1714A DE881751C (en) 1946-03-29 1951-07-18 Knife arrangement for chopping machines with rotating chopping disk
GB17689/51A GB698771A (en) 1946-03-29 1951-07-25 Improvements in and relating to wood chipping machines
SE7600014A SE407891B (en) 1976-01-02 1976-01-02 HYDRAULIC TURNING DEVICE FOR Lighter SWING PLOW

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682375A (en) * 1952-03-05 1954-06-29 Charles A Johnson Rotary chipper knife blade mounting
US2697557A (en) * 1952-03-17 1954-12-21 Murray D J Mfg Co Wood chipper
US2712904A (en) * 1952-11-28 1955-07-12 Murray D J Mfg Co Unitary wood chipping disk with removable knife assembly and independent wear plate
US2890730A (en) * 1955-12-23 1959-06-16 Jack L Gottlieb Multiple boring machines
US3061207A (en) * 1960-06-09 1962-10-30 Soderhamn Machine Mfg Co Rotary wood chippers
US3220447A (en) * 1963-05-03 1965-11-30 Justin J Marquez Method of cutting with a convertible chip knife
US3415297A (en) * 1966-06-20 1968-12-10 Lewis M. Yock Machine for chipping core logs and veneer
US3746062A (en) * 1970-06-12 1973-07-17 Pitea Maskin Industri Wood chipper or the like
US3776288A (en) * 1967-04-12 1973-12-04 D Johnson Blade assemblies for flacing apparatus
US3785425A (en) * 1972-06-29 1974-01-15 Quaker Oats Co Doctor blade for controlling bulk density of dehydrated cereal products
US5080153A (en) * 1991-01-18 1992-01-14 Waterman Carl D Blade adjusting means for the cutter heads of wood chippers

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US286980A (en) * 1883-10-16 white
US375059A (en) * 1887-12-20 Tool-holder
US384491A (en) * 1888-06-12 Half to lewis c
US812078A (en) * 1902-05-26 1906-02-06 Martin Henry Norton Knife-holder for veneer-lathes.
US835156A (en) * 1904-06-01 1906-11-06 John F Wilts Wood-slicing machine.
US1688913A (en) * 1927-05-11 1928-10-23 Harry T Ahrendt Cope head for tenoners and the like
US1921183A (en) * 1931-01-26 1933-08-08 Hartzeil Ind Inc Process for making veneer and alpha veneer machine
US2085603A (en) * 1934-10-26 1937-06-29 Black & Decker Mfg Co Manually portable power-driven rotary planer
US2337407A (en) * 1941-06-28 1943-12-21 Peter N Ottersland Knife mounting
US2388799A (en) * 1944-07-21 1945-11-13 Murray D J Mfg Co Chipper knife assembly

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US286980A (en) * 1883-10-16 white
US375059A (en) * 1887-12-20 Tool-holder
US384491A (en) * 1888-06-12 Half to lewis c
US812078A (en) * 1902-05-26 1906-02-06 Martin Henry Norton Knife-holder for veneer-lathes.
US835156A (en) * 1904-06-01 1906-11-06 John F Wilts Wood-slicing machine.
US1688913A (en) * 1927-05-11 1928-10-23 Harry T Ahrendt Cope head for tenoners and the like
US1921183A (en) * 1931-01-26 1933-08-08 Hartzeil Ind Inc Process for making veneer and alpha veneer machine
US2085603A (en) * 1934-10-26 1937-06-29 Black & Decker Mfg Co Manually portable power-driven rotary planer
US2337407A (en) * 1941-06-28 1943-12-21 Peter N Ottersland Knife mounting
US2388799A (en) * 1944-07-21 1945-11-13 Murray D J Mfg Co Chipper knife assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682375A (en) * 1952-03-05 1954-06-29 Charles A Johnson Rotary chipper knife blade mounting
US2697557A (en) * 1952-03-17 1954-12-21 Murray D J Mfg Co Wood chipper
US2712904A (en) * 1952-11-28 1955-07-12 Murray D J Mfg Co Unitary wood chipping disk with removable knife assembly and independent wear plate
US2890730A (en) * 1955-12-23 1959-06-16 Jack L Gottlieb Multiple boring machines
US3061207A (en) * 1960-06-09 1962-10-30 Soderhamn Machine Mfg Co Rotary wood chippers
US3220447A (en) * 1963-05-03 1965-11-30 Justin J Marquez Method of cutting with a convertible chip knife
US3415297A (en) * 1966-06-20 1968-12-10 Lewis M. Yock Machine for chipping core logs and veneer
US3776288A (en) * 1967-04-12 1973-12-04 D Johnson Blade assemblies for flacing apparatus
US3746062A (en) * 1970-06-12 1973-07-17 Pitea Maskin Industri Wood chipper or the like
US3785425A (en) * 1972-06-29 1974-01-15 Quaker Oats Co Doctor blade for controlling bulk density of dehydrated cereal products
US5080153A (en) * 1991-01-18 1992-01-14 Waterman Carl D Blade adjusting means for the cutter heads of wood chippers

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