US3250304A - Chain saw bar - Google Patents

Chain saw bar Download PDF

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Publication number
US3250304A
US3250304A US365940A US36594064A US3250304A US 3250304 A US3250304 A US 3250304A US 365940 A US365940 A US 365940A US 36594064 A US36594064 A US 36594064A US 3250304 A US3250304 A US 3250304A
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US
United States
Prior art keywords
chain
groove
spacer
saw
wear
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
US365940A
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English (en)
Inventor
Merz Max
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.)
Borg Warner Corp
Original Assignee
Borg Warner Corp
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
Application filed by Borg Warner Corp filed Critical Borg Warner Corp
Priority to US365940A priority Critical patent/US3250304A/en
Priority to GB9995/65A priority patent/GB1059191A/en
Priority to CH434265A priority patent/CH441709A/de
Application granted granted Critical
Publication of US3250304A publication Critical patent/US3250304A/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
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar

Definitions

  • This invention relates to an improved chain saw bar of the type utilizing insertable wear strips for supporting the chain saw and more particularly, to an improved chain saw bar and wear strip structure.
  • the anchor structure portion provided for by the dovetail is subject to direct abrasion and destructive upsetting from provided for retaining the wear strips in operating position in a relatively inexpensive simple manner and in a manner so as to avoid inducing undue stresses in the chain saw bar and to prevent direct abrasion and destructive upsetting of the wear strips from the action of the chain both during the initial operation of the chain and after the strips have become worn.
  • Another object of this invention is to provide a chain saw bar having an insertable wear strip and an improved structure for retaining the wear strip so as to avoid direct abrasion and upsetting of the wear strip retaining structure from the action of the chain during the operation there of and thereby providing a safe, effective and reliable wear strip and wear strip securing means.
  • the present invention provides, among other things, a chain saw bar wherein guide plates are positioned on a center spacer member to provide a bar having a groove therein for slidably receiving a saw chain, and wherein a chain supporting wear strip is provided in the groove and is reta-ined by structure extending from one or more of the guide plates into the groove.
  • FIG. 1 is a side view of a chain saw bar showing the relative position of the parts thereof including the novel 3,250,304 Patented May 10, 1966 wear strip retainers extending from the side plates into the groove of the bar.
  • FIG. 2 is a partial cross sectional view taken along line 22 of FIG. 1 showing the engagement of the saw chain with an unworn wear strip within the groove and the position of the wear strip retaining structure.
  • FIG. 3 is a partial cross sectional view similar to FIG. 2 showing the engagement of the saw chain with the wear strip which cause the wear strip to be worn from repeated engagement with aligned supporting links of the moving saw chain.
  • FIG. 4 is a side view of the right or outermost end portion of the chain saw bar with one side plate removed illustrating an appropriate position for the novel wear strip retaining structure.
  • FIG. 5 is a partial cross sectional View taken along line 55 of FIG. 4 showing a particularly shaped wear strip retaining structure utilized to'illustrate the present invention.
  • FIG. 6 is a partial cross sectional view similar to FIG. 5 showing the employment of a single retainer.
  • a chain saw bar generally represented by the numeral 10, which is adapted at the left (FIG. 1) to be secured to a chain saw drive assembly (not shown).
  • the chain saw bar 10 is made to include generally a center spacer member 11 (FIGS. 1 and 5), outer guide plates 12, a saw chain 13, a typical bearing assembly 14, wear strips 15 and wear strip retaining structures 16.
  • the guide plates 12 are respectively secured to the sides of the spacer 11 and extend beyond the spacer 11 so as to form a groove 20.
  • the bearing assembly 14 is secured between the right or outer end portions of the guide plates 12 (FIGS. 1 and 5) in a bearing retainer aperture 21 formed in the plates 12.
  • the bearing assembly 14 is adapted to receive the chain 13 to guide the chain around the outer or right end of the bar 10.
  • the spacer 11 is provided with generally arcuate surfaces 25 against which the Wear strips 15 are positioned in arched relation thereto for slidably and resiliently supporting the saw chain 13.
  • the wear strips 15 are held in their arched chain supporting position and against longitudinal movement with the chain 13 by the Wear strip retaining structures 16.
  • the wear strip retainer structures 16 are extruded from the guide plates 12.
  • the retainers 16 are provided with a retaining surface 30 which is adapted to complementally engage a surface 31 formed on the end of the wear strip. It should be noted that a single retaining structure 16 (FIG. 6) could be provided to independently retain each end of the wear strip without having a similar opposed retaining structure in the manner illus trated in FIG. 5.'
  • the retainers 16 are shown (FIGS. 1-5) in opposite opposed pairs to illustrate the most desirable structure example thereof.
  • aligned supporting links of the chain (center links in-FIGS. 2 and 3) will ride on the center of the Wear strip 15 in a manner illustrated in FIG. 2. Further, as the wear strip is used in conjunction with the chain 13, the wear strip 15 will wear adjacent the center supporting links from the action of the center links and will develop a groove 32 (FIG. 3).
  • the retainers 16 extend inwardly from the respective side plates 12 a spaced apart distance and thereby do not engage the strips 15 beneath the aligned center supporting links of the chain.
  • a chain saw bar comprising a center spacer memher, a guide plate positioned on each side of said spacer and extending beyond said spacer to provide a groove on the periphery of the spacer between the plates for receiving a saw chain, a wear strip positioned within the groove for slidably supporting the saw chain, and retaining means extending from one of said guide plates into the groove for retaining said strip against movement with the chain.
  • a chain saw bar comprising a center spacer member, a pair of guide plates respectively positioned on the sides of said spacer and extending beyond said spacer to provide a groove on the periphery of the spacer between the plates for slidably receiving a saw chain therein, and a wear strip positioned within the groove for slidably supporting the saw chain, said guide plates having opposed portions thereof extended inwardly into the groove and adapted to engage said strip for retaining the strip against movement with the chain.
  • a chain saw bar comprising a center spacer member, a pair of guide plates respectively positioned on the sides of said spacer and extending beyond said spacer to provide a groove on the periphery of the spacer between the plates for slidably receiving a saw chain, a wear strip positioned within the groove for slidably supporting the saw chain, and pairs of opposed retaining members extending from said plates into the groove for retaining the ends of the strip to hold the strips against movement with the chain within the groove.
  • a chain saw bar comprising -a center spacer member, a pair of guide plates respectively positioned on the sides of said spacer and extending beyond said spacer to provide a longitudinal groove on the periphery of said spacer between said plates for slidably receiving a saw chain, wear strips positioned longitudinally within the groove for slidably supporting the saw chain, said wear strips having oppositely tapered ends, a pair of laterally opposed retaining members extending from said plates into the groove adjacent the ends of said strips and adapted to complementally engage respective ends of said strips to retain said strips in the groove against movement With said chain.
  • a chain saw bar of the type used in conjunction with a chain saw chain having aligned center supporting links comprising a center spacer member, a pair of guide plates respectively positioned on the sides of said spacer and extending beyond'said spacer to provide a longitudinal groove on the perh-iphery of said spacer between said plates for slidably receiving a saw chain, a wear strip positioned within the groove for engagement with the aligned supporting links of a saw chain from beneath the chain to slidably support the chain by supporting said links, and Wear strip retainer members extending inwardly from said plates into the groove in engagement with said strip beneath the unsupported chain links for retaining said strips.
  • a chain saw bar of the type used in conjunction with a chain saw chain having aligned center. supporting links comprising a center spacer member slightly wider than the saw chain to be received therein, a pair of guide plates respectively positioned on the sides of said spacer and extending beyond said spacer to provide a longitudinal groove on the periphery of said spacer between said plates for slidably receiving the saw chain, a wear strip pos-itionedwithin the groove for engagement with the aligned supportinglinks of the chain to slidably support the chain, and laterally opposed retainer members extending inwardly from said plates into the groove and spaced apart a distance sufiiciently greater than the thickness of the supported center links of the chain so that said strips are not supported beneath the supporting link of said chain.
  • DONALD R. SCHRAN Primary Examiner.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
US365940A 1964-05-08 1964-05-08 Chain saw bar Expired - Lifetime US3250304A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US365940A US3250304A (en) 1964-05-08 1964-05-08 Chain saw bar
GB9995/65A GB1059191A (en) 1964-05-08 1965-03-09 Chain saw bar
CH434265A CH441709A (de) 1964-05-08 1965-03-30 Kettensägenstange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US365940A US3250304A (en) 1964-05-08 1964-05-08 Chain saw bar

Publications (1)

Publication Number Publication Date
US3250304A true US3250304A (en) 1966-05-10

Family

ID=23441019

Family Applications (1)

Application Number Title Priority Date Filing Date
US365940A Expired - Lifetime US3250304A (en) 1964-05-08 1964-05-08 Chain saw bar

Country Status (3)

Country Link
US (1) US3250304A (de)
CH (1) CH441709A (de)
GB (1) GB1059191A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390710A (en) * 1966-04-14 1968-07-02 Outboard Marine Corp Chain saw
US4837934A (en) * 1987-07-31 1989-06-13 Krohn Paul F Lightweight chain saw bar
FR2769528A1 (fr) * 1997-10-10 1999-04-16 Stihl Maschf Andreas Garniture de coupe peu bruyante pour une scie a chaine a moteur
US6427342B1 (en) 2000-08-29 2002-08-06 Blount, Inc. Lightweight chain saw bar
US20140250701A1 (en) * 2013-03-05 2014-09-11 Andreas Stihl Ag & Co. Kg Guide bar having a carbon fiber reinforced plastic insert

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4627322A (en) * 1985-09-17 1986-12-09 Lebever Co. Circular saw blade assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390710A (en) * 1966-04-14 1968-07-02 Outboard Marine Corp Chain saw
US4837934A (en) * 1987-07-31 1989-06-13 Krohn Paul F Lightweight chain saw bar
FR2769528A1 (fr) * 1997-10-10 1999-04-16 Stihl Maschf Andreas Garniture de coupe peu bruyante pour une scie a chaine a moteur
US6427342B1 (en) 2000-08-29 2002-08-06 Blount, Inc. Lightweight chain saw bar
US20140250701A1 (en) * 2013-03-05 2014-09-11 Andreas Stihl Ag & Co. Kg Guide bar having a carbon fiber reinforced plastic insert
US9272438B2 (en) * 2013-03-05 2016-03-01 Andreas Stihl Ag & Co. Kg Guide bar having a carbon fiber reinforced plastic insert

Also Published As

Publication number Publication date
GB1059191A (en) 1967-02-15
CH441709A (de) 1967-08-15

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