US3762047A - Cutter bar with speed tip - Google Patents
Cutter bar with speed tip Download PDFInfo
- Publication number
- US3762047A US3762047A US00223994A US3762047DA US3762047A US 3762047 A US3762047 A US 3762047A US 00223994 A US00223994 A US 00223994A US 3762047D A US3762047D A US 3762047DA US 3762047 A US3762047 A US 3762047A
- Authority
- US
- United States
- Prior art keywords
- bar
- chain
- connectors
- flange
- assembly
- 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
Links
Images
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
- B27B17/025—Composite guide bars, e.g. laminated, multisectioned; Guide bars of diverse material
-
- 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
- B27B17/04—Roller bearing guides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/707—By endless band or chain knife
- Y10T83/7264—With special blade guide means
Definitions
- the saw chain bar is used to locate, support and guide the saw chain throughout its periphery while cutting wood. This can be done in the longitudinal or transverse direction of the wood grain. During the cutting action of the saw chain the nose end of the saw bar is subjected to great strain and friction, and this results in severe overheating and wear of the metal forming the bar. In addition this condition results in reducing the applied power available for wood cutting.
- a cutter bar according 'to this invention has a nose assembly secured to the outer end thereof, this assembly forming the effective outer Y or nose end of the bar.
- a sprocket is so located within the assembly as to carry the saw chain around the end of the assembly with the portions of the chain, which travel or ride on the side or rail edges of the guide bar, clear of the side edges of the assembly. This greatly reduces the friction created at the nose end of the bar.
- a very important feature is that the nose assembly is no thicker than the guide bar, and yet the assembly interlocks with the bar so that the assembly is well supported at the bar end.
- Bracing means is provided between the bar and the assembly, and the construction is such that, although the assembly is fixedly secured to the bar, it can easily be removed for replacement or when it is necessary to use a sprocket of a different pitch.
- a chain saw cutter bar in accordance with the present invention comprises an elongated guide bar having a slot in each of opposite side edges thereof in which the drive lugs or tangs of a saw chain can travel with portions of said chain riding on the side edges, a nose assembly secured to and projecting beyond an outer end of the bar and in the plane of said bar, said assembly being no thicker than the guide bar, and a sprocket rotatably mounted within the nose assembly having a pitch to receive the drive lugs or nose and positioned to guide the saw chain around said assembly with said chain portions clear of the assembly.
- This nose assembly includes parallel face plates with the sprocket rotatably mounted therebetwe'en. Connectors extend from these plates into recesses formed in the opposite faces of the guide bar at the end thereof,
- FIG. 1 is a reduced side view of a cutter bar in accordance with this invention
- FIG. 2 is an enlarged side elevation of the outer or nose end of the bar, with part of the nose assembly broken away,
- FIG. 3 is a longitudinal section taken on the line 3-3 of FIG. 2,
- FIG. 4 is a cross section taken on the line 44 of FIG. 2, and
- FIG. 5 is an exploded perspective view of the nose assembly and the adjacent end of the bar.
- 10 is a chain saw cutter bar which is adapted to be connected to the power unit of a chain saw in the usual manner.
- This bar has the usual opposite side edges 12 and 13 with slots 16 and 17 therein.
- a standard saw chain 20, shown in broken lines in FIG. 2 has drive links with lugs or tangs 22 which ride in slots 16 and 17 as the chain moves around the guide bar. As the chain travels along edges 12 and 13, portions thereof, usually side links 23, ride on said edges.
- the drive arrangement for the chain has not been shown since it is well known, and the description of it is not required herein.
- a nose assembly 28 is secured to and projects beyond the outer end 29 of bar l0.
- This assembly is made up of a pair of spaced-apart, parallel face plates 32 and 33. These platesare spaced apart by an inner race 36, said plates being secured to each other and to the race in any suitable manner, such as by a plurality of rivets 37 extending through the plates and the race.
- a plurality of bearings 40 surround race 36 and carry an idler sprocket 42 which has a pitch suitable for the chain 20. Sprocket 42 is mounted between plates 32 and 33 for rotation around a central axis 44.
- Face plates 32 and 33 have edges 46 which, when assembly 28 is mounted on bar 10, extend outwardly from edge 12 of the bar and around in a curved section 47 centered on axis 44 and to the other edge 13 of the bar.
- the radius of curve 47 is less than the radius of sprocket 42 so that the teeth 49 of the sprocket project outwardly from between the face plates as they travel around curve 47.
- Rectangular recesses 52 and 53 are formed in opposite faces of bar 10, and extend longitudinally thereof and open out from the end 29 of the bar. A portion of bar 10 is left between recesses 52 and 53 in the form of a flange or web 55. Although not absolutely necessary, it is desirable to cut web 55 to form a relatively large slot 58 therein which .is substantially rectangular in shape and opens out through the end 29 of the bar. This slot leaves web 55 in the form of a flange extending along the boundary edges of recesses 52 and 53. Edges 59 and 60 of web 55 form opposed boundaries for slot 58.
- Connectors in the form of extensions 62 and 63 project from plates 32 and 33, respectively, and are shaped to fit within recesses 52 and 53 on opposite sides thereof and overlapping flange 55.
- a spacer 65 is positioned between connectors 62 and 63 and is shaped to fit into slot 58. This spacer has a widened end 66 which is located between face plates 32 and 33, said end being curved as at 67 so as to be as close as possible to but spaced from sprocket 42.
- the connectors and spacer 65 is secured together in any suitable manner, and in the illustrated example, a plurality of rivets 70 extend through connectors 62 and 63 and spacer 65, and rivets 71 extend through plates 32 and 33 and connector end 66 for this purpose.
- Spacer 65 preferably is formed with machined edges 72 and 73 which fit against edges 59 and 60 of web 55.
- Plates 32 and 33 have inner edges 74 that abut against squared ends 75 on the end of guide bar 10.
- a chain saw cutter bar comprising an elongated guide bar having a slot in each of opposite side edges thereof in which the drive tangs of a saw chain can travel with portions of said chain riding on the side edges, rectangular recesses in opposite faces of the bar and opening out from an outer end thereof, each of said recesses being spaced from the opposite side edges of the bar and having opposed edges extending longitudinally of the bar, a nose assembly projecting outwardly beyond the outer end of the bar and in the plane thereof, said assembly being no thicker than the bar and comprising a pair of spaced-apart face plates secured to each other, a connector extending from each plate shaped to fit snugly within one of said recesses, means securing said connectors to the bar, said plates having curved edges extending from one of said side edges of the bar around to the other of said side edges thereof, a sprocket rotatably mounted between and completely within the face plates and having a pitch to receive drive tangs projecting inwardly between the face plates and positioned to guide the saw
- a cutter bar as claimed in claim 1 including an inner race extending between and fixedly secured to the face plates, and bearings around the periphery of the race, said sprocket being carried by the bearings.
- a cutter bar as claimed in claim 1 including an inner race extending between and fixedly secured to the face plates, and bearings around the periphery of the race, said sprocket being carried by the bearings.
- a chain saw cutter bar as claimed in claim 1 including squared ends on the outer end of the guide bar extending outwardly from the recesses thereof to the bar side edges, and shoulders formed on said face plates on opposite sides of the connectors thereof and abutting against the squared ends of the bar.
- a chain saw cutter bar as claimed in claim 4 including a flange projecting from the bar into the recesses thereof along the edges defining said recesses and substantially midway between the bar faces, said connectors overlapping the flange, a slot in said flange extending longitudinally of the bar, and a spacer shaped to fit snugly in said slot and secured to the face plate connectors.
- a chain saw cutter bar as claimed in claim 4 in which said means securing the connectors to the bar comprises a rivet extending through both connectors and the flange therebetween.
- a chain saw cutter bar comprising an elongated guide bar having a slot in each of opposite side edges thereof in which the drive tangs of a saw chain can travel with portions of said chain riding on the side edges, rectangular recesses in opposite faces of the bar and openingout from an outer end thereof, a flange projecting from the bar into the recesses around the edge defining the recesses and substantially midway between the bar faces, a nose assembly projecting outwardly beyond the outer end of the bar and in the plane thereof, said assembly being no thicker than the bar and comprising a pair of spaced-apart face plates secured to each other, a connector extending from each plate into and fitting within one of said recesses and overlapping said flange, means securing the connectors to the flange, a sprocket rotatably mounted between the face plates and having a pitch to receive the drive tangs and positioned to guide the saw chain around said assembly with said chain portions clear of the assembly.
- a cutter bar as claimed in claim 7 including a spacer between and secured to the face plate connectors, said spacer fitting in a slot within the flange.
- a cutter bar as claimed in claim 7 in which said face plates have ends bearing against squared ends on the guide bar.
- a cutter bar as claimed in claim 7 including a spacer between and secured to the face plate connec- 13.
- a cutter bar as claimed in claim 1 including a spacer between and secured to the face plate connectors said spacer fitting snugly within a slot in the flange, and said face plates having ends bearing against squared ends on the guide bar.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22399472A | 1972-02-07 | 1972-02-07 | |
AU57894/73A AU454285B2 (en) | 1972-02-07 | 1973-07-09 | Cutter bar with speed tip |
DE2339301A DE2339301C3 (de) | 1972-02-07 | 1973-08-03 | Sägekettenführung mit einem Führungsschwert und an dessen Enden befestigte Umlenkeinrichtungen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3762047A true US3762047A (en) | 1973-10-02 |
Family
ID=61569505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00223994A Expired - Lifetime US3762047A (en) | 1972-02-07 | 1972-02-07 | Cutter bar with speed tip |
Country Status (3)
Country | Link |
---|---|
US (1) | US3762047A (de) |
AU (1) | AU454285B2 (de) |
DE (1) | DE2339301C3 (de) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3878607A (en) * | 1974-06-27 | 1975-04-22 | Mcculloch Corp | Chain saws |
US3955279A (en) * | 1975-05-19 | 1976-05-11 | Omark Industries, Inc. | Guide bar for chain saw having a replaceable nose portion |
US3987544A (en) * | 1976-04-30 | 1976-10-26 | Omark Industries, Inc. | Chain saw guide bar with detachable nose |
US4060895A (en) * | 1976-11-15 | 1977-12-06 | Omark Industries, Inc. | Non-symmetrical bar with reversible body portion |
EP0026053A1 (de) * | 1979-08-31 | 1981-04-01 | Windsor Machine Company Limited | Führungsschwert für Sägeketten |
DE3109511A1 (de) * | 1980-03-14 | 1981-12-24 | Sandvik AB, 81181 Sandviken | Fuehrungsschiene fuer eine kettensaege |
EP0074207A2 (de) * | 1981-08-24 | 1983-03-16 | Cornelis Johannes Maria Beerens | Führungsschiene von Kettensäge |
EP0101693A1 (de) * | 1982-02-17 | 1984-03-07 | Cornelis Johannes Maria Beerens | Kettensägenschwert |
FR2533489A1 (fr) * | 1982-09-23 | 1984-03-30 | Omark Industries Inc | Barre de guidage segmentee pour scie a chaine |
US4489493A (en) * | 1982-07-21 | 1984-12-25 | Suehiro Seiko Kabushiki Kaisha | Chain saw guide bar |
US4722141A (en) * | 1985-04-23 | 1988-02-02 | Windsor Machine Co., Limited | Chain saw cutter bar-nose assembly |
US4924577A (en) * | 1987-06-10 | 1990-05-15 | Sandvik Ab | Chainsaw guidebar |
US5461789A (en) * | 1992-10-28 | 1995-10-31 | Beerens; Thomas | Roller nose chain saw guide bar |
US20170100852A1 (en) * | 2015-10-07 | 2017-04-13 | Andreas Stihl Ag & Co. Kg | Guide Bar |
USD785426S1 (en) * | 2014-07-16 | 2017-05-02 | Suehiro Seiko Kabushiki Kaisha | Guide bar for chain saw |
US20200001493A1 (en) * | 2015-07-27 | 2020-01-02 | Robert Bosch Gmbh | Power-Tool Cutting Device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2316997A (en) * | 1940-08-29 | 1943-04-20 | Reed Prentice Corp | Tensioning means for chain saws |
US2693206A (en) * | 1952-08-08 | 1954-11-02 | Walter J Anttonen | Chain saw with outboard end idler pulley |
US2888964A (en) * | 1958-05-05 | 1959-06-02 | Remington Arms Co Inc | Removable roller bearing guide |
US3124177A (en) * | 1964-03-10 | Chain saw machine |
-
1972
- 1972-02-07 US US00223994A patent/US3762047A/en not_active Expired - Lifetime
-
1973
- 1973-07-09 AU AU57894/73A patent/AU454285B2/en not_active Expired
- 1973-08-03 DE DE2339301A patent/DE2339301C3/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3124177A (en) * | 1964-03-10 | Chain saw machine | ||
US2316997A (en) * | 1940-08-29 | 1943-04-20 | Reed Prentice Corp | Tensioning means for chain saws |
US2693206A (en) * | 1952-08-08 | 1954-11-02 | Walter J Anttonen | Chain saw with outboard end idler pulley |
US2888964A (en) * | 1958-05-05 | 1959-06-02 | Remington Arms Co Inc | Removable roller bearing guide |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3878607A (en) * | 1974-06-27 | 1975-04-22 | Mcculloch Corp | Chain saws |
US3955279A (en) * | 1975-05-19 | 1976-05-11 | Omark Industries, Inc. | Guide bar for chain saw having a replaceable nose portion |
US3987544A (en) * | 1976-04-30 | 1976-10-26 | Omark Industries, Inc. | Chain saw guide bar with detachable nose |
US4060895A (en) * | 1976-11-15 | 1977-12-06 | Omark Industries, Inc. | Non-symmetrical bar with reversible body portion |
EP0026053A1 (de) * | 1979-08-31 | 1981-04-01 | Windsor Machine Company Limited | Führungsschwert für Sägeketten |
US4259783A (en) * | 1979-08-31 | 1981-04-07 | Windsor Machine Company Limited | Bar jointing |
DE3109511A1 (de) * | 1980-03-14 | 1981-12-24 | Sandvik AB, 81181 Sandviken | Fuehrungsschiene fuer eine kettensaege |
EP0074207A2 (de) * | 1981-08-24 | 1983-03-16 | Cornelis Johannes Maria Beerens | Führungsschiene von Kettensäge |
EP0074207A3 (de) * | 1981-08-24 | 1984-03-28 | Cornelis Johannes Maria Beerens | Führungsschiene von Kettensäge |
EP0101693A4 (de) * | 1982-02-17 | 1985-10-14 | Beerens Cornelis J | Kettensägenschwert. |
EP0101693A1 (de) * | 1982-02-17 | 1984-03-07 | Cornelis Johannes Maria Beerens | Kettensägenschwert |
US4489493A (en) * | 1982-07-21 | 1984-12-25 | Suehiro Seiko Kabushiki Kaisha | Chain saw guide bar |
FR2533489A1 (fr) * | 1982-09-23 | 1984-03-30 | Omark Industries Inc | Barre de guidage segmentee pour scie a chaine |
US4561181A (en) * | 1982-09-23 | 1985-12-31 | Omark Industries, Inc. | Replaceable nose assembly for chain saw guide bar |
US4722141A (en) * | 1985-04-23 | 1988-02-02 | Windsor Machine Co., Limited | Chain saw cutter bar-nose assembly |
US4924577A (en) * | 1987-06-10 | 1990-05-15 | Sandvik Ab | Chainsaw guidebar |
US5461789A (en) * | 1992-10-28 | 1995-10-31 | Beerens; Thomas | Roller nose chain saw guide bar |
US5537751A (en) * | 1992-10-28 | 1996-07-23 | Beerens; Thomas | Roller nose chain saw guide bar |
USD785426S1 (en) * | 2014-07-16 | 2017-05-02 | Suehiro Seiko Kabushiki Kaisha | Guide bar for chain saw |
US20200001493A1 (en) * | 2015-07-27 | 2020-01-02 | Robert Bosch Gmbh | Power-Tool Cutting Device |
US20170100852A1 (en) * | 2015-10-07 | 2017-04-13 | Andreas Stihl Ag & Co. Kg | Guide Bar |
Also Published As
Publication number | Publication date |
---|---|
DE2339301B2 (de) | 1979-01-04 |
AU454285B2 (en) | 1974-10-10 |
DE2339301C3 (de) | 1979-08-30 |
AU5789473A (en) | 1974-10-24 |
DE2339301A1 (de) | 1975-02-20 |
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