US3680608A - Chain saw - Google Patents

Chain saw Download PDF

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Publication number
US3680608A
US3680608A US7569A US3680608DA US3680608A US 3680608 A US3680608 A US 3680608A US 7569 A US7569 A US 7569A US 3680608D A US3680608D A US 3680608DA US 3680608 A US3680608 A US 3680608A
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US
United States
Prior art keywords
carrier
combustion engine
chain
chain saw
housing
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
US7569A
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English (en)
Inventor
Heinz Emmerich
Eggert Bulk
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.)
Solo Kleinmotoren GmbH
Original Assignee
Solo Kleinmotoren GmbH
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 Solo Kleinmotoren GmbH filed Critical Solo Kleinmotoren GmbH
Application granted granted Critical
Publication of US3680608A publication Critical patent/US3680608A/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
    • B27B17/0033—Devices for attenuation of vibrations

Definitions

  • ABSTRACT A portable chain saw having an elongated chain carrier about whose circumferential edge portion a saw chain travels. Grip means is rigid with the carrier for gripping by the hands of an operator. An internal combustion engine is provided for imparting to the chain its travelling movement along the edge portion of the carrier. Connecting means connects the combustion engine with the carrier so that they constitute a unit but without transmitting vibrations between the combustion engine and thecarrier.
  • Hand grips are provided so that the unit can be held by an operator.
  • One prior-art construction of such a portable chain saw has the combustion engine and its fuel and oil tank as well as the hand grips connected with one another into a rigid unit, to which in turn the elongated chain carrier is rigidly connected. Vibrations originating in the chain saw, usually from the combustion engine, aretransmitted in this construction to the arms of the operator and thus to the body of the latter. Evidently, this at the very least results in premature fatigue, and may even lead to damage to the health of the operator.
  • a portable chain saw which, briefly stated, comprises an elongated chain carrier having a circumferential edge portion, and a saw chain mounted on the carrier for movement circumferentially of the same along the edge portion.
  • Grip means is rigid with the carrier for gripping by the hands of an operator.
  • An internal combustion engine is provided for imparting to the chain its movement along the edge portion.
  • connecting means which connects the combustion engine with the carrier so that they constitute a unit, but in such a manner as not to transmit vibrations between the combustion engine and the carrier.
  • the invention provides that the longitudinal axis of the cylinder of the combustion engine extend normal to the longitudinal axis of the elongated chain carrier, that the rotating masses of the combustion engine are balanced and the reciprocating masses are imbalanced, and that the combustion engine is fixed against movement lengthwise of the elongated chain carrier by the provision of a distance or spacing element.
  • the forces which tend to effect such advancement for instance the force of the travelling chain as the same cuts through wood or the like, and which act upon the internal combustion engine which is mounted in non-vibration transmitting manner, cannot produce such displacement so that the chain cannot lose its tension and become dislocated from the drive pinion.
  • the spacing or distance element is advantageously configurated as a member which is pivotably mounted on the housing of the saw and on the combustion engine. However, it may also be in form of a first abutment provided on the housing and a second abutment provided on the internal combustion engine and engaging the first abutment if and when the combustion engine tends to move lengthwise of the chain carrier. It will be realized that although lengthwise displacement of the combustion engine with reference to the chain carrier is not possible, displacement in direction transversely to such lengthwise displacement-that is normal to longitudinal axis of the carrier-remains possible so that the transmission of vibration is precluded.
  • the vibration damping eflect becomes the more pronounced, the larger the mass of the non-vibrating components is with reference to the mass of the vibrating components. It is therefore a concept of the present invention to mount all possible auxiliary components on the nonvibrating housing, that is all such auxiliary components which must not be absolutely mounted rigid with the combustion engine itself.
  • the carburetor for the combustion engine is mounted on the housing and is connected with the cylinder of the combustion engine via a vibration damping conduit member so that fuel can pass from the carburetor to the cylinder of the combustion engine but without the transmission of vibration between the two.
  • the conduit member may consist of rubber or generally an elastomeric material, and it fullfils the additional function of providing thermal insulation between the cylinder and the carburetor.
  • FIG. 1 is a diagrammatic fragmentary longitudinal section through a chain saw embodying the invention
  • FIG. 2 is' a section taken on the line II-ll of FIG. 1;
  • FIG. 3 is a viewsimilar to FIG.'1 but illustrating a The non-vibrating section consist essentially of a nected to the housing 11, a fuel tank 13, an oil tank 14 and handgrips 15, 16 by which an operator holds the chain saw when the latter is to be used.
  • a cover 17 is provided which is fast with'the housing 11 and which covers the pinion and the clutch it also serves for mounting of the chain carrier 12.
  • a carburetor 18 and an air filter 19 with a cover 20 are'also provided as part of the non-vibrating section.
  • the distance or spacing member I 25 comprises an abutment 29 on the housing 11, which abutment is provided with a surface located in a plane normal to the longitudinal axis 24 of the chain carrier 12.
  • a second abutment 30 is provided on the crankshaft casing 2 of the combustion engine 1 and cooperates with the abutment 29 in such a manner that they contact one another if the combustion engine 1 tends to move in direction of the axis 24 of the chain carrier 12, thereby precluding such movement.
  • the longitudinal axis 31 of the cylinder 3 of the internal combustion engine 1 extendsnormal or at leastsubstantially normal to the longitudinal axis24 of the chain carrier 12, and the carburetor l8which is sensitive to vibrations-ismounted on the housing 11.
  • the two are connected via a vibration damping elastic conduit member '32 which may consist of rubber or a suitable synthetic plastic.
  • the conduit member 32 thus not only serves a vibration damping function while also permitting the flow of fuel from the carburetor 18 to the cylinder 3, but also prevents the transmission of thermal energy. between the combustion engine 1 and the carburetor 18.
  • the combustion engine be so balanced that mass forces develop onlyin direction normal to the longitudinal axis 24 of the chain carrier 12. This providesforoptimum damping, and for this purpose the rotating the reciprocating masses remain imbalanced.
  • the internal combustion engine can freely vibrate with reference to the non-vibrating components of the chain saw and the vibrating masses are reduced to a minimum whereas the proportion of the nonvibrating masses with reference to the vibrating masses is increased.
  • the combustion engine as softly as desirable for purposes of obtaining optimum vibration damping, that is to construct the connecting means 21in such a manner that the combustion engine 1 can vibrate with reference to the non-vibrating components of the chain saw to any practicable extent, without adversely influencing the handling and operation of the machine while the same is in use.
  • a portable chain saw comprising an elongated chain carrier having a first longitudinal axis and a circumferential edge portion; a housing rigidly connected with said carrier; a saw chain mounted on said carrier for movement circumferentially of the same along said edge portion; grip means rigid with said carrier for gripping by the hands of an operator; an internal combustion engine for imparting to said chain saw said movement and having a crankshaft extending transversely of the elongation of said carrier and a reciprocable piston having a second longitudinal axis normal to said first axis; vibration-damping elements mounting said combustion engine; and spacing means, comprising a spacing element pivotally connected with both said housing and said combustion engine so that said carrier and combustion engine are prevented from relative movement longitudinally of said carrier and transmission of vibrations between said combustion engine and said carrier is suppressed.
  • said second auxiliary components include a blower for cooling air, an ignition arrangement, a muffler, a starter unit, a centrifugal clutch, said rotary pinion and a crankshaft casing.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Vibration Prevention Devices (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Harvester Elements (AREA)
  • Sawing (AREA)
US7569A 1969-02-04 1970-02-02 Chain saw Expired - Lifetime US3680608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691905301 DE1905301A1 (de) 1969-02-04 1969-02-04 Motorkettensaege

Publications (1)

Publication Number Publication Date
US3680608A true US3680608A (en) 1972-08-01

Family

ID=5724201

Family Applications (1)

Application Number Title Priority Date Filing Date
US7569A Expired - Lifetime US3680608A (en) 1969-02-04 1970-02-02 Chain saw

Country Status (6)

Country Link
US (1) US3680608A (enrdf_load_stackoverflow)
JP (1) JPS4910039B1 (enrdf_load_stackoverflow)
DE (1) DE1905301A1 (enrdf_load_stackoverflow)
FR (1) FR2031158A5 (enrdf_load_stackoverflow)
GB (1) GB1226307A (enrdf_load_stackoverflow)
SE (1) SE360298B (enrdf_load_stackoverflow)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109290U (enrdf_load_stackoverflow) * 1973-01-11 1974-09-18
JPS49109291U (enrdf_load_stackoverflow) * 1973-01-13 1974-09-18
US3849883A (en) * 1974-01-02 1974-11-26 Outboard Marine Corp Chain saw
US3918534A (en) * 1973-04-26 1975-11-11 Fogelholm Carl Magnus Special clutch for vibration isolated chain saws
DE2611023A1 (de) * 1975-03-21 1976-09-30 Textron Inc Anordnung einer kolben-zylinder- maschine auf einem chassis
US4117594A (en) * 1977-10-02 1978-10-03 Textron Inc. Guide bar mount for chain saw
US4178685A (en) * 1977-07-29 1979-12-18 Kioritz Corporation Chain saw
US4204320A (en) * 1978-08-18 1980-05-27 Shindaiwa Kogyo Co., Ltd. Sprocket shaft stay
US4280373A (en) * 1979-11-21 1981-07-28 Philadelphia Gear Corporation Portable drive unit for valve actuator
DE3427273A1 (de) * 1983-08-01 1985-02-21 Kioritz Corp., Mitaka, Tokio/Tokyo Vergaserkammer, insbesondere fuer eine motorkettensaege
US4693735A (en) * 1985-12-24 1987-09-15 Andreas Stihl Motor-driven tool having an air filter
US4727651A (en) * 1985-01-08 1988-03-01 Komatsu Zenoah Co. Chain saw
US4770130A (en) * 1986-04-23 1988-09-13 Kioritz Corporation Chain saw
US4819742A (en) * 1987-06-12 1989-04-11 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4825548A (en) * 1987-03-31 1989-05-02 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4835866A (en) * 1986-12-17 1989-06-06 Kioritz Corporation Device for mounting carburetor on internal combustion engine
US5035586A (en) * 1989-04-19 1991-07-30 White Consolidated Industries, Inc. Portable hand-held blower/vacuum unit with resilient engine mounting system
US5269665A (en) * 1989-04-19 1993-12-14 White Consolidated Industries, Inc. Portable hand-held blower/vacuum unit with resilient engine mounting system
WO1999031378A1 (en) * 1997-11-28 1999-06-24 Aktiebolaget Electrolux Connecting device for a fuel supply unit
US6016604A (en) * 1996-08-01 2000-01-25 Andreas Stihl Ag & Co. Portable, hand-guided working tool with a rear grip
US20060137645A1 (en) * 2002-11-12 2006-06-29 Christian Friedrich Balance shaft for a reciprocating piston engine
USD607292S1 (en) * 2007-04-27 2010-01-05 Andreas Stihl Ag & Co. Kg Chain saw
USD607293S1 (en) * 2007-04-27 2010-01-05 Andreas Stihl Ag & Co. Kg Chain saw
USD741678S1 (en) 2012-04-13 2015-10-27 Andreas Stihl Ag & Co. Kg Chain saw for cutting stone
USD744308S1 (en) 2012-08-02 2015-12-01 Andreas Stihl Ag & Co. Kg Chainsaw
USD763051S1 (en) 2014-04-04 2016-08-09 Andreas Stihl Ag & Co. Kg Chainsaw
USD790303S1 (en) 2015-08-06 2017-06-27 Andreas Stihl Ag & Co. Kg Cordless chainsaw
USD826021S1 (en) 2016-02-15 2018-08-21 Andreas Stihl Ag & Co., Kg Chain saw

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE431523B (sv) * 1980-06-09 1984-02-13 Electrolux Ab Motorsag
RU2281854C1 (ru) * 2005-03-30 2006-08-20 Федеральное государственное унитарное предприятие "Машиностроительный завод им. Ф.Э. Дзержинского" Бензиномоторная пила
JP5120235B2 (ja) * 2008-12-03 2013-01-16 日立工機株式会社 エンジン作業機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224473A (en) * 1962-04-03 1965-12-21 Dobbertin Gunther Hein Wilhelm Portable engine-driven chain saws
US3372718A (en) * 1965-09-03 1968-03-12 Outboard Marine Corp Chain saw
US3530909A (en) * 1968-01-18 1970-09-29 Outboard Marine Corp Elastomerically mounted chain saw
US3542095A (en) * 1968-08-05 1970-11-24 Mcculloch Corp Chain saw with vibration isolation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224473A (en) * 1962-04-03 1965-12-21 Dobbertin Gunther Hein Wilhelm Portable engine-driven chain saws
US3372718A (en) * 1965-09-03 1968-03-12 Outboard Marine Corp Chain saw
US3530909A (en) * 1968-01-18 1970-09-29 Outboard Marine Corp Elastomerically mounted chain saw
US3542095A (en) * 1968-08-05 1970-11-24 Mcculloch Corp Chain saw with vibration isolation system

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109290U (enrdf_load_stackoverflow) * 1973-01-11 1974-09-18
JPS49109291U (enrdf_load_stackoverflow) * 1973-01-13 1974-09-18
US3918534A (en) * 1973-04-26 1975-11-11 Fogelholm Carl Magnus Special clutch for vibration isolated chain saws
US3849883A (en) * 1974-01-02 1974-11-26 Outboard Marine Corp Chain saw
DE2611023A1 (de) * 1975-03-21 1976-09-30 Textron Inc Anordnung einer kolben-zylinder- maschine auf einem chassis
US4010544A (en) * 1975-03-21 1977-03-08 Textron, Inc. Vibration reducing system for single cylinder fluid pressure engine
US4178685A (en) * 1977-07-29 1979-12-18 Kioritz Corporation Chain saw
US4117594A (en) * 1977-10-02 1978-10-03 Textron Inc. Guide bar mount for chain saw
US4204320A (en) * 1978-08-18 1980-05-27 Shindaiwa Kogyo Co., Ltd. Sprocket shaft stay
US4280373A (en) * 1979-11-21 1981-07-28 Philadelphia Gear Corporation Portable drive unit for valve actuator
DE3427273A1 (de) * 1983-08-01 1985-02-21 Kioritz Corp., Mitaka, Tokio/Tokyo Vergaserkammer, insbesondere fuer eine motorkettensaege
US4548169A (en) * 1983-08-01 1985-10-22 Kioritz Corporation Carburetor chamber
US4727651A (en) * 1985-01-08 1988-03-01 Komatsu Zenoah Co. Chain saw
US4693735A (en) * 1985-12-24 1987-09-15 Andreas Stihl Motor-driven tool having an air filter
US4770130A (en) * 1986-04-23 1988-09-13 Kioritz Corporation Chain saw
US4835866A (en) * 1986-12-17 1989-06-06 Kioritz Corporation Device for mounting carburetor on internal combustion engine
US4825548A (en) * 1987-03-31 1989-05-02 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4819742A (en) * 1987-06-12 1989-04-11 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US5035586A (en) * 1989-04-19 1991-07-30 White Consolidated Industries, Inc. Portable hand-held blower/vacuum unit with resilient engine mounting system
US5269665A (en) * 1989-04-19 1993-12-14 White Consolidated Industries, Inc. Portable hand-held blower/vacuum unit with resilient engine mounting system
US6016604A (en) * 1996-08-01 2000-01-25 Andreas Stihl Ag & Co. Portable, hand-guided working tool with a rear grip
WO1999031378A1 (en) * 1997-11-28 1999-06-24 Aktiebolaget Electrolux Connecting device for a fuel supply unit
US6276326B1 (en) 1997-11-28 2001-08-21 Aktiebolaget Electrolux Connecting device for a fuel supply unit
US20060137645A1 (en) * 2002-11-12 2006-06-29 Christian Friedrich Balance shaft for a reciprocating piston engine
US7490585B2 (en) * 2002-11-12 2009-02-17 Magna Drivetrain Ag & Co Kg Balance shaft for a reciprocating piston engine
USD607292S1 (en) * 2007-04-27 2010-01-05 Andreas Stihl Ag & Co. Kg Chain saw
USD607293S1 (en) * 2007-04-27 2010-01-05 Andreas Stihl Ag & Co. Kg Chain saw
USD741678S1 (en) 2012-04-13 2015-10-27 Andreas Stihl Ag & Co. Kg Chain saw for cutting stone
USD744308S1 (en) 2012-08-02 2015-12-01 Andreas Stihl Ag & Co. Kg Chainsaw
USD763051S1 (en) 2014-04-04 2016-08-09 Andreas Stihl Ag & Co. Kg Chainsaw
USD790303S1 (en) 2015-08-06 2017-06-27 Andreas Stihl Ag & Co. Kg Cordless chainsaw
USD826021S1 (en) 2016-02-15 2018-08-21 Andreas Stihl Ag & Co., Kg Chain saw

Also Published As

Publication number Publication date
JPS4910039B1 (enrdf_load_stackoverflow) 1974-03-07
DE1905301A1 (de) 1970-08-27
FR2031158A5 (enrdf_load_stackoverflow) 1970-11-13
GB1226307A (enrdf_load_stackoverflow) 1971-03-24
SE360298B (enrdf_load_stackoverflow) 1973-09-24

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