EP0333303A1 - Chain saw guard apparatus - Google Patents

Chain saw guard apparatus Download PDF

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Publication number
EP0333303A1
EP0333303A1 EP89200849A EP89200849A EP0333303A1 EP 0333303 A1 EP0333303 A1 EP 0333303A1 EP 89200849 A EP89200849 A EP 89200849A EP 89200849 A EP89200849 A EP 89200849A EP 0333303 A1 EP0333303 A1 EP 0333303A1
Authority
EP
European Patent Office
Prior art keywords
chain saw
housing
blade
casing
clamping
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.)
Withdrawn
Application number
EP89200849A
Other languages
German (de)
English (en)
French (fr)
Inventor
Anthony David Clowes
Arthur Roger Edwards
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.)
MORTON, PAUL ROBERT
Original Assignee
Morton Paul Robert
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 Morton Paul Robert filed Critical Morton Paul Robert
Publication of EP0333303A1 publication Critical patent/EP0333303A1/en
Withdrawn legal-status Critical Current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
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/003—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • This invention relates to apparatus for use with a chain saw, particularly for providing a guard for the chain saw during testing thereof.
  • guard apparatus for use with a chain saw, the apparatus comprising means for locating a main body part of the chain saw, means for housing a blade part of the chain saw, and means for clamping the chain saw within the apparatus, whereby the chain saw can be operated for testing purposes under conditions of safety.
  • means are provided for withdrawing exhaust gases from the locating means to a remote location.
  • the locating means comprises a casing for locating the main body part, the casing being provided with at least one end wall to which is connected the housing means for the blade part, opposed side walls, and a top wall.
  • the gas withdrawing means may be connected to one of the side walls, and said one end wall may be profiled to direct gases emitted within the casing towards the withdraw­ing means.
  • the clamping means may comprise a clamping member removably locatable through a wall of the blade part housing to be engagable with the blade and provide a movable clamp, whereby the blade of the chain saw can be retained while enabling movement of the chain.
  • the means for withdrawing the exhaust gases may comprise a fan mounted within a ducting, the latter being connected to said one side wall and being adapted to lead to a suitable remote location.
  • the locating means may be at least partly lined intern strictlyally with a sound absorption material.
  • a chain saw guard comprises a casing 10 providing a base 12, a first side wall 14 and a second opposed side wall 15 mounting an outwardly projecting wall section 16 of truncated conical form which connects with ducting 18 for a purpose hereinafter described.
  • the casing 10 is further provided with an end wall 20 which is of arcuate form and is connected between respective ends of the opposed side walls, the side wall 14 being of reduced length relative to the opposed side wall.
  • a top wall 22 of the casing 10 has a first fixed section 24 towards the end of the casing defined by the end wall 20 and a second section 26 hingedly connected to the section 24.
  • the casing 10 and the ducting 18 preferably form a welded construction of mild steel plate but it will be appreciated that other materials can be used.
  • the walls 14,15,20 and 22 are pref­erably internally lined with a sound absorption material.
  • an otherwise closed housing 28 which is profiled to be capable of receiving a blade part of an electric chain saw (not shown).
  • the housing 28 is angled slightly upwardly relative to the base 12 of the casing 10 to accommodate the angle of the blade part of a conventional chain saw, is of appropriate length, and is of relatively narrow width.
  • a chain saw powered by an internal combustion engine, such as a petrol engine, can be located within the apparatus with a main body part supported on the base 12 and the blade part locating within the housing 28.
  • the hinged section 26 of the top wall 22 can be lifted to provide access to the chain saw as desired.
  • a clamp arrangement comprising a lever clamp 30 having a pivotal mounting on a bracket 32 secured on the outer face of one side of the housing 28, towards the inner end thereof.
  • the clamp 30 has a handle 34 and an operating arm 36 through which is adjustably mounted a threaded operating rod 38.
  • the latter mounts, on the end thereof facing the housing 28, a clamping pad 40 which locates through a circular opening 42 in the housing 38 between the bracket 32 and the wall 20.
  • a perspex disc (not shown) which, when the rod 38 is in an operating condition, engages against the outer wall of the housing 28 to close the opening 42.
  • the use of a transparent disc makes the saw blade visible to the operator, to enable safe location of the pad 40.
  • the lever clamp 30 is shown in the drawings in its operative condition. Movement of the handle 34 away from the housing 28 effects pivoting of the arm 36 to move the rod 38 outwardly. In the operative condition the pad 40 can engage with the saw blade and force the latter against a suitable abutment pad (not shown) secured to the inner wall of the housing 28 opposite the opening 42.
  • the threaded operating rod 38 passes through a threaded nut 44 held by the operating arm 36 to enable adjustment of the effective working length of the rod 38 and thereby adjust the clamp to be able to positively clamp different thicknesses of blade.
  • an electric motor 56 mounting a fan 58 which, when rotated, can withdraw any gases from the casing 10 into the ducting 18 and from there to the desired remote location.
  • the profiled wall 20 helps direct gases to the fan 58.
  • the fan 58 may be designed, for example, to be capable of handling fifty-five cubic feet per minute of exhaust gases.
  • a mesh may be provided in the ducting 18 at each side of the fan 58.
  • the saw In use, when it is desired to test a chain saw after service or repair, the saw is located within the casing 10 on the base 12 thereof with the blade part locating within the housing 28.
  • the operating rod 38 is then adjusted in length to suit the appropriate saw blade and the lever clamp 30 can then be operated to clamp the blade in the housing 28. In this way, the chain saw is retained securely in position during testing while still enabling movement of the chain.
  • the walls 14,15,20 and 22 are preferably lined with a sound absorption material, and to provide a padding, preferably of rubber, on the base 12. This reduces the noise and vibration to such an extent as to obviate or mitigate noise damage to personnel in the working environ­ment and thereby considerably enhance the working conditions particularly in a confined area. Also it is preferable to so profile the side walls of the casing 10 that upper sections thereof extend rearwardly of lower sections for additional safety.
  • the profile of the overall apparatus is so designed as to prevent damage to personnel in the event of inadvert­ent contact with the apparatus, and the size and weight of the apparatus enables transport by one man. Therefore test­ing can be carried out on site.
  • a tray 60 for retaining screws etc. Also at the front edge of the base 12 a sump (not shown) can be provided for draining of oil from the blade housing 28 through a suitably positioned drain hole, the angle of the housing 28 and the internal profile thereof assisting draining.
  • the profile of the casing may be other than that described and shown.
  • the side wall 14 may be replaced by an open mesh if desired.
  • a support frame (not shown) may be provided for supporting the guard apparatus at a suitable height above a floor for oper­ator access.
  • An arrangement may also be provided for retaining the chain safely in the apparatus in the event of chain breakage.
  • a modified arrangement may comprise a support of U-shaped cross-section, inverted in use, one leg of the support mounting, on an inner face, a fixed clamp.
  • On an outer face of the other leg may be provided an internally threaded boss whereby a clamping screw can be threadably engaged through the boss and through an aligned opening in the leg and pres­ent a movable clamp inwardly of the support.
  • the clamping screw may extend laterally outwardly of the casing through a vertical slot in the arcuate end wall, and may be provided externally of the casing with a handle whereby to enable manual adjustment.
  • the support may also have, freely rota­tably mounted on its base, a further clamping screw which extends upwardly through the top wall section and through an internally threaded boss mounted on the outer face thereof.
  • the further clamping screw may have a threaded section engageable with the boss, and externally of the casing is provided with a handle whereby turning of the latter provides for vertical adjustment of the support within the casing.
  • a different type of clamp for the saw blade may be provided, for example a lever clamp where the operating rod is movable along its longitudinal axis for a more effective clamping action if desired.
  • the blade housing 28 can have another openable part so that, when appropriate, the part can be opened and a card or the like placed over the opening to check the saw is correctly tuned by viewing the oiling of the card.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sawing (AREA)
EP89200849A 1988-02-18 1989-02-17 Chain saw guard apparatus Withdrawn EP0333303A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8803829 1988-02-18
GB888803829A GB8803829D0 (en) 1988-02-18 1988-02-18 Chain saw guard apparatus

Publications (1)

Publication Number Publication Date
EP0333303A1 true EP0333303A1 (en) 1989-09-20

Family

ID=10631974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89200849A Withdrawn EP0333303A1 (en) 1988-02-18 1989-02-17 Chain saw guard apparatus

Country Status (7)

Country Link
EP (1) EP0333303A1 (da)
JP (1) JPH05503668A (da)
AU (1) AU3219589A (da)
DK (1) DK198090A (da)
FI (1) FI904079A0 (da)
GB (1) GB8803829D0 (da)
WO (1) WO1989007514A1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794860A1 (fr) * 1999-06-08 2000-12-15 Alexis Marcel Jean Banc d'essai de mise au point, fixation des tronconneuses, debroussailleuses au banc, systeme de securite protection des outils de coupe en mouvement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990198A (en) * 1958-01-27 1961-06-27 Car Mon Products Company Magnetic adaptor for an exhaust pipe
GB1436727A (en) * 1972-08-28 1976-05-26 Lockheed Aircraft Corp Apparatus for noise and air pollution abatement
GB2075643A (en) * 1980-03-20 1981-11-18 Brunn Gmbh & Co Kg Sound and/or heat insulated machine housing
FR2547235A1 (fr) * 1983-06-07 1984-12-14 Stihl Andreas Scie a moteur a chaine
DE3438906A1 (de) * 1984-10-24 1986-04-24 Hans-Joachim 2412 Ritzerau Sommer Tragbare auspuffanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990198A (en) * 1958-01-27 1961-06-27 Car Mon Products Company Magnetic adaptor for an exhaust pipe
GB1436727A (en) * 1972-08-28 1976-05-26 Lockheed Aircraft Corp Apparatus for noise and air pollution abatement
GB2075643A (en) * 1980-03-20 1981-11-18 Brunn Gmbh & Co Kg Sound and/or heat insulated machine housing
FR2547235A1 (fr) * 1983-06-07 1984-12-14 Stihl Andreas Scie a moteur a chaine
DE3438906A1 (de) * 1984-10-24 1986-04-24 Hans-Joachim 2412 Ritzerau Sommer Tragbare auspuffanordnung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794860A1 (fr) * 1999-06-08 2000-12-15 Alexis Marcel Jean Banc d'essai de mise au point, fixation des tronconneuses, debroussailleuses au banc, systeme de securite protection des outils de coupe en mouvement

Also Published As

Publication number Publication date
GB8803829D0 (en) 1988-03-16
DK198090D0 (da) 1990-08-20
AU3219589A (en) 1989-09-06
FI904079A0 (fi) 1990-08-17
JPH05503668A (ja) 1993-06-17
DK198090A (da) 1990-08-20
WO1989007514A1 (en) 1989-08-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): ES GR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: EDWARDS, ARTHUR ROGER

Owner name: MORTON, PAUL ROBERT

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Effective date: 19900316

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Effective date: 19910829