FR2287973A1 - Safety device for chain saw - spring-loaded swinging arm tensions band around brake drum to stop motor - Google Patents

Safety device for chain saw - spring-loaded swinging arm tensions band around brake drum to stop motor

Info

Publication number
FR2287973A1
FR2287973A1 FR7531269A FR7531269A FR2287973A1 FR 2287973 A1 FR2287973 A1 FR 2287973A1 FR 7531269 A FR7531269 A FR 7531269A FR 7531269 A FR7531269 A FR 7531269A FR 2287973 A1 FR2287973 A1 FR 2287973A1
Authority
FR
France
Prior art keywords
spring
safety device
brake drum
chain saw
swinging arm
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.)
Granted
Application number
FR7531269A
Other languages
French (fr)
Other versions
FR2287973B1 (en
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.)
Mcculloch Corp
Original Assignee
Mcculloch 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 Mcculloch Corp filed Critical Mcculloch Corp
Publication of FR2287973A1 publication Critical patent/FR2287973A1/en
Application granted granted Critical
Publication of FR2287973B1 publication Critical patent/FR2287973B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/02—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws
    • 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
    • B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
    • B27B17/083—Devices for arresting movement of the saw chain

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

The hand held chain saw includes a safety device with a swinging arm (30) located on the side of the operating handle away from the operator, i.e. nearer the saw blade, which in the event of a dangerous jerking movement, swings forwards so that a pawl (63) located near the base, above the pivot point is released by a leaf spring (60) enabling it to swing round its pivot (50) under the force of a spring (46) mounted on a spindle across the top of the housing, so that a pivot arm (42) is also swung over, tightening a band (40) around a brake drum mounted on the drive shaft so that the drive motor is stopped.
FR7531269A 1974-10-15 1975-10-13 Safety device for chain saw - spring-loaded swinging arm tensions band around brake drum to stop motor Granted FR2287973A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51504574A 1974-10-15 1974-10-15

Publications (2)

Publication Number Publication Date
FR2287973A1 true FR2287973A1 (en) 1976-05-14
FR2287973B1 FR2287973B1 (en) 1982-03-26

Family

ID=24049754

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531269A Granted FR2287973A1 (en) 1974-10-15 1975-10-13 Safety device for chain saw - spring-loaded swinging arm tensions band around brake drum to stop motor

Country Status (6)

Country Link
JP (1) JPS5914321B2 (en)
BR (1) BR7506685A (en)
CA (1) CA1028227A (en)
DE (1) DE2545992C2 (en)
FR (1) FR2287973A1 (en)
SE (1) SE7511073L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020457A1 (en) * 1978-09-18 1981-01-07 Beaird-Poulan Division, Emerson Electric Company Safety braking apparatus for portable chain saw

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032601A (en) * 1983-08-01 1985-02-19 株式会社共立 Safety brake gear for chain saw
DE4120875C2 (en) * 1991-06-21 2000-06-08 Stihl Maschf Andreas Motor chain saw with brake device integrated in the sprocket cover

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE390131B (en) * 1971-04-13 1976-12-06 Partner Ab BRAKE DEVICE FOR MOTORSAWS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020457A1 (en) * 1978-09-18 1981-01-07 Beaird-Poulan Division, Emerson Electric Company Safety braking apparatus for portable chain saw
EP0020457A4 (en) * 1978-09-18 1981-02-04 Beaird Poulan Div Safety braking apparatus for portable chain saw.

Also Published As

Publication number Publication date
JPS5914321B2 (en) 1984-04-04
CA1028227A (en) 1978-03-21
SE7511073L (en) 1976-04-20
FR2287973B1 (en) 1982-03-26
JPS5164699A (en) 1976-06-04
DE2545992C2 (en) 1984-05-30
DE2545992A1 (en) 1976-04-29
BR7506685A (en) 1976-08-31

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
ST Notification of lapse