SE8302101L - CHAIN SAW BRAKE SYSTEM - Google Patents

CHAIN SAW BRAKE SYSTEM

Info

Publication number
SE8302101L
SE8302101L SE8302101A SE8302101A SE8302101L SE 8302101 L SE8302101 L SE 8302101L SE 8302101 A SE8302101 A SE 8302101A SE 8302101 A SE8302101 A SE 8302101A SE 8302101 L SE8302101 L SE 8302101L
Authority
SE
Sweden
Prior art keywords
sensing arm
housing
protrusion
latch
sensing
Prior art date
Application number
SE8302101A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE459240B (en
SE8302101D0 (en
Inventor
J F West
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 SE8302101D0 publication Critical patent/SE8302101D0/en
Publication of SE8302101L publication Critical patent/SE8302101L/en
Publication of SE459240B publication Critical patent/SE459240B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
    • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

A chain saw safety braking assembly includes a sensing arm pivotally mounted to the housing and having a protrusion. A portion of the sensing arm is located in front of the gripping handle and is arranged to move from a first position to a second position in response to being struck by an appendage of the operator. A flexible brake band is disposed around the peripheral surface of a brake drum, and includes a first end anchored to the housing and a second end coupled to the sensing arm protrusion, such that when the sensing arm moves from the first position to the second position the flexible brake band is moved from a position free of the brake drum to a frictional braking relationship with the brake drum. A latch is rotatably mounted to the housing and is adapted to releasably engage the protrusion on the sensing arm. A spring anchored to the housing cooperates with the latch such that the latch yieldably holds the sensing arm in either the first or the second position. Thus when the sensing arm is struck, it will move from the first position to the second position stopping the chain movement. Additionally, an acceleration sensing assembly may be incorporated to sense acceleration of the saw, again typically due to kickback, and stop the chain should the acceleration rise above a preset level.
SE8302101A 1982-05-10 1983-04-15 BRAKE SYSTEM FOR CHAIN SAW SE459240B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37681082A 1982-05-10 1982-05-10
US45790983A 1983-01-14 1983-01-14

Publications (3)

Publication Number Publication Date
SE8302101D0 SE8302101D0 (en) 1983-04-15
SE8302101L true SE8302101L (en) 1983-11-11
SE459240B SE459240B (en) 1989-06-19

Family

ID=27007573

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8302101A SE459240B (en) 1982-05-10 1983-04-15 BRAKE SYSTEM FOR CHAIN SAW

Country Status (6)

Country Link
CA (1) CA1184476A (en)
DE (1) DE3316899C2 (en)
FI (1) FI81987C (en)
FR (1) FR2526359B1 (en)
IT (1) IT1163314B (en)
SE (1) SE459240B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802740A1 (en) * 1988-01-30 1989-08-03 Hilti Ag MOTORIZED HAND DEVICE
DE4120875C2 (en) * 1991-06-21 2000-06-08 Stihl Maschf Andreas Motor chain saw with brake device integrated in the sprocket cover
DE10353013A1 (en) 2003-11-13 2005-06-16 Robert Bosch Gmbh Hand tool
EP2447022B1 (en) 2010-10-29 2013-03-13 Spitznas Maschinenfabrik GmbH Chain brake device for a chain saw operated by pressurised air
ITTO20111167A1 (en) * 2011-12-16 2013-06-17 Active Srl BRAKING DEVICE FOR THE CUTTING CHAIN OF A MOTORIZED CHAIN CUTTING TOOL, IN PARTICULAR OF A CHAINSAW.
CN110449659B (en) * 2019-07-22 2024-05-07 浙江亚特电器股份有限公司 Oil pump position adjustment structure and chain saw of chain saw

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1389645A (en) * 1964-01-08 1965-02-19 Liogier Ets Further training in door closers
US3934345A (en) * 1974-10-15 1976-01-27 Mcculloch Corporation Snap-acting over-center chain saw safety brake and method of operation thereof
US4059895A (en) * 1974-10-15 1977-11-29 Mcculloch Corporation Full position safety brake for portable chain saw
US3982616A (en) * 1975-07-25 1976-09-28 Textron, Inc. Latch operated centrifugally released safety clutch for saws
DE7526726U (en) * 1975-08-23 1975-12-11 Stihl A Maschinenfabrik Device for braking a motor-driven hand saw, in particular a chain saw
DE2602247C2 (en) * 1976-01-22 1992-04-23 Fa. Andreas Stihl, 7050 Waiblingen Braking device on a motor-driven hand saw, in particular a motor chain saw
CA1059011A (en) * 1976-04-19 1979-07-24 Sidney Hirschkoff Full position safety brake for portable chain saw
DE3027221A1 (en) * 1980-07-18 1982-02-18 Dolmar Maschinen-Fabrik Gmbh & Co, 2000 Hamburg BRAKE DEVICE FOR BRAKING THE SAW CHAIN OF A PORTABLE MOTOR CHAIN SAW

Also Published As

Publication number Publication date
SE459240B (en) 1989-06-19
IT8320963A0 (en) 1983-05-06
FI831573A0 (en) 1983-05-06
FI831573L (en) 1983-11-11
SE8302101D0 (en) 1983-04-15
FR2526359A1 (en) 1983-11-10
DE3316899A1 (en) 1983-11-24
FI81987C (en) 1991-01-10
FI81987B (en) 1990-09-28
DE3316899C2 (en) 1994-09-08
IT8320963A1 (en) 1984-11-06
IT1163314B (en) 1987-04-08
CA1184476A (en) 1985-03-26
FR2526359B1 (en) 1986-09-12

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